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Texas oil lease

Producing

UL MASON EAST UNIT

Ul Mason East Unit is an oil lease in Andrews County, Texas, operated by Diamondback E&P LLC in the Spraberry (Trend Area) field.

4 wells

67,021bbl oil, last 12 months−27% vs prior year
Operator
Diamondback E&P LLC
County
Andrews County
Field
Spraberry (Trend Area)
RRC lease
08-48688

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Where it sits

This county

Andrews CountyAndrewsMartinGainesDawsonAndrews County
Andrews County
Gas, last 12 months
233,634 mcf
Oil in Jul 2026
4,357 bbl

Checks stopped on this lease?

  • Buyer

    Buyer changed: ONEOK MIDLAND MIDSTREAM, LLC replaced CORONADO MIDSTREAM LLC as the buyer of this lease's gas from oil wells on Apr 1, 2026.

SourceRailroad Commission production, P-5 and P-4 records, data through Jul 2026.

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Production by month

Oil output fell 27% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 27% over the last 12 monthsMonthly oil production and gas for UL MASON EAST UNIT, Aug 2023 to Jul 2026. Oil output fell 27% over the last 12 months. 67,021 bbl in the 12 months through Jul 2026, against 91,367 bbl in the 12 months before.Last 12 months: 67,021 bblbbl per monthmcf per month002,50010k5,00020k7,50030k10k40kOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 27% over the last 12 monthsMonthly oil production and gas for UL MASON EAST UNIT, Aug 2023 to Jul 2026. Oil output fell 27% over the last 12 months. 67,021 bbl in the 12 months through Jul 2026, against 91,367 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month002,50010k5,00020k7,50030k10k40kJan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

99% of the gas went to a transmission line in the last 12 months

Flaring peaked at 3.1% of the gas in Aug 2025.

  • Transmission line (2)
  • Lease fuel (1)
  • Flared (4)
99% of the gas went to a transmission line in the last 12 monthsShare of UL MASON EAST UNIT gas by disposition code each month, Aug 2023 to Jul 2026. 99% of the gas went to a transmission line in the last 12 months. Flaring peaked at 3.1% of the gas in Aug 2025.Share of the lease’s gas by disposition code, per month0%50%100%Flared 3.1%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
99% of the gas went to a transmission line in the last 12 monthsShare of UL MASON EAST UNIT gas by disposition code each month, Aug 2023 to Jul 2026. 99% of the gas went to a transmission line in the last 12 months. Flaring peaked at 3.1% of the gas in Aug 2025.Share of gas by disposition code0%50%100%Flared 3.1%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Transmission line (2)

    99% · 231,351 mcf

  • Lease fuel (1)

    0.5% · 1,149 mcf

  • Flared (4)

    0.5% · 1,134 mcf

0.5% of the gas flared in the last 12 months. One month above 3%.

4 wells on this lease

Wells on UL MASON EAST UNIT
API numberWell no.Status
42-003-473683LSActive
42-003-473694LSActive
42-003-473705LSActive
42-003-4781812LSActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Oryx Midland Oil Gathering LLCOilGathers100Apr 1, 2026–
Oneok Midland Midstream, LLCCasinghead gasBuys100Apr 1, 2026–
Enlink Permian, LLCCasinghead gasGathers100Apr 1, 2026–
Enlink Midstream Services, LLCCasinghead gasGathers100Jul 1, 2021Apr 1, 2026
Coronado Midstream LLCCasinghead gasBuys100Jul 1, 2021Apr 1, 2026
Eastex Crude CompanyOilGathers25Feb 1, 2023Apr 1, 2026
Explore Logistics LLCOilGathers25Feb 1, 2023Apr 1, 2026
Oryx Midland Oil Gathering LLCOilGathers50May 1, 2021Apr 1, 2026
Eastex Crude Company, LLCOilGathers50Jan 1, 2023Feb 1, 2023

SourceRailroad Commission Form P-4 file, Sep 24, 2026 (source).

