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ANZALDUA OXFORD-MARTINEZ SA

Anzaldua Oxford-Martinez Sa is an oil lease in Karnes County, Texas, operated by Marathon Oil Ef LLC in the Eagleville (Eagle Ford-2) field.

1 well

12,508bbl oil, last 12 months−60% vs prior year
Operator
Marathon Oil Ef LLC
County
Karnes County
Field
Eagleville (Eagle Ford-2)
RRC lease
02-12420

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Where it sits

This county

Karnes CountyKarnesAtascosaGoliadWilsonGonzalesDe WittBexarKarnes County
Karnes County
Gas, last 12 months
24,491 mcf
Oil in Jul 2026
1,957 bbl

Production by month

Oil output fell 60% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 60% over the last 12 monthsMonthly oil production and gas for ANZALDUA OXFORD-MARTINEZ SA, Aug 2023 to Jul 2026. Oil output fell 60% over the last 12 months. 12,508 bbl in the 12 months through Jul 2026, against 30,945 bbl in the 12 months before.Last 12 months: 12,508 bblbbl per monthmcf per month002,0002,5004,0005,0006,0007,5008,00010k10k12.5kOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 60% over the last 12 monthsMonthly oil production and gas for ANZALDUA OXFORD-MARTINEZ SA, Aug 2023 to Jul 2026. Oil output fell 60% over the last 12 months. 12,508 bbl in the 12 months through Jul 2026, against 30,945 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month002,0002,5004,0005,0006,0007,5008,00010k10k12.5kJan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

75% of the gas went to a processing plant in the last 12 months

  • Processing plant (3)
  • Lease fuel (1)
  • Flared (4)
75% of the gas went to a processing plant in the last 12 monthsShare of ANZALDUA OXFORD-MARTINEZ SA gas by disposition code each month, Aug 2023 to Jul 2026. 75% of the gas went to a processing plant in the last 12 months.Share of the lease’s gas by disposition code, per month0%50%100%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
75% of the gas went to a processing plant in the last 12 monthsShare of ANZALDUA OXFORD-MARTINEZ SA gas by disposition code each month, Aug 2023 to Jul 2026. 75% of the gas went to a processing plant in the last 12 months.Share of gas by disposition code0%50%100%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Processing plant (3)

    75% · 24,511 mcf

  • Lease fuel (1)

    24% · 8,031 mcf

  • Flared (4)

    1.1% · 358 mcf

1.1% of the gas flared in the last 12 months. No month above 3%.

1 well on this lease

Wells on ANZALDUA OXFORD-MARTINEZ SA
API numberWell no.Status
42-255-375091HActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Endeavor Crude, LLCOilGathers25Jan 1, 2024–
Enterprise Crude Oil LLCOilGathers25Jan 1, 2024–
Genesis Crude Oil, L.p.OilGathers25Jan 1, 2024–
Statewide Crude Inc.OilGathers25Jan 1, 2024–
Marathon Oil Ef LLCCasinghead gasBuys100Jul 20, 2022–
Marathon Oil Ef LLCCasinghead gasGathers100Jul 20, 2022–
Dks Transport LLCOilGathers20Jul 20, 2022Jan 1, 2024
Enterprise Crude Oil LLCOilGathers20Jul 20, 2022Jan 1, 2024
Pilot Travel Centers LLCOilGathers20Jul 20, 2022Jan 1, 2024
Reynolds Energy Transport LLCOilGathers20Jul 20, 2022Jan 1, 2024
Trafigura Trading LLCOilGathers20Jul 20, 2022Jan 1, 2024

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

Who buys my oilOil price check

540.60 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 Anzaldua Oxford-Martinez Sa
API numberWell no.Acreson the permit
42-255-375091H540.60

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 ANZALDUA OXFORD-MARTINEZ SA
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 20261,9571,9221,7931,03320$80.46$2.89
Jun 202600000$84.81$3.15
May 202602000$102.13$2.94
Apr 20261181201941322$100.32$2.77
Mar 20262452421631123$91.38$3.04
Feb 2026771042191544$64.51$3.62
Jan 20261,4461,4403,0462,22473$60.04$7.72
Dec 20251,6021,6073,4762,62338$57.97$4.26
Nov 20251,7041,7073,3932,54240$60.06$3.79
Oct 20251,8101,8044,2653,17830$60.89$3.19
Sep 20251,8571,8553,6922,80916$63.96$2.97
Aug 20251,6921,7044,2503,29453$64.86$2.91
Jul 20251,9721,9684,2033,21240$68.39$3.20
Jun 20252,0752,0744,2063,19839$68.17$3.02
May 20252,2672,3004,7163,62943$62.17$3.12
Apr 20252,1752,1404,5083,49543$63.54$3.42
Mar 20252,3802,3874,5783,45628$68.24$4.12
Feb 20252,3302,3314,7733,62035$71.53$4.19
Jan 20252,7372,7304,0153,03533$75.74$4.13
Dec 20242,5982,5963,6442,83020$70.12$3.01
Nov 20242,8122,8114,3383,44622$69.95$2.12
Oct 20243,0883,0924,6763,75028$71.99$2.20
Sep 20243,0903,0904,7953,81733$70.24$2.28
Aug 20243,4213,4195,7854,61342$76.68$1.99
Jul 20243,6833,6806,6185,39649$81.80$2.07
Jun 20243,8673,8856,6055,52138$79.77$2.54
May 20245,9025,8988,8187,50046$80.02$2.12
Apr 20245,1445,1326,6385,56278$85.35$1.60
Mar 20243,8033,8087,7036,57234$81.28$1.49
Feb 20244,9794,9788,7327,96842$77.25$1.72
Jan 20242,4292,4214,3753,97720$74.15$3.18
Dec 20234,6284,6226,8216,23721$71.90$2.52
Nov 20233,4403,4497,1346,44728$77.69$2.71
Oct 20235,7855,7849,4478,64619$85.64$2.98
Sep 20236,1016,12911,26110,41719$89.43$2.64
Aug 20237,1937,20512,22811,35924$81.39$2.58

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)CountyKarnes County

Marathon Oil Ef LLC in Karnes County

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Eagleville (Eagle Ford-2) field

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