Volume category

Volume category description

Actual (A)

Defines volume types that are calculated by the system. The alternative is manually-maintained volume types.

Fuel (F)

Defines product dispositions (volume types) that are considered fuel consumption volumes. These can be calculated by the system based on operating hours and consumption /firing rates of the device, or by providing the volumes.

Inventory (I)

Defines volume types that are considered product storage/inventory volumes. These VTs potentially represent both opening and closing inventory volumes. When recorded at a measurement point level, these VTs will be considered “closing” inventory.

Lease (L)

Defines dispositions (volume types) that are part of an exchange between well completions on the same lease. These will be calculated by the system when exchanges for gas lift, formation injection, etc. are required. In an exchange, PRA (Production) will create two transactions: the “exchange from” side is a “lease” VT category volume and the “exchange to” side is a “non-sales” VT category volume.

Non-sales (N)

Defines product dispositions (volume types) that are considered all product dispositions other than sales or fuel/lease use. This volume type (VT) is also used in exchanges between wells on the same lease on the “exchanged to” side.

Other (O)

Defines volume types that are considered non‑final product disposition volume types (plant total PVR is an example of “other”). This VT is NOT considered to be part of “calculated production, ” but its volume needs to be captured. This VT has little affect on PRA processing.

Production (P)

Defines volume types that are considered to be measurement of product production. These VTs are not part of “calculated production, ” but are used in the allocation process (as allocation basis) and for determination of meter differentials.

Receipts (R)

Defines volume types that are considered to have been received from an outside source - from another well on the same lease, from a well on another lease, from a plant, facility, or a third party. This VT does not include the portion of a product disposition produced by the well.

Sales (S)

Defines product dispositions (volume types) that are considered to have been sold. Note that calculated production is determined at a well level, based on the volume type categories:

CALCULATED PRODUCTION = Fuel + Inventory + Non Sales + Sales ‑ Lease ‑Receipts

00 - Directed Volume

VOLUME CATEGORY: Other PRA USES - Production: Yes

SYSTEM GENERATED: Yes Revenue: No

PRODUCT SPECIFIC: No Plants: Yes

01 - Measured Production

This is a measured volume that represents the amount of flow of product through a particular stream. This volume is usually a ‘real’ (as opposed to theoretical) measured volume that is associated with a meter. In PRA, this volume can be entered on allocation or deduct meter MP types. This volume type can also be used on an allocation or deduct meter, if the volume is to be calculated from stream downtime and well tests, if used in multiple stream allocations.

VOLUME CATEGORY: Sales PRA USES - Production: Yes

SYSTEM GENERATED: No Revenue: Yes (OA, VL, RD)

PRODUCT SPECIFIC: Gas Plants: Yes

PRODUCTION: Volume used as the “metered” volume, if downstream from a well completion whose theoretical calculation method is “metered” volumes. Also used to control proration of volumes at the measurement point level.

02 ‑ Adjusted Plant Production

This is the volume that is calculated from metered plant inlet (83), less plant loss (48), vent/flared (45), plant fuel (24), unaccounted for in transportation (96), residue sold (57) and adjusted for meter differential (43). This volume type is used in plant allocations.

VOLUME CATEGORY: Production RA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue: No

PRODUCT SPECIFIC: Gas Plants: Yes

03 ‑ Sales 1

This is the volume that is considered sold to third parties and/or from leases to plants or to other leases.

VOLUME CATEGORY: Sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue:

PRODUCT SPECIFIC: No (CA, VL, RD, JE):

Yes

PRODUCTION: Observed conditions MUST be recorded with the volume. Defaults are not used on VD screens. A transporter must be recorded with a sales volume. If there is one purchaser related to this particular sales point and transporter, then PRA production will also set the purchaser.

04 ‑ Closing Inventory‑Liquids

Stored liquid product volumes including plant products, oil, and condensate. This volume indicates the end of the month inventory.

VOLUME CATEGORY: Inventory PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Yes (1xx, 3xx, 4xx, 5xx)

PRODUCTION: Can be determined using gauge readings, meter readings, or by simply entering a “measured” volume on the measurement point volumes screen. It is normally recorded at either a tank measurement point or a tank battery measurement point. The tank battery CAN be used in the instance where there are multiple tanks and a single inventory volume is to be recorded. Closing inventory for one month (allocated to wells) is rolled forward as beginning inventory for the subsequent month (at the well level).

05 – Retrograde Sales  

VOLUME CATEGORY: Production

06 ‑ Stored Gas

Volume of gas stored.

VOLUME CATEGORY: Inventory PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Yes (2xx, 6xx) Plants: Yes

PRODUCTION: Used as a gas product final disposition (not in a fuel system).

PLANTS: Stored gas can be associated with a plant.

07 ‑ Check Meter Volume

Volume measured (metered) to verify sales meter readings or other measured production (VT 01) amounts. It is NOT used to adjust the allocation to wells.

VOLUME CATEGORY: Production PRA USES: Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: No

PRODUCTION: Allocated back to a well and can be used as a theoretical volume for dependency allocations.

08 ‑ Plant Other

VOLUME CATEGORY: Other PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: No

09 ‑ Lease Fuel ‑ Exchanged To

When a well completion uses more lease use volume than what it produced during a month, the first action in PRA is to transfer product from other well completions on the same lease to the extent that the other well completions have the product available. This volume type identifies the volume transferred to the well completions that is short from another/other well completions on the same lease to make up the shortage. See VT 19 for the receipt side.

VOLUME CATEGORY: Non‑sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue: No

PRODUCT SPECIFIC: Gas

PRODUCTION: Used in volume allocations and in allocated results. PRA will automatically determine and record at the well completion-level on both sides of the exchange: on the well completion receiving the exchange (VT 19 ‑ exchange from) and on the well completions contributing to the exchange (VT 09 ‑ exchange to).

10 ‑ Lease Fuel Before PM ‑ On Lease

Lease use gas (fuel) used on the same lease that produced the gas. The gas is used prior to being measured by a “production meter” (PM) (i.e., used upstream of a “production meter” and prior to being measured).

VOLUME CATEGORY: Fuel PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue:

PRODUCT SPECIFIC: Gas CA, RD, JE: No

VL: Yes

PRODUCTION: This is an estimated or metered volume used as fuel on any fuel consumption device that is upstream of an allocation or deduct meter that is capturing “measured production” (VT 01).

REVENUE: Volume is valued.

11 ‑ Lease Fuel - Compression

Lease use product used on the same lease that produced the product. VT 11 will be the normal “lease use on lease” disposition used, unless the requirements for VT 10 are met, or unless VTs 12 through 15 are needed for allocation purposes.

VOLUME CATEGORY: Fuel PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue -

PRODUCT SPECIFIC: 2xx CA, RD, JE: No

VL: Yes

PRODUCTION: This is an estimated or metered volume used as lease-use on the lease that produced the product. Often, this volume will be calculated (and this holds for any fuel consumption device) in PRA in combination with a monthly “hours up” or throughput volume transaction specified in PRA.

REVENUE: Volume is valued.

12 ‑ Lease Fuel - Dehydration

Lease use product used on the same lease that produced the product. VT 12 will be used mainly if two or more “lease use on same lease” volume types are used, and each is allocated to a different well through the use of the allocation profiles. However, if VT 12 is used instead of VT 11, it will be treated just like VT 11.

VOLUME CATEGORY: Fuel PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue -

PRODUCT SPECIFIC: Yes (2xx) CA, RD, JE: No

VL: Yes

PRODUCTION: This is an estimated or metered volume used as lease use on the lease that produced the product. Often, this volume will be calculated (and this holds for any fuel consumption device) in PRA in combination with a monthly “hours up” or throughput volume transaction specified in PRA.

