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Texas oil lease

Producing

DUKE RANCH -18-

Duke Ranch -18- is an oil lease in Goliad County, Texas, operated by T-C Oil Company, LLC in the Tejas (Frio 5400) field.

1 well

32,600bbl oil, last 12 months
Operator
T-C Oil Company, LLC
County
Goliad County
Field
Tejas (Frio 5400)
RRC lease
02-12984

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Where it sits

This county

Goliad CountyGoliadWilsonRefugioKarnesDe WittVictoriaBeeLive OakGoliad County
Goliad County
Gas, last 12 months
4,821 mcf
Oil in Jul 2026
4,376 bbl

Production by month

Oil output rose 343% since Jun 2025

  • Oil (bars)
  • Gas (line)
Oil output rose 343% since Jun 2025Monthly oil production and gas for DUKE RANCH -18-, Jun 2025 to Jul 2026. Oil output rose 343% since Jun 2025. Monthly average of 4,252 bbl in the latest 3 months, against 959 bbl in the first 3.bbl per monthmcf per month001,0002502,0005003,0007504,0001,0005,0001,250Jul 25OctJan 26AprJul
Oil output rose 343% since Jun 2025Monthly oil production and gas for DUKE RANCH -18-, Jun 2025 to Jul 2026. Oil output rose 343% since Jun 2025. Monthly average of 4,252 bbl in the latest 3 months, against 959 bbl in the first 3.bbl per monthmcf per month001,0002502,0005003,0007504,0001,0005,0001,250Jul 25Jan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

Since Jun 2026 the lease's gas goes to a transmission line instead of lease fuel

  • Transmission line (2)
  • Lease fuel (1)
Since Jun 2026 the lease's gas goes to a transmission line instead of lease fuelShare of DUKE RANCH -18- gas by disposition code each month, Jun 2025 to Jul 2026. Since Jun 2026 the lease's gas goes to a transmission line instead of lease fuel.Share of the lease’s gas by disposition code, per month0%50%100%Jun 2026: fuel to lineJul 25OctJan 26AprJul
Since Jun 2026 the lease's gas goes to a transmission line instead of lease fuelShare of DUKE RANCH -18- gas by disposition code each month, Jun 2025 to Jul 2026. Since Jun 2026 the lease's gas goes to a transmission line instead of lease fuel.Share of gas by disposition code0%50%100%Jun 26: fuel to lineJul 25Jan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Lease fuel (1)

    57% · 2,755 mcf

  • Transmission line (2)

    43% · 2,065 mcf

1 well on this lease

Wells on DUKE RANCH -18-
API numberWell no.Status
42-175-342771Active

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Gulfmark Energy, Inc.OilGathers75Jun 1, 2026–
Martin Crude Marketing Co.OilGathers25Jun 1, 2026–
Kinder Morgan Texas Pipeline LLCCasinghead gasBuys100Jun 3, 2025–
Kinder Morgan Texas Pipeline LLCCasinghead gasGathers100Jun 3, 2025–
Gulfmark Energy, Inc.OilGathers100Jun 3, 2025Jun 1, 2026

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

Who buys my oilOil price check

40 acres on the newest permit

Check your decimal on this lease
Permits for Duke Ranch -18-
API numberWell no.Acreson the permit
42-175-34277140

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

Unit decimal checker

Estimate your royalty

14 months, newest first

Ledger for DUKE RANCH -18-
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 20264,3764,7831,1401,1080$80.46$2.89
Jun 20264,3244,0009959570$84.81$3.15
May 20264,0573,69233500$102.13$2.94
Apr 20263,2423,62727800$100.32$2.77
Mar 20263,7063,35126100$91.38$3.04
Feb 20263,3533,63016000$64.51$3.62
Jan 20263,4443,31020800$60.04$7.72
Dec 20251,2961,3199700$57.97$4.26
Nov 20251,0211,1006600$60.06$3.79
Oct 20251,5711,3526100$60.89$3.19
Sep 20251,1031,19560000$63.96$2.97
Aug 20251,10794462000$64.86$2.91
Jul 20251,1151,10062000$68.39$3.20
Jun 20256565594344310$68.17$3.02

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

OperatorT-C Oil Company, LLCFieldTejas (Frio 5400)CountyGoliad County

T-C Oil Company, LLC in Goliad County

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Tejas (Frio 5400) field

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