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Niobrara County, WY oil and gas wells

3,091 wells: 299 active, 1,784 plugged, 13 orphaned, run by 542 operators.

Figures from the Wyoming Oil and Gas Conservation Commission, updated 2026-10-19.

Top operators in Niobrara

OperatorActiveWells here
SUNSHINE VALLEY PETROLEUM4595
JP OIL WYOMING LLC3362
FINLEY RESOURCES INC2946
BREITBURN OPERATING L.P.2838
HADLEY/JACKSON ENERGY LLC2428
USA ENERGY LLC1436
BULLOCK A O1429
M & K OIL COMPANY LLC1419
1876 RESOURCES LLC1119
CENTURY OIL AND GAS LLC10574
MILLENNIUM OIL & GAS LLC1036
NEW HORIZON RESOURCES LLC88
CHIPCORE LLC710
JOEMAR WYOMING OPERATING LLC710
ARENA RESOURCES LLC633
KREJCI HARRY L68
MURPHY SHELDON L & LORETTA59
SEEDY DRAW LLC55
REMUDA ENERGY DEVELOPMENT LLC436
ANTELOPE ENERGY COMPANY LLC45
O'BRIEN ENERGY RESOURCES CORPORATION224
ANT HILLS PRODUCTION213
DARRAH JOHN JAY JR213
ELLWOOD EXPLORATION LLC211
PROVIDENCE OIL DEVELOPMENT LLC24