REVENUE: Volume is valued.

13 ‑ Lease Fuel - Steam

Lease use product used on the same lease that produced the product. VT 13 will be used mainly if two or more “lease use on same lease” volume types are used, and each is allocated to a different well through the use of the allocation profiles. However, if VT 13 is used instead of VT 11, it will be treated just like VT 11.

VOLUME CATEGORY: Fuel PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue -

PRODUCT SPECIFIC: Yes (2xx) CA, RD, JE: No

VL: Yes

PRODUCTION: This is an estimated or metered volume used as lease use on the lease that produced the product. Often, this volume will be calculated (and this holds for any Fuel Consumption Device) in PRA in combination with a monthly “hours up” or throughput volume transaction specified in PRA.

REVENUE: Volume is valued.

14 ‑ Lease Fuel - Co-Gen Steam

Lease use product used on the same lease that produced the product. VT 14 will be used mainly if two or more “lease use on same lease” volume types are used, and each is allocated to a different well through use of the allocation profiles. However, if VT 14 is used instead of VT 11, it will treated just like VT 11.

VOLUME CATEGORY: Fuel PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue -

PRODUCT SPECIFIC: Yes (2xx) CA, RD, JE: No

VL: Yes

PRODUCTION: This is an estimated or metered volume used as lease use on the lease that produced the product. Often, this volume will be calculated (and this holds for any fuel Consumption Device) in PRA in combination with a monthly “hours up” or throughput volume transaction specified in PRA.

REVENUE: Volume is valued.

15 ‑ Lease Fuel - Co-Gen Electric

Lease use product used on the same lease that produced the product. VT 15 will be used mainly if two or more “lease use on same lease” volume types are used and each is allocated to a different well through the use of the allocation profiles. However, if VT 15 is used instead of VT 11, it will treated just like VT 11.

VOLUME CATEGORY: Fuel PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue -

PRODUCT SPECIFIC: Yes (2xx) CA, RD, JE: No

VL: Yes

PRODUCTION: This is an estimated or metered volume used as lease use on the lease that produced the product. Often, this volume will be calculated (and this holds for any Fuel Consumption Device) in PRA in combination with a monthly “hours up” or throughput volume transaction specified in PRA.

REVENUE: Volume is valued.

16 ‑ Reproduced G/L Gas

Volume of gas lift gas injected and then reproduced. This is not a product disposition VT. This VT is determined at well completion level and based on gas lift volumes from various sources. This VT represents the total amount of gas lift gas recycled and reproduced for a particular well completion.

VOLUME CATEGORY: Actual PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue: No

PRODUCT SPECIFIC: Yes (2xx)

PRODUCTION: System-generated VT based as a sum of gas lift VTs at the well completion level:

Reproduced G/L Gas (VT16) = GLG Own Well Compl (VT 51) + GLG Exchange From(VT 53) + GLG Prchd From Off Lse (VT 55).

17 ‑ Formation Production When Gas Lift

Volume of gas produced in excess of gas lift gas reproduced, determined at well completion level.

VOLUME CATEGORY: Actual PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue: No

PRODUCT SPECIFIC: Yes (2xx)

PRODUCTION: System-generated VT based on the difference between reproduced gas lift gas (VT 16) and calculated production (VT 91), both at the well completion level.

Formation Production When Gas Lift (VT 17) = Gas Lift Gas Reproduced (VT 16)(-) minus Calculated Production (VT 91)

If the difference is negative (more calculated production), then the difference is considered formation production when gas lift (VT 17). If the difference is positive (more reproduced gas lift gas (VT 16), then the difference is considered gas lift gas loss (VT 60).

18 ‑ Formation Inject‑ On Lse

Volume of product injected in the same formation and on the same lease where the product was produced.

VOLUME CATEGORY: Non‑Sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: No

PRODUCTION: This is an estimated or metered volume used as formation injection on the lease that produced the product.

19 ‑ Lease Use ‑ Exch From

When a well completion uses more lease use product than what it produced during a month, the first action in PRA is to transfer product from other well completions on the same lease to the extent that the other well completions have the product available. This volume type identifies the volume received by the well completion that is short from other well completion(s) on the same lease to make up the shortage. See VT 9 for the Exchanged-to side.

VOLUME CATEGORY: Lease PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue: No

PRODUCT SPECIFIC: Yes (2xx)

PRODUCTION: Used in volume allocations and in allocated results. PRA will automatically determine and record at the well completion level both sides of the exchange: on the well completion receiving the exchange (VT 19 ‑ exchange from) and on the well completion(s) contributing to the exchange (VT 09 ‑ exchange to).

21 ‑ Sales ‑ 2

Exactly the same as Sales ‑ 1 (VT 03).

VOLUME CATEGORY: Sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: Yes

PRODUCT SPECIFIC: No (CA, VL, RD, JE): Yes

PRODUCTION: Use of the sales ‑ 2 can facilitate the control of the allocation process by allowing special sales to be allocated separate from regular sales (VT 03). This is accomplished through the specifications in the Delivery Network Allocation Profile transaction in PRA.

24 ‑ Plant Fuel

Gas used as fuel in a plant.

VOLUME CATEGORY: Fuel PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Gas

PRODUCTION: Used in volume determination, plant volume allocation, and allocation results.

25 ‑ Slop Oil Sales

Sales of reclaimed or “slop” oil. This type of oil is defined to be “waste” oil, whose quality has been affected during extraction, processing, or storage. It also could be oil that was spilled. This can be either oil or condensate.

VOLUME CATEGORY: Sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue -

PRODUCT SPECIFIC: Oil, cond. (CA, VL.RD, JE):

Yes

PRODUCTION: This volume type is handled like any other sales volume.

26 ‑ Skim Oil Sales

Sales of oil skimmed from the surface of a pit or tank into which both oil and water have been placed. Normally, this will reflect the oil accumulated with the water disposal system. This can be either oil or condensate.

VOLUME CATEGORY: Sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue -

PRODUCT SPECIFIC: Yrd (1xx (Oil), 3xx (Cond)(CA, VL, RD, JE):

Yes

PRODUCTION: This is handled like any other sales volume type. Can be allocated with a water volume as a dependency, if water volumes have been previously allocated to those well completions.

27 ‑ Tank Cleaning

Also referred to as water draw-off. PRA treats it as a disposition of production. It is a reduction in stocks when tanks are cleaned or “bled-off” to remove excess or all BS&W (basic sediment and water) from an oil storage tank. This can be oil or condensate.

VOLUME CATEGORY: Non‑Sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Yes (1xx (Oil), 3xx (Cond)

PRODUCTION: This volume should be entered as a negative volume, resulting in a reduction of calculated production.

28 ‑ Scrubber Oil Sales

Sales of oil from a scrubber which is a vessel, in which liquids are removed from a mixture of gas and liquids. Not a part of any processing plant operations. Can be either oil or condensate.

VOLUME CATEGORY: Sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue -

PRODUCT SPECIFIC: Oil, Cond. (CA, VL, RD, JE):

Yes

PRODUCTION: This volume type handled like any other sales volume.

29 ‑ By‑passed Gas Supplied

Volume of gas that is sold out of the tailgate of the plant without being processed or consumed in the plant.

VOLUME CATEGORY: Sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Gas

PRODUCTION: Used in volume determination, plant volume allocation, and allocation results.

30 ‑ Vent/Flare ‑ On Lease

Gas vented or flared on the lease where it was produced (either directly or returned and then vented or flared) without being used in operations such as gas lift etc. This VT is NOT considered “lost.”

VOLUME CATEGORY: Non‑sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Yes (2xx, 6xx)

PRODUCTION: This is an estimated or metered volume that was either vented or flared on the lease.

