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Texas oil lease

Producing

UL MASON WEST UNIT

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

11 wells

386,753bbl oil, last 12 months+156% vs prior year
Operator
Diamondback E&P LLC
County
Andrews County
Field
Spraberry (Trend Area)
RRC lease
08-49200

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Where it sits

This county

Andrews CountyAndrewsMartinGainesDawsonAndrews County
Andrews County
Gas, last 12 months
395,932 mcf
Oil in Jul 2026
156,986 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 rose 156% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output rose 156% over the last 12 monthsMonthly oil production and gas for UL MASON WEST UNIT, Aug 2023 to Jul 2026. Oil output rose 156% over the last 12 months. 386,753 bbl in the 12 months through Jul 2026, against 151,188 bbl in the 12 months before.Last 12 months: 386,753 bblbbl per monthmcf per month0050k50k100k100k150k150k200k200kOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output rose 156% over the last 12 monthsMonthly oil production and gas for UL MASON WEST UNIT, Aug 2023 to Jul 2026. Oil output rose 156% over the last 12 months. 386,753 bbl in the 12 months through Jul 2026, against 151,188 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month0050k50k100k100k150k150k200k200kJan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

98% of the gas went to a transmission line in the last 12 months

  • Transmission line (2)
  • Lease fuel (1)
  • Flared (4)
98% of the gas went to a transmission line in the last 12 monthsShare of UL MASON WEST UNIT gas by disposition code each month, Aug 2023 to Jul 2026. 98% of the gas went to a transmission line in the last 12 months.Share of the lease’s gas by disposition code, per month0%50%100%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
98% of the gas went to a transmission line in the last 12 monthsShare of UL MASON WEST UNIT gas by disposition code each month, Aug 2023 to Jul 2026. 98% of the gas went to a transmission line in the last 12 months.Share of gas by disposition code0%50%100%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Transmission line (2)

    98% · 387,346 mcf

  • Flared (4)

    1.7% · 6,714 mcf

  • Lease fuel (1)

    0.5% · 1,872 mcf

1.7% of the gas flared in the last 12 months. No month above 3%.

11 wells on this lease

Wells on UL MASON WEST UNIT
API numberWell no.Status
42-003-474718LSActive
42-003-474729LSActive
42-003-4760410LSActive
42-003-4760511LSActive
42-003-491603JMShut-in
42-003-491612WBShut-in
42-003-491622MSShut-in
42-003-491633WDShut-in
42-003-491641WBShut-in
42-003-491651WDShut-in
42-003-491661JMShut-in

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Eastex Crude Company, LLCOilGathers50May 11, 2026–
Oryx Midland Oil Gathering LLCOilGathers50May 11, 2026–
Oneok Midland Midstream, LLCCasinghead gasBuys100Apr 1, 2026–
Enlink Permian, LLCCasinghead gasGathers100Apr 1, 2026–
Oryx Midland Oil Gathering LLCOilGathers100Apr 1, 2026May 11, 2026
Enlink Midstream Services, LLCCasinghead gasGathers100Jul 1, 2021Apr 1, 2026
Coronado Midstream LLCCasinghead gasBuys100Jul 1, 2021Apr 1, 2026
Eastex Crude Company, LLCOilGathers50Mar 30, 2026Apr 1, 2026
Oryx Midland Oil Gathering LLCOilGathers50May 1, 2021Apr 1, 2026
Eastex Crude CompanyOilGathers25Feb 1, 2023Mar 30, 2026

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

Who buys my oilOil price check

800 acres on the newest permit

  • Good to know

    11 wells are listed on this lease

    Each well can have its own unit. The decimal for one well does not have to equal the decimal for another.

Check your decimal on this lease
Permits for Ul Mason West Unit
API numberWell no.Acreson the permit
42-003-491661JM800
42-003-491603JM800
42-003-491612WB800
42-003-491622MS800
42-003-491633WD800
42-003-491641WB800
42-003-491651WD800
42-003-4760410LS800
42-003-4760511LS800
42-003-474718LS800
42-003-474729LS800

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

Unit decimal checker

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 WEST UNIT
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 2026156,986157,195156,706152,7333,302$80.46$2.89
Jun 2026104,467103,628117,645114,1882,768$84.81$3.15
May 202630,12630,08833,99333,541118$102.13$2.94
Apr 20262073141721720$100.32$2.77
Mar 202611,32511,23111,43611,4160$91.38$3.04
Feb 202610,95111,0279,4909,4720$64.51$3.62
Jan 202611,84511,84611,40911,142247$60.04$7.72
Dec 202512,12912,07912,08012,0590$57.97$4.26
Nov 202510,94411,28610,29010,2690$60.06$3.79
Oct 202512,05112,11210,75110,7240$60.89$3.19
Sep 202512,86612,68111,52711,5010$63.96$2.97
Aug 202512,85613,03810,43310,129279$64.86$2.91
Jul 202512,69312,6329,2699,2470$68.39$3.20
Jun 202510,22810,2217,7717,7530$68.17$3.02
May 202512,73312,4809,6529,6300$62.17$3.12
Apr 202512,51212,4338,4558,4360$63.54$3.42
Mar 202512,26112,3997,2157,17425$68.24$4.12
Feb 202512,08612,0726,8336,8160$71.53$4.19
Jan 202513,89213,8268,1598,1390$75.74$4.13
Dec 202414,88314,9219,1489,1280$70.12$3.01
Nov 202413,74213,6548,2678,2490$69.95$2.12
Oct 202412,74812,7737,7677,7510$71.99$2.20
Sep 202411,41511,5159,0869,0690$70.24$2.28
Aug 202411,99511,9066,6256,6130$76.68$1.99
Jul 20247,4987,4193,4393,4320$81.80$2.07
Jun 20244,6144,6403,4163,4100$79.77$2.54
May 20242,4062,3805,3065,27321$80.02$2.12
Apr 20249489511,6421,6390$85.35$1.60
Mar 20249269822,1192,1160$81.28$1.49
Feb 20245,5295,6115,3425,3340$77.25$1.72
Jan 202412,25312,29511,80811,7820$74.15$3.18
Dec 202312,53912,43314,01713,9840$71.90$2.52
Nov 202313,01213,02411,90311,8750$77.69$2.71
Oct 202313,53213,70112,37512,31031$85.64$2.98
Sep 202311,29711,0859,3759,3500$89.43$2.64
Aug 202313,34713,52711,50411,4690$81.39$2.58

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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