Petrora

FORMATIONS · RRC WELLBORE FILE

Pearsall

Reported as a top in 152 wells across 18 counties, at a median depth of 9,330 ft (6,295 to 11,590 ft in most wells). 18 of those wells were permitted in the last three years.

A well counts if any of its completion filings report this formation, whether it produces from it or drilled through it. Depths are measured depth as filed; typo depths exist, which is why ranges are percentiles, not extremes. About completion reports →

152
wells reporting a top
18
permitted in last 3 years
18
counties
9,330
median top, ft

COMPUTED OCT 29, 2026 · REBUILT DAILY

Depth by county

Counties with at least five wells reporting the top. Bars are well counts.

CountyWellsMedian, ftP10–P90Last 3 yrs
Frio
41
9,4515,380–11,40017
Dimmit
28
9,3626,555–11,2581
Maverick
28
6,5945,911–8,6460
LA Salle
12
11,3977,095–11,8090
Zavala
10
6,7826,462–9,2420
McMullen
7
12,1047,000–13,7360
Atascosa
6
10,89410,166–11,4430

Operators

Current operator of record for wells reporting the top, ranked by wells permitted in the last three years.

OperatorLast 3 yrsAll
Formentera Operations LLC1313
Texas American Resources Company47
Weeks Environmental, LLC11
Chesapeake Operating, L.L.C.010
Cabot Oil & Gas Corporation010
Txco Resources Inc.08
CML Exploration, LLC08
EOG Resources, Inc.07
Anadarko E&P Company LP06
Cheyenne Petroleum Company05
Marathon Oil EF LLC05
Hat Creek Energy LLC04
Newfield Exploration Company03
Encana Oil & Gas(usa) Inc.03
Terry Resources, Inc.02
Murphy Expl. & Prod. Co. - USA02
Exploration Company, The02
Blackbrush O & G, LLC02
Aterra Exploration, LLC02
Cornerstone E & P Company, LP02
Union Dominion Oil Corporation01
U.S. Govt. Usaf Atc Lackland Afb01
Tidal Petroleum, Inc.01
Union Pacific Resources Company01
Union Gas Operating Company01

Recently permitted wells reporting the Pearsall

BY LAST PERMIT ISSUED

Last permitLeaseOperatorCountyTop, ftAPI
Apr 13, 2026Gambler-STX-UnitFormentera Operations LLCFrio9,06516334410
Apr 13, 2026Lucille-STX-Unit-AFormentera Operations LLCFrio9,11216334411
Mar 6, 2026Shelton UnitTexas American Resources CompanyFrio8,83516334404
Mar 6, 2026Shelton UnitTexas American Resources CompanyFrio8,81316334405
Feb 6, 2026Donut Palace-STX-UnitFormentera Operations LLCFrio9,21116334397
Feb 6, 2026Hooey-STX-Unit-CFormentera Operations LLCFrio9,45016334399
Dec 23, 2025Solana ATexas American Resources CompanyFrio10,16216334393
Dec 15, 2025LothropTexas American Resources CompanyFrio8,55316334392
Nov 24, 2025Revival-STX-Unit-AFormentera Operations LLCFrio9,34016334387
Oct 3, 2025Wrangler-STX-UnitFormentera Operations LLCFrio9,49616334382
Jul 15, 2025Pendleton-STX-UnitFormentera Operations LLCFrio9,19916334373
Jul 15, 2025Pendleton-STX-UnitFormentera Operations LLCFrio9,20816334374
Jul 11, 2025Pendleton-STX-UnitFormentera Operations LLCFrio9,17716334372
May 28, 2025Dimmit SWDWeeks Environmental, LLCDimmit10,84012739059
Mar 17, 2025Roper-STX-UnitFormentera Operations LLCFrio9,46616334364
Mar 17, 2025Roper-STXFormentera Operations LLCFrio9,45116334365
Feb 25, 2025Hooey-STX-UnitFormentera Operations LLCFrio9,49716334352
Jun 28, 2024Darlene 1-STXFormentera Operations LLCFrio9,89316334339
Apr 20, 2022Chittim HeirsCornerstone E & P Company, LPMaverick7,14032333028
Sep 7, 2021Wilmeth SWDPilot Water Solutions SWD LLCFrio8,55016334266
Apr 20, 2021HowettBuffco Production Inc.Zavala6,50050733220
Feb 24, 2020PalomaField Petroleum Corp.Maverick6,50032332391
Dec 16, 2019Carroll-Phillips CRosewood Resources, Inc.Frio11,40016334223
Feb 11, 2019Sabco Elaine SMWhite Marlin Operating Co, LLCDimmit9,33012734347
May 25, 2018Hce HM 03SHat Creek Energy LLCFrio11,40016334120

About this data

Formation tops, elevations, perforations, and casing from the RRC dbf900 wellbore file, refreshed weekly, with reported names normalized to Petrora's formation registry. County and operator breakdowns are rebuilt nightly.

Developers: this page as JSON is GET /v1/data/formations/pearsall, documented in the API reference.