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Data as of Jul 2026 production (Jun 2026–Jul 2026 provisional) · permits through Oct 14, 2026 · Source: Texas Railroad Commission · Methodology
Home / Operators / WESTBROOK SOUTHWEST UNIT

WESTBROOK SOUTHWEST UNIT

RRC oil lease 21120, district 10 · WESTBROOK field · Mitchell County · operated by GRAYROCK ENERGY II, LLC

WESTBROOK SOUTHWEST UNIT at a glance

Oil output in Mar 2026–May 2026 was up 3% from the same three months a year earlier. Over the last 12 months it reported 128,123 BBL of oil and 0 MCF of gas. In May 2026, the latest month not marked provisional, it reported 10,972 BBL and 0 MCF.

128.1KBBL oil, last 12 months▼ 3% vs prior 12
0MCF gas, last 12 monthsno prior data
$1,067.69est. gross royalty for May 2026 at decimal
0new permits in Mitchell County this month

Royalty = (10,972 BBL × $97.31 WTI, Sep 2026, EIA + 0 MCF × $2.95 Henry Hub, Sep 2026, EIA) × your decimal. 0.001 is only a placeholder: enter the decimal from your check stub or division order. Gross, before taxes and deductions. Full estimator →

Oil + condensate (BBL per month, last 36 months)

010K20KAug 23Feb 24Aug 24Feb 25Aug 25Feb 26

Gas (MCF per month, last 36 months)

01Aug 23Feb 24Aug 24Feb 25Aug 25Feb 26

Jun 2026 and Jul 2026 are provisional (lighter bars) and usually rise as late reports arrive.

WESTBROOK SOUTHWEST UNIT production history in brief

By oil-equivalent volume over the last 12 months, WESTBROOK SOUTHWEST UNIT ranks #13 of 392 reporting leases in Mitchell County. It reported production in 34 of the 34 non-provisional months shown, starting in our window in Aug 2023. Its peak oil month in that window was Nov 2023 at 12,933 BBL. The lease is in the WESTBROOK field and is operated by GRAYROCK ENERGY II, LLC; production is reported for the lease as a whole, not per well.

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New permits nearby

No new permits in this county in the current RRC daily file.

Monthly production

MonthOil (BBL)Gas (MCF)
Jul 2026 (provisional)9,6530
Jun 2026 (provisional)10,3660
May 202610,9720
Apr 202610,3570
Mar 202612,3290
Feb 20269,7150
Jan 20269,9070
Dec 202510,9230
Nov 202510,9700
Oct 202511,4510
Sep 202510,4330
Aug 202511,0470
Jul 202511,1980
Jun 202510,4790
May 202511,5100
Apr 202510,5880
Mar 202510,5170
Feb 20259,7860
Jan 202511,0320
Dec 202411,1040
Nov 202411,1770
Oct 202411,4080
Sep 202411,2200
Aug 202412,1900
Jul 202412,0800
Jun 202411,9210
May 202411,7160
Apr 202412,4510
Mar 202412,4310
Feb 202411,8190
Jan 202412,1110
Dec 202312,6960
Nov 202312,9330
Oct 202312,5440
Sep 202312,6570
Aug 202311,4620

Check these figures in the RRC Production Data Query (Specific Lease Query: district 10, lease 21120). Production is reported per lease, so a lease with several wells is not split by well.

Source: Texas Railroad Commission (data sets, Production Data Query). Data date: RRC Production Data Query dump, extract dated Sep 18, 2026; production through Jul 2026. Jun 2026 and Jul 2026 are provisional: operators file late and amend, so these months usually rise in later releases. Oil = crude oil + condensate (BBL); gas = gas-well gas + casinghead gas (MCF), as reported to RRC. Methodology.