NOTE: Though this is NOT a fuel consumption volume, it CAN be estimated using fuel specs and be calculated as if it were a fuel usage volume in PRA.

31 ‑ Vent/Flare ‑ Off Lease

Gas vented or flared off the lease where it was produced without being used in operations such as gas lift etc. This VT is NOT considered “lost.”

VOLUME CATEGORY: Non‑sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Gas, CO2

PRODUCTION: This is an estimated or metered volume that was either vented or flared off the lease where it was produced.

NOTE: This VT is NOT a fuel consumption volume and CANNOT be calculated as if it were a fuel usage volume in PRA.

32 ‑ By-Passed Gas Received

Volume of gas received that is sold out of the tailgate of the plant without being processed or consumed in the plant.

VOLUME CATEGORY: Receipt PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue: No

PRODUCT SPECIFIC: Gas

PRODUCTION: Used in volume determination, plant volume allocation and allocation results.

36 ‑ Hydrocarbon Extraction Loss (Texas)

Reduction/loss in the volume of gas through the processing/separation of the condensate from the wet gas stream in production facilities. This VT applies only to selected wells in Texas.

VOLUME CATEGORY: Non-salesPREMAS USES ‑ Production: Yes

SYSTEM GENERATED: Yes / No Revenue: No

PRODUCT SPECIFIC: Gas

PRODUCTION: If the well meets the following criteria, then the system will create this VT and calculate the volume to go with it. This VT is calculated and maintained at the well completion if: 1) it is an onshore Texas gas well, 2) it is producing ‑ UNLESS ‑ An override is used on the W/C Dated Characteristics screen in PRA to indicate that it should NOT be calculated. The extraction loss factor used by default is 1.1. However, the factor can be specified for a well completion on the W/C Dated Characteristics screen. It is calculated as:

Hydrocarbon Extraction Loss = Calculated Production * Extraction Factor.

(VT 36) (VT 91).

37 ‑ Casualty Loss

Volume of product lost, stolen, or otherwise unaccounted for. NOTE: VT 96 is used for “unaccounted for” in transportation.

VOLUME CATEGORY: Non‑sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: No

PRODUCTION: This VT can be set up and recorded for any product. There is no specific reference in Production Volume Allocation.

38 ‑ Lease Use ‑ Off Lease

Lease use product used on another lease than the lease that produced the product. See VT 39 for purchase side.

VOLUME CATEGORY: Sale PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue -

PRODUCT SPECIFIC: Yes (2xx) CA, RD, JE:

VL: Yes

PRODUCTION: This VT is determined by PRA at the well completion level. PRA will automatically record both sides of this sale & purchase; on the well purchasing the volume (VT 39), and on the well selling the volume (VT 38). Handled like a sales, but is included in VT 93 ‑ total off lease use.

REVENUE: Volume is valued.

39 ‑ Lease Fuel - Purchased From

Product purchased from off-lease for lease use. See VT 38 for sale side.

VOLUME CATEGORY: Receipt PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue: No

PRODUCT SPECIFIC: Yes (2xx)

PRODUCTION: This VT is determined by PRA at the well completion level. PRA will automatically record both sides of this sale and purchase; on the well purchasing the volume (VT 39), and on the well selling the volume (VT 38).

40 ‑ Purchase Fuel (Included in Lease Use)

Product purchased from off lease for on lease use.

VOLUME CATEGORY: Receipt PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue -

PRODUCT SPECIFIC: Yes (2xx) (CA, VL, RD, JE): Yes

PRODUCTION: This is an estimated or metered volume purchased from another lease or from a third party for lease, used as opposed to being generated (see VT 39 above).

41 – Calculated Acid Gas Extr. Loss

VOLUME CATEGORY: Non-Sales

Gas plant disposition which represents the sum of H2S and C02 components of gas plant inlet volumes.

42 – Plant Compression Fuel

VOLUME CATEGORY: Fuel

43 ‑ Meter Differential

The volume differential between “measured” and “calculated” production.

VOLUME CATEGORY: Other PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue: No

PRODUCT SPECIFIC: No

PRODUCTION: This VT is a calculated volume that represents the difference between calculated production (VT 91) and measured production (VT 01) (see the specific formula below). A meter differential will only be calculated and maintained at the well completion level, if this VT is specified in the Network Allocation Profile.

Meter Differential (VT 43) = Measured Production (VT = 01) ‑ Calculated Production (VT = 91) + Lease Use Before PM‑On Lse (VT = 10).

44 ‑ Hydrocarbon Extraction Loss

Reduction in the volume of wet gas processed in a gas plant from the extraction of natural gas liquids (NGLs). Does not include volume of wet gas lost from such things as plant fuel (VT 24), plant vent/flared (VT 45), unaccounted for (VT 96), etc.

VOLUME CATEGORY: Non‑sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Gas

PRODUCTION: Used in gas plant allocations.

45 ‑ Plant Vent/Flared

Gas vented or flared in a plant. This VT is NOT considered “lost.”

VOLUME CATEGORY: Non‑sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Gas, CO2

PRODUCTION: Used in gas plant allocations.

48 ‑ Plant Gain/Loss

VOLUME CATEGORY: Actual

Plant wet gas volume received (meter plant inlet (VT 83)), less adjusted plant production (02).

VOLUME CATEGORY: Actual PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue: No

PRODUCT SPECIFIC: Gas

PRODUCTION: Used in gas plant allocations.

50 ‑ GLG Received

Volume of gas received for gas lift. This volume is an offset for other places in the delivery network that are the supply points for this gas lift gas. It includes gas from any and all sources received at the reception point.

VOLUME CATEGORY: Non-sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Gas

PRODUCTION: This VT is recorded with the volume received at the GL measurement point (MP type 54). When allocated to wells, this VT will change to reflect the sources of the GL gas (own well completion, exchanged from on-lease, purchase from off-lease, etc). This disposition will not be seen at the well completion level.

51 ‑ GLG Own Well Compl

Volume of gas supplied by a well completion to itself for gas lift.

VOLUME CATEGORY: Non‑sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue: No

PRODUCT SPECIFIC: Gas

PRODUCTION: This VT is system-generated at the well completion level. Note: PRA will always go to the well completion receiving GL gas to get the GL supplied, before trying to resolve the supply through on-lease exchanges and off-lease purchases.

52 ‑ GLG Exchange To

Volume of gas supplied by a well completion to another well completion on the same lease for gas lift purposes. See VT 53 for exchange from volume.

VOLUME CATEGORY: Non‑sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue: No

PRODUCT SPECIFIC: Gas

PRODUCTION: This VT is system-generated at the well completion level, resulting from the allocation of gas lift gas, when more GL gas was injected than a well produced. The volume recorded will be the amount that the supplying well completion has available, when GL gas is allocated. PRA will automatically record both sides of the exchange: on the well completion receiving the exchange (VT 53) and on the well completions contributing to the exchange (VT 52). The volume is the difference between the amount the well completion produced and the amount it had injected for gas lift purposes.

53 ‑ GLG Exchange From

Volume of gas received by a well completion from other well completion(s) on the same lease, for gas lift purposes.

VOLUME CATEGORY: Lease PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue: No

PRODUCT SPECIFIC: Gas

PRODUCTION: This VT is system-generated at the well completion level, resulting from the allocation of gas lift gas, when more GL gas was injected than a well produced. PRA will automatically record both sides of the exchange: on the well completion receiving the exchange (VT 53) and on the well completion(s) contributing to the exchange (VT 52). The volume is the difference between the amount the well completion produced and the amount it had injected for gas lift purposes.

54 ‑ Gas Lift Sold To Off-lease

Gas sold by a well (lease) to supplement the gas lift requirements of another well on a different lease.

