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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 / GUAJILLO EAST

GUAJILLO EAST

RRC oil lease 17741, district 01 · EAGLEVILLE (EAGLE FORD-1) field · Atascosa County · operated by MARATHON OIL EF LLC

GUAJILLO EAST at a glance

Oil output in Mar 2026–May 2026 was down 62% from the same three months a year earlier. Over the last 12 months it reported 171,228 BBL of oil and 203,505 MCF of gas. In May 2026, the latest month not marked provisional, it reported 10,942 BBL and 9,657 MCF.

171.2KBBL oil, last 12 months▼ 46% vs prior 12
203.5KMCF gas, last 12 months▼ 61% vs prior 12
$1,093.25est. gross royalty for May 2026 at decimal
0new permits in Atascosa County this month

Royalty = (10,942 BBL × $97.31 WTI, Sep 2026, EIA + 9,657 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)

010K20K30K40KAug 23Feb 24Aug 24Feb 25Aug 25Feb 26

Gas (MCF per month, last 36 months)

020K40K60KAug 23Feb 24Aug 24Feb 25Aug 25Feb 26

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

GUAJILLO EAST production history in brief

By oil-equivalent volume over the last 12 months, GUAJILLO EAST ranks #21 of 1,245 reporting leases in Atascosa 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 Oct 2024 at 33,302 BBL. The lease is in the EAGLEVILLE (EAGLE FORD-1) field and is operated by MARATHON OIL EF 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)18,37113,965
Jun 2026 (provisional)17,01916,251
May 202610,9429,657
Apr 202611,71812,391
Mar 20263,5533,040
Feb 202612,42112,932
Jan 202613,68017,575
Dec 202514,55618,494
Nov 202517,30623,093
Oct 202516,98524,512
Sep 202518,55825,758
Aug 202516,11925,837
Jul 202523,57537,135
Jun 202519,86833,817
May 202524,15339,726
Apr 202523,97138,981
Mar 202521,42728,812
Feb 202522,98934,057
Jan 202524,77141,893
Dec 202428,53352,288
Nov 202430,45752,607
Oct 202433,30253,416
Sep 202428,51747,292
Aug 202433,03855,606
Jul 202425,74043,384
Jun 202420,95043,056
May 202423,48046,085
Apr 202425,23847,396
Mar 202429,16153,387
Feb 202425,18630,013
Jan 202421,81129,137
Dec 202323,13534,263
Nov 202322,03835,351
Oct 202323,79037,328
Sep 202322,68133,944
Aug 202325,68140,339

Check these figures in the RRC Production Data Query (Specific Lease Query: district 01, lease 17741). 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.