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Producing

COX, MARION HEIRS -A-

Cox, Marion Heirs -A- is an oil lease in Brown County, Texas, operated by Southwest Gas Systems, Inc. in the Brown County Regular field.

2 wells

611bbl oil, last 12 months−22% vs prior year
Operator
Southwest Gas Systems, Inc.
County
Brown County
Field
Brown County Regular
RRC lease
7B-00240

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Where it sits

This county

Brown CountyBrownCallahanEastlandErathComancheMillsColemanBrown County
Brown County
Gas, last 12 months
2,738 mcf
Oil in Jul 2026
45 bbl

Checks stopped on this lease?

  • Operator

    Operator changed: Southwest Gas Systems, Inc. took over from Furry Producing Company in Jan 2025.

SourceRailroad Commission production, P-5 and P-4 records, data through Jul 2026.

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Production by month

Oil output fell 22% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 22% over the last 12 monthsMonthly oil production and gas for COX, MARION HEIRS -A-, Aug 2023 to Jul 2026. Oil output fell 22% over the last 12 months. 611 bbl in the 12 months through Jul 2026, against 785 bbl in the 12 months before.Last 12 months: 611 bblbbl per monthmcf per month0050100100200150300200400Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 22% over the last 12 monthsMonthly oil production and gas for COX, MARION HEIRS -A-, Aug 2023 to Jul 2026. Oil output fell 22% over the last 12 months. 611 bbl in the 12 months through Jul 2026, against 785 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month0050100100200150300200400Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

Since Jan 2025 the lease's gas goes to a processing plant instead of a transmission line

  • Processing plant (3)
  • Transmission line (2)
Since Jan 2025 the lease's gas goes to a processing plant instead of a transmission lineShare of COX, MARION HEIRS -A- gas by disposition code each month, Aug 2023 to Jul 2026. Since Jan 2025 the lease's gas goes to a processing plant instead of a transmission line.Share of the lease’s gas by disposition code, per month0%50%100%Jan 2025: line to plantOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Since Jan 2025 the lease's gas goes to a processing plant instead of a transmission lineShare of COX, MARION HEIRS -A- gas by disposition code each month, Aug 2023 to Jul 2026. Since Jan 2025 the lease's gas goes to a processing plant instead of a transmission line.Share of gas by disposition code0%50%100%Jan 25: line to plantJan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Who has run this lease

The operator changed once, most recently in Jan 2025

Operators of this lease over timeFurry Producing Company, Jan 2020 to Dec 2024; Southwest Gas Systems, Inc., Jan 2025 to Jul 20262020202120222023202420252026Changed Jan 2025Furry Producing CompanyJan 2020 to Dec 2024Southwest Gas Systems, Inc.Jan 2025 to now
Operators of this lease over timeFurry Producing Company, Jan 2020 to Dec 2024; Southwest Gas Systems, Inc., Jan 2025 to Jul 20262020202120222023202420252026Changed Jan 2025Furry Producing CompanyJan 2020 to Dec 2024Southwest Gas Systems, Inc.Jan 2025 to now

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

2 wells on this lease

Wells on COX, MARION HEIRS -A-
API numberWell no.Status
42-049-804981Active
42-049-804992Active

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Energy Transfer Marketing & TermOilGathers100Dec 1, 2022–
Flamingo Gas, Inc.Casinghead gasBuys100Nov 1, 2019–
Flamingo Gas, Inc.Casinghead gasGathers100Nov 1, 2019–
Sunoco Ptnrs. Mktg.&terminals LPOilGathers100Apr 1, 2002Dec 1, 2022
Midcoast Gathering (N Tx) L.p.Casinghead gasGathers100Oct 1, 2018Nov 1, 2019
Midcoast G & P (North Texas)l.p.Casinghead gasBuys100Oct 1, 2018Nov 1, 2019

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

Who buys my oilOil price check

What the drilling permits say

  • Good to know

    The state has no unit acreage for this lease

    Ask the operator for the acreage on your well's division order and unit plat.

Check your decimal on this lease
Permits for Cox, Marion Heirs -A-
API numberWell no.Acreson the permit
42-049-804981–
42-049-804992–

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

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36 months, newest first

Ledger for COX, MARION HEIRS -A-
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 2026Southwest Gas451102102100$80.46$2.89
Jun 2026Southwest Gas50462172170$84.81$3.15
May 2026Southwest Gas1802332330$102.13$2.94
Apr 2026Southwest Gas631032262260$100.32$2.77
Mar 2026Southwest Gas6602152150$91.38$3.04
Feb 2026Southwest Gas52952192190$64.51$3.62
Jan 2026Southwest Gas5001921920$60.04$7.72
Dec 2025Southwest Gas55812422420$57.97$4.26
Nov 2025Southwest Gas30742262260$60.06$3.79
Oct 2025Southwest Gas8002432430$60.89$3.19
Sep 2025Southwest Gas581082622620$63.96$2.97
Aug 2025Southwest Gas4402532530$64.86$2.91
Jul 2025Southwest Gas47852812810$68.39$3.20
Jun 2025Southwest Gas421662712710$68.17$3.02
May 2025Southwest Gas12202852850$62.17$3.12
Apr 2025Southwest Gas4603003000$63.54$3.42
Mar 2025Southwest Gas1803333023020$68.24$4.12
Feb 2025Southwest Gas9001921920$71.53$4.19
Jan 2025Southwest Gas3601811810$75.74$4.13
Dec 2024Furry Producing391752502500$70.12$3.01
Nov 2024Furry Producing4702652650$69.95$2.12
Oct 2024Furry Producing4702932930$71.99$2.20
Sep 2024Furry Producing4502972970$70.24$2.28
Aug 2024Furry Producing441852742740$76.68$1.99
Jul 2024Furry Producing5503353350$81.80$2.07
Jun 2024Furry Producing5403663660$79.77$2.54
May 2024Furry Producing2001341340$80.02$2.12
Apr 2024Furry Producing2601971970$85.35$1.60
Mar 2024Furry Producing151821011010$81.28$1.49
Feb 2024Furry Producing3702392390$77.25$1.72
Jan 2024Furry Producing4302842840$74.15$3.18
Dec 2023Furry Producing4802582580$71.90$2.52
Nov 2023Furry Producing501682362360$77.69$2.71
Oct 2023Furry Producing502262260$85.64$2.98
Sep 2023Furry Producing4802762760$89.43$2.64
Aug 2023Furry Producing3702812810$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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This lease belongs to

OperatorSouthwest Gas Systems, Inc.FieldBrown County RegularCountyBrown County

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