VOLUME CATEGORY: Sale PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue -

PRODUCT SPECIFIC: Gas CA, RD, JE: Yes

VL: Yes

PRODUCTION: This VT is system-generated at the well completion level, resulting from the allocation of gas lift gas, when more GL gas was injected than a well produced, or was available from other wells on the same lease. PRA generates both sides of the sale: on the well completion receiving the gas lift gas (VT 55), and on the well completion(s) contributing to the gas lift gas (VT 54). The volume is the difference between the amount the well completion produced plus what other wells on the same lease contributed, and the amount injected for gas lift purposes. This VT is included in the calculation of total off-lease use (VT 93).

55 ‑ Gas Lift Purchased From Off-lease

Gas received by a well (lease) to supplement the well’s gas lift requirements. The gas is produced from well(s) on a different lease.

VOLUME CATEGORY: Receipt PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue: No

PRODUCT SPECIFIC: Gas

PRODUCTION: This VT is system-generated at the well completion level, resulting from the allocation of gas lift gas, when more GL gas was injected than a well produced or was available from other wells on the same lease. PRA generates both sides of the sale: on the well completion receiving the gas lift gas (VT 55) and on the well completion(s) contributing the gas lift gas (VT 54). The volume is the difference between the amount the well completion produced plus what other wells on the same lease contributed, and the amount injected for gas lift purposes.

56 ‑ Residue Available for Sale

Volume of processed gas remaining, after sales and after residue returned to producing leases.

VOLUME CATEGORY: Production PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Gas

PRODUCTION: Used in gas plant allocations.

57 ‑ Act Residue Delivered

Volume of processed gas measured at sales meter, plus measured residue returned to the producing lease.

VOLUME CATEGORY: Other PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: Yes

PRODUCT SPECIFIC: Gas

PRODUCTION: Used in gas plant allocations.

58 ‑ Excess Residue

Volume of processed gas available for sale or return that is greater than the theoretical residue available.

VOLUME CATEGORY: Other PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Gas

PRODUCTION: Used in gas plant allocations.

60 ‑ Gas Lift Gas Loss

Gas lift gas deemed to have been lost in the formation/well bore. This situation occurs when more gas lift gas is measured as received at a well, than the amount of gas lift gas recovered.

VOLUME CATEGORY: Actual (Other) PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Gas

PRODUCTION: This VT is system-generated. The volume is the difference between calculated production and the total of gas lift gas received by a well.

Gas Lift Loss (VT 60) = Gas Lift Gas Reproduced (VT 16) ‑ Calculated Production (VT 91)

When calculated production, is less than gas received, a loss is recorded against VT 60 at the well. When calculated production is more than GL gas received, a gain needs to be recorded (VT 17) at the well.

61 – Plant CO2 Production

VOLUME CATEGORY: Actual

62 – Plant Nitrogen Production

VOLUME CATEGORY: Actual

63 – Measured Acid Gas Extr. Loss

VOLUME CATEGORY: Non-sales

64 ‑ GLG Supplied

Measured volume of gas supplied for gas lift.

VOLUME CATEGORY: Non‑sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Gas                                                                       

PRODUCTION: This VT is normally recorded on the gas lift supply measurement point (MP Type 55). When allocated to wells, the VT is changed to reflect the source VTs of the supply (Own W/C, exchanged from on-lease, sold to off-lease, etc.). This VT will not be seen at the well level.

65 – Plant CO2 Injection

VOLUME CATEGORY: Non-sales

66 ‑ NGL Production

Volume of natural gas liquids (NGLs) recovered from an extraction process against a wet gas product stream in a plant or facility.

VOLUME CATEGORY: Production PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: Yes

PRODUCT SPECIFIC: NGL

PRODUCTION: Used in gas plant allocations.

67 ‑ Formation Inj Supplied

Measured volume of product supplied for formation injection purposes.

VOLUME CATEGORY: Non‑sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Yes (2xx, 5xx, 6xx)

PRODUCTION: When PRA allocates volumes to wells, this VT will be changed to reflect the source VTs of the supply (exchanged to on-lease, sold to off-lease, etc.). This VT will not be seen at the well completion level.

68 ‑ Formation Inj Received

Measured volume of product supplied for formation injection purposes.

VOLUME CATEGORY: Non-Sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Yes (2xx, 5xx, 6xx)

PRODUCTION: When PRA allocates volumes to wells, this VT will be changed to reflect the source VTs of the supply (exchanged from on-lease, purchased from off-lease, etc.). This VT will not be seen at the well completion level.

69 ‑ Formation Inj Exchanged To

Volume of product exchanged from a well completion on a lease to another well on the same lease, for formation injection purposes.

VOLUME CATEGORY: Non‑Sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue: No

PRODUCT SPECIFIC: Yes (2xx, 5xx, 6xx)

PRODUCTION: When PRA allocates volumes to wells, PRA will automatically record both sides of the exchange: on the well receiving the exchange (VT 70 exchange from) and on the well contributing to the exchange (VT 69 exchange to).

70 ‑ Formation Inj Exchanged From

Volume of product exchanged to a well completion on a lease from another well on the same lease, for formation injection purposes.

VOLUME CATEGORY: Lease PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue: No

PRODUCT SPECIFIC: Yes (2xx, 5xx, 6xx)

PRODUCTION: When PRA allocates volumes to wells, PRA will automatically record both sides of the exchange: on the well receiving the exchange (VT 70 exchange from) and on the well contributing to the exchange (VT 69 exchange to).

71 ‑ Formation Inj – Off-Lse.

Volume of product sold off lease to another lease, for formation injection purposes.

VOLUME CATEGORY: Lease PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue -

PRODUCT SPECIFIC: Yes (2xx, 5xx, 6xx) CA, RD, JE: Yes

VL: Yes

PRODUCTION: PRA will automatically record both sides of the sale: on the well receiving the product (purchased VT 72) and the well contributing the product (VT 71). This VT is included in the calculation of total calculated off-lease use (VT 93).

72 ‑ Formation Inj ‑ Purchase From

Volume of product purchased from another lease, for formation injection purposes.

VOLUME CATEGORY: Receipt PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue: No

PRODUCT SPECIFIC: Yes (2xx, 5xx, 6xx)

PRODUCTION: PRA will automatically record both sides of the sale: on the well receiving the product (purchased VT 72) and the well contributing the product (VT 71).

73 - Returned lease fuel (RLF) Supplied

Volume of gas returned to a producing lease to ‘fire’ fuel use devices.

VOLUME CATEGORY: Non-Sales PRA USES - Production: Yes

SYSTEM GENERATED: Yes Revenue: No

PRODUCT SPECIFIC: Gas

PRODUCTION: This and other re-circulated ‘supply volume types’ are entered in the Delivery Network Allocation Profile transaction as ‘non-allocated volume types (sequence number 000 ). It is entered on the MP Allocation Profile at the RLF supply point. It will trigger volume allocation to sum all RLF receipt volumes to the supply point so that all RLF volumes are included in the proration of total production to well completions.

74 ‑ RLF Received

Volume of residue gas received from a plant by the producing lease, to fuel lease use devices.

VOLUME CATEGORY: Non-Sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue: No

PRODUCT SPECIFIC: Gas

PRODUCTION: This volume type is used for recording measured or calculated RLF received volumes at RLF receipt points. Other volume types may also be used (R1, R2, R3, R4, R5).

75 ‑ RLF Exchange To

Volume of gas returned to the producing lease for lease use purposes limited to the volume of gas exchanged from a well completion on a lease to another well on the same lease.

VOLUME CATEGORY: Non‑sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue: Yes

PRODUCT SPECIFIC: Gas

PRODUCTION: When PRA allocates gas volumes to wells, and the amount of gas returned allocated to a well completion exceeds the volume available for that well, PRA will automatically record both sides of the exchange: on the well receiving the exchange (VT 76 exchange from) and on the well contributing to the exchange (VT 75 exchange to).

