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Corporate Name Change & Merger Index

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Company Name
(OLD NAME)
Changed or Merged To
(NEW NAME)
Date of
BLM WY
Decision or
Cover Memo
BLM State
Office that
Issued
Decision
Eagle Exploration CoCentury Oil & Gas Corp10/23/1978
01/25/1979
CO
WY
Eason Oil Company an Oklahoma CorporationEason Oil Company a Delaware Corporation11/01/2004
12/09/2004
WY
NM
East Resources Management LLCSWEPI, LP02/23/2011
05/06/2011
CO
WY
Eastern States Oil & Gas, Inc.EQT Production Company04/18/2011 
04/21/2011 
ES
WY
EBDL, IncJ Walter Duncan, Jr. Inc.01/20/1989WY
Echo Oil CorporationMaynard Oil Company08/15/1980WY
Echo Oil CorporationEcho Oil Division Maynard Oil Company09/28/1979WY
Eckels, Robert ERobert E Eckels Family Trust07/23/2001WY
Eckels, Robert ERobert E Eckels Marital Trust07/23/2001WY
Ecological Engineering Systems, Inc.WGP, Inc.10/07/1987WY
Edisto Expl & Prod CoForcenergy Inc03/10/1998WY
EDP Operating LtdCancelled07/29/2002MT
EEH Newco LLCEnCana Oil & Gas (USA) Inc03/15/2005 CO
EEX CorpNewfield Operating Company
Montana Notice
Wyoming Notice
(Amended Wyoming Notice)

06/30/2003
07/10/2003
06/08/2009

MT
WY
WY
Einarsen, Charles A. (Albert)Estate of Charles A. (Albert) Einarsen, Mildred Rosetta (R.)Einarsen Sole Beneficiary06/26/2009WY
Elk Production LLC Elk Production Uintah, LLC10/06/2011
11/03/2011
UT
WY
Elk Production LLCNew Cisco Production, LLC  10/06/2011
11/03/2011
UT
WY
El Paso E&P Company, LP  EP Energy E&P Company, L.P.08/24/2012WY
El Paso E&P Zapata, L.P.El Paso E&P Company, L.P.05/09/2011WY
El Paso Exploration Company Meridian Oil Production, Inc.
    Wyoming List of Serial Numbers
    Wyoming Amended Cover Memorandum
08/26/1985
09/05/1985
01/07/2011
NM
WY
WY
El Paso Exploration &
Production Management LLC 
EP Energy Management, L.L.C. 08/24/2012WY
El Paso Natural Gas Products CompanyEl Paso Products Company06/02/1986 
01/07/2011 
NM
WY
El Paso Oil and Gas CompanyOdessa Natural Corporation12/21/1970
12/28/1970
NM
WY
El Paso Production CompanyMeridian Oil Inc05/20/1996MT
El Paso Production Company

El Paso E&P Company, L.P. 
    (Oil & Gas Leases Only)
El Paso E&P Company, L.P. 
    (Rights of Way Grants Only)

07/24/2006

Pending

WY

WY

El Paso Production Oil & Gas USA, L.P.

El Paso E&P Company, L.P. 
    (Oil & Gas Leases Only)
El Paso E&P Company, L.P.
    (Rights of Way Grants Only)

07/24/2006

Pending

WY

WY

El Paso South Texas E&P Company, L.P.El Paso E&P Company, L.P.

05/09/2011

WY

Elba Gas CompanyWOC Acqstn Company01/23/1995WY
Elk Asset Company, LLCElk Resources, Inc. 
    UT Notice (Oil & Gas leases only) 
    WY Cover Memo. (Oil & Gas leases only)

 
03/13/2008
05/01/2008


UT
WY
Elk Resources, Inc.Elk Resources LLC 
    UT Notice (Oil & Gas leases only) 
    WY Cover Memo. (Oil & Gas leases only)

03/13/2008
05/01/2008

 UT
WY
Ellbogen, John PEstate of John P. Ellbogen
John P Ellogen II, Personal Representative of Estate
05/05/2003WY
Ellbogen, John P., Estate ofEllogen Property Management05/05/2003WY
Elliot IndustriesElliot Industries LP12/17/2001NM
Ellwood Oil CompanySouthwest Royalties Inc
    Amended Decision

11/22/1991
10/02/1991
05/30/2003
06/09/2003

WY
WY
NM
WY

Emerald Oil Company
(Company dissolved)
First Mississippi Corporation
    (Assets Reverted to Parent Corporation)
10/08/1980WY
EM Nominee Partnership CompanyHallwood Energy Partners LP12/27/2002MT
Empire Crude Oil CoGolden Oil Co
    Amended Decision Additional Lease
04/20/1972
11/08/1972
WY
WY
Enduring STBU, LLCTalisman Statoil STBU, LLC04/19/2011
04/21/2011
NM
WY
Energy Reserves GroupBHP Petroleum American Inc12/03/1985WY
Energy Reserves Group, L.L.C.ERG Resources, L.L.C.02/18/2011WY
Enerplus Newco LLCLyco Energy Corporation06/22/2006MT
EnCana Energy Holdings, Inc.EnCana Oil & Gas (USA) Inc  12/01/2010
12/03/2010
MT
WY
EnCana Energy Resources, IncEnCana Energy Holdings, Inc. 03/14/2005MT
EnCana Gathering Services (USA) IncEnCana Oil & Gas (USA) Inc03/15/2005CO
Encore Energy, Inc.Solar Petroleum, Inc.07/08/1987WY
Encso Resources CompanyEnsco Tool and Supply Company06/02/1989WY
Energen Resources MAQ IncEnergen Resources Corp02/28/2001NM
Energetics Inc

