Petrora

FORMATIONS · RRC WELLBORE FILE

Oswego

Reported as a top in 1,471 wells across 8 counties, at a median depth of 10,126 ft (6,655 to 11,312 ft in most wells). 5 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 →

1.47K
wells reporting a top
5
permitted in last 3 years
8
counties
10,126
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
Hemphill
815
10,5309,441–10,8332
Wheeler
221
11,49010,865–12,0730
Roberts
162
8,1507,291–8,8470
Ochiltree
103
6,9066,585–7,5641
Sherman
62
5,4764,914–5,7951
Hansford
57
6,1355,947–6,6021
Lipscomb
48
7,8987,188–9,1360

Operators

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

OperatorLast 3 yrsAll
Mewbourne Oil Company280
Scout Energy Management LLC26
J-Brex Company13
Forest Oil Corporation0130
Noble Energy Production, Inc.0126
Patina Oil & Gas Corporation0120
Linn Operating, Inc.083
Devon Energy Production Co, L.P.055
Phillips Petroleum Company050
Cimarex Energy Co.048
Midgard Energy Company041
Samson Lone Star LP037
Unit Petroleum Company034
Range Production Company032
Conocophillips Company024
Samson Lone Star, LLC024
LE Norman Operating LLC023
Samson Resources Company019
Latigo Petroleum Texas, LP018
Cordillera Texas, L.P.016
Slawson, Donald C.016
Tenneco Oil Co.016
Texas American Resources Company015
Tecolote Energy Operating, LLC014
Apache Corporation013

Recently permitted wells reporting the Oswego

BY LAST PERMIT ISSUED

Last permitLeaseOperatorCountyTop, ftAPI
Jan 14, 2026Nix 72/71 AMewbourne Oil CompanyHemphill9,05421135679
Jan 14, 2026Nix 73/74 AMewbourne Oil CompanyHemphill9,05721135680
Sep 5, 2025Peterson JJ-Brex CompanyOchiltree7,18835733760
May 16, 2025Thor AScout Energy Management LLCHansford5,99019531808
Oct 2, 2024Coldwater Ranch UnitScout Energy Management LLCSherman5,46842130328
Sep 11, 2023Meek 238Devon Energy Production Co, L.P.Hemphill10,33321134890
May 5, 2023Kathryn 'A'Scout Energy Management LLCSherman5,50242130302
Apr 20, 2023Harper 32-232Ehvi Exploration, LLCHemphill10,06921135668
Nov 10, 2022Risley, Mamie PearlBracken Operating, L.L.C.Hemphill10,45921135667
Sep 27, 2022Wells AScout Energy Management LLCSherman5,30842130447
Jul 26, 2022Courson Herndon 656/577Mewbourne Oil CompanyOchiltree7,26535733744
Oct 11, 2021ElliottUpland Resources LLCHemphill9,24821135660
Sep 23, 2021LaddH & L Exploration Company, LLCOchiltree6,90635733729
Aug 27, 2021Courson Ranch 135Latigo Petroleum Texas, LPRoberts7,45539331831
Apr 17, 2020McMordieTenneco Oil Co.Roberts8,43439331038
Mar 10, 2020BaumannNatural Gas Anadarko, Inc.Ochiltree6,73135730976
Jan 22, 2020Lockhart 58Upland Resources LLCHemphill9,50021135299
Jun 3, 2019Hefley-Prater 32-33 MD CXTecolote Energy Operating, LLCHemphill10,89621135649
Jun 3, 2019Hefley-Prater 32-33 ME CXTecolote Energy Operating, LLCHemphill10,89621135650
May 22, 2019Harley Quinn 54Quanah Panhandle, LLCOchiltree6,66435733678
Mar 28, 2019Coldwater Ranch UnitScout Energy Management LLCSherman5,49042130343
Mar 11, 2019Roy Linn 653Mewbourne Oil CompanyOchiltree7,33735733706
Dec 31, 2018Hefley-Fillingim 39-40 MD CXTecolote Energy Operating, LLCHemphill10,90421135637
Dec 14, 2018Coldwater DScout Energy Management LLCSherman5,39442130391
Dec 10, 2018Francis 5859 EXLUnit Petroleum CompanyHemphill10,76221135641

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/oswego, documented in the API reference.