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Texas oil lease

Producing

THE SPHINX

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

8 wells

111,359bbl oil, last 12 months−23% vs prior year
Operator
U.S. Energy Development Corp
County
Reeves County
Field
Wolfbone (Trend Area)
RRC lease
08-49497

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Where it sits

This county

Reeves CountyReevesWinklerWardLovingReeves County
Reeves County
Gas, last 12 months
1,034,312 mcf
Oil in Jul 2026
7,212 bbl

Production by month

Oil output fell 23% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 23% over the last 12 monthsMonthly oil production and gas for THE SPHINX, Aug 2023 to Jul 2026. Oil output fell 23% over the last 12 months. 111,359 bbl in the 12 months through Jul 2026, against 144,262 bbl in the 12 months before.Last 12 months: 111,359 bblbbl per monthmcf per month005,00050k10k100k15k150k20k200kOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 23% over the last 12 monthsMonthly oil production and gas for THE SPHINX, Aug 2023 to Jul 2026. Oil output fell 23% over the last 12 months. 111,359 bbl in the 12 months through Jul 2026, against 144,262 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month005,00050k10k100k15k150k20k200kJan 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 3.1% of the gas in Dec 2025.

  • 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 THE SPHINX 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 3.1% of the gas in Dec 2025.Share of the lease’s gas by disposition code, per month0%50%100%Apr 2025: plant to lineFlared 3.1%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Since Apr 2025 the lease's gas goes to a transmission line instead of a processing plantShare of THE SPHINX 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 3.1% of the gas in Dec 2025.Share of gas by disposition code0%50%100%Apr 25: plant to lineFlared 3.1%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Transmission line (2)

    100% · 1,029,227 mcf

  • Flared (4)

    0.5% · 5,085 mcf

0.5% of the gas flared in the last 12 months. 2 months 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.

8 wells on this lease

Wells on THE SPHINX
API numberWell no.Status
42-389-35650701HActive
42-389-35874703HActive
42-389-36438751HActive
42-389-36439752HActive
42-389-36440702HActive
42-389-37204770HActive
42-389-37205772HActive
42-389-37206753HActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Brazos Midstream Operating, LLCOilGathers100Apr 1, 2025–
Brazos Midstream Operating, LLCCasinghead gasBuys100Apr 1, 2025–
Brazos Midstream Operating, LLCCasinghead gasGathers100Apr 1, 2025–
Brazos Midstream Operating, LLCOilGathers90Sep 1, 2020Apr 1, 2025
Enterprise Crude Oil LLCOilGathers5Sep 1, 2020Apr 1, 2025
Oasis Transp & Marketing Corp.OilGathers5Sep 1, 2020Apr 1, 2025
Brazos Midstream Operating, LLCCasinghead gasGathers100Nov 22, 2017Sep 1, 2020
Energy Transfer CompanyCasinghead gasBuys100Nov 22, 2017Sep 1, 2020
Brazos Midstream Operating, LLCOilGathers100Nov 22, 2017Sep 1, 2020

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

Who buys my oilOil price check

637.27 acres on the newest permit

8 wells are listed on this lease

Permits for The Sphinx
API numberWell no.Acreson the permit
42-389-37204770H637.27
42-389-37205772H637.27
42-389-37206753H637.27
42-389-36438751H637.27
42-389-36439752H637.27
42-389-36440702H637.27
42-389-35874703H637.27
42-389-35650701H637.27

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

Unit decimal checker

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36 months, newest first

Ledger for THE SPHINX
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 2026U.S. Energy7,2127,30677,11977,1190$80.46$2.89
Jun 2026U.S. Energy6,8936,64974,50974,109400$84.81$3.15
May 2026U.S. Energy7,2397,28571,34871,3480$102.13$2.94
Apr 2026U.S. Energy8,7798,92973,07373,0730$100.32$2.77
Mar 2026U.S. Energy10,03510,18277,73177,7310$91.38$3.04
Feb 2026U.S. Energy9,72110,14580,01880,0180$64.51$3.62
Jan 2026U.S. Energy7,8646,95465,01365,0130$60.04$7.72
Dec 2025U.S. Energy9,5279,49489,37586,5902,785$57.97$4.26
Nov 2025U.S. Energy10,71710,795100,030100,0300$60.06$3.79
Oct 2025U.S. Energy10,71010,582101,991100,2911,700$60.89$3.19
Sep 2025U.S. Energy11,30411,321110,180110,1800$63.96$2.97
Aug 2025U.S. Energy11,35811,333113,925113,725200$64.86$2.91
Jul 2025U.S. Energy13,60513,588139,750139,7500$68.39$3.20
Jun 2025U.S. Energy13,05313,028119,488119,4880$68.17$3.02
May 2025U.S. Energy14,47814,656120,230120,2300$62.17$3.12
Apr 2025U.S. Energy12,34012,440110,946108,1462,800$63.54$3.42
Mar 2025Cog Operating9,7369,810107,609107,6090$68.24$4.12
Feb 2025Cog Operating8,9238,90197,49297,4920$71.53$4.19
Jan 2025Cog Operating12,10812,100113,498113,4980$75.74$4.13
Dec 2024Cog Operating13,96913,739111,053111,0530$70.12$3.01
Nov 2024Cog Operating12,72812,89498,51798,5170$69.95$2.12
Oct 2024Cog Operating14,24314,276102,772102,7720$71.99$2.20
Sep 2024Cog Operating10,26110,44781,56181,5610$70.24$2.28
Aug 2024Cog Operating8,8188,77476,98976,9890$76.68$1.99
Jul 2024Cog Operating12,89912,88898,32998,3290$81.80$2.07
Jun 2024Cog Operating11,13511,07499,15698,946210$79.77$2.54
May 2024Cog Operating13,51813,396108,930108,9300$80.02$2.12
Apr 2024Cog Operating13,69014,144105,292105,2920$85.35$1.60
Mar 2024Cog Operating14,08813,833113,932113,9320$81.28$1.49
Feb 2024Cog Operating12,73512,58097,72597,7250$77.25$1.72
Jan 2024Cog Operating16,46216,426112,295112,2950$74.15$3.18
Dec 2023Cog Operating18,53118,453112,979111,9751,004$71.90$2.52
Nov 2023Cog Operating15,80815,75392,41992,4190$77.69$2.71
Oct 2023Cog Operating15,77516,20794,53794,5370$85.64$2.98
Sep 2023Cog Operating12,64312,66083,62481,0372,587$89.43$2.64
Aug 2023Cog Operating12,25712,27690,46990,4690$81.39$2.58

Flared above 3%

SourceTexas Railroad Commission Production Data Query, through Jul 2026. Prices: EIA, through Aug 2026. Updated Sep 28, 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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