Petrora

FORMATIONS · RRC WELLBORE FILE

Tonkawa

Reported as a top in 4,121 wells across 10 counties, at a median depth of 7,152 ft (5,735 to 9,584 ft in most wells). 48 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 →

4.12K
wells reporting a top
48
permitted in last 3 years
10
counties
7,152
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
Lipscomb
1,351
6,6186,300–7,34117
Hemphill
1,002
8,1907,517–8,96212
Wheeler
689
9,6829,012–10,0831
Ochiltree
466
6,1045,501–6,8129
Roberts
362
7,0145,832–7,7748
Hansford
174
5,3505,136–5,5970
Sherman
38
4,8644,792–4,9711
Hutchinson
37
5,2935,018–5,7720

Operators

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

OperatorLast 3 yrsAll
Mewbourne Oil Company27316
Valpoint Operating, LLC77
Duncan Oil Properties, Inc.617
Unit Petroleum Company1158
Mmgl Txph, LLC163
Mmgl Txph, LLC138
Sanguine Gas Exploration, LLC136
Upland Resources LLC122
Texakoma E & P, LLC110
SGP Operating LLC16
Scout Energy Management LLC13
Chesapeake Operating, L.L.C.0248
Jones Energy, Ltd.0179
Samson Lone Star LP0115
Strat Land Exploration Company0110
Forest Oil Corporation0104
EOG Resources, Inc.099
LE Norman Operating LLC094
Laredo Petroleum, Inc.090
BP America Production Company083
Apache Corporation080
Phillips Petroleum Company077
Range Production Company065
Newfield Expl. Mid-Con. Inc064
Jones Energy, Ltd.063

Recently permitted wells reporting the Tonkawa

BY LAST PERMIT ISSUED

Last permitLeaseOperatorCountyTop, ftAPI
Apr 29, 2026DotUpland Resources LLCLipscomb6,27429534375
Feb 26, 2026Jones 11/16 AMewbourne Oil CompanyHemphill7,79621135682
Jan 14, 2026Nix 72/71 AMewbourne Oil CompanyHemphill7,40021135679
Jan 14, 2026Nix 73/74 AMewbourne Oil CompanyHemphill7,40621135680
Nov 12, 2025R.D. MillsSanguine Gas Exploration, LLCWheeler9,99248333051
Oct 20, 2025Kelln 201/152 AMewbourne Oil CompanyLipscomb7,14729534426
Sep 30, 2025Courson Herndon 567/578 AMewbourne Oil CompanyOchiltree6,39035733774
Aug 27, 2025Urschel 58/57 BMewbourne Oil CompanyHemphill7,68621135677
Aug 27, 2025Urschel-Studer 2/1 AMewbourne Oil CompanyHemphill7,68921135678
Aug 15, 2025StarDuncan Oil Properties, Inc.Lipscomb6,53429534425
Jul 14, 2025ArleneDuncan Oil Properties, Inc.Lipscomb6,65929534424
Jun 18, 2025Susan R. KaufmanMmgl Txph, LLCRoberts7,54339330128
May 13, 2025Johnson-Kelln 148/205 AMewbourne Oil CompanyLipscomb7,10029534423
Apr 29, 2025W. McMordie 127Valpoint Operating, LLCRoberts7,07739332789
Apr 23, 2025Mathers RanchMmgl Txph, LLCHemphill7,85621130060
Apr 3, 2025Michelle-Jones 91/86 AMewbourne Oil CompanyLipscomb7,52829534421
Apr 3, 2025Gossett 967Mewbourne Oil CompanyLipscomb6,52529534422
Apr 1, 2025Elmer Sparks-Bussard 63 AMewbourne Oil CompanyHemphill7,55021135675
Feb 26, 2025Urschel 58/57 AMewbourne Oil CompanyHemphill7,70321135674
Jan 17, 2025Courson Wermske 89 AMewbourne Oil CompanyOchiltree6,22835733773
Jan 16, 2025Courson Shieldknight 101Mewbourne Oil CompanyOchiltree6,49135733772
Dec 30, 2024RosieValpoint Operating, LLCRoberts6,85039332788
Nov 25, 2024Booth GDuncan Oil Properties, Inc.Lipscomb6,58929534420
Nov 19, 2024Kelln-Landers 206/235 AMewbourne Oil CompanyLipscomb7,05229534419
Nov 15, 2024RosieValpoint Operating, LLCRoberts6,87239332787

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/tonkawa, documented in the API reference.