GILMER (COTTON VALLEY SANDS) Field Activity and Well Summary

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Total wells

36
GILMER (COTTON VALLEY SANDS) field

Drill activity

—
drill dates not in our copy of this source

The GILMER (COTTON VALLEY SANDS) oil & gas field in Texas contains 36 wells on file.

Top operators: SABINE OIL & GAS CORPORATION, FOREST OIL CORPORATION, and others.

Most recent well: REYNOLDS C (AW), operated by SABINE OIL & GAS CORPORATION — last updated February 2026.

GILMER (COTTON VALLEY SANDS) field coverage

Counties the GILMER (COTTON VALLEY SANDS) field intersects.

Menard CountyHale CountyArmstrong CountyCalhoun CountyClay CountyOrange CountyGonzales CountyFannin CountyKerr CountyRefugio CountyJim Hogg CountyDimmit CountyNolan CountyBrazos CountyJefferson CountyBell CountyBandera CountyHidalgo CountySchleicher CountyGrayson CountyCrosby CountyDelta CountyZavala CountyRockwall CountyEastland CountyDeWitt CountyAngelina CountyMcLennan CountyLamar CountyLeon CountyStonewall CountyMcMullen CountySutton CountyFort Bend CountyParker CountyKinney CountyFayette CountyBriscoe CountyHarrison CountyReagan CountyColeman CountyOchiltree CountyCrane CountyWashington CountyLynn CountyMills CountyOldham CountySabine CountyHopkins CountyHouston CountyBexar CountyUpton CountyErath CountyRandall CountyRusk CountyCoryell CountyComal CountyAransas CountyJack CountyHemphill CountyShackelford CountySan Jacinto CountyKendall CountyWharton CountyFloyd CountyKarnes CountyKaufman CountyDuval CountyJohnson CountyFranklin CountyEdwards CountyWaller CountyMaverick CountyKleberg CountyGaines CountyMartin CountyBowie CountyAndrews CountyPotter CountyGarza CountyCaldwell CountyParmer CountyTitus CountyTerry CountyFoard CountyReal CountyCarson CountyKnox CountyHays CountyMedina CountyMotley CountyWichita CountyMidland CountyVictoria CountyTyler CountyFalls CountyPresidio CountyWillacy CountyLubbock CountyHenderson CountyWalker CountyGalveston CountyHarris CountyDawson CountyPecos CountyNacogdoches CountyGuadalupe CountyTarrant CountyJackson CountySwisher CountySterling CountyWinkler CountyFrio CountyLipscomb CountyCollingsworth CountyColorado CountyWise CountyGlasscock CountyShelby CountyComanche CountyBurnet CountyGray CountyHudspeth CountyCass CountyEllis CountyCooke CountyWilliamson CountyCochran CountyVan Zandt CountyDonley CountyJones CountyGrimes CountyIrion CountyNavarro CountyBrooks CountyDallam CountyHunt CountyMitchell CountyWood CountyChildress CountyJeff Davis CountyMontague CountyBrown CountyHaskell CountyFisher CountyConcho CountyCoke CountyPolk CountyCottle CountyYoung CountyLee CountyCherokee CountyHall CountyHood CountyArcher CountyBaylor CountySan Augustine CountyMadison CountyMilam CountyReeves CountyNueces CountyCamp CountyFreestone CountyRunnels CountyTerrell CountyDeaf Smith CountyMarion CountyLiberty CountyJasper CountyHansford CountyChambers CountyHardin CountyCollin CountyBrazoria CountyThrockmorton CountyBastrop CountyScurry CountyEctor CountyLimestone CountyDenton CountyRed River CountyMatagorda CountyHardeman CountyPalo Pinto CountyLive Oak CountySherman CountyUvalde CountyBailey CountyCulberson CountyAtascosa CountyWilson CountyStarr CountyDallas CountyKimble CountyMcCulloch CountyCrockett CountyHill CountyKent CountyEl Paso CountyLoving CountyDickens CountyLa Salle CountyLamb CountyAustin CountyHutchinson CountyVal Verde CountySmith CountyRobertson CountyGillespie CountyKing CountyTom Green CountyYoakum CountySomervell CountyKenedy CountyBorden CountySan Saba CountyBurleson CountyBee CountyTrinity CountyCastro CountyBrewster CountyGregg CountyWard CountyWilbarger CountyHamilton CountyStephens CountyLavaca CountyBosque CountyGoliad CountyRoberts CountyCallahan CountyRains CountyMorris CountyLampasas CountyUpshur — 36 wellsWheeler CountySan Patricio CountyMoore CountyWebb CountyBlanco CountyNewton CountyHockley CountyPanola CountyAnderson CountyCameron CountyMontgomery CountyLlano CountyMason CountyTaylor CountyHartley CountyJim Wells CountyZapata CountyTravis CountyHoward County
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Recent wells

Well Name County Last activity Updates Operator API
REYNOLDS C (AW) Upshur 2026-02-03 2 SABINE OIL & GAS CORPORATION 45931503
REYNOLDS B (AW) Upshur 2026-01-16 2 SABINE OIL & GAS CORPORATION 45931502
REYNOLDS A (AW) Upshur 2026-01-14 2 SABINE OIL & GAS CORPORATION 45931501
BARBER-GUNN (AW) Upshur 2026-01-13 2 not found 45931505
HIGHGROUND Upshur 2026-01-12 2 not found 45931507
LANDERS-ROCKY CREEK A (AW) Upshur 2024-12-03 4 SABINE OIL & GAS CORPORATION 45931498
LANDERS-CAMP A (AW) Upshur 2024-11-18 4 SABINE OIL & GAS CORPORATION 45931497
WERTZ-COLLIE A (AW) Upshur 2024-10-25 4 SABINE OIL & GAS CORPORATION 45931495
LANDERS UNIT Upshur 2024-07-30 ROSE CITY RESOURCES, LLC 45930771
WERTZ-BREYER (AW) Upshur 2023-07-05 4 SABINE OIL & GAS CORPORATION 45931494

Top Operators in the GILMER (COTTON VALLEY SANDS) field by total wells

SABINE OIL & GAS CORPORATION21FOREST OIL CORPORATION5SULPHUR RIVER EXPLORATION, INC.4HOWELL OIL & GAS, INC.1PATARA ANDOVER I LLC1ROSE CITY RESOURCES, LLC1SPICEWOOD OPERATING COMPANY, LLC1APACHE CORPORATION1TANOS EXPLORATION, LLC1not found1

Operators: Sabine Oil & Gas Corporation, Forest Oil Corporation, Sulphur River Exploration, Inc., Howell Oil & Gas, Inc., Patara Andover I Llc, Rose City Resources, Llc, Spicewood Operating Company, Llc, Apache Corporation, Tanos Exploration, Llc, Not Found.

Counties Intersected by the GILMER (COTTON VALLEY SANDS) field

Upshur36
Upshur

Other Major Fields in Texas most active by total wells

Compare the GILMER (COTTON VALLEY SANDS) field against the other busiest oil and gas fields in Texas: