Petrora

WATER · NOLAN COUNTY

Produced water and disposal in Nolan County

Every injection and disposal permit in the county, what each well is permitted to take, what its operator reported, and who is reporting daily. Earthquakes in the area →

Nolan County has 196 active injection and disposal wells, 41 of them permitted for disposal, with 549,689 barrels a day of permitted capacity.

Operators reported 13 million barrels injected on H-10 filings in the twelve months to June 2025, up 6% on the year before, about 6% of what the permits allow.

Grayrock Energy II, LLC is the largest injector in the county, with 4.2 million barrels reported across 71 active wells.

196
active injection wells, 41 for disposal
550K
bbl/d permitted capacity
13M
bbl reported, H-10 year to Jun 2025 +6%
6%
of permitted capacity used
851
UIC permits on file, all time

Reported injection, by month

H-10 FILINGS · TEN YEARS TO JUN 2025

Last 12 months 12,985,687 · prior 12 12,262,123(+6%)

01M2M2016201720182019202020212022202320242025

Who injects here

Operators with active permits in the county, by reported H-10 volume over the settled year.

OperatorReported, bblActive wellsCapacity bbl/d
Grayrock Energy II, LLC4.19M7185.8K
Scout Engy Management LLC3.79M2073.3K
Extex Oper Co1.25M1161K
D.K.D937K563.5K
Clear Fork, Inc757K724K
Citation Oil & Gas Corp488K2961.2K
Daylight Petro LLC336K25.5K
Patton, E. N. Oil Co, Inc330K15K
Double M Petroproperties, Inc259K28K
Sojourner Drlg. Corp194K317K
Lone Star Operations LLC117K36K
Gungoll, Carl E. Expl LLC62K226.4K
Goodrock Natural Res, LLC47.4K739.7K
Golden Oil and Ranch, LLC41.3K1500
DJ & T Services, LLC34.3K12K
Chisholm Oper, Inc33.1K11K
Williams Oil Co28.9K11K
Flat Top Operating, LLC24.1K110K
VX Oper, LLC15K1500
Nec Oper, LLC13.8K1300

Injection permits

851 UIC PERMITS · 196 ACTIVE · PAGE 1 OF 9

Active permits first, by reported volume, then cancelled, plugged, and never-activated permits.

