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Producing

MCWILLIAMS-O'NEILL EF

McWilliams-O'Neill Ef is an oil lease in Frio County, Texas, operated by Trailblazer Energy Resources,llc in the Briscoe Ranch (Eagleford) field.

1 well

4,329bbl oil, last 12 months−25% vs prior year
Operator
Trailblazer Energy Resources,llc
County
Frio County
Field
Briscoe Ranch (Eagleford)
RRC lease
01-19838

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Where it sits

This county

Frio CountyFrioZavalaAtascosaUvaldeMedinaBexarFrio County
Frio County
Gas, last 12 months
46,143 mcf
Oil in Jul 2026
305 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 MCWILLIAMS-O'NEILL EF, Aug 2023 to Jul 2026. Oil output fell 25% over the last 12 months. 4,329 bbl in the 12 months through Jul 2026, against 5,738 bbl in the 12 months before.Last 12 months: 4,329 bblbbl per monthmcf per month002505,00050010k75015k1,00020kOct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output fell 25% over the last 12 monthsMonthly oil production and gas for MCWILLIAMS-O'NEILL EF, Aug 2023 to Jul 2026. Oil output fell 25% over the last 12 months. 4,329 bbl in the 12 months through Jul 2026, against 5,738 bbl in the 12 months before.Last 12 monthsbbl per monthmcf per month002505,00050010k75015k1,00020kJan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

91% of the gas went to a processing plant in the last 12 months

  • Processing plant (3)
  • Lease fuel (1)
91% of the gas went to a processing plant in the last 12 monthsShare of MCWILLIAMS-O'NEILL EF gas by disposition code each month, Aug 2023 to Jul 2026. 91% 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
91% of the gas went to a processing plant in the last 12 monthsShare of MCWILLIAMS-O'NEILL EF gas by disposition code each month, Aug 2023 to Jul 2026. 91% 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.

  • Processing plant (3)

    91% · 41,804 mcf

  • Lease fuel (1)

    9.4% · 4,339 mcf

Who has run this lease

The operator changed once, most recently in Sep 2023

Operators of this lease over timeVirtex Operating Company, Inc., Jan 2020 to Aug 2023; Trailblazer Energy Resources,llc, Sep 2023 to Jul 20262020202120222023202420252026Changed Sep 2023Virtex Operating Company, Inc.Jan 2020 to Aug 2023Trailblazer Energy Resources,…Sep 2023 to now
Operators of this lease over timeVirtex Operating Company, Inc., Jan 2020 to Aug 2023; Trailblazer Energy Resources,llc, Sep 2023 to Jul 20262020202120222023202420252026Changed Sep 2023Virtex Operating Company, Inc.Jan 2020 to Aug 2023Trailblazer Energy Resources,llcSep 2023 to now

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

1 well on this lease

Wells on MCWILLIAMS-O'NEILL EF
API numberWell no.Status
42-163-341811HActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%FromUntil
Shell Trading (Us) CompanyOilGathers100Sep 1, 2023–
Targa Frio Lasalle Pipeline LPCasinghead gasBuys60Sep 1, 2023–
Et Gathering & Processing LLCCasinghead gasBuys40Nov 1, 2023–
Targa Frio Lasalle Pipeline LPCasinghead gasGathers60Sep 1, 2023–
Energy Transfer CompanyCasinghead gasGathers40Sep 1, 2023–
Energy Transfer CompanyCasinghead gasBuys40Sep 1, 2023Nov 1, 2023
Faraday Midstream CompanyCasinghead gasGathers100Jul 8, 2019Sep 1, 2023
Energy Transfer CompanyCasinghead gasBuys20Jan 1, 2023Sep 1, 2023
Targa Midstream Services LLCCasinghead gasBuys80Jan 1, 2023Sep 1, 2023
Eastex Crude Company, LLCOilGathers100Jan 1, 2023Sep 1, 2023
Energy Transfer CompanyCasinghead gasBuys35Jul 8, 2019Jan 1, 2023

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

Who buys my oilOil price check

1,036.60 acres on the newest permit

Check your decimal on this lease
Permits for McWilliams-O'Neill Ef
API numberWell no.Acreson the permit
42-163-341811H1,036.60

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

Unit decimal checker

Estimate your royalty

36 months, newest first

Ledger for MCWILLIAMS-O'NEILL EF
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 2026Trailblazer Energy3053273,7263,3540$80.46$2.89
Jun 2026Trailblazer Energy3423272,2761,9160$84.81$3.15
May 2026Trailblazer Energy3783283,8893,5170$102.13$2.94
Apr 2026Trailblazer Energy3573373,8063,4460$100.32$2.77
Mar 2026Trailblazer Energy3654803,9083,5360$91.38$3.04
Feb 2026Trailblazer Energy3343343,7463,4100$64.51$3.62
Jan 2026Trailblazer Energy3553334,1903,8180$60.04$7.72
Dec 2025Trailblazer Energy5175194,0743,7020$57.97$4.26
Nov 2025Trailblazer Energy3393574,0363,6980$60.06$3.79
Oct 2025Trailblazer Energy3423374,2693,8970$60.89$3.19
Sep 2025Trailblazer Energy3533194,2563,9050$63.96$2.97
Aug 2025Trailblazer Energy3423473,9673,6050$64.86$2.91
Jul 2025Trailblazer Energy3773445,3484,9860$68.39$3.20
Jun 2025Trailblazer Energy3655085,2244,8730$68.17$3.02
May 2025Trailblazer Energy35817819,70819,3460$62.17$3.12
Apr 2025Trailblazer Energy4103425,0084,6570$63.54$3.42
Mar 2025Trailblazer Energy3854835,6925,3340$68.24$4.12
Feb 2025Trailblazer Energy5296745,7365,4090$71.53$4.19
Jan 2025Trailblazer Energy5505176,6896,3270$75.74$4.13
Dec 2024Trailblazer Energy5895115,3825,3820$70.12$3.01
Nov 2024Trailblazer Energy5886864,4224,4220$69.95$2.12
Oct 2024Trailblazer Energy5125172,3692,3690$71.99$2.20
Sep 2024Trailblazer Energy5203382,7532,7530$70.24$2.28
Aug 2024Trailblazer Energy5555153,0863,0860$76.68$1.99
Jul 2024Trailblazer Energy6045092,9802,9800$81.80$2.07
Jun 2024Trailblazer Energy4466752,7502,7500$79.77$2.54
May 2024Trailblazer Energy6106553,3353,3350$80.02$2.12
Apr 2024Trailblazer Energy5345093,2443,2440$85.35$1.60
Mar 2024Trailblazer Energy5657183,5743,5740$81.28$1.49
Feb 2024Trailblazer Energy6013782,9342,9340$77.25$1.72
Jan 2024Trailblazer Energy7327553,7093,1300$74.15$3.18
Dec 2023Trailblazer Energy7797533,4713,2400$71.90$2.52
Nov 2023Trailblazer Energy9479343,8283,5650$77.69$2.71
Oct 2023Trailblazer Energy5955634,2803,9800$85.64$2.98
Sep 2023Trailblazer Energy5807313,8443,4820$89.43$2.64
Aug 2023Virtex Operating6258583,3723,3720$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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Nearby

This lease belongs to

OperatorTrailblazer Energy Resources,llcFieldBriscoe Ranch (Eagleford)CountyFrio County

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