Stored formation/play groups ranked by recorded well count, with recorded operators and primary counties. Coverage is limited to the groups included below.
Daily refresh scheduled from TX RRC well records. Stored source refresh: 2026-09-16.
Stored source refresh: 2026-09-16. Formation/play groups require at least 25 recorded wells and a known operator; the directory shows at most 50 groups ranked by well count. Operator counts reflect distinct recorded operator names, not verified current operations. Permit counts use the preceding 24 months at summary refresh. Grouping can represent a formation, play or basin; it is not an inventory of every geological formation. This is a capped directory of stored records, not a complete statewide count.
Compiled from Texas Railroad Commission records through a commercial well-data aggregator. Scheduled refreshes do not guarantee that new regulator filings are available. Use the source records to check a specific well.
Quick answer: The highest well-count groups listed for Texas are the Barnett, Permian Basin, Gulf Coast Basin (La - Tx), Austin Chalk and Thirty-One Carbonate-Chert, led by the Barnett with 156,159 wells on record. Ranked by well count across 41 tracked formations from Texas Railroad Commission (RRC) well-header records. Stored source refresh: 2026-09-16. These are limited stored records; reporting windows are evaluated at source refresh.
The highest well-count groups listed for Texas are the Barnett, Permian Basin, Gulf Coast Basin (La - Tx), Austin Chalk and Thirty-One Carbonate-Chert, led by the Barnett with 156,159 wells on record. Ranked by well count across 41 tracked formations from Texas Railroad Commission (RRC) well-header records. Stored source refresh: 2026-09-16. These are limited stored records; reporting windows are evaluated at source refresh.
Top Operators:
Bkv Barnett LLC (4,282), Eagleridge Operating (3,917), Tep Barnett (2,727), Bkv North Texas LLC (2,085), Eog Resources (1,664), Basa Resources (1,390), Chesapeake Energy (1,284), Bkv Barnett Ii, LLC (1,115), Upp Operating LLC (1,102), Mitchell Energy (1,097)
Primary counties: Archer, Young, Jack, Shackelford, Wise
Top Operators:
Oxy (9,781), Hilcorp Energy Company (5,227), Kinder Morgan Production (2,950), Pioneer Natural Resources (1,942), Citation Oil & Gas (1,729), Bcemach Iii LLC (1,710), Grayrock Energy Ii LLC (1,581), Apache (1,570), Lcs Production Company (1,550), Burk Royalty (1,455)
Primary counties: Andrews, Howard, Ector, Scurry, Jones
Top Operators:
Hilcorp Energy Company (3,983), Exxon Mobil (3,351), Eog Resources (1,549), Denbury Onshore (1,097), Radco Operations (962), Poandg Operating (931), Tc Oil Company (891), Highmark Energy Operating (869), Burlington Resources Oil & Gas Company (785), Marathon Oil Company (755)
Primary counties: Wharton, Harris, Jackson, Refugio, Hardin
Top Operators:
Eog Resources (3,777), Magnolia Oil & Gas Operating (2,070), Wildfire Energy Operating LLC (1,698), Javelin Energy (1,605), Marathon Oil Company (1,588), Ineos USA Oil & Gas LLC (1,440), Burlington Resources Oil & Gas Company (1,435), Great Plains Resources (1,313), Texas Petroleum Investment Company (1,245), Devon Energy Production Company (1,055)
Primary counties: Bexar, Caldwell, Atascosa, Guadalupe, Milam
Top Operators:
Pioneer Natural Resources (8,694), Two P Partners LLC (3,823), Formentera Operations LLC (3,416), Scout Energy Management (3,273), Blackbeard Operating (3,179), Diamondback Energy (2,572), Kinder Morgan Production (2,384), Hilcorp Energy Company (2,038), Apache (2,021), Cog Operating (1,850)
Primary counties: Upton, Crane, Ector, Pecos, Midland
Top Operators:
Basa Resources (6,766), Diversified Production LLC (2,098), Tgnr East Texas LLC (1,523), Tgnr East Texas Ii LLC (996), Linder John Operating (897), Brookston Energy (832), Xto Energy (824), Eqv Operating LLC (740), 4sight Operating Company (658), Chevron (614)
Primary counties: Gregg, Rusk, Panola, Harrison, Wood
Top Operators:
Large Operating LLC (3,014), Bcemach Iii LLC (1,894), Presidio Petroleum (1,524), Mmgl Txph LLC (1,451), Unbridled Resources LLC (1,200), Burk Royalty (1,134), Ponderosa TX Operating (915), D10 Energy LLC (621), Petco Energy CORP (556), Pantera Energy Company (508)
Primary counties: Hutchinson, Gray, Hemphill, Wheeler, Carson
Top Operators:
Pioneer Natural Resources (5,673), Diamondback Energy (5,542), Ovintiv USA INC (1,411), Cog Operating (1,151), Apache (990), Discovery Natural Resources (908), Oxyrock Operating, LLC (868), Crescent Energy Operating, LLC (862), Endeavor Energy Resources (708), New Height Energy LLC (677)
Primary counties: Martin, Reagan, Midland, Howard, Glasscock
Top Operators:
Waggoner Operating,LLC (3,770), R2q Operating (1,599), Burk Royalty (943), Johnson & Ernst Operating Company (718), Quatro Oil And Gas (592), S&G Oil (559), Bastrop Oil & Gas (558), Newport Operating (393), Stephens & Johnson Operating Company (386), Olenox CORP (333)
Primary counties: Wichita, Wilbarger, Hardeman, Foard, Hartley
Top Operators:
Oxy (7,374), Hilcorp Energy Company (3,613), Bcemach Iii LLC (1,270), Montare Operating LTD (1,042), Crescent Energy Operating, LLC (1,039), Burk Royalty (883), Ring Energy (682), Extex Operating Company (507), White Rock Oil & Gas (496), Scout Energy Management (495)
Primary counties: Andrews, Yoakum, Hockley, Gaines, Cochran
Top Operators:
Upp Operating LLC (6,296), Scout Energy Management (2,623), Zarvona Energy (801), Red Stag Operating LLC (619), Discovery Natural Resources (500), Hilcorp Energy Company (486), Robert C Brower (459), Extex Operating Company (410), Dominion Oklahoma Texas E And P (396), Henry Petroleum (318)
Primary counties: Crockett, Sutton, Schleicher, Edwards, Terrell
Top Operators:
Diamondback Energy (2,722), Pioneer Natural Resources (1,625), Apache (1,265), Permian Resources Operating LLC (1,188), Crescent Energy Operating, LLC (969), Anadarko Petroleum (800), Ovintiv USA INC (787), Cog Operating (785), Fasken Oil And Ranch (751), Oxyrock Operating, LLC (736)
Primary counties: Martin, Howard, Glasscock, Midland, Reeves
Top Operators:
Anadarko Petroleum (1,512), Apache (1,038), Wpx Energy (1,034), Permian Resources Operating LLC (1,033), Eog Resources (772), Pdeh LLC (714), Jetta Operating Company (699), Chevron (584), Noble Energy (508), Echo Energy Partners, LLC (493)
Primary counties: Reeves, Loving, Ward, Culberson, Winkler
Top Operators:
Chittim Operating LLC (1,609), Javelin Energy (1,191), Marathon Oil Company (619), Crescent Energy Operating, LLC (427), Atlas Operating (408), Prime Energy Company (312), Burlington Resources Oil & Gas Company (245), Lewis Petro Properties (232), Hilcorp Energy Company (230), Sm Energy Company (178)
Primary counties: Dimmit, Duval, Goliad, Live Oak, Maverick
Top Operators:
Exxon Mobil (2,214), Merit Energy Company (1,535), Eog Resources (902), Hilcorp Energy Company (822), Sun Explorationproduction Company (598), Urban Oil & Gas Group (590), Sueann Operating LC (524), Mountain V Texas, LLC (287), Mobil Oil (264), Shell Oil Company (217)
Primary counties: Starr, Hidalgo, Nueces, Brooks, Kleberg
Top Operators:
Hilcorp Energy Company (2,717), Diversified Production LLC (1,956), Mmgl East Texas Ii, LLC (1,002), Basa Resources (966), Xto Energy (768), Faulconer Energy LLC (618), Valence Operating Company (528), Linder John Operating (301), Urban Oil & Gas Group (288), Exxon Mobil (283)
Primary counties: Freestone, Smith, Limestone, Wood, Rusk
Top Operators:
Bcemach Iii LLC (2,443), Oxy (2,127), Hilcorp Energy Company (1,862), Texland Petroleum (632), Crossroads Operating LLC (590), Basa Resources (509), Juno Operating Company Ii (494), Surge Operating (419), Highmark Energy Operating (380), Grayrock Energy Ii LLC (366)
Primary counties: Mitchell, Gaines, Crosby, Scurry, Ector
Top Operators:
Lewis Petro Properties (2,551), Crescent Energy Operating, LLC (617), Varas Energy Operating Company, LLC (615), Hilcorp Energy Company (534), Bpx Operating Company (421), Eog Resources (394), Petrovybe Opco LLC (322), Marathon Oil Company (284), Ineos USA Oil & Gas LLC (241), Killam Oil (232)
Primary counties: Webb, Mcmullen, La Salle, Live Oak, Duval
Top Operators:
Corsicana Crude Company (553), Rife Oil Properties (497), J P Oil Company (472), Dry Creek Operating LLC (464), Exxon Mobil (428), Eastwest Energy (321), Adamas Energy LLC (207), Tgnr East Texas Ii LLC (204), Contour Energy (189), Sulphur River Exploration (162)
Primary counties: Navarro, Titus, Franklin, Falls, Wood
Top Operators:
Hilcorp Energy Company (3,095), Killam Oil (843), Conocophillips Company (494), Columbus Energy (454), Merit Energy Company (384), Mountain V Texas, LLC (270), Varas Energy Operating Company, LLC (248), Sueann Operating LC (232), Eog Resources (187), Chevron (184)
Primary counties: Webb, Zapata, Duval, Jim Hogg
Top Operators:
Burk Royalty (2,381), Pantera Energy Company (894), Snw Operating Company (709), Large Operating LLC (397), High River Resources Operating LLC (388), J W Resources (340), Phillips Petroleum Company (331), Conocophillips Company (223), Mewbourne Oil Company (196), D10 Energy LLC (183)
Primary counties: Moore, Potter, Sherman, Hutchinson, Hansford
Top Operators:
V & H Oil (702), Wfw Production Company (670), Felderhoff Production Company (526), Sydri Operating (448), Bls Production (355), Bkm Production (315), Silver Creek Oil & Gas (243), Mountain Creek Oil Company (222), Burk Royalty Company (199), Pyramid Enterprises (164)
Primary counties: Cooke, Grayson, Montague, Wichita, Collin
Top Operators:
Mewbourne Oil Company (800), Latigo Petroleum (794), Presidio Petroleum (555), Be Anadarko Ii LLC (433), Courson Oil & Gas (359), Unbridled Resources LLC (341), Highmark Energy Operating (320), Capturepoint LLC (221), Jones Energy (186), Diamond Chemicals Company (162)
Primary counties: Lipscomb, Ochiltree, Hansford, Hemphill, Nueces
Top Operators:
Basa Resources (714), Hd Operating CO, LLC (494), Wildfire Energy Operating LLC (341), Linder John Operating (284), Peles LLC (265), Caddo Energy (247), Highmark Energy Operating (204), Dg&E/Slocum (179), Union Oil Company Of California (168), Diversified Production LLC (149)
Primary counties: Anderson, Van Zandt, Cherokee, Robertson, Brazos
Top Operators:
Apache (489), Mcmoran Oil & Gas (307), White Fleet Operating LLC (285), Gom Shelf (242), Fieldwood Energy (230), W & T Offshore (174), Exxon Mobil (169), Black Elk Energy Offshore Operations (151), Talos Energy Offshore (150), Sabine Oil & Gas (145)
Primary counties: High Island South, High Island East & South, High Island Large Block, Matagorda Island Large Block, Galveston Large Block
Top Operators:
Peba Oil & Gas (928), R2q Operating (369), Hadley Oil Company (361), V & H Oil (319), Muirfield Exploration (298), Arch Operating (291), Mountain Creek Oil Company (256), Bridwell Oil Company (178), R & R Energy (156), Bkv Barnett LLC (111)
Primary counties: Montague, Clay, Denton, Jack, Wise
Top Operators:
