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Texas gas well

Producing

ELLIS UNIT A-521

Ellis Unit A-521 is a gas well in Jasper County, Texas, operated by Delfin Operating, LLC in the Brookeland (Austin Chalk, 8800) field.

1 well

698mcf gas, last 12 months−83% vs prior year
Operator
Delfin Operating, LLC
County
Jasper County
Field
Brookeland (Austin Chalk, 8800)
RRC lease
06-171881

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Where it sits

This county

Jasper CountyJasperSan AugustineHardinSabineTylerNewtonAngelinaJasper County
Jasper County
Oil, last 12 months
251 bbl
Gas in Jun 2026
9 mcf

Checks stopped on this lease?

  • Operator

    Operator changed: Delfin Operating, LLC took over from Permian Natural Resources in Nov 2024.

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

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Production by month

Gas output fell 83% over the last 12 months

Jul 2026 was not reported.

  • Gas (bars)
  • Oil (line)
  • Last 12 months
Gas output fell 83% over the last 12 monthsMonthly gas production and oil for ELLIS UNIT A-521, Aug 2023 to Jul 2026. Gas output fell 83% over the last 12 months. 501 mcf in the 12 months through Jul 2026, against 2,886 mcf in the 12 months before.Last 12 months: 501 mcfmcf per monthbbl per month00200504001006001508002001,000250Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Gas output fell 83% over the last 12 monthsMonthly gas production and oil for ELLIS UNIT A-521, Aug 2023 to Jul 2026. Gas output fell 83% over the last 12 months. 501 mcf in the 12 months through Jul 2026, against 2,886 mcf in the 12 months before.Last 12 monthsmcf per monthbbl per month00200504001006001508002001,000250Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

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

All of the gas went to a transmission line in the last 12 monthsShare of ELLIS UNIT A-521 gas by disposition code each month, Aug 2023 to Jul 2026. All of the gas went to a transmission line in the last 12 months.Share of the lease’s gas by disposition code, per month0%50%100%Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
All of the gas went to a transmission line in the last 12 monthsShare of ELLIS UNIT A-521 gas by disposition code each month, Aug 2023 to Jul 2026. All of the gas went to a transmission line 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.

Who has run this lease

The operator changed 3 times, most recently in Nov 2024

Operators of this lease over timeShoco Production, L.P., Jan 2020 to May 2020; Shoco Production LLC, Jun 2020 to Dec 2020; Permian Natural Resources, Jan 2021 to Oct 2024; Delfin Operating, LLC, Nov 2024 to Jun 20262020202120222023202420252026Changed Jun 2020Changed Jan 2021Changed Nov 2024Shoco Production, L.P.Jan 2020 to May 2020Shoco Production LLCJun 2020 to Dec 2020Permian Natural ResourcesJan 2021 to Oct 2024Delfin Operating, LLCNov 2024 to now
Operators of this lease over timeShoco Production, L.P., Jan 2020 to May 2020; Shoco Production LLC, Jun 2020 to Dec 2020; Permian Natural Resources, Jan 2021 to Oct 2024; Delfin Operating, LLC, Nov 2024 to Jun 20262020202120222023202420252026Changed Jun 2020Changed Jan 2021Changed Nov 2024Shoco Production, L.P.Jan 2020 to May 2020Shoco Production LLCJun 2020 to Dec 2020Permian Natural ResourcesJan 2021 to Oct 2024Delfin Operating, LLCNov 2024 to now

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

1 well on this lease

Wells on ELLIS UNIT A-521
API numberWell no.Status
42-241-306531Active

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Gulfmark Energy, Inc.CondensateGathers50Dec 1, 2019–
Shell Trading (Us) CompanyCondensateGathers50Dec 1, 2019–
Energy Transfer CompanyGas-well gasBuys100Nov 1, 2015–
Energy Transfer CompanyGas-well gasGathers100Nov 1, 2015–
Eastex Crude CompanyCondensateGathers50Dec 1, 2018Dec 1, 2019
Shell Trading (Us) CompanyCondensateGathers25Dec 1, 2018Dec 1, 2019
Sunoco Ptnrs. Mktg.&terminals LPCondensateGathers25Dec 1, 2018Dec 1, 2019

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

Who buys my oilOil price check

1,825.43 acres on the newest permit

  • Good to know

    A pooling certificate (P-12) was filed

    Your tract may share its production with neighbors in a pooled unit. The unit acres the operator uses to divide production can differ from the acreage on one 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 Ellis Unit A-521
API numberWell no.Acreson the permit
42-241-3065311,825.43

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

Unit decimal checker

Estimate your royalty

36 months, newest first

Ledger for ELLIS UNIT A-521
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 2026No report–––––$80.46$2.89
Jun 2026Delfin Operating,180990$84.81$3.15
May 2026Delfin Operating,20030300$102.13$2.94
Apr 2026Delfin Operating,45019190$100.32$2.77
Mar 2026Delfin Operating,150000$91.38$3.04
Feb 2026Delfin Operating,8010100$64.51$3.62
Jan 2026Delfin Operating,12050500$60.04$7.72
Dec 2025Delfin Operating,21163880$57.97$4.26
Nov 2025Delfin Operating,37040400$60.06$3.79
Oct 2025Delfin Operating,2601171170$60.89$3.19
Sep 2025Delfin Operating,2801191190$63.96$2.97
Aug 2025Delfin Operating,7099990$64.86$2.91
Jul 2025Delfin Operating,1401971970$68.39$3.20
Jun 2025Delfin Operating,6503203200$68.17$3.02
May 2025Delfin Operating,681554894890$62.17$3.12
Apr 2025Delfin Operating,48010100$63.54$3.42
Mar 2025Delfin Operating,34014140$68.24$4.12
Feb 2025Delfin Operating,2489000$71.53$4.19
Jan 2025Delfin Operating,6801971970$75.74$4.13
Dec 2024Delfin Operating,2802532530$70.12$3.01
Nov 2024Delfin Operating,628922702700$69.95$2.12
Oct 2024Permian Natural25684304300$71.99$2.20
Sep 2024Permian Natural301675225220$70.24$2.28
Aug 2024Permian Natural3501841840$76.68$1.99
Jul 2024Permian Natural21917142420$81.80$2.07
Jun 2024Permian Natural142014140$79.77$2.54
May 2024Permian Natural10504744740$80.02$2.12
Apr 2024Permian Natural691048368360$85.35$1.60
Mar 2024Permian Natural1441764164160$81.28$1.49
Feb 2024Permian Natural18702062060$77.25$1.72
Jan 2024Permian Natural16803313310$74.15$3.18
Dec 2023Permian Natural1201802552550$71.90$2.52
Nov 2023Permian Natural124075750$77.69$2.71
Oct 2023Permian Natural857891910$85.64$2.98
Sep 2023Permian Natural741791401400$89.43$2.64
Aug 2023Permian Natural113876496490$81.39$2.58

No report filed

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

OperatorDelfin Operating, LLCFieldBrookeland (Austin Chalk, 8800)CountyJasper County

Delfin Operating, LLC in Jasper County

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Brookeland (Austin Chalk, 8800) field

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