Petrora

FORMATIONS · RRC WELLBORE FILE

Queen City

Reported as a top in 14,474 wells across 54 counties, at a median depth of 2,954 ft (960 to 5,800 ft in most wells). 779 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 →

14.5K
wells reporting a top
779
permitted in last 3 years
54
counties
2,954
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
Karnes
4,065
3,8592,454–6,440315
Webb
2,194
2,204900–4,485129
LA Salle
1,810
1,540852–2,60590
Zapata
1,290
2,7501,710–4,5012
Live Oak
996
3,7803,036–6,175101
Atascosa
981
1,600830–2,89096
McMullen
961
3,2082,270–5,10017
Duval
381
5,7205,015–6,9242
Frio
308
1,362942–2,1912
Starr
261
3,8322,350–7,8811
Nacogdoches
225
350211–4801
Jim Hogg
218
9,4205,700–9,9882
Bee
125
5,5504,356–6,7733
Houston
122
1,2601,205–1,6530
Washington
55
1,2241,074–1,4850
Wharton
53
9,7899,274–10,3630
Fayette
51
1,595730–2,0602
Gonzales
47
1,5061,246–2,5396
Polk
38
7,6162,400–7,8543
Wilson
38
7091–1,5761
Trinity
37
1,5541,377–1,8600
DE Witt
33
5,0703,953–6,5456
Anderson
30
362306–4010
Angelina
18
1,440565–1,8900
Goliad
16
6,3236,110–7,4000
Madison
15
1,1601,080–1,3500
Colorado
14
7,4484,544–8,2810
Jackson
12
8,6398,550–8,6500
Fort Bend
11
10,73010,425–11,3200
Lavaca
11
5,6553,670–7,7050
Dimmit
9
1,3201,064–1,3630
Montgomery
6
8,0296,070–8,3740
Zavala
6
2,4342,402–2,5220

Operators

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

OperatorLast 3 yrsAll
EOG Resources, Inc.2062,108
Burlington Resources O & G Co LP204929
Marathon Oil EF LLC1041,564
Devon Energy Production Co, L.P.62181
Kimmeridge Texas Gas, LLC4043
XTO Energy Inc.27187
Murphy Expl. & Prod. Co. - USA16265
Ageron Energy, LLC1640
BPX Operating Company1595
Repsol Oil & Gas USA, LLC1251
Tidal Petroleum, Inc.1036
Kimmeridge Texas Gas, LLC88
Ineos USA Oil & Gas LLC67
Silver Hill Energy Operating LLC511
Pillar Efs, LLC421
Verdun Oil & Gas LLC318
Troubadour Operating, LLC318
Merit Energy Company313
Rio Grande E&P II, LLC33
McA Petroleum Corporation238
Ventex Operating Corp.22
Killam Oil Co., Ltd.1199
Blackbrush O & G, LLC163
Sonerra Resources Corporation138
Unit Petroleum Company135

Recently permitted wells reporting the Queen City

BY LAST PERMIT ISSUED

Last permitLeaseOperatorCountyTop, ftAPI
Sep 30, 2026Mestena Oil & Gas CompanyCabot Petroleum CorporationJim Hogg9,42024731730
Sep 30, 2026WilsonSydri Operating, LLCLA Salle1,50228334182
Sep 16, 2026Sullivan UnitGouger Oil Company, LLCLive Oak5,44029733340
Jun 26, 2026Ultra-Mobil FeeUltra Oil & Gas, Inc.Duval6,13613138234
Apr 27, 2026TealSuemaur Operating LLCBee5,62502534085
Apr 16, 2026Moon PieSonerra Resources CorporationNacogdoches37834733545
Mar 5, 2026Bfmt EastEOG Resources, Inc.Webb1,35147945588
Mar 5, 2026Bfmt EastEOG Resources, Inc.Webb1,39547945589
Mar 5, 2026Bfmt EastEOG Resources, Inc.Webb1,38547945590
Mar 5, 2026Bfmt EastEOG Resources, Inc.Webb1,37747945591
Mar 5, 2026Bfmt EastEOG Resources, Inc.Webb1,38847945593
Feb 10, 2026Perlino AEOG Resources, Inc.Atascosa49001336263
Jan 23, 2026Pargmann - GislerPaloma Operating, LLCKarnes3,96025538359
Jan 20, 2026Rosa AEOG Resources, Inc.Webb62647945544
Jan 20, 2026Rosa BEOG Resources, Inc.Webb64447945545
Jan 20, 2026Rosa CEOG Resources, Inc.Webb62547945546
Jan 8, 2026Los Olmos RanchCircle-S Energy, LLCWebb1,49347945536
Jan 5, 2026Rafter Two a-B AW Ulw ABurlington Resources O & G Co LPLive Oak2,95629736555
Dec 31, 2025Rafter Two-Gomillion Ulw ABurlington Resources O & G Co LPLive Oak2,93529736556
Dec 29, 2025Rafter Two a-B Usw ABurlington Resources O & G Co LPLive Oak2,94629736552
Dec 29, 2025Rafter Two a-B Usw BBurlington Resources O & G Co LPLive Oak2,84029736553
Dec 29, 2025Rafter Two a-B Usw CBurlington Resources O & G Co LPLive Oak2,94729736554
Dec 22, 2025Three Rivers Unit HCaturus Energy, LLCLive Oak4,39329736551
Dec 18, 2025AI San RomanAgeron Energy, LLCWebb3,07347945522
Dec 18, 2025AI San RomanAgeron Energy, LLCWebb3,06947945523

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/queen-city, documented in the API reference.