Oxy (2,171), Aghorn Operating (475), Fasken Oil And Ranch (199), Hilcorp Energy Company (182), Basin Oil & Gas (173), Reverence Operating LLC (159), Digital Operating Company LLC (144), Scout Energy Management (138), United Oil & Shale LLC (121), Texland Petroleum (95)
Primary counties: Ector, Andrews, Reagan, Crockett, Howard
Top Operators:
Bcemach Iii LLC (294), Burk Royalty (286), Three R Oil Company (250), Rjd Management (197), Aviator Energy, LLC (186), Oxy (162), Oilex Intl Investments (136), Citation Oil & Gas (128), New Height Energy LLC (98), Trinidad Energy LLC (89)
Primary counties: Garza, Howard, Scurry, Gaines, Andrews
Top Operators:
Apache (244), Diamondback Energy (217), Durango Resources (212), Double Barrel Oil Company (147), Longfellow Energy (136), Xto Energy (104), Eog Resources (87), Stablerock Energy (75), Gordy Oil Company (73), Petrohunt Permian LLC (70)
Primary counties: Pecos, Reeves, Culberson, Ward, Val Verde
Top Operators:
Marathon Oil Company (510), Repsol Oil & Gas Canada (277), Pioneer Natural Resources (168), Blackbrush O & G (88), Capital Star Oil & Gas (87), Burlington Resources Oil & Gas Company (82), Devon Energy Production Company (81), Bpx Operating Company (81), Trio Consulting & Managementllc (54), Rusk Energy Operating (52)
Primary counties: Karnes, De Witt, Lavaca, Colorado, Bee
Top Operators:
Rigged Up, LLC (202), Waggoner Operating,LLC (95), Apex Resources (72), Stasney Well Service (69), Stephens & Johnson Operating Company (48), Texian Operating Company LLC (46), Basa Resources (44), Wt Waggoner Estate (43), Scott Operating (41), Schkade Production Company (41)
Primary counties: Shackelford, Archer, Baylor, Young, Stephens
Top Operators:
Diamondback Energy (658), Ovintiv USA INC (196), Apache (180), Cog Operating (144), Pioneer Natural Resources (142), Xto Energy (77), Crescent Energy Operating, LLC (55), Oxy (55), New Height Energy LLC (54), Sm Energy Company (53)
Primary counties: Martin, Reagan, Dawson, Howard, Midland
Top Operators:
National Land Resources (151), 1859 Operating LLC (128), Thompsoncarlile Ventures (76), Dixie Energy (61), Wilson Roger B (49), Slick (40), Mixon Robert N (38), Snd Operating (37), Bosque Oil Company (33), Kiowa Oil & Gas (33)
Primary counties: Ellis, Red River, Mclennan, Medina, Hill
Top Operators:
Dallas Production (77), Somerset Operating, LLC (55), Upham Oil & Gas Company (48), Taylor Ben J (45), Arrowhead Production (44), Rkw Operating (38), Devon Energy Production Company (31), Mitchell Energy (29), Raw Energy (27), Eog Resources (25)
Primary counties: Parker, Palo Pinto, Jack
Top Operators:
Oxy (163), Bcemach Iii LLC (78), Conocophillips Company (56), Hilcorp Energy Company (45), Contango Resources Company (45), Lynx Operating (42), Oneok Exploration Company (35), Eagle Natural Resources LLC (34), Crescent Energy Operating, LLC (30), Hicon Gas Producers (28)
Primary counties: Andrews, Gaines, Howard, Mitchell, Hockley
Top Operators:
Burk Royalty (87), Coterra Energy INC (75), Manzano (71), Hunt Cimarron (70), Q Natural Resources LLC (57), Capitan Energy Incorporated (56), Db Oil Company (31), Team Operating LLC (23), Ring Energy (23), Permian Resources Operating LLC (23)
Primary counties: Winkler, Culberson, Yoakum, Cochran, Reeves
Top Operators:
Felderhoff Production Company (63), Geosurveys (28), Sullivan Hollis R (23), Bruno Earl R (14), Aeternum Energy LLC (13), Bowerman Energy Company (12), B&B Aceite (10), Quaise Energy INC (10), Bowerman Oil & Gas (9), Sunbelt Exploration (8)
Primary counties: Mcculloch, San Saba, Burnet, Gillespie, Mason
Top Operators:
