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DERBY SOUTH C

Derby South C is an oil lease in Frio County, Texas, operated by Trinity Operating (Usg), LLC in the Eagleville (Eagle Ford-1) field.

3 wells

13,576bbl oil, last 12 months−25% vs prior year
Operator
Trinity Operating (Usg), LLC
County
Frio County
Field
Eagleville (Eagle Ford-1)
RRC lease
01-19955

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Where it sits

This county

Frio CountyFrioZavalaAtascosaUvaldeMedinaBexarFrio County
Frio County
Gas, last 12 months
56,662 mcf
Oil in Jul 2026
939 bbl

Production by month

Oil output fell 25% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 25% over the last 12 monthsMonthly oil production and gas for DERBY SOUTH C, Aug 2023 to Jul 2026. Oil output fell 25% over the last 12 months. 13,576 bbl in the 12 months through Jul 2026, against 18,022 bbl in the 12 months before.Last 12 months: 13,576 bblbbl per monthmcf per month005002,0001,0004,0001,5006,0002,0008,0002,50010kOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 25% over the last 12 monthsMonthly oil production and gas for DERBY SOUTH C, Aug 2023 to Jul 2026. Oil output fell 25% over the last 12 months. 13,576 bbl in the 12 months through Jul 2026, against 18,022 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month005002,0001,0004,0001,5006,0002,0008,0002,50010kJan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

Since Apr 2024 the lease's gas goes to a processing plant instead of lease fuel

Flaring peaked at 91.5% of the gas in Jun 2025.

  • Processing plant (3)
  • Lease fuel (1)
  • Flared (4)
Since Apr 2024 the lease's gas goes to a processing plant instead of lease fuelShare of DERBY SOUTH C gas by disposition code each month, Aug 2023 to Jul 2026. Since Apr 2024 the lease's gas goes to a processing plant instead of lease fuel. Flaring peaked at 91.5% of the gas in Jun 2025.Share of the lease’s gas by disposition code, per month0%50%100%Apr 2024: fuel to plantFlared 91.5%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Since Apr 2024 the lease's gas goes to a processing plant instead of lease fuelShare of DERBY SOUTH C gas by disposition code each month, Aug 2023 to Jul 2026. Since Apr 2024 the lease's gas goes to a processing plant instead of lease fuel. Flaring peaked at 91.5% of the gas in Jun 2025.Share of gas by disposition code0%50%100%Apr 24: fuel to plantFlared 91.5%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Flared (4)

    41% · 23,449 mcf

  • Processing plant (3)

    30% · 16,976 mcf

  • Lease fuel (1)

    29% · 16,237 mcf

41.4% of the gas flared in the last 12 months. 35 months above 3%.

3 wells on this lease

Wells on DERBY SOUTH C
API numberWell no.Status
42-163-34166110HActive
42-163-34167111HActive
42-163-34168112HActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Enterprise Crude Oil LLCOilGathers100Dec 31, 2023–
Eastex Crude Company, LLCOilGathers100Jul 1, 2023Dec 31, 2023
Rio Energy International, Inc.OilGathers100Apr 1, 2023Jul 1, 2023
Apricus Enterprises, LLCOilGathers100Feb 14, 2023Apr 1, 2023
Pilot Travel Centers LLCOilGathers100Jan 6, 2023Feb 14, 2023
Bp Products North America Inc.OilGathers100Jul 1, 2022Jan 6, 2023
Plains Marketing, L.p.OilGathers100Jan 1, 2022Jul 1, 2022

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

Who buys my oilOil price check

440 acres on the newest permit

  • 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 Derby South C
API numberWell no.Acreson the permit
42-163-34166110H440
42-163-34167111H440
42-163-34168112H440

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

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36 months, newest first

Ledger for DERBY SOUTH C
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 20269399003,7282722,843$80.46$2.89
Jun 20268931,0213,2876371,436$84.81$3.15
May 20261,0251,2103,5951,2291,051$102.13$2.94
Apr 20261,0739363,9052,054120$100.32$2.77
Mar 20261,0358984,1647682,987$91.38$3.04
Feb 20261,0511,1014,4441,1891,062$64.51$3.62
Jan 20261,1421,1534,3271853,891$60.04$7.72
Dec 20251,5921,6225,1181,6821,680$57.97$4.26
Nov 20251,0691,1405,3552,460835$60.06$3.79
Oct 20251,1851,2046,0192,8431,280$60.89$3.19
Sep 20251,3701,2746,3442,628987$63.96$2.97
Aug 20251,2021,2396,3761,0295,277$64.86$2.91
Jul 20251,5041,7296,7964,603572$68.39$3.20
Jun 20251,7351,6286,9275896,338$68.17$3.02
May 20251,6301,5657,1792,0332,568$62.17$3.12
Apr 20251,6111,5097,1721,7553,552$63.54$3.42
Mar 20251,5271,7716,7884,616218$68.24$4.12
Feb 20251,2911,1736,3374,100634$71.53$4.19
Jan 20251,1771,1515,9473,801770$75.74$4.13
Dec 20241,2021,3767,6695,067235$70.12$3.01
Nov 20241,6221,4806,8294,157274$69.95$2.12
Oct 20241,5931,9027,7764,758305$71.99$2.20
Sep 20241,4421,1956,9514,278323$70.24$2.28
Aug 20241,6881,7897,4964,362286$76.68$1.99
Jul 20241,5361,6397,8584,011412$81.80$2.07
Jun 20241,5571,2587,2926,303291$79.77$2.54
May 20241,6421,6057,9534,7091,374$80.02$2.12
Apr 20241,7481,7967,6034,846649$85.35$1.60
Mar 20241,7721,8097,11002,095$81.28$1.49
Feb 20241,8761,7466,4663,750491$77.25$1.72
Jan 20241,9872,0236,6403,230662$74.15$3.18
Dec 20231,9912,1716,8183,868423$71.90$2.52
Nov 20232,0622,1047,0464,243662$77.69$2.71
Oct 20231,8361,7236,2352,5151,596$85.64$2.98
Sep 20231,7601,8397,8994,14499$89.43$2.64
Aug 20231,9562,7167,9093,559598$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

OperatorTrinity Operating (Usg), LLCFieldEagleville (Eagle Ford-1)CountyFrio County

Trinity Operating (Usg), LLC in Frio County

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