Wells

Not plugged · All wells · Plugged · Orphaned

WellAPI / IDStatusTypeOperator
(no name) 1 49-027-05089Plugged OilMARATHON OIL COMPANY
(no name) 4 49-027-05133Plugged Oil—
(no name) 1 49-027-05177Plugged OilUNION OIL CO OF CALIFORNIA
(no name) 1 49-027-05192Plugged OilLUSK WYOMING OIL
(no name) 1 49-027-05196Plugged OilARGO PETROLEUM CORPORATION
(no name) 1 49-027-05332Plugged OilMARATHON OIL COMPANY
(no name) 2 49-027-05364Plugged OilBUCK CREEK OIL COMPANY
(no name) 1 49-027-05381Plugged OilCONOCO INC
(no name) 3 49-027-05384Plugged OilBUCK CREEK OIL COMPANY
(no name) 1 49-027-05391Plugged OilBOWSER PARK & SATTERFIELD W H
(no name) 2 49-027-05410Plugged OilBUCK CREEK OIL COMPANY
(no name) # 49-027-05415Plugged OilCONOCO INC
(no name) 1 49-027-05491Plugged OilTEXACO EXPLORATION & PROD
(no name) 1 49-027-05505Plugged OilARGO PETROLEUM CORPORATION
(no name) 1 49-027-05560Plugged OilMARATHON OIL COMPANY
(no name) 1 49-027-05639Plugged OilALLEN OIL
(no name) 1 49-027-05745Plugged OilEXPLORATIONS INC
(no name) 46-25 49-027-05830Plugged OilSIGNAL EXPLORATION INC
(no name) 1 49-027-05938Plugged OilHOLLY ENERGY INC
(no name) 1 49-027-05948Plugged OilSTERLING DRILLING
(no name) 1 49-027-05949Plugged OilMARATHON OIL COMPANY
(no name) 3 49-027-05960Plugged OilCHESTER OIL COMPANY
(no name) 1 49-027-05981Plugged OilBRIGGS H E
(no name) 5-A 49-027-20895Plugged OilANT HILLS PRODUCTION
(no name) 2 49-027-60016Plugged OilMARATHON OIL COMPANY
(no name) 1-M 49-027-60021Plugged InjectionCORONADO OIL COMPANY
(no name) 1 49-027-60022Plugged OilMARATHON OIL COMPANY
(no name) 1 49-027-60029Plugged OilWESTRANS PETROLEUM INC
(no name) 1 49-027-60032Plugged OilMARATHON OIL COMPANY
(no name) 1 49-027-60036Plugged OilWESTERN NATURAL GAS INC
1 FEDERAL GROVES 11-1 49-027-26880Cancelled / expired OilGEM EXPLORATION WY LLC
13-10 ZERBST FED 13-10 49-027-20617Temporarily abandoned OilZERBST JAMES E
20 MILE CREEK FED 2 49-027-26645Plugged Dry holeDAVIS PETROLEUM CORPORATION
2001- 39-66-29-32-SMO-1H 49-027-27294Cancelled / expired OilCENTURY OIL AND GAS LLC
2001- 39-66-30-31-SMO-1H 49-027-27312Cancelled / expired OilCENTURY OIL AND GAS LLC
2001- 39-66-30-31-SMO-2H 49-027-27313Cancelled / expired OilCENTURY OIL AND GAS LLC
2001- 39-66-30-31-SMO-3H 49-027-27314Cancelled / expired OilCENTURY OIL AND GAS LLC
2001- 39-66-30-31-SMO-4H 49-027-27315Cancelled / expired OilCENTURY OIL AND GAS LLC
2001- 39-66-30-31-SMU-1H 49-027-27316Permitted OilCENTURY OIL AND GAS LLC
2001- 39-66-30-31-SMU-2H 49-027-27317Cancelled / expired OilCENTURY OIL AND GAS LLC
2001- 39-66-30-31-SN-1H 49-027-27318Cancelled / expired OilCENTURY OIL AND GAS LLC
2001- 39-66-30-31-SN-2H 49-027-27319Cancelled / expired OilCENTURY OIL AND GAS LLC
2001- 39-66-30-31-SN-3H 49-027-27320Cancelled / expired OilCENTURY OIL AND GAS LLC
2001- 39-66-30-31-SN-4H 49-027-27321Cancelled / expired OilCENTURY OIL AND GAS LLC
2001- 39-66-30-31-ST-1H 49-027-27322Cancelled / expired OilCENTURY OIL AND GAS LLC
2001- 39-66-30-31-ST-2H 49-027-27323Cancelled / expired OilCENTURY OIL AND GAS LLC
2001- 39-66-30-31-ST-3H 49-027-27324Cancelled / expired OilCENTURY OIL AND GAS LLC
2001- 39-66-30-31-ST-4H 49-027-27325Cancelled / expired OilCENTURY OIL AND GAS LLC
2001- 39-66-30-31-ST-5H 49-027-27326Cancelled / expired OilCENTURY OIL AND GAS LLC
2001- 39-66-30-31-ST-6H 49-027-27327Cancelled / expired OilCENTURY OIL AND GAS LLC
2001- 39-66-30-31-ST-7H 49-027-27328Cancelled / expired OilCENTURY OIL AND GAS LLC
2001- 39-66-30-31-ST-8H 49-027-27329Cancelled / expired OilCENTURY OIL AND GAS LLC
2002- 39-66-29-32-SMO-2H 49-027-27295Cancelled / expired OilCENTURY OIL AND GAS LLC
2002- 39-66-29-32-SMO-3H 49-027-27296Cancelled / expired OilCENTURY OIL AND GAS LLC
2002- 39-66-29-32-SMO-4H 49-027-27297Cancelled / expired OilCENTURY OIL AND GAS LLC
