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Texas oil lease

Producing

MARY K.

Mary K. is an oil lease in Hartley County, Texas, operated by High River Res Operating, LLC in the Lathem (Canyon Granite Wash) field.

1 well

5,833bbl oil, last 12 months−2% vs prior year
Operator
High River Res Operating, LLC
County
Hartley County
Field
Lathem (Canyon Granite Wash)
RRC lease
10-06579

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Where it sits

This county

Hartley CountyHartleyMooreShermanDallamHartley County
Hartley County
Oil in Jun 2026
476 bbl
Reporting since
Jan 2020

Checks stopped on this lease?

  • Operator

    Operator changed: High River Res Operating, LLC took over from Rio Petroleum, Inc. in Nov 2025.

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

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Production by month

Oil output held steady over the last 12 months

Jul 2026 was not reported.

  • Oil (bars)
  • Last 12 months
Oil output held steady over the last 12 monthsMonthly oil production for MARY K., Aug 2023 to Jul 2026. Oil output held steady over the last 12 months. 5,348 bbl in the 12 months through Jul 2026, against 5,468 bbl in the 12 months before.Last 12 months: 5,348 bblbbl per month0200400600800Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output held steady over the last 12 monthsMonthly oil production for MARY K., Aug 2023 to Jul 2026. Oil output held steady over the last 12 months. 5,348 bbl in the 12 months through Jul 2026, against 5,468 bbl in the 12 months before.Last 12 monthsbbl per month0200400600800Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

No gas disposition reported for this lease

The operator has not reported where the gas went in the months we hold.

Who has run this lease

The operator changed once, most recently in Nov 2025

Operators of this lease over timeRio Petroleum, Inc., Jan 2020 to Oct 2025; High River Res Operating, LLC, Nov 2025 to Jun 20262020202120222023202420252026Changed Nov 2025Rio Petroleum, Inc.Jan 2020 to Oct 2025High River Res Operating, LLCNov 2025 to now
Operators of this lease over timeRio Petroleum, Inc., Jan 2020 to Oct 2025; High River Res Operating, LLC, Nov 2025 to Jun 20262020202120222023202420252026Changed Nov 2025Rio Petroleum, Inc.Jan 2020 to Oct 2025High River Res Operating, LLCNov 2025 to now

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

1 well on this lease

Wells on MARY K.
API numberWell no.Status
42-205-301971123Active

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%From
Valero Marketing and Supply Co.OilGathers100Jan 1, 2003

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

Who buys my oilOil price check

160 acres on the newest permit

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Permits for Mary K.
API numberWell no.Acreson the permit
42-205-301971123160

SourceRailroad Commission drilling permits, Sep 26, 2026 (source 1, source 2).

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36 months, newest first

Ledger for MARY K.
MonthOil producedbblOil soldbblWTI$/bblHenry Hub$/MMBtu
Jul 2026No report––$80.46$2.89
Jun 2026High River476556$84.81$3.15
May 2026High River494533$102.13$2.94
Apr 2026High River509571$100.32$2.77
Mar 2026High River513544$91.38$3.04
Feb 2026High River433371$64.51$3.62
Jan 2026High River483365$60.04$7.72
Dec 2025High River515728$57.97$4.26
Nov 2025High River500433$60.06$3.79
Oct 2025Rio Petroleum,452559$60.89$3.19
Sep 2025Rio Petroleum,496378$63.96$2.97
Aug 2025Rio Petroleum,477379$64.86$2.91
Jul 2025Rio Petroleum,485561$68.39$3.20
Jun 2025Rio Petroleum,506559$68.17$3.02
May 2025Rio Petroleum,524521$62.17$3.12
Apr 2025Rio Petroleum,476358$63.54$3.42
Mar 2025Rio Petroleum,500554$68.24$4.12
Feb 2025Rio Petroleum,465759$71.53$4.19
Jan 2025Rio Petroleum,560383$75.74$4.13
Dec 2024Rio Petroleum,550332$70.12$3.01
Nov 2024Rio Petroleum,488706$69.95$2.12
Oct 2024Rio Petroleum,1260$71.99$2.20
Sep 2024Rio Petroleum,413377$70.24$2.28
Aug 2024Rio Petroleum,375543$76.68$1.99
Jul 2024Rio Petroleum,484366$81.80$2.07
Jun 2024Rio Petroleum,444374$79.77$2.54
May 2024Rio Petroleum,494564$80.02$2.12
Apr 2024Rio Petroleum,444514$85.35$1.60
Mar 2024Rio Petroleum,502379$81.28$1.49
Feb 2024Rio Petroleum,416382$77.25$1.72
Jan 2024Rio Petroleum,500556$74.15$3.18
Dec 2023Rio Petroleum,508573$71.90$2.52
Nov 2023Rio Petroleum,453380$77.69$2.71
Oct 2023Rio Petroleum,442537$85.64$2.98
Sep 2023Rio Petroleum,477374$89.43$2.64
Aug 2023Rio Petroleum,461738$81.39$2.58

No report filed

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

OperatorHigh River Res Operating, LLCFieldLathem (Canyon Granite Wash)CountyHartley County

High River Res Operating, LLC in Hartley County

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Lathem (Canyon Granite Wash) field

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