Find a Well Search OptionsShow/Hide STATE: Choose a State Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware District of Columbia Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming COUNTY: Choose a State First WELLS IN COUNTY: Choose a County First OPERATOR: Choose One 1776 Energy Operators 1849 Energy Partners Operating, LLC 2015 Oil, LLC 3-M Energy Corporation 5L Properties, Inc. 8 North LLC 89 Energy 94 Operating, LP ABARTA Oil & Gas Co., Inc. Abraxas Petroleum Corporation Acacia Exploration Partners LLC Acadia Oil, LLC Accumulate Energy Alaska Inc Action Energy, LLC Activa Resources, LLC Addax Operating, LLC. Admiral Permian Resources, LLC Advance Energy Partners Hat Mesa LLC Adventure Operating Company, LLC Aera Energy LLC Aethon Energy Operating LLC AEXCO Petroleum Inc. Agave Oil & Gas, LLC Ageron Energy, LLC. Ajax Resources, LLC Alchemist Energy, LLC allan baugh Allegro Investments, Inc. Alpha Shale Resource, LP Alpine Gas Operator Alta Mesa Services, LP Alta Resources Alta Vista Oil Corporation Altamont Energy ALVARADO 2014 LLC AM Idaho Ameredev LLC Ameredev Operations LLC American Eagle Energy Corporation American Energy - Marcellus, LLC American Energy - Utica, LLC American Energy - Woodford, LLC American Energy Permian Basin American Energy Utica American Petroleum Partners Operating, LL Americo Energy Resources, LLC Amistad Energy Services, LLC Ampak Oil Company Amplify Energy Corp AMTEX ENERGY, INC Anadarko Petroleum Corporation Anderson Oil Ltd Anschutz Exploration Corporation Anschutz Oil Company, LLC Antelope Energy Company, LLC Antero Resources Corporation Anthis Land Company LLC Antioch Operating, LLC Antle Operating, Inc. AOG OPERATING, LLC AOGP, LLC Apache Corporation Apex Energy LLC Apollo Operating, LLC Appalachian Energy, Inc. Appaloosa Operating Company LLC Approach Resources Arabella Petroleum Arapahoe SPV LLC Arcadia Operating, LLC Ardmore Production & Exploration Co. Ares Energy Ltd Ark-La-Tex Energy, LLC Arkland Producing Co., Inc. Arlington Petroleum LLC Armor Energy, LLC Arnold Oil Properties, LLC Arrington Oil & Gas Operating LLC Arris Petroleum Corporation Arrow Oil & Gas, LLC. Arrow Rock Energy, LLC Arrowhead Energy Inc. Arsenal Energy USA Inc. Arsenal Resources Aruba Petroleum, Inc. Ascent Resources - Marcellus, LLC Ascent Resources - Utica, LLC Aschere Energy Atalaya Resources, LLC Aterra Exploration, LLC Athlon Energy Operating LLC Atlantic Exploration Atlantic Operating, Inc. Atlantic Resources Company LLC Atlas Energy, L.P. Atlas Resource Partners, LP Atoka Operating Permian, LLC Atoka Operating, Inc. Atropos Exploration Company ATX Energy Partners, LLC Augustus Energy Partners II, LLC Augustus Energy Partners, LLC Augustus Energy Resources LLC Aurora Operarting, LLC Aurora Power Resources, Inc. Aurora USA Developement, LLC Aus-Tex Exploration, ltd. AusCo Petroleum, Inc Australis TMS Inc. Auterra Resources AVAD Operating, LLC Avalon Exploration, Inc. Avalon Operating, LLC Avant Operating, LLC Axia Energy II, LLC Axia Energy, LLC Aztec Drilling & Operating, LLC B&L Exploration, L.L.C. B&W Operating, LLC B. R. Polk, Inc. Badlands Energy - Utah, LLC Bainbridge Uinta, LLC Ballard Exploration Company, Inc. BAM Permian Operating, LLC Banner Oil & Gas, LLC Banner Resources LLC Barber Oil, LLC Baron Exploration Company BASA Resources, Inc. Basis Resources Group, LLC Bays Exploration, Inc. Bayswater Exploration & Production, LLC Baytex Energy USA Ltd BBL OPERATING COMPANY, LLC BBX Operating BC Operating, Inc. Beacon E&P Company, LLC Bean Resources.com Bedrock Production, LLC Beech Resources LLC Bend Petroleum Corp Bennett Resources, Inc. Berry Petroleum Berry Petroleum Company, LLC Best Petroleum Explorations, Inc. Betro, Inc. BHP Billiton Petroleum Big Star Oil & Gas, LLC Bill Barrett Corp Billy Jack Sharber Operating, LLC Birch Operations, Inc. Bison Exploration, LLC Bison Oil & Gas II, LLC BKM Production BKV Barnett, LLC BKV