Stored formation/play groups ranked by recorded well count, with recorded operators and primary counties. Coverage is limited to the groups included below.
Buckhead Energy analysis of public oil and gas data. Daily refresh scheduled. Stored source refresh: 2026-11-01.
Stored source refresh: 2026-11-01. 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. Figures are Buckhead Energy analysis of public oil and gas data; counts under 3 wells are withheld.
Buckhead Energy analysis of public oil and gas data. Scheduled refreshes do not guarantee that new regulator filings are available; the state regulator remains the record of any specific well.
Quick answer: The highest well-count groups listed for Wyoming are the Niobrara- Mowry, Mesaverde-Lance-Lewis, Muddy J Sand, Mesaverde-Lance and Powder River Basin, led by the Niobrara- Mowry with 76,491 wells on record. Ranked by well count across 23 tracked formations from Buckhead Energy analysis of public oil and gas data. Stored source refresh: 2026-11-01. These are limited stored records; reporting windows are evaluated at source refresh.
The highest well-count groups listed for Wyoming are the Niobrara- Mowry, Mesaverde-Lance-Lewis, Muddy J Sand, Mesaverde-Lance and Powder River Basin, led by the Niobrara- Mowry with 76,491 wells on record. Ranked by well count across 23 tracked formations from Buckhead Energy analysis of public oil and gas data. Stored source refresh: 2026-11-01. These are limited stored records; reporting windows are evaluated at source refresh.
Top Operators:
Eog Resources (6,887), Devon Energy Production Company (3,774), Wold Energy Partners (3,658), Anadarko Petroleum (3,193), Lance Oil & Gas Company (2,402), Fdl Operating (2,325), Contango Resources Company (1,963), Wrc Energy LLC (1,958), Anschutz Exploration (1,636), Yates Petroleum (1,572)
Primary counties: Campbell, Converse, Natrona, Johnson, Weston
Top Operators:
Crowheart Energy (3,438), Wamsutter E And P LLC (1,117), Noble Energy (875), Bpx Operating Company (819), Southland Royalty Company (708), Devon Energy Production Company (476), Wexpro Company (408), Rockies Resources Holdings (384), Amoco Production Company (337), Anadarko Petroleum (287)
Primary counties: Sweetwater, Carbon, Fremont, Converse, Sublette
Top Operators:
Anadarko Petroleum (2,691), Eog Resources (1,553), Wave Petroleum Operating (979), North Silo Resources LLC (907), Samson Resources Company (536), Longs Peak Resources (512), Gungnir Operating LLC (381), Fh Petroleum (303), Kaiserfrancis Oil Company (189), Rockies Holdings LLC (146)
Primary counties: Laramie, Goshen, Platte
Top Operators:
Purewest Resources INC (3,610), Jonah Energy (2,914), Ultra Resources (803), Shell Oil Company (292), Encana Oil & Gas (262), Qep Energy Company (161), Eog Resources (140), Saurus Resources (108), Pinedale Energy Partners Operating (91), Bpx Operating Company (75)
Primary counties: Sublette, Sweetwater, Uinta, Teton, Fremont
Top Operators:
Carbon Creek Energy (670), Davis Oil Company (348), Eog Resources (327), Anschutz Exploration (260), Pronghorn Operating (228), Osage Partners (206), Atx Energy Partners (175), True Oil (169), Nance Petroleum (124), Seven Sisters Oil & Gas (122)
Primary counties: Campbell, Weston, Johnson, Crook, Niobrara
Top Operators:
Hilcorp Energy Company (1,146), Eog Resources (872), Urban Oil & Gas Group (605), Anadarko Petroleum (469), Wexpro Company (386), Wy Basin Operating LLC (316), Breitburn Operating (281), Contango Resources Company (218), Fdl Operating (187), Cabot Oil & Gas (153)
Primary counties: Sweetwater, Sublette, Lincoln, Carbon, Uinta
Top Operators:
Merit Energy Company (1,563), Marathon Oil Company (638), Contango Resources Company (383), Citation Oil & Gas (299), Breitburn Operating (173), Bpx Operating Company (138), Granite Creek Energy LLC (115), Conocophillips Company (92), Vaquero Big Horn (82), New Era Petroleum (74)
Primary counties: Park, Hot Springs, Big Horn, Washakie, Sheridan
Top Operators:
Urban Oil & Gas Group (302), Amplify Energy Operating (283), Eog Resources (203), Crowheart Energy (159), Chevron (158), Wexpro Company (144), Purewest Resources INC (135), Marathon Oil Company (127), Hilcorp Energy Company (125), Red Desert Resources, LLC (109)
Primary counties: Carbon, Sweetwater, Sublette, Albany, Lincoln
Top Operators:
Contango Resources Company (290), Aethon Energy Operating (226), Brown Tom (223), Hilcorp Energy Company (208), Encana Oil & Gas (164), Burlington Resources Oil & Gas Company (114), Bill Barrett (100), Ovintiv USA INC (93), Adamas Energy LLC (88), Citation Oil & Gas (87)
Primary counties: Fremont, Natrona
Top Operators:
Merit Energy Company (471), Marathon Oil Company (278), Contango Resources Company (224), Citation Oil & Gas (97), Bpx Operating Company (94), Conocophillips Company (62), Breitburn Operating (59), Bareto Energy, LLC (58), Howell Petroleum (42), Husky Oil Company (42)
Primary counties: Park, Big Horn, Hot Springs, Washakie, Sheridan
Top Operators:
Urban Oil & Gas Group (212), Eog Resources (175), Hilcorp Energy Company (163), Chevron (116), Bcemach (103), Atlantic Richfield Company (91), Wexpro Company (82), Amplify Energy Operating (78), Bpx Operating Company (51), Purewest Resources INC (50)
Primary counties: Sweetwater, Sublette, Lincoln, Carbon, Fremont
Top Operators:
Gungnir Operating LLC (996), Eme Wyoming LLC (252), Bill Barrett (55), Rki Exploration & Production (23), Hesperus Energy Ii LLC (22), Petrovalues Wy LLC (21), Chesapeake Energy (20), Largo Exploration Resources LLC (18), Devon Energy Production Company (16), King Resources Company (15)
Primary counties: Goshen, Platte, Laramie, Sweetwater
Top Operators:
Bcemach (92), Urban Oil & Gas Group (91), Bpx Operating Company (90), Hilcorp Energy Company (86), Chevron (82), Eog Resources (66), North Shore Exploration & Production (48), Rocky Mountain Gas (30), Texaco Exploration And Production (22), Spire Storage West LLC (20)
Primary counties: Lincoln, Uinta
Top Operators:
Wesco Operating (73), Denbury Onshore (47), Wind River Energy (44), Devon Energy Production Company (29), Citation Oil & Gas (29), Bpx Operating Company (23), Beren (18), Conocophillips Company (17), Atlantic Richfield Company (15), Marathon Oil Company (15)
Primary counties: Fremont, Natrona, Hot Springs, Sweetwater
Top Operators:
Urban Oil & Gas Group (140), Exxon Mobil (63), Bpx Operating Company (46), Chevron (43), Eog Resources (39), Spring Valley Oil & Gas (33), Hilcorp Energy Company (27), Big Piney Oil & Gas Company (21), North Shore Exploration & Production (21), Wexpro Company (16)
Primary counties: Uinta, Sublette, Lincoln, Teton
Top Operators:
Kentex Worland LLC (53), Contango Resources Company (47), Devon Energy Production Company (33), Tenneco Oil Company (31), Bass Enterprises Production Company (17), Valkyrie Operating LLC (16), Kcs Mountain Resources (14), Cabot Oil & Gas (14), Washakie Energies Company (14), Carolholly Oil (12)
Primary counties: Washakie, Big Horn, Park, Hot Springs, Fremont
Top Operators:
Gungnir Operating LLC (27), Shell Oil Company (22), Samson Resources Company (16), Tallgrass High Plains Carbon Storage LLC (15), North Silo Resources LLC (14), Bison Iv Operating LLC (14), Longs Peak Resources (14), Prima Exploration (10), Phoenix Operating Company (10), Rockies Holdings LLC (7)