76 ‑ RLF Exchanged From

Volume of residue gas received from a plant by the producing lease for lease use purposes limited to the volume of residue exchanged to a well completion on a lease from other well(s) on the same lease.

VOLUME CATEGORY: Lease PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue: No

PRODUCT SPECIFIC: Gas

PRODUCTION: When PRA allocates gas volumes to wells, and the amount of gas returned allocated to a well completion exceeds the volume available for that well, PRA will automatically record both sides of the exchange: on the well receiving the exchange (VT 76 exchange from) and on the well contributing to the exchange (VT 75 exchange to).

77 ‑ RLF Sold To

Volume of gas sold by the producing lease to another lease, for lease use purposes.

VOLUME CATEGORY: Sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue -

PRODUCT SPECIFIC: Gas CA, RD, JE: Yes

VL: Yes

PRODUCTION: When PRA does an allocation of volumes to wells, PRA will automatically record both sides of the sale: on the well purchasing the residue (VT 78) and on the well selling the residue (VT 77). Also, VT 77 is included in total calculated lease use‑off lease (VT 93).

78 ‑ RLF Purch From

Volume of gas purchased by a lease from a producing lease, for lease use purposes on the purchasing lease.

VOLUME CATEGORY: Receipt PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue: No

PRODUCT SPECIFIC: Gas

PRODUCTION: When PRA does a plant allocation of volumes to wells, PRA will automatically record both sides of the sale: on the well purchasing the residue (VT 78) and on the well selling the residue (VT 77).

79 ‑ RLF Own Well Compl

Volume of residue returned to the well completion that produced the wet gas for lease use purposes.

VOLUME CATEGORY: Fuel PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue -

PRODUCT SPECIFIC: Gas CA, RD, JE: No

VL: Yes

PRODUCTION: This volume type is system-generated at well completion level. Note: PRA will always first look to the well completion receiving RLF to get residue supplied, before trying to resolve the supply through on-lease exchanges and off-lease purchases. This VT is included in the calculation of VT 92 ‑ Total Calc Lse Use‑On Lse.

80 ‑ Allocation Volume

The volume determined at some real or imaginary (logical) measurement point, in order to control the allocation of dispositions in production.

VOLUME CATEGORY: Production PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: No

PRODUCTION: This VT is to be recorded at an allocation or deduct meter. It is used to control the allocation process and in some cases, for regulatory reporting. If the theoretical calculation method (TCM) for the well is MV (metered volumes), then either this volume type, or VT 01 may be used at the meter immediately downstream of the well completion. Any number of VT 80 volumes can be found downstream from a well completion. This volume will be used to control the pro-rating of volumes at the measurement point level. It can only be recorded on an allocation meter (MP type 17) or a deduct meter (MP Type 04).

83 ‑ Meter Plant Inlet

Volume of wet gas measured as received for processing by a gas plant.

VOLUME CATEGORY: Production PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Yes (2xx)

PRODUCTION: Used in gas plant allocations.

85 ‑ Total Injection

Total volume of a product injected into the formation (not GL injected) from any and all sources.

VOLUME CATEGORY: Other PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Yes (2xx, 5xx, 6xx)

87 ‑ STK Adjustment in Calculated Production

VOLUME CATEGORY: Non-sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: No

88 ‑ STK Adjustment not in Calculated Production

VOLUME CATEGORY: Other PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: No

90 ‑ Outside Operated Production

Production determined at a well level for an outside operated well. In most cases, this will be pseudo wells, not actual wells.

VOLUME CATEGORY: Other PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: No

PRODUCTION: This volume can be recorded directly at the well level. This volume can also be recorded at the MP level, but unless there are multiple wells, there is little business reason for recording at the MP level.

91 ‑ Calculated Production

Production determined at a well level. It is equivalent to closing stock, plus actual product dispositions, less opening stock, less acquisitions.

VOLUME CATEGORY: Actual PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue -

PRODUCT SPECIFIC: No (CA, VL, RD, JE): Yes

PRODUCTION: This is a system-calculated volume. This volume is considered to be the pro‑rated “allocated” production of the well for that product. It is calculated by adding and subtracting allocated volumes, based on the volume categories of their VTs:

CALCULATED PRODUCTION = Fuel + Inventory + Non Sales + Sales ‑ Lease ‑ Receipts

This is the VT that PRA uses to report to regulatory agencies, in order to indicate production.

92 ‑ Total Calc Lse Use ‑ On Lse

Volume determined at a well level, is the sum of the following lease-use volume dispositions:

VT 92 = VT 10: Lease Use Before PM ‑ On Lse + VT 11: Lease Use ‑1‑ On Lse

+ VT 12: Lease Use ‑2‑ On Lse + VT 13: Lease Use ‑3‑ On Lse

+ VT 14: Lease Use ‑4‑ On Lse + VT 15: Lease Use ‑5‑ On Lse

+ VT 79: Return Lease fuel own well completion

+ VT R1: Return Lease fuel 1 + VT R2: Return Lease fuel 2

+ VT R3: Return Lease fuel 3 + VT R4: Return Lease fuel 4

+ VT R5: Return Lease fuel 5

VOLUME CATEGORY: Actual PRA USES ‑ Production: No

SYSTEM GENERATED: Yes Revenue: Yes

PRODUCT SPECIFIC: No

PRODUCTION: This VT is a system-calculated volume.

93 ‑ Total Calc Lse Use ‑ Off Lse

Volume determined at a well level, is the sum of the following lease use volume dispositions:

VT 93 = VT 38: Lease Use ‑ Offlse + VT 54: GLG Sold to Off-lease

+ VT 71: Gas Inj Sold + VT 77: RLF Sold to

VOLUME CATEGORY: Actual PRA USES ‑ Production: No

SYSTEM GENERATED: Yes Revenue: Yes

PRODUCT SPECIFIC: No

PRODUCTION: This VT is a system-calculated volume.

94 ‑ Summed NGL Products

Calculated total volume of plant products (all NGLs) for a gas plant ‑and/or‑ for a lease.

VOLUME CATEGORY: Actual PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue: Yes

PRODUCT SPECIFIC: NGL

PRODUCTION: Used in gas plant allocations.

95 ‑ Theoretical Residue

Theoretical volume of residue remaining for each well completion ‑and/or‑ for a gas plant after subtracting plant shrinkage, plant fuel, and plant vent/flare from adjusted plant inlet measured volumes.

VOLUME CATEGORY: Actual PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Gas

PRODUCTION: Used in gas plant allocations.

96 – Unaccounted for

VOLUME CATEGORY: Actual

99 ‑ Total Sales

Sum of allocated sales dispositions at a well completion level.

VOLUME CATEGORY: Actual PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue: No

PRODUCT SPECIFIC: No

PRODUCTION: This VT is a system-calculated volume, determined by adding all the volumes with a category of sales for a particular product.

A1 – Purchased Fuel   - Compression

A2 – Purchased Fuel - Dehydration

A3 – Purchased Fuel - Steam

A4 – Purchased Fuel – CO-Gen Steam

A5 – Purchased Fuel – CO – Gen Electric

A6 – Purchased Fuel - undistributed

CI ‑ Cumulative Injection (Wyoming)

Cumulative injection volume is at the well completion level for Wyoming wells only. This CI volume is the cumulative injection volume over the life of the well.

VOLUME CATEGORY: Other PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Yes (2xx, (5xx, 6xx)

PRODUCTION: VT is entered into PRA volume entry screens at the well completion level. It is not allocated and its only use is to report its volumes on regulatory reports for Wyoming (WYOMING‑Form 2).