WellOperatorStatusPurposeReported, bblbbl/d permittedZone, ftPermitted
Yard #1WDScout Engy Management LLCActiveDisposal1.3M10,0003,000–3,400Oct 25, 2013
CJR #1WExtex Oper CoActiveEnhanced recovery1.06M24,0006,900–7,600Aug 25, 2020
Oxo #6502Scout Engy Management LLCActiveDisposal636K5,0003,900–4,300Jan 24, 2018
Roscoe SWD #1D.K.DActiveEnhanced recovery542K20,0002,700–3,400Dec 2, 2022
McElmurray, W. W. #1 TScout Engy Management LLCActiveDisposal386K4,0003,150–3,400Feb 2, 2022
Boyd,c.e., Etal Palo Pinto Unit #344Clear Fork, IncActiveEnhanced recovery356K1,5005,820–5,870Sep 1, 1964
May #2Patton, E. N. Oil Co, IncActiveDisposal330K5,0003,440–3,810Jul 21, 2014
Robtann "D" #1Scout Engy Management LLCActiveDisposal281K2,0003,202–3,236Feb 1, 2017
Joe Young #22Scout Engy Management LLCActiveEnhanced recovery259K1,0004,106–4,120Jan 11, 2018
Brooks Ranch #3Double M Petroproperties, IncActiveEnhanced recovery228K5,0003,602–3,614Jul 9, 2018
Brown #5Scout Engy Management LLCActiveDisposal226K25,0004,414–4,458Aug 27, 2013
Boyd #1D.K.DActiveDisposal194K6,0003,150–4,595Dec 29, 2016
Rojean #3Scout Engy Management LLCActiveEnhanced recovery192K2,0005,050–5,100May 29, 2024
Lake Trammel Unit #107Grayrock Energy II, LLCActiveEnhanced recovery184K1,0005,141–5,290May 30, 2012
Price "D" #1WDaylight Petro LLCActiveEnhanced recovery183K2,5007,199–7,341May 7, 2004
Lake Trammel Unit #72Grayrock Energy II, LLCActiveEnhanced recovery181K1,5005,003–5,250May 30, 2012
Lake Trammel Unit #87WGrayrock Energy II, LLCActiveEnhanced recovery181K1,5004,900–5,600Sep 12, 2013
Oxo #4Clear Fork, IncActiveEnhanced recovery180K2,5006,546–6,630Feb 10, 2014
Lake Trammel Unit #45WGrayrock Energy II, LLCActiveEnhanced recovery180K1,5005,095–5,321Jan 24, 2011
Lake Trammel Unit #59Grayrock Energy II, LLCActiveEnhanced recovery177K1,5005,004–5,250Jul 19, 2012
Lake Trammel Unit #35Grayrock Energy II, LLCActiveEnhanced recovery177K1,5005,158–5,320May 14, 2012
Lake Trammel Unit #14Grayrock Energy II, LLCActiveEnhanced recovery175K1,0005,200–5,450Apr 12, 2023
Lake Trammel Unit #76Grayrock Energy II, LLCActiveEnhanced recovery173K1,5005,200–5,396Jul 19, 2012
Lake Trammel Unit #16Grayrock Energy II, LLCActiveEnhanced recovery171K1,0005,249–5,344May 29, 2012
Lake Trammel Unit #28Grayrock Energy II, LLCActiveEnhanced recovery171K1,5005,060–5,210May 14, 2012
Lake Trammel Unit #132Grayrock Energy II, LLCActiveEnhanced recovery171K1,5005,192–5,425May 30, 2012
Lake Trammel Unit #22WGrayrock Energy II, LLCActiveEnhanced recovery171K1,5005,153–5,360Jan 24, 2011
Lake Trammel Unit #5Grayrock Energy II, LLCActiveEnhanced recovery170K1,0005,250–5,344Jul 19, 2012
Lake Trammel Unit #266Grayrock Energy II, LLCActiveEnhanced recovery166K1,0005,210–5,427Oct 1, 2019
Texaco Fee #12Sojourner Drlg. CorpActiveEnhanced recovery165K5,0003,090–4,035Dec 2, 2022
Whitaker, E. G. #1 CScout Engy Management LLCActiveDisposal163K3,5003,350–3,370Jun 24, 1988
Lake Trammel Unit #160Grayrock Energy II, LLCActiveEnhanced recovery160K1,0005,275–5,450May 30, 2012
Lake Trammel Unit #49 WGrayrock Energy II, LLCActiveEnhanced recovery156K1,5005,280–5,409Nov 15, 2013
Arledge A #6Daylight Petro LLCActiveDisposal153K3,0003,400–5,200Feb 25, 2013
Lake Trammel Unit #66Grayrock Energy II, LLCActiveEnhanced recovery152K1,0005,350–5,449Mar 12, 2024
Lake Trammel Unit #57Grayrock Energy II, LLCActiveEnhanced recovery149K1,0005,028–5,174Aug 14, 2007
Lake Trammel Unit #46Grayrock Energy II, LLCActiveEnhanced recovery146K1,5005,260–5,410Jan 24, 2011
McElmurray, W. W. -B- #2Scout Engy Management LLCActiveDisposal139K10,0003,110–3,500May 20, 2014
Lake Trammel Unit #73WGrayrock Energy II, LLCActiveEnhanced recovery127K1,5005,070–5,260Jul 19, 2012
Lake Trammel Unit #56Grayrock Energy II, LLCActiveEnhanced recovery120K1,0005,066–5,146Jul 24, 2012
North Nena Lucia Unit #50Citation Oil & Gas CorpActiveEnhanced recovery113K1,0006,460–6,988Dec 15, 2003
Lake Trammel Unit #81WGrayrock Energy II, LLCActiveEnhanced recovery112K1,0005,000–5,275Oct 7, 2013
North Nena Lucia Unit #53Citation Oil & Gas CorpActiveEnhanced recovery106K1,5006,740–6,955May 13, 2009
Lake Trammel Unit #90RGrayrock Energy II, LLCActiveEnhanced recovery105K1,5005,210–5,411Jul 24, 2012
North Nena Lucia Unit #43Citation Oil & Gas CorpActiveEnhanced recovery101K1,8006,771–6,925May 12, 2009
Transwestern #2 #2D.K.DActiveDisposal97.9K10,0004,320–4,384Jun 20, 2013
Evb (Canyon Sand) Unit #1244Clear Fork, IncActiveEnhanced recovery91.2K5004,869–4,927Jun 11, 2010
Lake Trammel Unit #17Grayrock Energy II, LLCActiveEnhanced recovery76.9K1,5005,200–5,500Aug 12, 2011
Lake Trammel Unit #47Grayrock Energy II, LLCActiveEnhanced recovery76.7K1,0005,276–5,416May 29, 2012
Southwest Nena Lucia Unit #3122Citation Oil & Gas CorpActiveEnhanced recovery75.4K2,0006,950–7,110Mar 28, 1997
Jessie Little 'A' #9WIScout Engy Management LLCActiveEnhanced recovery74.7K1,0005,000–5,150May 19, 2017
Joe Young #20Scout Engy Management LLCActiveEnhanced recovery73.9K2,0004,182–4,187Aug 30, 2017
J.G. Adams #1D.K.DActiveDisposal73K25,0004,000–5,020Feb 6, 2013
Lake Trammel Unit #65Grayrock Energy II, LLCActiveEnhanced recovery72.6K1,5005,167–5,400May 30, 2012
Lake Trammel Unit #52Grayrock Energy II, LLCActiveEnhanced recovery70.5K1,5005,250–5,377May 9, 2014
Evb (Canyon Sand) Unit #3Clear Fork, IncActiveEnhanced recovery70.3K5,0002,800–4,838May 21, 2025
North Nena Lucia Unit #204Citation Oil & Gas CorpActiveEnhanced recovery70.1K1,5006,700–7,000Apr 22, 1998
Blackstone Sinclair #3Lone Star Operations LLCActiveEnhanced recovery65.6K2,0005,150–5,240Jul 6, 2019
Pete Frymire A #1Gungoll, Carl E. Expl LLCActiveDisposal62K6,4003,100–3,400Jul 11, 2022
Staton Price Unit #1Extex Oper CoActiveEnhanced recovery59.9K4,0005,468–5,570Mar 3, 2020
Lake Trammel Unit #234Grayrock Energy II, LLCActiveEnhanced recovery58.9K1,5005,352–5,384Oct 1, 2019
Evb (Canyon Sand) Unit #2Clear Fork, IncActiveEnhanced recovery46.6K5004,783–4,834Jun 24, 2010
Ludlum Unit #2Extex Oper CoActiveEnhanced recovery46K4,0004,200–4,300Oct 15, 2009
Amanda #2Golden Oil and Ranch, LLCActiveDisposal41.3K5003,566–3,810Jul 31, 2002
Jordan Ranch "H" #1DGoodrock Natural Res, LLCActiveDisposal40.4K3,5006,602–7,000Dec 19, 1984
Pace #1068Scout Engy Management LLCActiveDisposal38.4K1,5003,445–3,465Dec 11, 2024
Pritchard #2DJ & T Services, LLCActiveEnhanced recovery34.3K2,0003,350–3,362Mar 4, 2016
Lake Trammel Unit #78Grayrock Energy II, LLCActiveEnhanced recovery33.4K1,0005,244–5,382May 30, 2012
Enexco #2Chisholm Oper, IncActiveDisposal33.1K1,0004,400–5,000Jul 29, 2022
Hicks '183' A #7SWDouble M Petroproperties, IncActiveDisposal30.5K3,0004,480–4,910Mar 27, 2015
Jordan Ranch #2SWD.K.DActiveDisposal29.6K2,5004,810–4,916Jul 29, 2009
