Every active oil and gas formation and play in Texas — Wolfcamp, Spraberry, Bone Spring, Eagle Ford, Austin Chalk, Haynesville, Barnett, and dozens more — ranked by well count, with the top operators and primary counties for each.
Refreshed monthly from TX RRC well records. Data current as of 2026-05-04.
Top Operators:
Oxy (23,632), Hilcorp Energy Company (10,579), Diamondback Energy (10,197), Pioneer Natural Resources (9,241), Bcemach Iii LLC (5,956), Crescent Energy Operating, LLC (4,851), Apache (4,506), Kinder Morgan Production (3,269), Burk Royalty (2,950), Cog Operating (2,770)
Primary counties: Andrews, Martin, Howard, Ector, Reagan
Top Operators:
Bkv Barnett LLC (4,282), Eagleridge Operating (2,793), Tep Barnett (2,727), Bkv North Texas LLC (2,084), Eog Resources (1,664), Basa Resources (1,389), Chesapeake Energy (1,284), Diversified Production LLC (1,141), Bkv Barnett Ii, LLC (1,113), Upp Operating LLC (1,102)
Primary counties: Archer, Young, Jack, Shackelford, Wise
Top Operators:
Hilcorp Energy Company (3,970), Exxon Mobil (3,349), Eog Resources (1,478), Denbury Onshore (1,091), Texas Petroleum Investment Company (978), Poandg Operating (932), Tc Oil Company (895), Highmark Energy Operating (868), Burlington Resources Oil & Gas Company (756), Marathon Oil Company (733)
Primary counties: Wharton, Harris, Jackson, Refugio, Hardin
Top Operators:
Eog Resources (3,729), Magnolia Oil & Gas Operating (2,061), Wildfire Energy Operating LLC (1,698), Javelin Energy (1,605), Marathon Oil Company (1,589), Ineos USA Oil & Gas LLC (1,438), Burlington Resources Oil & Gas Company (1,435), Great Plains Resources (1,313), Texas Petroleum Investment Company (1,245), Devon Energy Production Company (1,056)
Primary counties: Bexar, Caldwell, Atascosa, Guadalupe, Milam
Top Operators:
Pioneer Natural Resources (8,701), Two P Partners LLC (3,857), Formentera Operations LLC (3,478), Scout Energy Management (3,281), Blackbeard Operating (3,177), Kinder Morgan Production (2,735), Diamondback Energy (2,572), Oxy (2,241), Cog Operating (1,849), Apache (1,818)
Primary counties: Upton, Crane, Ector, Pecos, Midland
Top Operators:
Basa Resources (6,775), Tgnr East Texas LLC (1,523), Sheridan Production Company (1,316), Tgnr East Texas Ii LLC (996), Linder John Operating (897), Diversified Production LLC (885), Brookston Energy (832), Xto Energy (824), Eqv Operating LLC (740), 4sight Operating Company (658)
Primary counties: Gregg, Rusk, Panola, Harrison, Wood
Top Operators:
Large Operating LLC (3,025), Bcemach Iii LLC (1,894), Presidio Petroleum (1,539), Mmgl Txph LLC (1,451), Unbridled Resources LLC (1,206), Scout Energy Management (1,161), Ponderosa TX Operating (1,054), D10 Energy LLC (621), Petco Energy CORP (556), Pantera Energy Company (508)
Primary counties: Hutchinson, Gray, Hemphill, Wheeler, Carson
Top Operators:
Dara Operating Company, LLC (3,365), R2q Operating (1,599), Burk Royalty (880), Johnson & Ernst Operating Company (718), Quatro Oil And Gas (592), S&G Oil (559), Bastrop Oil & Gas (558), Waggoner Operating,LLC (442), Newport Operating (391), Stephens & Johnson Operating Company (386)
Primary counties: Wichita, Wilbarger, Hardeman, Foard, Hartley
Top Operators:
Upp Operating LLC (6,298), Scout Energy Management (2,625), Zarvona Energy (807), Red Stag Operating LLC (619), Oxy (523), Discovery Natural Resources (500), Robert C Brower (459), Extex Operating Company (411), Dominion Oklahoma Texas E And P (396), Henry Petroleum (318)
Primary counties: Crockett, Sutton, Schleicher, Edwards, Terrell
Top Operators:
Anadarko Petroleum (1,510), Apache (1,048), Wpx Energy (1,034), Permian Resources Operating LLC (1,033), Eog Resources (772), Pdeh LLC (717), Jetta Operating Company (698), Chevron (572), Noble Energy (508), Antelope Energy Partners LLC (505)
Primary counties: Reeves, Loving, Ward, Culberson, Winkler
Top Operators:
Chittim Operating LLC (1,609), Javelin Energy (1,191), Marathon Oil Company (619), Silverbow Resources Oper (427), Atlas Operating (401), 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 (711), Sun Explorationproduction Company (599), Urban Oil & Gas Group (592), Sueann Operating LC (524), Smith Production (331), Mobil Oil (264), Shell Oil Company (217)
Primary counties: Starr, Hidalgo, Nueces, Brooks, Kleberg
Top Operators:
Hilcorp Energy Company (2,717), Diversified Production LLC (1,958), Mmgl East Texas Ii, LLC (1,002), Basa Resources (978), 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:
Lewis Petro Properties (2,551), Silverbow Resources Oper (641), Varas Energy Operating Company, LLC (615), Hilcorp Energy Company (534), Bpx Operating Company (421), Eog Resources (394), Petrovybe Opco LLC (319), 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 (427), Eastwest Energy (321), Tgnr East Texas Ii LLC (193), Contour Energy (189), Adamas Energy LLC (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), Smith Production (293), Varas Energy Operating Company, LLC (242), Sueann Operating LC (232), Eog Resources (187), Chevron (184)
Primary counties: Webb, Zapata, Duval, Jim Hogg
Top Operators:
Scout Energy Management (2,494), Pantera Energy Company (894), Snw Operating Company (708), Large Operating LLC (396), High River Resources Operating LLC (388), J W Resources (340), Phillips Petroleum Company (332), Conocophillips Company (223), Mewbourne Oil Company (193), D10 Energy LLC (183)
Primary counties: Moore, Potter, Sherman, Hutchinson, Hansford
Top Operators:
V & H Oil (702), Wfw Production Company (669), Felderhoff Production Company (523), Sydri Operating (447), Bls Production (358), Bkm Production (315), Silver Creek Oil & Gas (243), Mountain Creek Oil Company (222), Burk Royalty Company (199), Jetta Operating Company (182)
Primary counties: Cooke, Grayson, Montague, Wichita, Collin
Top Operators:
Mewbourne Oil Company (801), Latigo Petroleum (794), Presidio Petroleum (555), Be Anadarko Ii LLC (433), Courson Oil & Gas (357), Unbridled Resources LLC (342), Highmark Energy Operating (327), Capturepoint LLC (221), Jones Energy (186), Diamond Chemicals Company (162)
Primary counties: Lipscomb, Ochiltree, Hansford, Hemphill, Nueces
Top Operators:
Basa Resources (714), 84 Energy LLC (532), Wildfire Energy Operating LLC (342), 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 (668), Mcmoran Oil & Gas (306), Gom Shelf (242), Fieldwood Energy (240), W & T Offshore (171), Exxon Mobil (168), Black Elk Energy Offshore Operations (151), Talos Energy Offshore (150), Sabine Oil & Gas (145), Oxy (144)
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 (929), R2q Operating (369), Hadley Oil Company (361), V & H Oil (317), Muirfield Exploration (297), Arch Operating (291), Mountain Creek Oil Company (256), Bridwell Oil Company (178), R & R Energy (156), Bkv Barnett LLC (103)
Primary counties: Montague, Clay, Denton, Jack, Wise
Top Operators:
Apache (244), Diamondback Energy (217), Durango Resources (211), 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), Bpx Operating Company (81), Devon Energy Production 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 (86), Daylight Petroleum (77), Stasney Well Service (60), Stephens & Johnson Operating Company (48), Texian Operating Company LLC (46), Basa Resources (44), Wt Waggoner Estate (42), Schkade Production Company (41), Scott Operating (40)
Primary counties: Shackelford, Archer, Baylor, Young, Stephens
Top Operators:
National Land Resources (151), 1859 Operating LLC (128), Thompsoncarlile Ventures (75), 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:
Burk Royalty (86), 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 (24), Permian Resources Operating LLC (23), Ring Energy (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, Blanco
Top Operators:
Tep Barnett (122), 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), Apollo Energy Operating Company (3), Enre (3), Patton Exploration (2), Willard Oil & Gas (2)
Primary counties: Motley, Floyd, Hale, Hall
Top Operators:
Riotex (17), Cashflow Exploration (7), C & C Energy Company (6), Everest Minerals (5), Sk & CO Oil & Gas Oper (5), Claro Operating (4), Mrt Exploration Company (3), Gose Steve (3), Stokes King (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), Winn Exploration (4), Windstar Resources (4), West Texas Gas (3), Cities Service Oil Company (2), Peacock O & G Properties (1), Camelot Oil And Gas (1)
Primary counties: Maverick
Source: Texas Railroad Commission well-header records, aggregated by primary play / interpreted formation / basin.
Threshold: Only formations with at least 50 wells are listed (excludes one-off wildcat plays).
Why it matters: Knowing which formation underlies your tract — and which operators are actively drilling that formation — is the foundation of mineral-rights valuation. Stacked-pay plays (Wolfcamp, Spraberry, Bone Spring) carry materially different upside than mature single-bench plays.
Refresh cadence: Monthly. Data current as of 2026-05-04.
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: 33
Total wells: 1,008,786
Recent permits: 17,069
Last refresh: 2026-05-04
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