Tep Barnett (126), Sage Natural Resources (19), Gha Barnett (16), Quicksilver Resources (9), Eagleridge Operating (7), Chesapeake Energy (7), Upp Operating LLC (5), Bkv North Texas LLC (4), Morris R Greenhaw Oil&Gas (3), Delta Oil & Gas (2)
Primary counties: Tarrant, Johnson, Erath, Somervell, Wise
Top Operators:
Esco Oil Operating Company (22), Dry Fork Production (8), Sabine Production Company (8), Tyner Texas Operating Company (6), Bass Petroleum (5), West Texas Royalties (4), Enre (3), Apollo Energy Operating Company (3), Cockrell (2), Patton Exploration (2)
Primary counties: Motley, Floyd, Hale, Hall
Top Operators:
Riotex (17), Cashflow Exploration (7), C & C Energy Company (6), Sk & CO Oil & Gas Oper (5), Everest Minerals (5), Claro Operating (4), Stokes King (3), Mrt Exploration Company (3), Gose Steve (3), Devon Energy Production Company (3)
Primary counties: Kerr, Real, Bandera, Kendall
Top Operators:
Newfield Exploration Midcon (12), Machiiross Petroleum Company (8), Grace Oil (7), Texcan Resources (6), Windstar Resources (4), Winn Exploration (4), West Texas Gas (3), Cities Service Oil Company (2), Belco Energy (1), Grace Exploration Company (1)
Primary counties: Maverick
Source: Texas Railroad Commission well-header records, aggregated by primary play / interpreted formation / basin.
Threshold: Groups require at least 25 recorded wells and a known operator. The directory shows up to 50 groups by well count; omitted groups are not evidence of no activity.
Owner context: These formation summaries describe reported activity. They do not establish ownership, payment entitlement or a value for an individual tract.
Refresh cadence: Daily refresh scheduled. Stored source refresh: 2026-09-16.
The highest well-count formation/play groups listed for Texas are the Barnett, Permian Basin, Gulf Coast Basin (La - Tx), Austin Chalk and Thirty-One Carbonate-Chert, among others. This directory tracks 41 recorded formation/play groups ranked by well count, per Texas Railroad Commission (RRC) records. Stored source refresh: 2026-09-16. These are limited stored records; reporting windows are evaluated at source refresh.
The Barnett has the most wells among the listed Texas groups — 156,159 wells, worked by 10,392 recorded operators, per TX RRC well-header data. This is a well-count ranking, not a reserves or value ranking. Stored source refresh: 2026-09-16. These are limited stored records; reporting windows are evaluated at source refresh.
The operators with the most wells on record in the Barnett are Bkv Barnett LLC, Eagleridge Operating, Tep Barnett, Bkv North Texas LLC, EOG Resources. Each formation card below lists its top operators by well count. Stored source refresh: 2026-09-16. These are limited stored records; reporting windows are evaluated at source refresh.
About 16,248 drilling permits were filed across the tracked Texas formations in the 24-month window at source refresh, per TX RRC records — a rough measure of where new activity is concentrated. Stored source refresh: 2026-09-16. These are limited stored records; reporting windows are evaluated at source refresh.
Your deed and county records determine which formations your mineral rights cover; a tract can own multiple stacked formations. This directory is informational only, not a valuation. Stored source refresh: 2026-09-16. These are limited stored records; reporting windows are evaluated at source refresh.
The geology under your tract drives your valuation. Get a free written offer based on your specific formation and county.
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State: Texas
Active formations: 41
Total wells: 1,011,178
Recent permits: 16,248
Last refresh: 2026-09-16
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