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Texas oil lease

Producing

FORTRESS A1

Fortress A1 is an oil lease in Martin County, Texas, operated by Diamondback E&P LLC in the Spraberry (Trend Area) field.

2 wells

7,120bbl oil, last 12 months−12% vs prior year
Operator
Diamondback E&P LLC
County
Martin County
Field
Spraberry (Trend Area)
RRC lease
08-52282

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Where it sits

This county

Martin CountyMartinGainesAndrewsHowardDawsonBordenMartin County
Martin County
Gas, last 12 months
62,070 mcf
Oil in Jul 2026
581 bbl

Checks stopped on this lease?

  • Buyer

    Buyer changed: ENTERPRISE M B MIDSTREAM LLC replaced ENT NAVITAS MDSTRM MDLND BAS LLC, ET GATHERING & PROCESSING LLC as the buyer of this lease's gas from oil wells on Aug 1, 2025.

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

See why checks stop on this lease

Production by month

Oil output fell 12% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 12% over the last 12 monthsMonthly oil production and gas for FORTRESS A1, Aug 2023 to Jul 2026. Oil output fell 12% over the last 12 months. 7,120 bbl in the 12 months through Jul 2026, against 8,064 bbl in the 12 months before.Last 12 months: 7,120 bblbbl per monthmcf per month002502,0005004,0007506,0001,0008,0001,25010kOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 12% over the last 12 monthsMonthly oil production and gas for FORTRESS A1, Aug 2023 to Jul 2026. Oil output fell 12% over the last 12 months. 7,120 bbl in the 12 months through Jul 2026, against 8,064 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month002502,0005004,0007506,0001,0008,0001,25010kJan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

95% of the gas went to a transmission line in the last 12 months

Flaring peaked at 15.3% of the gas in Jun 2026.

  • Transmission line (2)
  • Lease fuel (1)
  • Flared (4)
95% of the gas went to a transmission line in the last 12 monthsShare of FORTRESS A1 gas by disposition code each month, Aug 2023 to Jul 2026. 95% of the gas went to a transmission line in the last 12 months. Flaring peaked at 15.3% of the gas in Jun 2026.Share of the lease’s gas by disposition code, per month0%50%100%Flared 15.3%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
95% of the gas went to a transmission line in the last 12 monthsShare of FORTRESS A1 gas by disposition code each month, Aug 2023 to Jul 2026. 95% of the gas went to a transmission line in the last 12 months. Flaring peaked at 15.3% of the gas in Jun 2026.Share of gas by disposition code0%50%100%Flared 15.3%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Transmission line (2)

    95% · 59,065 mcf

  • Flared (4)

    4.6% · 2,853 mcf

  • Lease fuel (1)

    0.2% · 152 mcf

4.6% of the gas flared in the last 12 months. 8 months above 3%.

Who has run this lease

The operator changed once, most recently in Oct 2021

Operators of this lease over timeQep Energy Company, Jan 2020 to Sep 2021; Diamondback E&P LLC, Oct 2021 to Jul 20262020202120222023202420252026Changed Oct 2021Qep Energy CompanyJan 2020 to Sep 2021Diamondback E&P LLCOct 2021 to now
Operators of this lease over timeQep Energy Company, Jan 2020 to Sep 2021; Diamondback E&P LLC, Oct 2021 to Jul 20262020202120222023202420252026Changed Oct 2021Qep Energy CompanyJan 2020 to Sep 2021Diamondback E&P LLCOct 2021 to now

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

2 wells on this lease

Wells on FORTRESS A1
API numberWell no.Status
42-317-4159308WAActive
42-317-4159507MMActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Valero Marketing and Supply Co.OilGathers100Apr 26, 2023–
Enterprise M B Midstream LLCCasinghead gasBuys100Aug 1, 2025–
Enterprise Products Operating LLCCasinghead gasGathers100Aug 1, 2025–
Brazos Midstream Operating, LLCCasinghead gasGathers100Apr 26, 2023Aug 1, 2025
Ent Navitas Mdstrm Mdlnd Bas LLCCasinghead gasBuys50Apr 26, 2023Aug 1, 2025
Et Gathering & Processing LLCCasinghead gasBuys50Oct 1, 2023Aug 1, 2025
Etc Texas P/L, LTDCasinghead gasBuys50Apr 26, 2023Oct 1, 2023
Qep Energy CompanyCasinghead gasGathers100Apr 7, 2019Apr 26, 2023
Etc Texas P/L, LTDCasinghead gasBuys55Apr 7, 2019Apr 26, 2023

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

Who buys my oilOil price check

534.51 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 Fortress A1
API numberWell no.Acreson the permit
42-317-4159308WA534.51
42-317-4159507MM534.51

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 FORTRESS A1
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 2026Diamondback E&P5815816,5716,52629$80.46$2.89
Jun 2026Diamondback E&P5645656,1805,218948$84.81$3.15
May 2026Diamondback E&P6076065,6745,475185$102.13$2.94
Apr 2026Diamondback E&P5895914,2363,990235$100.32$2.77
Mar 2026Diamondback E&P5925893,7253,575140$91.38$3.04
Feb 2026Diamondback E&P5355375,1545,010131$64.51$3.62
Jan 2026Diamondback E&P4634744,2803,863404$60.04$7.72
Dec 2025Diamondback E&P4584485,0624,820229$57.97$4.26
Nov 2025Diamondback E&P5815846,8686,744109$60.06$3.79
Oct 2025Diamondback E&P5976334,7524,481259$60.89$3.19
Sep 2025Diamondback E&P7777405,2755,140124$63.96$2.97
Aug 2025Diamondback E&P7767814,2934,22360$64.86$2.91
Jul 2025Diamondback E&P6176103,5433,50826$68.39$3.20
Jun 2025Diamondback E&P6636653,4773,4635$68.17$3.02
May 2025Diamondback E&P6656632,9502,91131$62.17$3.12
Apr 2025Diamondback E&P6596583,9913,9772$63.54$3.42
Mar 2025Diamondback E&P8628593133102$68.24$4.12
Feb 2025Diamondback E&P754759000$71.53$4.19
Jan 2025Diamondback E&P898899000$75.74$4.13
Dec 2024Diamondback E&P1,0491,0441,0041,0010$70.12$3.01
Nov 2024Diamondback E&P4154154,1334,1201$69.95$2.12
Oct 2024Diamondback E&P5135125,4645,4456$71.99$2.20
Sep 2024Diamondback E&P4914914,9814,9609$70.24$2.28
Aug 2024Diamondback E&P4784785,5845,5710$76.68$1.99
Jul 2024Diamondback E&P4424426,8146,77127$81.80$2.07
Jun 2024Diamondback E&P3903937,1996,784399$79.77$2.54
May 2024Diamondback E&P4624594,6534,61824$80.02$2.12
Apr 2024Diamondback E&P4724714,4834,4702$85.35$1.60
Mar 2024Diamondback E&P4204204,3154,28817$81.28$1.49
Feb 2024Diamondback E&P3163194,3824,34328$77.25$1.72
Jan 2024Diamondback E&P4404374,2034,17418$74.15$3.18
Dec 2023Diamondback E&P4254244,3954,280106$71.90$2.52
Nov 2023Diamondback E&P4414424,2774,2672$77.69$2.71
Oct 2023Diamondback E&P4554594,7524,7368$85.64$2.98
Sep 2023Diamondback E&P5555525,5995,5873$89.43$2.64
Aug 2023Diamondback E&P7427445,7205,68823$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)CountyMartin County

Diamondback E&P LLC in Martin County

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Spraberry (Trend Area) field

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