Primary counties: Laramie, Goshen, Platte, Campbell
Top Operators:
Longs Peak Resources (37), Bison Iv Operating LLC (23), Gungnir Operating LLC (8), True Oil (6), Exeter Drilling Company (6), Shell Oil Company (6), Griffin Drilling Company (4), Severson Petroleum Company (4), North Silo Resources LLC (4), Bill Barrett (4)
Primary counties: Laramie, Platte, Goshen, Converse, Niobrara
Top Operators:
Marathon Oil Company (17), Rock River Operating (16), Bitterroot Energy Partners LLC (8), Petcon Associates (8), Gibson J W (7), Chevron (6), Pds Resources LLC (6), Oklahoma Oil Company (5), Bpx Operating Company (3), Gravesdavis (3)
Primary counties: Albany, Carbon
Top Operators:
Marathon Oil Company (9), Mingo Oil Producers (8), Production Service & Equipment (7), Ames Oil & Gas (4), True Oil (3), St Mary Operating Company (3), Bpx Operating Company (3), Davis Oil Company (3), Antler Energy (—), Dyer J G (—)
Primary counties: Carbon
Top Operators:
Bpx Operating Company (7), Bill Barrett (6), Anadarko Petroleum (5), Hunt Oil Company (3), Garywilliams Oil Producer (3), Koch Exploration Company (3), Cirque Resources (3), Devon Energy Production Company (—), Exco Resources PA (—), Marathon Oil Company (—)
Primary counties: Big Horn, Park, Washakie, Hot Springs
Top Operators:
Wolf Energy Company (8), Six Ten Operating Company (8), New York Oil Company (4), Markley & Woodin (3), K & W Oil Company (3), Stanolind Oil & Gas Company (—), Bales Conrad E (—), Carrl Oil & Gas (—), Dyer J G (—), Sorrels Warren D (—)
Primary counties: Natrona, Carbon, Albany
Top Operators:
Exxon Mobil (5), Williams Exploration Company (3), American Beryllium Oil (—), Texaco Exploration And Production (—), Marmik Oil Company (—), The Tower Company (—), Bradco Oil & Gas Company (—), Kucheraeb (—), Tenneco Oil Company (—), Travis G (—)
Primary counties: Teton, Sublette
Source: Buckhead Energy analysis of public oil and gas data, 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: 2026-11-01.
The highest well-count formation/play groups listed for Wyoming are the Niobrara- Mowry, Mesaverde-Lance-Lewis, Muddy J Sand, Mesaverde-Lance and Powder River Basin, among others. This directory tracks 23 recorded formation/play groups ranked by well count, per Buckhead Energy analysis of public oil and gas data. Stored source refresh: 2026-11-01. These are limited stored records; reporting windows are evaluated at source refresh.
The Niobrara- Mowry has the most wells among the listed Wyoming groups — 76,491 wells, worked by 1,575 recorded operators, per Buckhead Energy analysis of public oil and gas data. This is a well-count ranking, not a reserves or value ranking. Stored source refresh: 2026-11-01. These are limited stored records; reporting windows are evaluated at source refresh.
The operators with the most wells on record in the Niobrara- Mowry are EOG Resources, Devon Energy Production Company, Wold Energy Partners, Anadarko Petroleum, Lance Oil & Gas Company. Each formation card below lists its top operators by well count. Stored source refresh: 2026-11-01. These are limited stored records; reporting windows are evaluated at source refresh.
A complete permit total is unavailable because one or more listed formation groups has an unknown permit count. Stored source refresh: 2026-11-01. 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: 2026-11-01. These are limited stored records; reporting windows are evaluated at source refresh.
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Get Your Free Written OfferState: Wyoming
Active formations: 23
Total wells: 150,400
Recent permits: —
Last refresh: 2026-11-01
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