CM ‑ Commercial Disposal Facility (Co)

Water production volumes disposed at a commercial disposal facility (commercial means that the operator of the facility is paid for disposing water and other oil field products). The volume may contain a mixture of water and oil waste product, but it is identified as water.

VOLUME CATEGORY: Non‑sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Yes (5xx)

PRODUCTION: VT is entered into PRA volume entry screens at the well completion level. It is not allocated and its only use is to report its volumes on regulatory reports for Colorado Form 7.

CP – CO2 Purchased From Offset WC

CR – Condensate Reduction

VOLUME CATEGORY: Non-Sales

CS – CO2 Sold to Off-lease

CT ‑ Central Disposal Facility (Co)

Water production volumes disposed at a facility used for disposal of water. The facility is operated by one or more oil and gas operators in conjunction with a field operator’s agreement, approved by the commission. The volume may contain a mixture of water and oil waste product, but it is identified and considered as water.

VOLUME CATEGORY: Non‑sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Yes (5xx)

PRODUCTION: VT is entered into PRA volume entry screens at the well completion level. It is not allocated and its only use is to report its volumes on regulatory reports for Colorado Form 7.

F1 – Plant Fuel – Recovery

VOLUME CATEGORY: Fuel

F2 – Plant Fuel – Distillation

VOLUME CATEGORY: Fuel

F3 – Plant Fuel – Fractionation

VOLUME CATEGORY: Fuel

FC – Plant Fuel – Credit

VOLUME CATEGORY: Other

FG – Formation Gas

FP - Fuel Produced in a Fuel System

Total volume of gas to be used to either return to lease for fuel use, flare, or other final dispositions in a fuel system delivery network.

VOLUME CATEGORY: Fuel PRA USES - Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Gas

PRODUCTION: This volume type is used exclusively in fuel system delivery networks at produced fuel measurement points (type 72). This volume is allocated from produced fuel points through allocation/deduct meters to final dispositions in the fuel system. It can be entered on the normal gas volume entry screen in PRA or uploaded in the fuel system through a field data collection device interface.

FR - Fuel Purchased in a Fuel System

Volume of gas brought into the fuel system through an outside source, but is then commingled with produced fuel to use on leases as fuel, flare, or other dispositions.

VOLUME CATEGORY: Fuel PRA USES - Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Gas

PRODUCTION: This volume type is used exclusively in fuel system delivery networks at purchased fuel measurement points (type 40). This volume is allocated from purchased fuel points through allocation/deduct meters to final dispositions in the fuel system. It is usually entered on the normal gas volume entry screen in PRA. Although in a fuel system, this volume type is considered a ‘disposition in the allocation, when the volume is transferred to the producing network after fuel system allocation, it would be considered a receipt.

FU - Fuel Usage in a Fuel System

Estimated volume of gas usage at final dispositions in a fuel system.

VOLUME CATEGORY: Production PRA USES - Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Gas

PRODUCTION: This volume type is used exclusively in fuel system delivery networks. They can be entered for various measurement point types, but these MPs must be final dispositions (furthest upstream nodes) in the fuel system. Volume can be entered on-line as a ‘measured volume’ on the gas volume entry screen in PRA, or calculated using fuel use/throughput specs and transactional hourly /throughput rates either on-line or in the volume allocation batch processes. The volume is used as the ‘theoretical volume’ at final dispositions for proration of allocated produced or purchased fuel.

GC – GCNM Extraneous Gas

VOLUME CATEGORY: Production

IJ – Monthly Injection Volume

VOLUME CATEGORY: Non-Sales

IT – Intermitter

VOLUME CATEGORY: Non-Sales

LF – Total On-Lease Fuel – Rep. Well

L1 ‑ Load/Transfer Oil Sales

Volume of oil sold for the purpose of load oil or for tank to tank transfer.

VOLUME CATEGORY: Sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue -

PRODUCT SPECIFIC: Yes (1xx, 3xx) CA: No

VL, RD, JE: Yes

PRODUCTION: This VT is handled like other sales VTs in PRA. A difference is in the recording of these volumes. When an L1 volume is recorded, the destination is also recorded. In the case of load oil, the destination well completion is indicated. In tank to tank transfers, the destination tank (measurement point) is indicated.

L2 ‑ Load/Transfer Oil Received

Volume of oil received as a result of a transfer for load oil or for a tank to tank transfer, or for a purchase from a third party.

VOLUME CATEGORY: Actual PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue -

PRODUCT SPECIFIC: Yes (1xx, 3xx) CA - No

VL, RD, JE: Yes

PRODUCTION: Volume of oil received at a tank (tank to tank transfer) or at a well completion (load oil). If a VT L1 is recorded, a VT L2 is automatically created / maintained by the system or a volume for a VT L2 can be manually entered for volumes purchased from a third party.

L3 ‑ Load/Transfer Oil Inventory

Volume of oil on hand resulting from a load oil movement or from a tank to tank transfer. It can represent part of the volume on hand with traditional inventory volumes (closing inventory ‑ liquids VT 04).

VOLUME CATEGORY: Other PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue: No

PRODUCT SPECIFIC: Yes (1xx, 3xx)

PRODUCTION: Inventory of load/transfer oil on hand will only be present at a well completion level. This inventory will be increased or be created automatically with L2 volumes and will be reduced automatically by L4 and L5 volumes. The reduction of L3 inventory is restricted by the rule that load/transfer oil inventory cannot be disposed until it has been received. Therefore, no L4 or L5 volume can reduce L3 volume if the L1 or manually entered L2 run ticket date occurs after the L4 or L5 run ticket date.

L4 ‑ Load/Transfer Oil Recovered

Sales volume of oil deemed to have been recovered against load oil or tank to tank transfer inventories VTs L3. This is considered a “sales” disposition. PRA always attributes sales to be a recovery of load/ transferred oil received/inventory prior to deeming it to be part of production. The rule stating that load/transferred oil inventory cannot be disposed until it has been received, restricts L4 volume from reducing L3 volume, if the L1 or manually entered L2 run ticket date creating the L3 inventory occurs after the L4 run ticket date.

VOLUME CATEGORY: Actual PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue -

PRODUCT SPECIFIC: Yes (1xx, 3xx) CA, RD: No

VL, JE: Yes

PRODUCTION: Volume of load oil subsequently recovered, present only at a well completion level. VT L4 is system generated. The run ticket volume will contain a VT 03 sales ‑ 1 or VT 21 sales ‑ 2. Volume allocation will determine, if all or just part of the VT 03 or VT 21 should be VT L4.

L5 ‑ Transfer 100% Oil

Transfer of oil deemed to have been recovered against load oil or tank to tank transfer inventories VTs L3. L5 is a transfer just like VT L1, but PRA will attribute L5 to be a recovery of load/transferred oil received/inventory prior to deeming it to be part of production. The rule stating that load/transferred oil inventory cannot be disposed until it has been received, restricts L5 volume from reducing L3 volume, if the L1 or manually entered L2 run ticket date creating the L3 inventory occurs after the L5 run ticket date.

VOLUME CATEGORY: Actual PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue -

PRODUCT SPECIFIC: Yes (1xx, 3xx) CA, RD: No

VL, JE: Yes

PRODUCTION: Volume of load oil subsequently recovered, present only at a well completion level. VT L5 is system generated. The run ticket volume will contain a VT L1 Load/Transfer Oil Sales. Volume allocation will determine, if all or just part of the VT L1 should be VT L5.

REVENUE: If this L5 oil is 100% company-owned oil and therefore no taxes or royalties will be paid on it.

NU – Non-unit Extraneous Gas

VOLUME CATEGORY: Production

OB ‑ Overboard (OGOR)

Water production volumes disposed OVERBOARD off an offshore production platform.

