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Texas oil lease

Producing

UL MASON EAST C

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

1 well

10,926bbl oil, last 12 months−20% vs prior year
Operator
Diamondback E&P LLC
County
Andrews County
Field
Spraberry (Trend Area)
RRC lease
08-52055

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Where it sits

This county

Andrews CountyAndrewsMartinGainesDawsonAndrews County
Andrews County
Gas, last 12 months
13,580 mcf
Oil in Jul 2026
776 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 20% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 20% over the last 12 monthsMonthly oil production and gas for UL MASON EAST C, Aug 2023 to Jul 2026. Oil output fell 20% over the last 12 months. 10,926 bbl in the 12 months through Jul 2026, against 13,596 bbl in the 12 months before.Last 12 months: 10,926 bblbbl per monthmcf per month001,0002,0002,0004,0003,0006,0004,0008,000Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 20% over the last 12 monthsMonthly oil production and gas for UL MASON EAST C, Aug 2023 to Jul 2026. Oil output fell 20% over the last 12 months. 10,926 bbl in the 12 months through Jul 2026, against 13,596 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month001,0002,0002,0004,0003,0006,0004,0008,000Jan 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 3.2% 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 C 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 3.2% of the gas in Aug 2025.Share of the lease’s gas by disposition code, per month0%50%100%Flared 3.2%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
99% of the gas went to a transmission line in the last 12 monthsShare of UL MASON EAST C 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 3.2% of the gas in Aug 2025.Share of gas by disposition code0%50%100%Flared 3.2%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Transmission line (2)

    99% · 13,926 mcf

  • Lease fuel (1)

    0.5% · 77 mcf

  • Flared (4)

    0.4% · 55 mcf

0.4% of the gas flared in the last 12 months. One month above 3%.

1 well on this lease

Wells on UL MASON EAST C
API numberWell no.Status
42-003-4781515MSActive

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

241.34 acres on the newest permit

  • Worth asking

    An allocation well is on this lease

    A well drilled across several tracts shares its production by an allocation formula, so the decimal is not always your acres over the unit acres. Ask the operator for the allocation formula and the tract factor for your land.

  • 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 C
API numberWell no.Acreson the permit
42-003-4781515MS241.34

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 EAST C
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 202677677094791917$80.46$2.89
Jun 20264384044744644$84.81$3.15
May 2026010000$102.13$2.94
Apr 20269921,0001,5951,5830$100.32$2.77
Mar 20261,2431,2401,6901,6830$91.38$3.04
Feb 20265976188178130$64.51$3.62
Jan 20261,0009891,4741,45611$60.04$7.72
Dec 20251,3571,3761,7841,7760$57.97$4.26
Nov 20251,2331,2181,4121,4060$60.06$3.79
Oct 20251,2061,1881,4591,4530$60.89$3.19
Sep 20251,2371,2321,2091,2040$63.96$2.97
Aug 202584785471969323$64.86$2.91
Jul 20255315304784760$68.39$3.20
Jun 20258458417847764$68.17$3.02
May 20256026143813790$62.17$3.12
Apr 20256936782842830$63.54$3.42
Mar 20254634603653630$68.24$4.12
Feb 202560731941930$71.53$4.19
Jan 20255615591,7331,7260$75.74$4.13
Dec 20241,6521,7165,7345,7130$70.12$3.01
Nov 20241,8291,7845,8195,7970$69.95$2.12
Oct 20242,0882,1546,7976,7720$71.99$2.20
Sep 20242,1702,1026,8476,8190$70.24$2.28
Aug 20242,1022,1117,4167,3850$76.68$1.99
Jul 20242,2552,3076,9696,9370$81.80$2.07
Jun 20241,9931,9286,1666,08254$79.77$2.54
May 20242,1572,1677,3837,32620$80.02$2.12
Apr 20242,1782,2037,1957,1620$85.35$1.60
Mar 20242,3482,3326,8026,7710$81.28$1.49
Feb 20241,9101,9145,4205,3800$77.25$1.72
Jan 20242,1912,2106,2876,18751$74.15$3.18
Dec 20232,3882,3615,7235,6800$71.90$2.52
Nov 20232,7522,7326,7346,6900$77.69$2.71
Oct 20238619212,3452,30027$85.64$2.98
Sep 20232,2262,1815,9125,8730$89.43$2.64
Aug 20232,3132,3145,9445,9070$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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Nearby

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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