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Texas oil lease

Producing

GUAJILLO UNIT 12 NORTH

Guajillo Unit 12 North is an oil lease in Live Oak County, Texas, operated by Marathon Oil Ef LLC in the Eagleville (Eagle Ford-2) field.

4 wells

11,944bbl oil, last 12 months−54% vs prior year
Operator
Marathon Oil Ef LLC
County
Live Oak County
Field
Eagleville (Eagle Ford-2)
RRC lease
02-11331

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Where it sits

This county

Live Oak CountyLive OakAtascosaGoliadMcMullenKarnesSan PatricioBeeLive Oak County
Live Oak County
Gas, last 12 months
10,116 mcf
Oil in Jul 2026
1,029 bbl

Production by month

Oil output fell 54% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 54% over the last 12 monthsMonthly oil production and gas for GUAJILLO UNIT 12 NORTH, Aug 2023 to Jul 2026. Oil output fell 54% over the last 12 months. 11,944 bbl in the 12 months through Jul 2026, against 25,924 bbl in the 12 months before.Last 12 months: 11,944 bblbbl per monthmcf per month001,0001,0002,0002,0003,0003,0004,0004,000Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 54% over the last 12 monthsMonthly oil production and gas for GUAJILLO UNIT 12 NORTH, Aug 2023 to Jul 2026. Oil output fell 54% over the last 12 months. 11,944 bbl in the 12 months through Jul 2026, against 25,924 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month001,0001,0002,0002,0003,0003,0004,0004,000Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

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

Flaring peaked at 11.9% of the gas in Sep 2023.

  • Processing plant (3)
  • Lease fuel (1)
  • Flared (4)
Since Mar 2024 the lease's gas goes to a processing plant instead of lease fuelShare of GUAJILLO UNIT 12 NORTH gas by disposition code each month, Aug 2023 to Jul 2026. Since Mar 2024 the lease's gas goes to a processing plant instead of lease fuel. Flaring peaked at 11.9% of the gas in Sep 2023.Share of the lease’s gas by disposition code, per month0%50%100%Mar 2024: fuel to plantFlared 11.9%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Since Mar 2024 the lease's gas goes to a processing plant instead of lease fuelShare of GUAJILLO UNIT 12 NORTH gas by disposition code each month, Aug 2023 to Jul 2026. Since Mar 2024 the lease's gas goes to a processing plant instead of lease fuel. Flaring peaked at 11.9% of the gas in Sep 2023.Share of gas by disposition code0%50%100%Mar 24: fuel to plantFlared 11.9%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Processing plant (3)

    69% · 7,001 mcf

  • Lease fuel (1)

    28% · 2,875 mcf

  • Flared (4)

    2.4% · 240 mcf

2.4% of the gas flared in the last 12 months. 12 months above 3%.

4 wells on this lease

Wells on GUAJILLO UNIT 12 NORTH
API numberWell no.Status
42-297-358531HActive
42-297-358542HActive
42-297-358553HActive
42-297-358564HActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Harvest Midstream CompanyOilGathers20Jul 1, 2022–
Reynolds Energy Transport LLCOilGathers20Jul 1, 2022–
Shell Trading (Us) CompanyOilGathers20Jul 1, 2022–
Statewide Crude Inc.OilGathers20Jul 1, 2022–
Valero Marketing and Supply Co.OilGathers20Jul 1, 2022–
Marathon Oil Ef LLCCasinghead gasBuys100Mar 26, 2017–
Marathon Oil Ef LLCCasinghead gasGathers100Mar 26, 2017–
Gulfmark Energy, Inc.OilGathers15Mar 26, 2017Jul 1, 2022
Harvest Midstream CompanyOilGathers5Sep 1, 2018Jul 1, 2022
Marathon Oil Ef LLCOilGathers1Mar 26, 2017Jul 1, 2022
Shell Trading (Us) CompanyOilGathers3Mar 26, 2017Jul 1, 2022
Statewide Crude Inc.OilGathers5Mar 26, 2017Jul 1, 2022
Valero Marketing and Supply Co.OilGathers71Mar 26, 2017Jul 1, 2022

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

Who buys my oilOil price check

188.26 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 Guajillo Unit 12 North
API numberWell no.Acreson the permit
42-297-358531H188.26
42-297-358542H188.26
42-297-358553H188.26
42-297-358564H188.26

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

Unit decimal checker

What ConocoPhillips told investors it received

Marathon Oil Ef LLC is linked to ConocoPhillips (MRO).
Realized prices reported by ConocoPhillips
QuarterOil$ per bblFiling
Q2 2026$99.40SEC filing
Q1 2026$73.47SEC filing
Q3 2025$66.13SEC filing
Q2 2025$64.23SEC filing
Q1 2025$71.65SEC filing

SourceConocoPhillips quarterly reports, SEC EDGAR, company-wide averages before hedging.

Estimate your royalty

36 months, newest first

Ledger for GUAJILLO UNIT 12 NORTH
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 20261,0291,0263762465$80.46$2.89
Jun 20267977862681793$84.81$3.15
May 20264534752371654$102.13$2.94
Apr 20261,3181,3386774846$100.32$2.77
Mar 20261,3931,36047732510$91.38$3.04
Feb 20266336223802705$64.51$3.62
Jan 20266005997755445$60.04$7.72
Dec 20257047155544004$57.97$4.26
Nov 20251,6931,6851,4691,02452$60.06$3.79
Oct 20259939911,8901,38927$60.89$3.19
Sep 20257887941,09375737$63.96$2.97
Aug 20251,5431,5501,9201,21882$64.86$2.91
Jul 20251,9331,9251,53796029$68.39$3.20
Jun 20251,5241,5282,2251,34661$68.17$3.02
May 20251,7861,8002,5951,58366$62.17$3.12
Apr 20252,0392,0332,2251,40045$63.54$3.42
Mar 20253,0743,0632,5441,65252$68.24$4.12
Feb 20251,8141,8191,7581,14622$71.53$4.19
Jan 20252,0322,0211,13073136$75.74$4.13
Dec 20242,8202,8181,5021,01329$70.12$3.01
Nov 20242,3242,3221,8131,27432$69.95$2.12
Oct 20242,7162,7172,1331,57234$71.99$2.20
Sep 20241,8391,8431,8071,38029$70.24$2.28
Aug 20242,0232,0212,5501,97226$76.68$1.99
Jul 20242,1642,1661,5891,25314$81.80$2.07
Jun 20242,4682,4881,6821,24528$79.77$2.54
May 20242,9522,9492,6771,48169$80.02$2.12
Apr 20242,8642,8632,2131,11778$85.35$1.60
Mar 20242,8622,8542,2341,29625$81.28$1.49
Feb 20242,6572,6602,860369104$77.25$1.72
Jan 20242,4142,4152,928249145$74.15$3.18
Dec 20232,2032,2062,5060126$71.90$2.52
Nov 20232,7912,7803,7581,114142$77.69$2.71
Oct 20232,3812,3813,7761,025196$85.64$2.98
Sep 20232,2262,2302,65348316$89.43$2.64
Aug 20232,7002,6993,6751,063131$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

OperatorMarathon Oil Ef LLCFieldEagleville (Eagle Ford-2)CountyLive Oak County

Marathon Oil Ef LLC in Live Oak County

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Eagleville (Eagle Ford-2) field

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