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Texas oil lease

Producing

MARTIN MASON UNIT K

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

2 wells

4,001bbl oil, last 12 months−25% vs prior year
Operator
Ineos USA Oil & Gas LLC
County
McMullen County
Field
Eagleville (Eagle Ford-1)
RRC lease
01-16434

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Where it sits

This county

McMullen CountyMcMullenLa SalleAtascosaKarnesFrioLive OakMcMullen County
McMullen County
Gas, last 12 months
6,654 mcf
Oil in Jul 2026
295 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 MARTIN MASON UNIT K, Aug 2023 to Jul 2026. Oil output fell 25% over the last 12 months. 4,001 bbl in the 12 months through Jul 2026, against 5,313 bbl in the 12 months before.Last 12 months: 4,001 bblbbl per monthmcf per month005002501,0005001,5007502,0001,0002,5001,250Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 25% over the last 12 monthsMonthly oil production and gas for MARTIN MASON UNIT K, Aug 2023 to Jul 2026. Oil output fell 25% over the last 12 months. 4,001 bbl in the 12 months through Jul 2026, against 5,313 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month005002501,0005001,5007502,0001,0002,5001,250Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

65% of the gas went to a transmission line in the last 12 months

Flaring peaked at 73.9% of the gas in Aug 2023.

  • Transmission line (2)
  • Lease fuel (1)
  • Flared (4)
65% of the gas went to a transmission line in the last 12 monthsShare of MARTIN MASON UNIT K gas by disposition code each month, Aug 2023 to Jul 2026. 65% of the gas went to a transmission line in the last 12 months. Flaring peaked at 73.9% of the gas in Aug 2023.Share of the lease’s gas by disposition code, per month0%50%100%Flared 73.9%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
65% of the gas went to a transmission line in the last 12 monthsShare of MARTIN MASON UNIT K gas by disposition code each month, Aug 2023 to Jul 2026. 65% of the gas went to a transmission line in the last 12 months. Flaring peaked at 73.9% of the gas in Aug 2023.Share of gas by disposition code0%50%100%Flared 73.9%Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Transmission line (2)

    65% · 4,322 mcf

  • Lease fuel (1)

    33% · 2,169 mcf

  • Flared (4)

    2.4% · 163 mcf

2.4% of the gas flared in the last 12 months. 11 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 UNIT K
API numberWell no.Status
42-311-34661L 1HActive
42-311-34757K 2HActive

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.OilGathers100Sep 1, 2015Nov 1, 2023

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

Who buys my oilOil price check

640 acres on the newest permit

  • Good to know

    The wells on this lease state different acreage

    The permits state between 640 and 2,482.37 acres. Use the acres from your own division order for the well you are paid on.

  • 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 Unit K
API numberWell no.Acreson the permit
42-311-34757K 2H640
42-311-34661L 1H2,482.37

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 UNIT K
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 2026Ineos USA29530176049120$80.46$2.89
Jun 2026Ineos USA33328963136624$84.81$3.15
May 2026Ineos USA37531285757929$102.13$2.94
Apr 2026Ineos USA46267684557430$100.32$2.77
Mar 2026Ineos USA56036068742414$91.38$3.04
Feb 2026Ineos USA2201901020$64.51$3.62
Jan 2026Ineos USA2111614903103$60.04$7.72
Dec 2025Ineos USA4204957615102$57.97$4.26
Nov 2025Ineos USA5224997274842$60.06$3.79
Oct 2025Ineos USA7114144423920$60.89$3.19
Sep 2025Ineos USA34731252439$63.96$2.97
Aug 2025Ineos USA38333721020010$64.86$2.91
Jul 2025Ineos USA3916212532530$68.39$3.20
Jun 2025Ineos USA3764873363360$68.17$3.02
May 2025Ineos USA4172863433430$62.17$3.12
Apr 2025Ineos USA4245093933930$63.54$3.42
Mar 2025Ineos USA4854595215210$68.24$4.12
Feb 2025Ineos USA5327233573570$71.53$4.19
Jan 2025Ineos USA38214690900$75.74$4.13
Dec 2024Ineos USA36148164640$70.12$3.01
Nov 2024Ineos USA4875084664660$69.95$2.12
Oct 2024Ineos USA4485115005000$71.99$2.20
Sep 2024Ineos USA4795056326320$70.24$2.28
Aug 2024Ineos USA5314887967960$76.68$1.99
Jul 2024Ineos USA6224761,1641,1631$81.80$2.07
Jun 2024Ineos USA6176231,0091,0081$79.77$2.54
May 2024Ineos USA9241,0521,1451,13312$80.02$2.12
Apr 2024Ineos USA1,3431,3931031030$85.35$1.60
Mar 2024Ineos USA9118581331285$81.28$1.49
Feb 2024Ineos USA00000$77.25$1.72
Jan 2024Ineos USA00000$74.15$3.18
Dec 2023Ineos USA00000$71.90$2.52
Nov 2023Ineos USA9216734295$77.69$2.71
Oct 2023Ineos USA2291611459$85.64$2.98
Sep 2023Ineos USA17815820137$89.43$2.64
Aug 2023Ineos USA20834023617$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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