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Texas oil lease

Producing

BIG BERTHA 0310 E

Big Bertha 0310 E is an oil lease in Upton County, Texas, operated by Firebird Energy II LLC in the Spraberry (Trend Area) field.

2 wells

191,725bbl oil, since Jan 2026
Operator
Firebird Energy II LLC
County
Upton County
Field
Spraberry (Trend Area)
RRC lease
7C-23528

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Where it sits

This county

Upton CountyUptonMidlandCraneGlasscockReaganEctorUpton County
Upton County
Gas, since Jan 2026
293,762 mcf
Oil in Jul 2026
17,141 bbl

Production by month

Oil output fell 38% since Jan 2026

  • Oil (bars)
  • Gas (line)
Oil output fell 38% since Jan 2026Monthly oil production and gas for BIG BERTHA 0310 E, Jan 2026 to Jul 2026. Oil output fell 38% since Jan 2026. Monthly average of 20,715 bbl in the latest 3 months, against 33,215 bbl in the first 3.bbl per monthmcf per month0010k20k20k40k30k60k40k80k50k100kOct 25Jan 26AprJul
Oil output fell 38% since Jan 2026Monthly oil production and gas for BIG BERTHA 0310 E, Jan 2026 to Jul 2026. Oil output fell 38% since Jan 2026. Monthly average of 20,715 bbl in the latest 3 months, against 33,215 bbl in the first 3.bbl per monthmcf per month0010k20k20k40k30k60k40k80k50k100kJan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

Where the gas went

98% of the gas went to a transmission line in the 7 months reported

Flaring peaked at 3.6% of the gas in Jul 2026.

  • Transmission line (2)
  • Flared (4)
98% of the gas went to a transmission line in the 7 months reportedShare of BIG BERTHA 0310 E gas by disposition code each month, Jan 2026 to Jul 2026. 98% of the gas went to a transmission line in the 7 months reported. Flaring peaked at 3.6% of the gas in Jul 2026.Share of the lease’s gas by disposition code, per month0%50%100%Flared 3.6%Oct 25Jan 26AprJul
98% of the gas went to a transmission line in the 7 months reportedShare of BIG BERTHA 0310 E gas by disposition code each month, Jan 2026 to Jul 2026. 98% of the gas went to a transmission line in the 7 months reported. Flaring peaked at 3.6% of the gas in Jul 2026.Share of gas by disposition code0%50%100%Flared 3.6%Jan 26Jul

SourceTexas Railroad Commission Production Data Query, through Jul 2026.

  • Transmission line (2)

    98% · 287,421 mcf

  • Flared (4)

    2.2% · 6,341 mcf

2.2% of the gas flared in the 7 months reported. 2 months above 3%.

2 wells on this lease

Wells on BIG BERTHA 0310 E
API numberWell no.Status
42-461-43004502HActive
42-461-43007302HActive

SourceTexas Railroad Commission Wellbore Query.

Buyers and gatherers

Companies named on the Form P-4, by product
CompanyProductRoleShare%From
Plains Marketing, L.p.OilGathers100Aug 17, 2025
Energy Transfer CompanyCasinghead gasBuys100Aug 17, 2025
Energy Transfer CompanyCasinghead gasGathers100Aug 17, 2025

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

Who buys my oilOil price check

1,320.70 acres on the newest permit

An allocation well is on this lease

Permits for Big Bertha 0310 E
API numberWell no.Acreson the permit
42-461-43004502H1,320.70
42-461-43007302H1,320.70

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

Unit decimal checker

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7 months, newest first

Ledger for BIG BERTHA 0310 E
MonthOil producedbblOil soldbblGas producedmcfGas soldmcf, codes 2+3FlaredmcfWTI$/bblHenry Hub$/MMBtu
Jul 202617,14117,11446,66044,9651,695$80.46$2.89
Jun 202620,51120,57347,49346,0931,400$84.81$3.15
May 202624,49224,50454,54353,808735$102.13$2.94
Apr 202629,93729,84950,47149,635836$100.32$2.77
Mar 202644,54044,96845,73745,70334$91.38$3.04
Feb 202646,79846,68144,21342,6901,523$64.51$3.62
Jan 20268,3067,7924,6454,527118$60.04$7.72

Flared above 3%

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

OperatorFirebird Energy II LLCFieldSpraberry (Trend Area)CountyUpton County

Firebird Energy II LLC in Upton County

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Spraberry (Trend Area) field

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