FORMATIONS · RRC WELLBORE FILE

Montoya

Reported as a top in 614 wells across 27 counties, at a median depth of 11,086 ft (7,736 to 14,387 ft in most wells). 3 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 →

614
wells reporting a top
3
permitted in last 3 years
27
counties
11,086
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
Winkler
72
9,3307,960–16,0871
Andrews
71
9,1668,056–12,1181
Pecos
70
12,1725,292–18,6700
Ward
56
13,62612,064–17,0710
Upton
48
11,76410,172–12,3881
Midland
44
12,39311,752–12,6360
Ector
39
8,4207,487–11,2480
Crane
32
5,3055,071–11,1000
Reeves
26
14,14611,459–16,1520
Martin
21
11,35010,792–12,0450
Howard
18
10,0349,881–10,4620
Crockett
16
8,4945,360–11,0710
Sterling
16
8,6568,473–9,0080
Dawson
14
10,55210,292–11,4540
Borden
11
9,7049,363–9,8200
Glasscock
11
11,08410,002–11,3240
Lynn
9
11,18210,894–11,2640
Gaines
8
12,30611,603–13,3830
Reagan
6
10,0969,368–10,3910
Loving
5
19,18818,953–19,7860
Terrell
5
12,8499,021–14,9320
Yoakum
5
11,97411,076–12,6870

Operators

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

Recently permitted wells reporting the Montoya

BY LAST PERMIT ISSUED

Last permitLeaseOperatorCountyTop, ftAPI
Aug 6, 2026O'HarrowPetx Operating LLCUpton10,64746101157
Feb 20, 2025Waddell Bros + CoFormentera Operations LLCWinkler9,95649532403
Feb 5, 2025Ratliff & BedfordShell Western E&P Inc.Andrews9,98000337545
Aug 30, 2023Baird, W. E.Pennzenergy Exp. & Prod., L.L.C.Winkler9,08249532782
Aug 10, 2023FlanaganPioneer Natural Res. USA, Inc.Martin11,81031732971
May 24, 2023Penwell UnitXTO Energy Inc.Ector7,48713501455
Jan 9, 2023LandlubberBlackbeard Operating, LLCCrane5,30010336625
Sep 26, 2022Connell, W.E. NCT-1XTO Energy Inc.Ector7,38313501450
Sep 8, 2022Penwell UnitXTO Energy Inc.Ector7,48713501456
Jul 25, 2022Millard-BPhillips Petroleum CompanyEctor7,52813507239
Jun 21, 2022University 18-6Siana Oil & GasWard17,65047530593
Mar 2, 2021Pecos Valley/5400 Dev./UnitP.o.&g. Operating, LLCPecos5,30037140293
Jul 29, 2020Millard DPhillips Petroleum CompanyEctor7,45913534375
Dec 18, 2019Barataria Bay SBlackbeard Operating, LLCCrane6,60310336567
Nov 21, 2019TR UE Blue SWDBlackbuck Resources LLCCulberson12,38810933588
Aug 22, 2019Lecroy SWDAqua Terra Permian, LLCWard16,93247511160
Aug 21, 2019M.F. HendersonStronghold Energy II Oper, LLCCrane8,54010334732
Jul 10, 2019Windham, R.S. 'A'Union Texas Petroleum Corp.Upton11,74846103903
Apr 3, 2019Brown & Altman Gas Unit No. 1XTO Energy Inc.Winkler9,85549502057
Mar 4, 2019Pecos BendParker & Parsley Development L.PCrane5,37210334501
Nov 6, 2018Butler -A-Tamarack Petroleum Company, Inc.Andrews13,43400335944
May 16, 2018KentLime Rock Resources IV-a, L.P.Andrews13,12700347819
Apr 27, 2018Rattlesnake AgiSanta FE Midstream Permian LLCYoakum11,97450136998
Apr 24, 2018Dr a Brighton 31 SWDChevron U. S. A. Inc.Culberson12,86210933316
Apr 6, 2018Meek 47AEndeavor Energy Resources L.P.Martin11,35031733372

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/montoya, documented in the API reference.