VOLUME CATEGORY: Non‑sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Yes (5xx)

PRODUCTION: VT is loaded into PRA through FDE or VD screens at the Well completion level. It is not allocated and its only use is to report its volumes on OGOR regulatory reports.

OS – Onshore/Offshore (OGOR)

VOLUME CATEGORY: Production

PA ‑ Prchd GL Used As Sales

This gas volume was purchased and used in a gas lift system after it was reproduced, this VT indicates it was sold to a third party, to a plant, or to another lease.

VOLUME CATEGORY: Receipts PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue -

PRODUCT SPECIFIC: Gas (CA, VL, RD, JE): Yes

PRODUCTION: PRA should generate the volume for this VT based on delivery network configuration (determines whether GL system is rotative or non-rotative) and the fact the GL well did not supply all of its own GLG. This VT is handled like any other sales VT.

PC ‑ Prchd GL Used As Lease Use ‑ On Lse

This gas volume was purchased and used in a gas lift system and then this VT indicates it was used on the same lease that produced the product.

VOLUME CATEGORY: Receipts PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue -

PRODUCT SPECIFIC: Yes (2xx) CA, RD, JE, VL:

Yes

PRODUCTION: PRA should generate the volume for this VT based on delivery network configuration (determines whether GL system is rotative or non-rotative) and the fact the GL well did not supply all of its own GLG. This VT is handled like any other fuel VT.

REVENUE: Volume is valued.

PD – Purchased Lease Fuel - Dehydration

PE – Purchased Lease Fuel - Steam

PF – Purchased Lease Fuel – Co Gen Steam

PG – Purchased Lease Fuel – Co Gen Electric

PH – RLF – Purchased for Lease Fuel

PI – Inj. Purchased from Plant

VOLUME CATEGORY: Receipts

PJ – Exch. from Sales

PK – Exch. from for Lease Fuel

PL – Exch. from for Lease Fuel – Compression

VOLUME CATEGORY: Receipts

PM – Exchange from Lease fuel - dehydration

PN – Exchange from for Return Lease Fuel

PO – Exch from for Lease Fuel - Steam

PP – Exch from for lease fuel – CO Gen.

PQ – Exch. from for Lease fuel – CO Gen. Elec.

PR – RLF purchased from Plant

VOLUME CATEGORY: Receipts

PS ‑ Prchd GL Used As Gas Lift Gas Loss

This gas volume was purchased and used in a gas lift system and this VT indicates the difference between the measured volume injected for gas lift exceeding the measured gas lift volume produced during a month of operations, limited to the portion that was purchased gas.

VOLUME CATEGORY: Receipts PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue -

PRODUCT SPECIFIC: Gas (CA, VL, RD, JE): Yes

PRODUCTION: This VT is system generated. First, the difference between calculated production and the total of gas lift gas received by a well is calculated as follows:

Gas Lift Loss (VT 60) = Gas Lift Gas Reproduced (VT 16) ‑ Calculated Production (VT 91)

When calculated production is less than gas received, a loss is calculated for VT 60 at the well. Next, the calculated VT 60 attributed to VT 55 GLG purchased from off-lease will be recorded to VT PS at the well. This recording will reduce the actual volume recorded to VT 60.

PT – Purchased Vent / Flare

VOLUME CATEGORY: Receipts

PU – Purchased Gas for Lease Use

VOLUME CATEGORY: Other

PV – Exch from for Vent/Flare

VOLUME CATEGORY: Receipts

PW - Produced Water

Volume type to record a total water production volume at a measurement point.

VOLUME CATEGORY: Non-Sales PRA USES - Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Yes (5xx (Water))

PRODUCTION: This volume type is used to capture a produced water volume at a MP so that the volume can be allocated upstream to well completions.

P1 – Returned Plant Fuel 1

VOLUME CATEGORY: Fuel

P2 – Returned Plant Fuel 2

VOLUME CATEGORY: Fuel

P3 – Purchased Returned Plant Fuel 1

VOLUME CATEGORY: Other

P4 – Purchased Returned Plant Fuel 2

VOLUME CATEGORY: Other

RA ‑ Rprd Extraneous Gas Sales

This gas volume was purchased and injected into a formation. This VT indicates it was sold to a third party, to a plant or to other leases. Note that this is not all reproduced injected gas that is sold, but only the volume that was purchased and injected.

VOLUME CATEGORY: Sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue -

PRODUCT SPECIFIC: Gas CA, VL, JE: Yes

RD: No

PRODUCTION: A percentage of extraneous gas will be entered in PRA, either at the well or measurement point level. This percentage will be used to calculate the amount of sales volumes (VT 03 and 21) allocated to well completions, as VT RA.

RG - Reproduced Gas

Special volume type to record reproduced CO2.

VOLUME CATEGORY: Other PRA USES - Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Gas

PRODUCTION: This volume type is used to record reproduced CO2 gas in volume allocation. It does not count against calculated production.

RR – Residue Received (Chained Nwk.)

VOLUME CATEGORY: Fuel

RS – Residue Supplied (Chained Nwk.)

VOLUME CATEGORY: Fuel

R1 - RLF Received 1

Volume of gas returned to lease for fuel / flare disposition.

VOLUME CATEGORY: Fuel PRA USES - Production: Yes

SYSTEM GENERATED: No Revenue: Yes

PRODUCT SPECIFIC: Gas

PRODUCTION: This volume type is used exclusively in return lease fuel allocations. The volumes are entered at measurement points designated as RLF usage points. These volumes will be the returned lease fuel receipt volumes that are summed to the RLF supply point during proration of total production to well completions (VAB3050/PAB3050). They are established along with the other RLF received volume types (R2-R5, 74) in that they allow for allocation of RLF in the same delivery network on different dependencies. The volume can be entered as a measured volume on the gas volume entry screen in PRA, calculated from hourly/throughput rates, uploaded, or be calculated from allocated fuel usage volumes in a fuel system delivery network.

R2 - RLF Received 2

Volume of gas returned to lease for fuel/flare disposition.

VOLUME CATEGORY: Fuel PRA USES - Production: Yes

SYSTEM GENERATED: No Revenue: Yes

PRODUCT SPECIFIC: Gas

PRODUCTION: This volume type is used exclusively in return lease fuel allocations. The volumes are entered at measurement points designated as RLF usage points. These volumes will be the returned lease fuel receipt volumes that are summed to the RLF supply point during proration of total production to well completions (VAB3050/PAB3050). They are established along with the other RLF received volume types (R1, R3-R5, 74) in that they allow for allocation of RLF in the same delivery network on different dependencies. The volume can be entered as a measured volume in the gas volume entry transaction in PRA, calculated from hourly/throughput rates, uploaded, or be calculated from allocated fuel usage volumes in a fuel system delivery network.

R3 - RLF Received 3

Volume of gas returned to lease for fuel/flare disposition.

VOLUME CATEGORY: Fuel PRA USES - Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Gas

PRODUCTION: This volume type is used exclusively in return lease fuel allocations. The volumes are entered at measurement points designated as RLF usage points. These volumes will be the returned lease fuel receipt volumes that are summed to the RLF supply point during proration of total production to well completions (VAB3050/PAB3050). They are established along with the other RLF received volume types (R1, R2, R4, R5, 74), in that they allow for allocation of RLF in the same delivery network on different dependencies. The volume can be entered as a measured volume on the gas volume entry screen in PRA, calculated from hourly/throughput rates, uploaded, or be calculated from allocated fuel usage volumes in a fuel system delivery network.

R4 - RLF Received 4

Volume of gas returned to lease for fuel/flare disposition.

