Skip to content
Royalty Clerk

Texas oil lease

Producing

DUFFY

Duffy is an oil lease in Jack County, Texas, operated by Winfield Operating Company in the Post Oak, SW. (Marble Falls) field.

1 well

229bbl oil, last 12 months+17% vs prior year
Operator
Winfield Operating Company
County
Jack County
Field
Post Oak, SW. (Marble Falls)
RRC lease
09-29162

Is your check right?

Check my statement

Where it sits

This county

Jack CountyJackWiseClayMontagueYoungArcherJack County
Jack County
Gas, last 12 months
195 mcf
Oil in Jul 2026
0 bbl

Production by month

Oil output rose 17% over the last 12 months

  • Oil (bars)
  • Gas (line)
  • Last 12 months
Oil output rose 17% over the last 12 monthsMonthly oil production and gas for DUFFY, Aug 2023 to Jul 2026. Oil output rose 17% over the last 12 months. 229 bbl in the 12 months through Jul 2026, against 195 bbl in the 12 months before.Last 12 months: 229 bblbbl per monthmcf per month0020540106015802010025Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output rose 17% over the last 12 monthsMonthly oil production and gas for DUFFY, Aug 2023 to Jul 2026. Oil output rose 17% over the last 12 months. 229 bbl in the 12 months through Jul 2026, against 195 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month0020540106015802010025Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

All of the gas went to a processing plant in the last 12 months

All of the gas went to a processing plant in the last 12 monthsShare of DUFFY gas by disposition code each month, Aug 2023 to Jul 2026. All of the gas went to a processing plant 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 processing plant in the last 12 monthsShare of DUFFY gas by disposition code each month, Aug 2023 to Jul 2026. All of the gas went to a processing plant 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.

1 well on this lease

Wells on DUFFY
API numberWell no.Status
42-237-348121Active

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Ptt Premier Trading and Tran LLCOilGathers100Nov 1, 2023–
Targa Midstream Services LLCCasinghead gasGathers100Oct 1, 2011Nov 1, 2023
Targa Midstream Services LLCCasinghead gasBuys100Nov 1, 2018Nov 1, 2023
Gulfmark Energy, Inc.OilGathers100Nov 1, 2018Nov 1, 2023

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

Who buys my oilOil price check

125 acres on the newest permit

Permits for Duffy
API numberWell no.Acreson the permit
42-237-348121125

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

Unit decimal checker

Estimate your royalty

36 months, newest first

Ledger for DUFFY
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 202600000$80.46$2.89
Jun 2026120000$84.81$3.15
May 202636177000$102.13$2.94
Apr 2026100000$100.32$2.77
Mar 202627025250$91.38$3.04
Feb 202623025250$64.51$3.62
Jan 202616025250$60.04$7.72
Dec 202517025250$57.97$4.26
Nov 202542025250$60.06$3.79
Oct 20251817625250$60.89$3.19
Sep 20258025250$63.96$2.97
Aug 202520020200$64.86$2.91
Jul 2025260000$68.39$3.20
Jun 202517025250$68.17$3.02
May 202535025250$62.17$3.12
Apr 202520025250$63.54$3.42
Mar 2025515025250$68.24$4.12
Feb 202560000$71.53$4.19
Jan 20255020200$75.74$4.13
Dec 202450000$70.12$3.01
Nov 2024150000$69.95$2.12
Oct 202417011110$71.99$2.20
Sep 202422014140$70.24$2.28
Aug 202422018180$76.68$1.99
Jul 202422020200$81.80$2.07
Jun 2024150000$79.77$2.54
May 20243417815150$80.02$2.12
Apr 20240010100$85.35$1.60
Mar 2024370000$81.28$1.49
Feb 2024580000$77.25$1.72
Jan 2024160000$74.15$3.18
Dec 20231010100$71.90$2.52
Nov 202310000$77.69$2.71
Oct 202310000$85.64$2.98
Sep 202330000$89.43$2.64
Aug 2023150000$81.39$2.58

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

How to check your stub against this lease

Do your checks match this lease?

Check my statement

Nearby

This lease belongs to

OperatorWinfield Operating CompanyFieldPost Oak, SW. (Marble Falls)CountyJack County

Winfield Operating Company in Jack County

All Winfield Operating Company leases →

Post Oak, SW. (Marble Falls) field

All leases in this field →

Leases within 10 km

Drilling permits within 10 km