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Texas oil lease

Producing

MARTIN MASON B

Martin Mason B is an oil lease in McMullen County, Texas, operated by Ineos USA Oil & Gas LLC in the Eagleville (Eagle Ford-1) field.

2 wells

864bbl oil, last 12 months−32% vs prior year
Operator
Ineos USA Oil & Gas LLC
County
McMullen County
Field
Eagleville (Eagle Ford-1)
RRC lease
01-15437

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Where it sits

This county

McMullen CountyMcMullenLa SalleAtascosaKarnesFrioLive OakMcMullen County
McMullen County
Gas, last 12 months
33 mcf
Oil in Jul 2026
72 bbl

Production by month

Oil output fell 32% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 32% over the last 12 monthsMonthly oil production and gas for MARTIN MASON B, Aug 2023 to Jul 2026. Oil output fell 32% over the last 12 months. 864 bbl in the 12 months through Jul 2026, against 1,265 bbl in the 12 months before.Last 12 months: 864 bblbbl per monthmcf per month00100252005030075400100500125Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 32% over the last 12 monthsMonthly oil production and gas for MARTIN MASON B, Aug 2023 to Jul 2026. Oil output fell 32% over the last 12 months. 864 bbl in the 12 months through Jul 2026, against 1,265 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month00100252005030075400100500125Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

84% of the gas went to a transmission line in the last 12 months

Flaring peaked at 100.0% of the gas in May 2024.

  • Transmission line (2)
  • Flared (4)
84% of the gas went to a transmission line in the last 12 monthsShare of MARTIN MASON B gas by disposition code each month, Aug 2023 to Jul 2026. 84% of the gas went to a transmission line in the last 12 months. Flaring peaked at 100.0% of the gas in May 2024.Share of the lease’s gas by disposition code, per month0%50%100%Flared 100.0%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
84% of the gas went to a transmission line in the last 12 monthsShare of MARTIN MASON B gas by disposition code each month, Aug 2023 to Jul 2026. 84% of the gas went to a transmission line in the last 12 months. Flaring peaked at 100.0% of the gas in May 2024.Share of gas by disposition code0%50%100%Flared 100.0%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Transmission line (2)

    84% · 43 mcf

  • Flared (4)

    16% · 8 mcf

15.7% of the gas flared in the last 12 months. 16 months above 3%.

Who has run this lease

The operator changed once, most recently in Apr 2023

Operators of this lease over timeChesapeake Operating, L.L.C., Jan 2020 to Mar 2023; Ineos USA Oil & Gas LLC, Apr 2023 to Jul 20262020202120222023202420252026Changed Apr 2023Chesapeake Operating, L.L.C.Jan 2020 to Mar 2023Ineos USA Oil & Gas LLCApr 2023 to now
Operators of this lease over timeChesapeake Operating, L.L.C., Jan 2020 to Mar 2023; Ineos USA Oil & Gas LLC, Apr 2023 to Jul 20262020202120222023202420252026Changed Apr 2023Chesapeake Operating, L.L.C.Jan 2020 to Mar 2023Ineos USA Oil & Gas LLCApr 2023 to now

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

2 wells on this lease

Wells on MARTIN MASON B
API numberWell no.Status
42-311-342391HActive
42-311-34547I 4HActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Ineos Energy Marketing USA LLCOilGathers100Nov 1, 2023–
Ineos Energy Marketing USA LLCCasinghead gasBuys100Nov 1, 2023–
Williams Mlp Operating LLCCasinghead gasGathers100Oct 1, 2015–
Chesapeake Energy Mktg, L.l.c.Casinghead gasBuys100Sep 1, 2015Nov 1, 2023
Chesapeake Energy Mktg, L.l.c.OilGathers100Apr 28, 2023Nov 1, 2023
Chesapeake Energy Mktg, L.l.c.OilGathers20Sep 1, 2015Apr 28, 2023
Gulfmark Energy, Inc.OilGathers40Jun 1, 2013Apr 28, 2023
Valero Marketing and Supply Co.OilGathers40Jun 1, 2013Apr 28, 2023

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

Who buys my oilOil price check

354.48 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 Martin Mason B
API numberWell no.Acreson the permit
42-311-34547I 4H354.48
42-311-34547I 4HH354.48
42-311-342391H354.48

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

Unit decimal checker

Estimate your royalty

36 months, newest first

Ledger for MARTIN MASON B
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 2026Ineos USA72115651$80.46$2.89
Jun 2026Ineos USA793412111$84.81$3.15
May 2026Ineos USA830431$102.13$2.94
Apr 2026Ineos USA4790321$100.32$2.77
Mar 2026Ineos USA70167220$91.38$3.04
Feb 2026Ineos USA550422$64.51$3.62
Jan 2026Ineos USA8952000$60.04$7.72
Dec 2025Ineos USA7879000$57.97$4.26
Nov 2025Ineos USA72124000$60.06$3.79
Oct 2025Ineos USA940000$60.89$3.19
Sep 2025Ineos USA45209101$63.96$2.97
Aug 2025Ineos USA800101$64.86$2.91
Jul 2025Ineos USA811220$68.39$3.20
Jun 2025Ineos USA79118220$68.17$3.02
May 2025Ineos USA83144110$62.17$3.12
Apr 2025Ineos USA90113130$63.54$3.42
Mar 2025Ineos USA9311511110$68.24$4.12
Feb 2025Ineos USA8810727270$71.53$4.19
Jan 2025Ineos USA9811961610$75.74$4.13
Dec 2024Ineos USA915510100$70.12$3.01
Nov 2024Ineos USA986011110$69.95$2.12
Oct 2024Ineos USA11416314140$71.99$2.20
Sep 2024Ineos USA1169954540$70.24$2.28
Aug 2024Ineos USA2344931061060$76.68$1.99
Jul 2024Ineos USA30440617170$81.80$2.07
Jun 2024Ineos USA11837527270$79.77$2.54
May 2024Ineos USA149163101$80.02$2.12
Apr 2024Ineos USA38215918180$85.35$1.60
Mar 2024Ineos USA19917524231$81.28$1.49
Feb 2024Ineos USA2703231159124$77.25$1.72
Jan 2024Ineos USA514558535$74.15$3.18
Dec 2023Ineos USA75176817$71.90$2.52
Nov 2023Ineos USA310160745420$77.69$2.71
Oct 2023Ineos USA224334725616$85.64$2.98
Sep 2023Ineos USA300168483117$89.43$2.64
Aug 2023Ineos USA284500502426$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

OperatorIneos USA Oil & Gas LLCFieldEagleville (Eagle Ford-1)CountyMcMullen County

Ineos USA Oil & Gas LLC in McMullen County

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Eagleville (Eagle Ford-1) field

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