Corporation BKV Operating LLC Black Creek Oil Company, LLC Black Crown Energy, LLC Black Diamond Minerals LLC Black Hills Exploration and Production Black Mesa Energy Black Mountain Oil & Gas II, LLC Black Mountain STX I LLC Black Raven Energy, Inc. Black Swan Oil & Gas Black Warrior Methane Corp. Blackbeard Operating BlackBrush O & G, Inc. BlackBrush O & G, LLC Blackhill Energy LLC BlackRidge Resource Partners Blackstone Seminole LLC BlackWell Exp & Development, LLC Blake Production Company, Inc. Blakenergy Operating, LLC BLS Production Co., Inc. BLUE CHIP OIL INC Blue Devil Exploration LLC Blue Dolphin Production, LLC Blue Dome Operating, LLC Blue Ox Partners LLC Blue Quail , LTD Blue Water Resources, LLC Blue Water TPX Operating Co., LLC BlueCrest Alaska Operating LLC Bluefin Resources LLC Bluescape Resources BlueStem Energy Bluestem Energy Holdings, LLC BlueStone Natural Resources BLX, Inc. BMR II BNK Petroleum (US) Inc BNK Petroleum (US) Inc. Boaz Energy II Operating, LLC Boaz Energy, LLC. Bold Operating, LLC Bonanza Creek Energy, Inc. BOPCO, LP Borderline Operating Corp Bowles Energy, Inc. Bowline Energy LLC BP America Production Company BPX Operating Company BPX Operating Company (BP America Production Co.) Brahman Resource Partners LLC Brahman Resource Partners, LLC Braka Operating, LLC Brammer Engineering, Inc. Bratco Operating Company Bravo Arkoma LLC Brazos River Exploration LLC Breck Operating Corp. BreitBurn BreitBurn Operating LP Breitling Operating Corporation BRG Lone Star LTD BRG Petroleum LLC Bridon Energy LLC Bridwell Oil Company Brigadier Operating LLC Brigham Operating, LLC Brigham Resources Operating, LLC Bright Horizon Resources Bright Rock Energy LLC BRIX OPERATING LLC Broad Oak Energy II LLC Brooks Range Petroleum Corporation BROOKSTON ENERGY ETX-NLA Brown & Borelli, Inc. Brown Oil & Gas BROWN, GEORGE R PARTNERSHIP, LP, THE Browning Oil Company, Inc. Bruin E&P Operating, LLC Bryan Henderson Co BTA Oil Producers LLC Buckeye Oil Producing Company Buffco Production,Inc Bulldog Operating Company Bullet Development, LLC Burk Royalty Co., LTD. Burk-Gunn Oil Company Burleson Petroleum, Inc. Burnett Oil Co., Inc. Butkin Oil Company, LLC Butler Petroleum, LLC BVX OPerating Inc. C & C Productions, LLC C. E. Harmon Oil, Inc. C6 Operating, LLC Cabot Oil & Gas Corp Caelus Energy Caerus Oil and Gas LLC Caird Operating, LLC California Resources Corporation Callon Petroleum Operating Company Calyx Energy III, LLC Calyx Energy, LLC Cambrian Management, Ltd Camino Natural Resources, LLC Campbell Oil & Gas. Inc Canan Mowrey Operating, LLC Canan Operating, Inc. Cantera Operating LLC Canyon Creek Energy Operating, LLC Canyon Operating, LLC CAP Energy Capitan Energy INC Capstone Natural Resources II, LLC Capstone Natural Resources, LLC Captiva Energy Partners LLC Caraway Operating Company Cardinal Oil, LLC Caribou Operating, Inc. Carl E. Gungoll Exploration LLC Carmony Exploration, LLC Carrera Energy, LLC Carrizo Oil & Gas, Inc. Cartledge Oil Company Casa Grande Exploration Company Cascade Petroleum Casillas Operating, LLC Castleton Commodities International Catamount Energy Partners Catena Resources Operating, LLC Cazador Operating, LLC Cazar Energy, Inc. CBL Resources, LLC CBM Gas Company LLC CBP Operating LLC CCI East Texas Upstream LLC CCRP Operating, Inc. Centennial Resource Production, LLC Central Resources, Inc. Centrex Operating Co Century Exploration Houston, LLC CEP MID-CONTINENT LLC CGS Operating CH4 Energy II, LLC CH4-Finley Operating LLC Chaco Energy Co. Champion Lone Star Operating Chaparral Energy, LLC Charger Oil & Gas LLC Charles P Dunning LLC Charter Oak Production Co., LLC Cher Oil Company, Ltd. Chesapeake Operating, Inc. Chevron USA Inc. Cheyenne Petroleum Company Chief Oil & Gas CHISHOLM ENERGY OPERATING, LLC chisholm Oil and Gas Operating, LLC Choate Disposal Services LLC Choice Exploration, Inc. Cholla Petroleum, Inc. Churchill Operating, LLC