2002- 39-66-29-32-SMU-1H 49-027-27298Cancelled / expired OilCENTURY OIL AND GAS LLC
2002- 39-66-29-32-SMU-2H 49-027-27299Cancelled / expired OilCENTURY OIL AND GAS LLC
2002- 39-66-29-32-SN-1H 49-027-27300Cancelled / expired OilCENTURY OIL AND GAS LLC
2002- 39-66-29-32-SN-2H 49-027-27301Cancelled / expired OilCENTURY OIL AND GAS LLC
2002- 39-66-29-32-SN-3H 49-027-27302Cancelled / expired OilCENTURY OIL AND GAS LLC
2002- 39-66-29-32-SN-4H 49-027-27303Cancelled / expired OilCENTURY OIL AND GAS LLC
2002- 39-66-29-32-ST-1H 49-027-27304Cancelled / expired OilCENTURY OIL AND GAS LLC
2002- 39-66-29-32-ST-2H 49-027-27305Cancelled / expired OilCENTURY OIL AND GAS LLC
2002- 39-66-29-32-ST-3H 49-027-27306Cancelled / expired OilCENTURY OIL AND GAS LLC
2002- 39-66-29-32-ST-4H 49-027-27307Cancelled / expired OilCENTURY OIL AND GAS LLC
2002- 39-66-29-32-ST-5H 49-027-27308Cancelled / expired OilCENTURY OIL AND GAS LLC
2002- 39-66-29-32-ST-6H 49-027-27309Cancelled / expired OilCENTURY OIL AND GAS LLC
2002- 39-66-29-32-ST-7H 49-027-27310Cancelled / expired OilCENTURY OIL AND GAS LLC
2002- 39-66-29-32-ST-8H 49-027-27311Cancelled / expired OilCENTURY OIL AND GAS LLC
2003- 39-66-28-33-SMO-1H 49-027-27186Cancelled / expired OilCENTURY OIL AND GAS LLC
2003- 39-66-28-33-SMO-2H 49-027-27187Cancelled / expired OilCENTURY OIL AND GAS LLC
2003- 39-66-28-33-SMO-3H 49-027-27188Cancelled / expired OilCENTURY OIL AND GAS LLC
2003- 39-66-28-33-SMO-4H 49-027-27189Cancelled / expired OilCENTURY OIL AND GAS LLC
2003- 39-66-28-33-SMU-1H 49-027-27190Cancelled / expired OilCENTURY OIL AND GAS LLC
2003- 39-66-28-33-SMU-2H 49-027-27191Cancelled / expired OilCENTURY OIL AND GAS LLC
2003- 39-66-28-33-SN-1H 49-027-27192Cancelled / expired OilCENTURY OIL AND GAS LLC
2003- 39-66-28-33-SN-2H 49-027-27193Cancelled / expired OilCENTURY OIL AND GAS LLC
2003- 39-66-28-33-SN-3H 49-027-27194Cancelled / expired OilCENTURY OIL AND GAS LLC
2003- 39-66-28-33-SN-4H 49-027-27195Cancelled / expired OilCENTURY OIL AND GAS LLC
2003- 39-66-28-33-ST-1H 49-027-27196Cancelled / expired OilCENTURY OIL AND GAS LLC
2003- 39-66-28-33-ST-2H 49-027-27197Cancelled / expired OilCENTURY OIL AND GAS LLC
2003- 39-66-28-33-ST-3H 49-027-27198Cancelled / expired OilCENTURY OIL AND GAS LLC
2003- 39-66-28-33-ST-4H 49-027-27199Cancelled / expired OilCENTURY OIL AND GAS LLC
2003- 39-66-28-33-ST-5H 49-027-27200Cancelled / expired OilCENTURY OIL AND GAS LLC
2003- 39-66-28-33-ST-6H 49-027-27201Cancelled / expired OilCENTURY OIL AND GAS LLC
2003- 39-66-28-33-ST-7H 49-027-27202Cancelled / expired OilCENTURY OIL AND GAS LLC
2003- 39-66-28-33-ST-8H 49-027-27203Cancelled / expired OilCENTURY OIL AND GAS LLC
2004- 39-66-27-34-SMO-1H 49-027-27564Cancelled / expired OilCENTURY OIL AND GAS LLC
2004- 39-66-27-34-SMO-2H 49-027-27565Cancelled / expired OilCENTURY OIL AND GAS LLC
2004- 39-66-27-34-SMO-3H 49-027-27566Cancelled / expired OilCENTURY OIL AND GAS LLC
2004- 39-66-27-34-SMO-4H 49-027-27567Cancelled / expired OilCENTURY OIL AND GAS LLC
2004- 39-66-27-34-SMU-1H 49-027-27568Cancelled / expired OilCENTURY OIL AND GAS LLC
2004- 39-66-27-34-SMU-2H 49-027-27569Cancelled / expired OilCENTURY OIL AND GAS LLC
2004- 39-66-27-34-SN-1H 49-027-27570Cancelled / expired OilCENTURY OIL AND GAS LLC
2004- 39-66-27-34-SN-2H 49-027-27571Cancelled / expired OilCENTURY OIL AND GAS LLC
2004- 39-66-27-34-SN-3H 49-027-27572Cancelled / expired OilCENTURY OIL AND GAS LLC
2004- 39-66-27-34-SN-4H 49-027-27573Cancelled / expired OilCENTURY OIL AND GAS LLC
2004- 39-66-27-34-ST-1H 49-027-27574Cancelled / expired OilCENTURY OIL AND GAS LLC
2004- 39-66-27-34-ST-2H 49-027-27575Cancelled / expired OilCENTURY OIL AND GAS LLC
2004- 39-66-27-34-ST-3H 49-027-27576Cancelled / expired OilCENTURY OIL AND GAS LLC

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