 

Energetics Operating Company
    Amended Decision-Additional Lease
    Amended Decision-Additional Lease
    Amended Decision-Additional Lease
    Amended Decision-Additional Lease
    Amended Decision-Additional Lease
    Amended Decision-Additional Lease
    Amended Decision-Additional Lease
    Amended Decision-Additional Lease
05/26/1983
10/24/1983
03/22/1984
05/14/1984
09/27/1984
04/26/1985
06/26/1985
09/05/1985
11/18/1985
WY
WY
WY
WY
WY
WY
WY
WY
WY
Energy Associates IncGeneral Atlantic Ene Corp03/08/1989WY
Energy Development CorpSamedan Oil Corp

05/06/2002
05/23/2002

NM
WY

Energy Minerals CorporationWeeks Energy Minerals Corporation05/04/1984WY
Energy Reserves GroupBHP Petroleum Americas Inc12/03/1985WY
Energy Resource Technology, Inc. Remington Oil and Gas Corporation03/10/2009
03/27/2009
ES
WY
Enjay ChemicalExxon Corp09/03/2004WY
Enron Oil & Gas CoEOG Resources Inc06/22/2000NM
Enron Producing CoEnron Oil & Gas Co02/12/1990WY
Enserch Energy IncEnserch Exploration Inc
    Amended Decision

11/14/1985
06/12/1998

WY
WY

Enserch Expl IncEEX Corp06/05/1998WY
Enserch Expl IncLone Star Ene Plant Oper10/24/1997MT
Enserch Exploration IncEnserch Corporation11/14/1985WY
Ensign Operating CompanyMedicine Bow Operating Company01/27/2004WY
Ensource IncUMC Petro Corp11/01/1991WY
ENSTAR Petroleum Inc

McAlester Fuel Company

    Amended Decision-Additional Lease

04/23/1983
07/25/1984
03/25/1988
MT
WY
WY

ENSTAR Petroleum Inc

ENSTAR Petroleum Company03/25/1988WY
Entech Gas Ventures IncPanCanadian Energy Res Inc01/30/2002WY
EOG (Louisiana) IncEnsign Oper Co07/03/1997WY
EOG (New Mexico) IncEnsign Oper Co07/03/1997WY
EOG (Oklahoma) IncEnsign Oper Co07/03/1997WY
EOG (Texas) IncEnsign Oper Co07/03/1997WY
EOTT Energy Operating Limited PartnershipPlains Marketing LP08/01/2005WY
EP Operating CompanyEP Operating Company, Ltd01/03/1993WY
EP Operating Co LtdEP Oper Ltd Partnership01/31/1995WY
EP Oper Ltd PartnershipNew Enserch Expl Inc04/03/1995MT
EP Production Merger Company, L.L.C. El Paso Production Oil & Gas USA, L.P.08/21/2009WY
Equilion Pipeline Company LLCShell Pipeline Company LLC12/27/2002WY
Equitable ProductionEQT Production Company04/18/2011 
04/21/2011 
ES
WY
Equitable Production-Eastern States Oil & Gas, Inc. Eastern States Oil & Gas, Inc.04/18/2011
04/21/2011
ES
WY
Equitable Production CompanyEQT Production Company04/18/2011
04/21/2011
ES
WY
Equitable Resources Energy COEquitable Production Company01/17/2003MT
Equitable Res Ene Co Balcron Oil DivisionEquitable Energy Co
    (Operator name Only From Letter)
05/10/1996WY
Equity Oil CompanyWhiting Oil & Gas Corporation11/19/2009
12/16/2009
CO
WY
Esso Chemical CoExxon Corp09/03/2004WY
Estate of Daniel Oliver Daniel Oliver Revocable Trust 08/23/2012WY
Estate of Mary McClintock SwiftDocuments returned with letter - no record title interest involved WY
Eurafrep IncGemstar Petroleum Corp05/16/1986WY
Evergreen Operating CorporationPioneer Natural Resources USA, Inc.04/26/2005MT
Evergreen Resources, Inc.Pioneer Evergreen Properties, LLC02/10/2005MT

Evergreen Supply and Distribution Co

Pioneer Natural Resources USA, Inc.

04/26/2005

MT

Evergreen Well Service Company

Pioneer Natural Resources USA, Inc.

04/26/2005

MT

Evmar Oil CorpGruss Petroleum Corp05/22/1986WY
Excel Ene Corp
(Company Dissolution)
Barrett Resources Corp - Assets returned to above listed parent Co07/18/1991WY
Excelsior Oil CorporationMcMoRan Offshore Exploration Co07/17/1985WY
EXCO Production Company, LPEXCO Operating Company, LP03/16/2011
04/01/2011
ES
WY
Exeter Drilling and Exploration CoExeter Company05/02/1975WY
Exeter Drilling CompanyExeter Drilling and Exploration Company08/07/1970WY
Exeter Exploration CoMidcon Exploration Co-Exeter01/08/1987WY
Exploration Company of Delaware, Inc., TheTXCO Resources, Inc.10/21/2010
11/01/2010
MT
WY
Exploration IncPresidio Exploration Inc03/08/1989WY
Exxcel Energy CorporationExcel Energy Corporation02/01/1979
02/14/1979
CO
WY
Exxon CorporationExxonMobil Corporation
    ExxonMobil Corporation (Amended Decision)
09/03/2004
02/10/2006
ES
WY


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