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Texas oil lease

Producing

SAMPSON-MUELLER UNIT

Sampson-Mueller Unit is an oil lease in Fayette County, Texas, operated by Magnolia Oil & Gas Operating LLC in the Giddings (Austin Chalk-3) field.

2 wells

4,173bbl oil, last 12 months−24% vs prior year
Operator
Magnolia Oil & Gas Operating LLC
County
Fayette County
Field
Giddings (Austin Chalk-3)
RRC lease
03-22537

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Where it sits

This county

Fayette CountyFayetteCaldwellBastropWashingtonBurlesonLeeAustinColoradoFayette County
Fayette County
Gas, last 12 months
15,428 mcf
Oil in Jul 2026
563 bbl

Production by month

Oil output fell 24% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output fell 24% over the last 12 monthsMonthly oil production and gas for SAMPSON-MUELLER UNIT, Aug 2023 to Jul 2026. Oil output fell 24% over the last 12 months. 4,173 bbl in the 12 months through Jul 2026, against 5,498 bbl in the 12 months before.Last 12 months: 4,173 bblbbl per monthmcf per month005002,5001,0005,0001,5007,5002,00010kOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 24% over the last 12 monthsMonthly oil production and gas for SAMPSON-MUELLER UNIT, Aug 2023 to Jul 2026. Oil output fell 24% over the last 12 months. 4,173 bbl in the 12 months through Jul 2026, against 5,498 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month005002,5001,0005,0001,5007,5002,00010kJan 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 SAMPSON-MUELLER UNIT 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 SAMPSON-MUELLER UNIT 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 once, most recently in Aug 2025

Operators of this lease over timeDallas Petroleum Group, LLC, Jan 2020 to Jul 2025; Magnolia Oil & Gas Operating LLC, Aug 2025 to Jul 20262020202120222023202420252026Changed Aug 2025Dallas Petroleum Group, LLCJan 2020 to Jul 2025Magnolia Oil & Gas Operating…Aug 2025 to now
Operators of this lease over timeDallas Petroleum Group, LLC, Jan 2020 to Jul 2025; Magnolia Oil & Gas Operating LLC, Aug 2025 to Jul 20262020202120222023202420252026Changed Aug 2025Dallas Petroleum Group, LLCJan 2020 to Jul 2025Magnolia Oil & Gas Operating LLCAug 2025 to now

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

2 wells on this lease

Wells on SAMPSON-MUELLER UNIT
API numberWell no.Status
42-149-311792Shut-in
42-149-329001Shut-in

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Genesis Crude Oil, L.p.OilGathers100Aug 1, 2020–
Energy Transfer CompanyCasinghead gasBuys100May 1, 2005–
Energy Transfer CompanyCasinghead gasGathers100May 1, 2005–
Plains Marketing, L.p.OilGathers100Jul 1, 2000Aug 1, 2020

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

Who buys my oilOil price check

462.71 acres on the newest permit

A pooling certificate was filed

The wells on this lease state different acreage

The permits state between 216 and 462.71 acres.

Permits for Sampson-Mueller Unit
API numberWell no.Acreson the permit
42-149-311792462.71
42-149-329001462.71
42-149-314123216

SourceRailroad Commission drilling permits, Sep 26, 2026 (source 1, source 2).

Unit decimal checker

What Magnolia Oil & Gas Corporation told investors it received

Magnolia Oil & Gas Operating LLC is linked to Magnolia Oil & Gas Corporation (MGY).
Realized prices reported by Magnolia Oil & Gas Corporation
QuarterOil$ per bblFiling
Q2 2026$98.13SEC filing
Q1 2026$70.29SEC filing
Q3 2025$63.55SEC filing
Q2 2025$62.20SEC filing
Q1 2025$69.81SEC filing
Q3 2024$74.23SEC filing

SourceMagnolia Oil & Gas Corporation quarterly reports, SEC EDGAR, company-wide averages before hedging.

Estimate your royalty

36 months, newest first

Ledger for SAMPSON-MUELLER UNIT
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 2026Magnolia Oil5635481,0341,0340$80.46$2.89
Jun 2026Magnolia Oil9604414410$84.81$3.15
May 2026Magnolia Oil2171864814810$102.13$2.94
Apr 2026Magnolia Oil4473631,7421,7420$100.32$2.77
Mar 2026Magnolia Oil1,3881,4632,5462,5460$91.38$3.04
Feb 2026Magnolia Oil1,0419077327320$64.51$3.62
Jan 2026Magnolia Oil2906836830$60.04$7.72
Dec 2025Magnolia Oil002332330$57.97$4.26
Nov 2025Magnolia Oil0040400$60.06$3.79
Oct 2025Magnolia Oil0056560$60.89$3.19
Sep 2025Magnolia Oil1171000$63.96$2.97
Aug 2025Magnolia Oil3911,0337,4407,4400$64.86$2.91
Jul 2025Dallas Petroleum4793707,1627,1620$68.39$3.20
Jun 2025Dallas Petroleum6665615,3935,3930$68.17$3.02
May 2025Dallas Petroleum2993712,5012,5010$62.17$3.12
Apr 2025Dallas Petroleum981895215210$63.54$3.42
Mar 2025Dallas Petroleum4413724,5094,5090$68.24$4.12
Feb 2025Dallas Petroleum5073756,0076,0070$71.53$4.19
Jan 2025Dallas Petroleum6451,1496,5646,5640$75.74$4.13
Dec 2024Dallas Petroleum5853757,4517,4510$70.12$3.01
Nov 2024Dallas Petroleum4361957,0327,0320$69.95$2.12
Oct 2024Dallas Petroleum4353866,6796,6790$71.99$2.20
Sep 2024Dallas Petroleum4433725,0835,0830$70.24$2.28
Aug 2024Dallas Petroleum4643764,1394,1390$76.68$1.99
Jul 2024Dallas Petroleum4195673,7783,7780$81.80$2.07
Jun 2024Dallas Petroleum5235716,0476,0470$79.77$2.54
May 2024Dallas Petroleum6505706,4626,4620$80.02$2.12
Apr 2024Dallas Petroleum7117656,1576,1570$85.35$1.60
Mar 2024Dallas Petroleum1,1989617,7917,7910$81.28$1.49
Feb 2024Dallas Petroleum1,0471,3479,2779,2770$77.25$1.72
Jan 2024Dallas Petroleum9528379,6729,6720$74.15$3.18
Dec 2023Dallas Petroleum9471,1639,0339,0330$71.90$2.52
Nov 2023Dallas Petroleum9289528,7468,7460$77.69$2.71
Oct 2023Dallas Petroleum1,0671,1139,3429,3420$85.64$2.98
Sep 2023Dallas Petroleum7883706,4916,4910$89.43$2.64
Aug 2023Dallas Petroleum7851,3235,6005,6000$81.39$2.58

SourceTexas Railroad Commission Production Data Query, through Jul 2026. Prices: EIA, through Aug 2026. Updated Sep 28, 2026.

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Nearby

This lease belongs to

OperatorMagnolia Oil & Gas Operating LLCFieldGiddings (Austin Chalk-3)CountyFayette County

Magnolia Oil & Gas Operating LLC in Fayette County

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Giddings (Austin Chalk-3) field

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