VOLUME CATEGORY: Fuel PRA USES - Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Gas

PRODUCTION: This volume type is used exclusively in return lease fuel allocations. The volumes are entered at measurement points designated as RLF usage points. These volumes will be the returned lease fuel receipt volumes that are summed to the RLF supply point during proration of total production to well completions (VAB3050/PAB3050). They are established along with the other RLF received volume types (R1-R3, R5, 74) in that they allow for allocation of RLF in the same delivery network on different dependencies. The volume can be entered as a measured volume on the gas volume entry screen in PRA, calculated from hourly/throughput rates, uploaded, or be calculated from allocated fuel usage volumes in a fuel system delivery network.

R5 - RLF Received 5

Volume of gas returned to lease for fuel/flare disposition.

VOLUME CATEGORY: Fuel PRA USES - Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Gas

PRODUCTION: This volume type is used exclusively in return lease fuel allocations. The volumes are entered at measurement points designated as RLF usage points. These volumes will be the returned lease fuel receipt volumes that are summed to the RLF supply point during proration of total production to well completions (VAB3050/PAB3050). They are established along with the other RLF received volume types (R1-R4, 74) in that they allow for allocation of RLF in the same delivery network on different dependencies. The volume can be entered as a measured volume on the gas volume entry screen in PRA, calculated from hourly/throughput rates, uploaded, or be calculated from allocated fuel usage volumes in a fuel system delivery network.

SA ‑ Sold GL Used As Sales

This gas volume was sold and used in a gas lift system. This VT indicates after it was used for gas lift, it was sold to a third party, to a plant, or to other leases. This VT is recorded against the well that produced the gas, not the well that received the gas, and used it in its gas lift operations.

VOLUME CATEGORY: Sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue -

PRODUCT SPECIFIC: Gas (CA, VL, RD, JE): Yes

PRODUCTION: PRA should generate the volume for this VT based on delivery network configuration (determines whether GL system is rotative or non‑rotative) and the fact the GL well did not supply all of its own GLG. This VT is handled like any other sales VT.

SB – Sale for Lease Fuel

SC ‑ Sold GL Used As Lease Use ‑ On Lse

This gas volume was sold and used in a gas lift system. This VT indicates after it was used for gas lift, the gas was then used as lease use gas on the same well that used the gas for gas lift. This VT is recorded against the well that produced the gas, and not the well that received the gas and used it in its gas lift operations.

VOLUME CATEGORY: Sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue -

PRODUCT SPECIFIC: Yes (2xx) CA, RD, JE: No

VL: Yes

PRODUCTION: PRA should generate the volume for this VT based on delivery network configuration (determines whether a GL system is rotative or non‑rotative) and the fact the GL well did not supply all of its own GLG. This VT is handled like any other fuel VT and is included in VT 93 ‑ total calculated lease use ‑ off lease.

REVENUE: Volume is valued.

SD – Sale for Lease Fuel -   Dehydration

SE – Sale for Lease Fuel – Steam

SF – Sale for Lease Fuel – CO-Gen Steam

SG – Sale for Lease Fuel – CO-Gen Electric

SH – Sale for Return lease Fuel

SI – Sale for Lease Fuel – Compression

VOLUME CATEGORY: Sales

SK – Exch To For Lease Fuel

SL – Exch. To For Lease Fuel – Compression

VOLUME CATEGORY: Sales

SM - Exch. To For Lease Fuel – Dehydration

SN - Exch. To For Return Lease Fuel

SO – Exch. To For Lease Fuel – Steam

SQ - Exch. To For Lease Fuel – CO-Gen Electric

SS ‑ Sold GL Used As Gas Lift Gas Loss

This gas volume was sold and used in a gas lift system. This VT indicates the difference between the measured volume supplied for gas lift and the calculated production (VT 91) during a month of operations, limited to the volume supplied (VT 54). This VT is recorded against the well that produced the gas, not the well that received the gas.

VOLUME CATEGORY: Sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: Yes Revenue -

PRODUCT SPECIFIC: Gas CA, VL, RD, JE: No

PRODUCTION: This VT is system-generated. First, the difference between calculated production and the total of gas lift gas received by a well is calculated as follows:

Gas Lift Loss (VT60) = Gas Lift Gas Reproduced (VT16) ‑ Calculated Production (VT 91)

When calculated production is less than gas received, a loss is calculated for VT 60 at the well. Next the calculated VT 60 attributed to VT 55 GLG purchased from off-lease will be recorded to VT PS at the well. The offset or VT 54 GLG sold to off-lease will be used to determine the volume recorded to VT SS for the well supplying the gas.

ST – Sale for Vent / Flare

VOLUME CATEGORY: Sales

SV – Sale To for Vent / Flare

VOLUME CATEGORY: Sales

T1 – Uncorrected Run Volume

VOLUME CATEGORY: Production

T2 – Uncorrected Production Volume

VOLUME CATEGORY: Production

T3 ‑ Irrigation Gas Sales

Volume of gas sold to a farmer for the purpose of running irrigation equipment in the fields. It receives special tax breaks.

VOLUME CATEGORY: Sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue -

PRODUCT SPECIFIC: Yes (2xx) CA: No

VL, RD, JE: Yes

PRODUCTION: Handled like any other sales VT in PRA production. There are special reporting requirements in tax reports, and special handling in PRA revenue.

T4 – Theoretical Exchanged to On-Lease

VOLUME CATEGORY: Other

T5 – Theoretical Exchanged to Off-Lease

VOLUME CATEGORY: Other

TC – Theoretical Condensate

VOLUME CATEGORY: Other

TO – Trucked Off

VOLUME CATEGORY:Non-Sales

VR – Measured VRU Production

VOLUME CATEGORY: Production

WC -Water Chain

Water production from oil and gas producing wells in a water chain delivery network.

VOLUME CATEGORY: Non-Sales PRA USES - Production: Yes

SYSTEM GENERATED: Yes Revenue: No

PRODUCT SPECIFIC: Water

PRODUCTION: This volume type is generated at a water chain measurement point in a water chain network. The equation it uses is: WC = (WI+WD) - WS; where WI is water injected, WD is water disposed, and WS is water supplied. The resulting volume is allocated to contributing oil and gas producing wells.

WD - Water Disposed into a Formation

Water disposed in a water chain delivery network.

VOLUME CATEGORY: Receipt PRA USES - Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Water

PRODUCTION: This volume type is used to denote water injected into disposal wells in a water chain network. Volume is either designated at the well completion or entered at the appropriate measurement point.

WI -Water Injected

Water injected into an injection/cyclic well.

VOLUME CATEGORY: Non-sales PRA USES - Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Water

PRODUCTION: This volume type is used to denote water injected into injection wells. Volume is either designated at the well completion, or entered at the appropriate measurement point.

WP ‑ Water Pit

Water production volumes disposed in a retaining pit.

VOLUME CATEGORY: Non‑sales PRA USES ‑ Production: Yes

SYSTEM GENERATED: No Revenue: No

PRODUCT SPECIFIC: Yes (5xx)

PRODUCTION: VT is loaded into PRA through the VD screens at the well completion level. It is not allocated, but it can be used to report its volumes on OGOR regulatory reports or for other water production dispositions (if water disposed in a pit).

WS -Supplied Water

Water from supply or service wells in a water chain delivery network.

VOLUME CATEGORY: Non-Sales PRA USES - Production: Yes

SYSTEM GENERATED: Yes Revenue: No

PRODUCT SPECIFIC: Water

PRODUCTION: This volume type is used to denote water produced from supply or service wells in a water chain network. Volume is either designated at the well completion, or entered at the appropriate measurement point.

XS – Excess Scrubber Oil

VOLUME CATEGORY: Production

1C – Compression Fuel – 1st Stage

2C – Compression Fuel – 2nd Stage

3C – Compression Fuel – 3rd Stage