Rowan & Hope Unit #101AWilliams Oil CoActiveDisposal28.9K1,0004,000–4,500Jan 11, 1990
Lake Trammel Unit #68Grayrock Energy II, LLCActiveEnhanced recovery27.8K1,0005,017–5,135Sep 12, 2011
Lake Trammel Unit #55WGrayrock Energy II, LLCActiveEnhanced recovery26.8K1,5005,214–5,470May 14, 2012
Blackstone RR Unit #6Lone Star Operations LLCActiveEnhanced recovery26.4K2,0005,412–5,501Sep 8, 2017
Blackstone Sinclair #2Lone Star Operations LLCActiveEnhanced recovery24.8K2,0005,322–5,352Oct 24, 2011
Morrow #5Sojourner Drlg. CorpActiveDisposal24.7K2,0003,535–3,665Feb 29, 2000
Billie Magness #2AFlat Top Operating, LLCActiveDisposal24.1K10,0004,424–4,444Mar 10, 2017
County Line South #3Extex Oper CoActiveEnhanced recovery21.7K1,0005,720–5,742Apr 19, 2019
Thunder Valley North #7Extex Oper CoActiveEnhanced recovery21.1K5,0007,250–7,548Nov 25, 2019
Beall B #6Extex Oper CoActiveEnhanced recovery20K2,0005,800–5,896May 3, 2019
Lake Trammel Unit #2Grayrock Energy II, LLCActiveEnhanced recovery18.3K1,0005,250–5,278May 14, 2012
Southwest Nena Lucia Unit #1401WCitation Oil & Gas CorpActiveEnhanced recovery15.5K2,5006,878–7,062Apr 24, 1996
Meadows Unit #1VX Oper, LLCActiveDisposal15K5004,448–4,460Oct 27, 2021
Thornburg #1Nec Oper, LLCActiveEnhanced recovery13.8K3007,043–7,046Feb 28, 1997
Jessie Little 5 #8WIScout Engy Management LLCActiveEnhanced recovery13.6K1,0004,950–5,150May 18, 2017
Spence, R.Q. #2WShaida, John HActiveDisposal13.2K2503,844–3,860Feb 21, 2015
Foxtrot #741HExtex Oper CoActiveDisposal10.6K15,0004,250–4,750Sep 5, 2025
E. S. H. #4Clear Fork, IncActiveEnhanced recovery10.1K10,0005,866–6,106Apr 30, 1997
Beall B #5Extex Oper CoActiveEnhanced recovery8.72K2,0005,840–5,862Oct 31, 2024
Southwest Nena Lucia Unit #1214Citation Oil & Gas CorpActiveEnhanced recovery7.29K2,0006,655–6,968Mar 28, 1997
Turkey Track 186 #4Midland Oil and Gas, IncActiveDisposal7.25K1,0005,296–5,336Oct 20, 2009
East Maryneal Unit #1Lakeshore Operating, LLCActiveEnhanced recovery5.59K7005,120–5,217Aug 15, 2016
Chinquapin Strawn Unit #71Snow Oper Co., IncActiveEnhanced recovery5.26K1,5005,250–5,260Oct 15, 1997
Nolan "309" #3Sojourner Drlg. CorpActiveDisposal4.69K10,0003,701–3,914Apr 30, 2013
Thunder Valley West #1Extex Oper CoActiveEnhanced recovery4.41K1,5006,930–7,060Jan 1, 2019
Beall "A" #1Extex Oper CoActiveEnhanced recovery3.34K5005,798–5,830Jul 25, 2017
Good Hope Sand Unit #303WGoodrock Natural Res, LLCActiveEnhanced recovery2.57K9004,753–4,957Nov 6, 2025
Jordan, R. H. -A- #5Goodrock Natural Res, LLCActiveEnhanced recovery2.44K5,5004,585–4,650May 29, 2012
Petty, R. R. #23Goodrock Natural Res, LLCActiveEnhanced recovery1.97K10,0006,250–6,284Dec 21, 2005

Latest disposal drilling permits

W-1 drilling permits in the county tagged as produced-water disposal.

IssuedPermitOperatorLease / well
Apr 18, 2023889364D.K.D.Roscoe SWD #1 35333746
Dec 15, 2015812533Cinnabar Operating, LLCBrooks Ranch SWD #1D 35332304
Jul 28, 2015808692Santa Rita Holdings, LLCCox SWD #1 35333575
Jun 1, 1981119677A & a Transports, Inc.Sears, Lance "A" #1 D 35330140
Oct 17, 197960929Price, W. H.Whiteside #2D 35330739

About this data

RRC UIC well master and H-10 injection reports, settled through Jun 2025; TexNet daily injection for the last settled month; disposal permit tags from Petrora's sector classifier.

Developers: this page as JSON is GET /v1/data/water/tx/nolan, documented in the API reference.