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Producing

TUMBLER STATE C

Tumbler State C is an oil lease in Reeves County, Texas, operated by U.S. Energy Development Corp in the Wolfbone (Trend Area) field.

1 well

10,916bbl oil, last 12 months−34% vs prior year
Operator
U.S. Energy Development Corp
County
Reeves County
Field
Wolfbone (Trend Area)
RRC lease
08-53102

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Where it sits

This county

Reeves CountyReevesWinklerWardLovingReeves County
Reeves County
Gas, last 12 months
81,920 mcf
Oil in Jul 2026
764 bbl

Checks stopped on this lease?

  • Operator

    Operator changed: U.S. Energy Development Corp took over from Cog Operating LLC in Apr 2025.

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

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Production by month

Oil output fell 34% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 34% over the last 12 monthsMonthly oil production and gas for TUMBLER STATE C, Aug 2023 to Jul 2026. Oil output fell 34% over the last 12 months. 10,916 bbl in the 12 months through Jul 2026, against 16,515 bbl in the 12 months before.Last 12 months: 10,916 bblbbl per monthmcf per month005002,5001,0005,0001,5007,5002,00010k2,50012.5kOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 34% over the last 12 monthsMonthly oil production and gas for TUMBLER STATE C, Aug 2023 to Jul 2026. Oil output fell 34% over the last 12 months. 10,916 bbl in the 12 months through Jul 2026, against 16,515 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month005002,5001,0005,0001,5007,5002,00010k2,50012.5kJan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

Since Apr 2025 the lease's gas goes to a transmission line instead of a processing plant

Flaring peaked at 3.5% of the gas in Jun 2026.

  • Processing plant (3)
  • Transmission line (2)
  • Flared (4)
Since Apr 2025 the lease's gas goes to a transmission line instead of a processing plantShare of TUMBLER STATE C gas by disposition code each month, Aug 2023 to Jul 2026. Since Apr 2025 the lease's gas goes to a transmission line instead of a processing plant. Flaring peaked at 3.5% of the gas in Jun 2026.Share of the lease’s gas by disposition code, per month0%50%100%Apr 2025: plant to lineFlared 3.5%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Since Apr 2025 the lease's gas goes to a transmission line instead of a processing plantShare of TUMBLER STATE C gas by disposition code each month, Aug 2023 to Jul 2026. Since Apr 2025 the lease's gas goes to a transmission line instead of a processing plant. Flaring peaked at 3.5% of the gas in Jun 2026.Share of gas by disposition code0%50%100%Apr 25: plant to lineFlared 3.5%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Transmission line (2)

    100% · 81,526 mcf

  • Flared (4)

    0.5% · 394 mcf

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

Who has run this lease

The operator changed once, most recently in Apr 2025

Operators of this lease over timeCog Operating LLC, Jan 2020 to Mar 2025; U.S. Energy Development Corp, Apr 2025 to Jul 20262020202120222023202420252026Changed Apr 2025Cog Operating LLCJan 2020 to Mar 2025U.S. Energy Development CorpApr 2025 to now
Operators of this lease over timeCog Operating LLC, Jan 2020 to Mar 2025; U.S. Energy Development Corp, Apr 2025 to Jul 20262020202120222023202420252026Changed Apr 2025Cog Operating LLCJan 2020 to Mar 2025U.S. Energy Development CorpApr 2025 to now

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

1 well on this lease

Wells on TUMBLER STATE C
API numberWell no.Status
42-389-376671804HRActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Oryx Delaware Oil Transport LLCOilGathers100Jan 1, 2020–
Kinetik Holdings LPCasinghead gasBuys100Apr 1, 2025–
Kinetik Holdings LPCasinghead gasGathers100Apr 1, 2025–
Eagleclaw Midstream Ventures,llcCasinghead gasGathers100Aug 21, 2019Jan 1, 2020
Eagleclaw Midstream Ventures,llcCasinghead gasBuys100Aug 21, 2019Jan 1, 2020
Oryx So. Delaware Ogt LLCOilGathers100Aug 21, 2019Jan 1, 2020

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

Who buys my oilOil price check

856.58 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 Tumbler State C
API numberWell no.Acreson the permit
42-389-376671804HR856.58

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

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Estimate your royalty

36 months, newest first

Ledger for TUMBLER STATE C
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 2026U.S. Energy7647415,2385,114124$80.46$2.89
Jun 2026U.S. Energy6526374,3814,226155$84.81$3.15
May 2026U.S. Energy8158535,4965,46927$102.13$2.94
Apr 2026U.S. Energy9629566,5226,5220$100.32$2.77
Mar 2026U.S. Energy1,0381,0245,7525,7520$91.38$3.04
Feb 2026U.S. Energy9909986,4716,4710$64.51$3.62
Jan 2026U.S. Energy1,0109985,9165,9160$60.04$7.72
Dec 2025U.S. Energy1,0701,0607,3567,3560$57.97$4.26
Nov 2025U.S. Energy9439449,0139,0130$60.06$3.79
Oct 2025U.S. Energy9058989,2689,2680$60.89$3.19
Sep 2025U.S. Energy8999729,3309,3300$63.96$2.97
Aug 2025U.S. Energy8688307,1777,08988$64.86$2.91
Jul 2025U.S. Energy8549188,2258,2250$68.39$3.20
Jun 2025U.S. Energy1,5041,5039,7769,7760$68.17$3.02
May 2025U.S. Energy1,7431,7908,7858,7850$62.17$3.12
Apr 2025U.S. Energy2,0232,0535,1135,1130$63.54$3.42
Mar 2025Cog Operating1,6821,6444,5094,5090$68.24$4.12
Feb 2025Cog Operating1,2721,2178,1867,951235$71.53$4.19
Jan 2025Cog Operating1,3861,4178,2478,2470$75.74$4.13
Dec 2024Cog Operating9869766,7506,7500$70.12$3.01
Nov 2024Cog Operating1,2231,2389,3439,3430$69.95$2.12
Oct 2024Cog Operating1,5001,45610,88210,8820$71.99$2.20
Sep 2024Cog Operating1,0971,1078,0728,0720$70.24$2.28
Aug 2024Cog Operating1,2451,2128,1568,1560$76.68$1.99
Jul 2024Cog Operating1,2351,2758,0128,0120$81.80$2.07
Jun 2024Cog Operating1,3231,2577,8227,8220$79.77$2.54
May 2024Cog Operating7518175,2405,2400$80.02$2.12
Apr 2024Cog Operating9158866,1626,1620$85.35$1.60
Mar 2024Cog Operating1,1181,2849,7009,7000$81.28$1.49
Feb 2024Cog Operating1,7411,7124,0344,0340$77.25$1.72
Jan 2024Cog Operating2,1622,1093,7873,7870$74.15$3.18
Dec 2023Cog Operating1,3661,3693,5353,5350$71.90$2.52
Nov 2023Cog Operating1,4521,4014,0884,0880$77.69$2.71
Oct 2023Cog Operating1,7501,7384,3254,3250$85.64$2.98
Sep 2023Cog Operating1,7761,8144,3674,3670$89.43$2.64
Aug 2023Cog Operating1,7291,7233,7223,7220$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

OperatorU.S. Energy Development CorpFieldWolfbone (Trend Area)CountyReeves County

U.S. Energy Development Corp in Reeves County

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Wolfbone (Trend Area) field

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