Petrora

FORMATIONS · RRC WELLBORE FILE

Oakville

Reported as a top in 1,400 wells across 33 counties, at a median depth of 2,750 ft (1,000 to 3,300 ft in most wells). 33 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 →

1.4K
wells reporting a top
33
permitted in last 3 years
33
counties
2,750
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
Refugio
853
2,7502,750–3,30031
San Patricio
113
3,2452,160–3,7000
Victoria
81
2,2901,570–3,7501
Nueces
65
3,5502,600–4,0000
Bee
45
1,840582–2,5860
Austin
35
900160–1,0861
Fayette
35
630514–6840
Wharton
33
300280–3,4000
Goliad
25
1,8801–2,8970
Jim Wells
23
1,815692–2,2000
Duval
16
565176–1,3700
Brazoria
9
3,9513,128–5,6920
Brooks
8
1,3541,191–2,2600
Calhoun
8
11–4,1540
Hidalgo
8
4,0753,367–4,1940
DE Witt
7
2,6001,295–2,9780
Colorado
6
858300–3,0250
Live Oak
5
470379–1,1060

Operators

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

OperatorLast 3 yrsAll
Quintana Pet. Corp.19525
Hilcorp Energy Company9174
T-C Oil Company, LLC365
Big Lake Corporation16
Enhanced Energy Partners Corp14
Texaco Inc.049
Geronimo Oil Co.026
JRP Production, LLC016
Arriola Operating & Consltg Inc.015
TXO Production Corp.014
Exxon Corp.013
Sun Expl. & Prod. Co.-Corpus010
Venus Oil Company010
American Shoreline, Inc.09
Finger Oil & Gas, Inc.08
Vannoy & Assoc., Inc.08
Texaco Producing Inc.07
Pace West Production LC07
Geiser, D. Allen07
Cotton, W. L.06
Pennzoil Exploration & Prod. Co.05
Mandarin Oil & Gas Company05
Warrior Oil & Gas Corporation05
Pennzoil Producing Co.05
North Shore Energy, L.L.C.05

Recently permitted wells reporting the Oakville

BY LAST PERMIT ISSUED

Last permitLeaseOperatorCountyTop, ftAPI
Sep 25, 2026Tom O'Connor (5800 SD) Fld. UnitHilcorp Energy CompanyRefugio4,10039100683
Sep 14, 2026Oconnor, Thomas -C-Hilcorp Energy CompanyRefugio2,75039101564
Aug 13, 2026Walton, J.C. 'A'Enhanced Energy Partners CorpAustin96201531079
Jul 27, 2026Salinas, J.Big Lake CorporationVictoria2,89046933965
Jul 22, 2026Tom O'Connor (5800 SD) FLD UnitQuintana Pet. Corp.Refugio2,75039101159
Sep 26, 2025Clay Pasture -B- State UnitT-C Oil Company, LLCRefugio2,28039132876
Sep 18, 2025Tom Oconnor (5800SD) Fld. UnitQuintana Pet. Corp.Refugio2,75039102036
Sep 10, 2025Tom Oconnor (5800SD) Fld. UnitQuintana Pet. Corp.Refugio2,75039101579
Aug 5, 2025Tom Oconnor (5800 SD) Fld. UnitHilcorp Energy CompanyRefugio3,30039132502
Jul 18, 2025O'Connor -H-T-C Oil Company, LLCRefugio2,01139132949
Feb 19, 2025Clay Pasture -B- State UnitT-C Oil Company, LLCRefugio2,31039132932
Dec 12, 2024Tom Oconnor (5800 SD) Fld. UnitQuintana Pet. Corp.Refugio2,75039100703
Dec 9, 2024Williams, Maude et al "A"Quintana Pet. Corp.Refugio2,75039100207
Oct 29, 2024Tom Oconnor (5800 SD) Fld. UnitQuintana Pet. Corp.Refugio2,75039131896
Oct 14, 2024Williams, Maude Etal -A-Hilcorp Energy CompanyRefugio2,75039104013
Jul 29, 2024Williams, Maude Etal -A-Hilcorp Energy CompanyRefugio2,75039132648
Jul 1, 2024Tom O'Connor (5800'SD)FIELD UnitQuintana Pet. Corp.Refugio2,75039131923
Jun 18, 2024Tom Oconnor (5800 SD) Fld. UnitQuintana Pet. Corp.Refugio2,75039100570
Jun 18, 2024Tom O'Connor (5800'SD)FIELD UnitQuintana Pet. Corp.Refugio2,75039130315
Jun 11, 2024Oconnor, Thomas -C-Hilcorp Energy CompanyRefugio2,75039101153
Apr 19, 2024Tom OCONNOR(5800 Sand)field UnitQuintana Pet. Corp.Refugio2,75039101514
Apr 18, 2024Tom O'Connor (5800 SD) Fld. UnitQuintana Pet. Corp.Refugio2,75039101520
Apr 17, 2024Tom O'Connor (5800 SD) FLD UnitQuintana Pet. Corp.Refugio2,75039100707
Mar 18, 2024Tom Oconnor (5800 SD) Fld. UnitQuintana Pet. Corp.Refugio2,75039101152
Mar 5, 2024Tom O'Connor (5800 SD) FLD UnitQuintana Pet. Corp.Refugio2,75039131248

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/oakville, documented in the API reference.