Who buys my oilOil price check

480 acres on the newest permit

  • Worth asking

    A Rule 37 case is listed

    The RRC permit records list a Rule 37 case. This does not establish your royalty share. Ask for the permit and unit plat for your well.

Check your decimal on this lease
Permits for Ul Mason East Unit
API numberWell no.Acreson the permit
42-003-4781812LS480
42-003-473694LS480
42-003-473705LS480
42-003-473683LS480

SourceRailroad Commission drilling permits, Oct 3, 2026 (source 1, source 2).

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What Diamondback Energy, Inc. told investors it received

Diamondback E&P LLC is linked to Diamondback Energy, Inc. (FANG).
Realized prices reported by Diamondback Energy, Inc.
QuarterOil$ per bblFiling
Q2 2026$96.82SEC filing
Q1 2026$73.47SEC filing
Q4 2025$58.00SEC filing
Q3 2025$64.60SEC filing
Q2 2025$63.23SEC filing
Q1 2025$70.95SEC filing

SourceDiamondback Energy, Inc. quarterly reports, SEC EDGAR, company-wide averages before hedging.

Estimate your royalty

36 months, newest first

Ledger for UL MASON EAST UNIT
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 20264,3574,4184,1454,02573$80.46$2.89
Jun 20263,6783,4212,0562,01118$84.81$3.15
May 20265815832,6962,6570$102.13$2.94
Apr 20263,1853,24512,47712,3860$100.32$2.77
Mar 20266,3876,45527,21827,1000$91.38$3.04
Feb 20266,3836,48725,95625,8430$64.51$3.62
Jan 20267,3867,25627,41427,080207$60.04$7.72
Dec 20257,2257,34327,10526,9850$57.97$4.26
Nov 20257,1067,02425,98725,8710$60.06$3.79
Oct 20257,0956,98226,25826,1430$60.89$3.19
Sep 20256,7556,74725,72925,6140$63.96$2.97
Aug 20256,8836,98226,59325,636836$64.86$2.91
Jul 20256,0445,97823,52623,4080$68.39$3.20
Jun 20255,9945,99321,22420,989121$68.17$3.02
May 20256,2426,37721,91921,7950$62.17$3.12
Apr 20257,4857,34226,18926,0660$63.54$3.42
Mar 20257,4337,60225,57425,4470$68.24$4.12
Feb 20256,0606,06321,75121,6340$71.53$4.19
Jan 20259,3099,14029,32729,2030$75.74$4.13
Dec 20249,4499,77928,28028,1770$70.12$3.01
Nov 20249,6749,40428,44328,3380$69.95$2.12
Oct 20248,9339,13528,55028,4450$71.99$2.20
Sep 20247,4887,25122,78222,6900$70.24$2.28
Aug 20247,2567,28222,27322,1790$76.68$1.99
Jul 20247,4177,61122,38122,2770$81.80$2.07
Jun 20247,0496,80320,59520,317179$79.77$2.54
May 20246,3366,37017,83817,70148$80.02$2.12
Apr 20246,6306,71018,04417,9620$85.35$1.60
Mar 20247,3237,27918,37918,2950$81.28$1.49
Feb 20246,1916,20616,62516,5020$77.25$1.72
Jan 20247,2507,25217,27817,003140$74.15$3.18
Dec 20235,7275,67217,39117,2620$71.90$2.52
Nov 20237,2057,29520,15120,0210$77.69$2.71
Oct 20238,0408,10022,48722,058257$85.64$2.98
Sep 20237,1276,98819,06018,9340$89.43$2.64
Aug 20237,6627,68222,03321,8970$81.39$2.58

Flared above 3%

SourceTexas Railroad Commission Production Data Query, through Jul 2026. Prices: EIA, through Aug 2026. Updated Oct 2, 2026.

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This lease belongs to

OperatorDiamondback E&P LLCFieldSpraberry (Trend Area)CountyAndrews County

Diamondback E&P LLC in Andrews County

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Spraberry (Trend Area) field

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