chuza oil company CIE Cimarex Energy Co. Cimarex Energy Co. of Colorado Cimarron Engineering LLC Cimarron Engineering, LLC Cinco Natural Resources Corporation Cinco Oil & Gas, LLC Cinnabar Energy, LTD. Circle 9 Resources LLC Cirque Resources LP Cirrus Production Company Cisco Operating, LLC Citation Oil and Gas Corp. Citizen Energy II Citrus Energy Corporation Clayton Williams Energy, Inc. Clean Energy Exploration and Production Clear Fork, Inc. Clear Water, Inc. CML Exploration, LLC CMX Inc of Kansas CNX Gas Company LLC Coachman Energy / Cynosure Energy COBRA OIL & GAS CORPORATION COG Operating LLC Colgate Operating, LLC Comanche Exploration Co., LLC Comanche Resources Company Command Compass Energy Operating, LLC Comstock Oil & Gas Condor Energy Technology LLC Confluence DJ LLC ConocoPhillips Company/Burlington Resources CONSOL Energy Inc. Contango Resources, Inc. Continental Exploration LLC Continental Resources, Inc Cook Inlet Energy Cooper Oil & Gas, LLC Copestone Operating LLC Corda Corporation Corinthian Exploration (USA) Corp. Corlena Oil Company Cornerstone Natural Resources Cornerstone Natural Resources LLC Cornerstone Petroleum Operating, LLC Corterra Energy Operating, LLC Costa Energy, LLC COTERRA ENERGY INC. Council Oak Resources Courson Oil & Gas, Inc. Covenant Operating, LLC Covey Park Gas Covey Park Operating, LLC Covey Park Resources, LLC Covington Oil Co., Inc. CP Exploration CPRP Services, LLC CR3 Operating Company LLC Craig Elder Oil and Gas, L.L.C. Craton Alpha LLC Crawley Petroleum CRD Operating, LLC Crescent Pass Energy, LLC Crescent Point Energy US Corp Crest Resources, Inc. Crestone Peak Resources Crimson Energy Partners III, LLC CRIMSON ENERGY PARTNERS IV, LLC Crimson Exploration Oper. Inc. Crimson Resource Management Criswell Energy, LLC Crockett Operating, LLC Crose Oil Company Cross Creek Energy LLC Cross Timbers Energy, LLC Crow Creek Operating Co. III, LLC CROWHEART ENERGY, LLC Crown Energy Company Crown Equipment Co. CrownQuest Operating, LLC Cub Creek Energy, LLC Cummings Oil Company Curl Creek Enterprises Custer & Wright Operating, Inc Cutbow Operating LLC CW Resources, Inc. Cypress Operating, Inc. D&B Operating LLC D&J Oil Co., Inc D.J.F. Services, Inc. Dakota Resources, Inc. Dallas Petroleum Group, LLC Dallas Production, Inc Dan A. Hughes Company, L.P. Danick Operating USA Danmark Energy LP Dash Operating, LLC Dave holke Consulting, Inc. Davidson Energy, Inc. Daylight Petroleum LLC DE Operating LLC DE3 Operating LLC Dejour Energy (USA) Corp. Delta CO2, LLC Delta Oil & Gas Ltd. Demco Oil and Gas Company Denali Oil & Gas Management Denbury Onshore, LLC Derby Exploration Devon Energy Production Company L. P. Dewbre Petroleum Corporation Dexxon, Inc. DGP Energy DGP Energy, LLC Diamond Production Co., LLC Diamondback E&P LLC Diamondback Resources,LLC Dick Lindsay Oil Co Dick Lindsay Oil Co., Inc. Dinero Operating Dirnett, Inc. Discovery Natural Resources LLC Discovery Oil and Gas, LLC Discovery Operating, Inc. Diversified Production LLC DJR OPERATING, LLC Dominion Natural Resources, LLC donray petroleum llc. Dorado E&P Partners, LLC Dore Energy Co., Ltd. Double Eagle Operating Douglas Q. Jones, LLC Dove Oil Corporation Draco Energy, Inc. Dragon Oil & Gas LLC Driftwood Energy Operating, LLC DTE Gas Resources, LLC Dugan Production Corp. Duke Gas Company, LLC Duncan Oil Properties Dunn Exploration, LLC Dunn's Oil and Gas Lease Managements, LLC Dyad Petroleum Company E. N. Patton Oil Company, Inc. E.G.L. Resources, Inc. E2 OPERATING LLC Eagle Energy Acquisitions LP Eagle Exploration Production, LLC Eagle Hydrocarbons Inc. Eagle Oil & Gas co. Eagle Road Oil LLC EAGLE ROCK MID-CONTINENT OPERATING, LLC EAGLE ROCK OPERATING COMPANY, LLC EagleRidge Energy, LLC EAP Ohio LLC Earlsboro Energies Corp. Earthstone Operating, LLC East Cheyenne Gas Storage, LLC EastCo Operating, LLC Eastok Energy Partners LLC Echo E&P LLC Echo Production, Inc. Eclipse Resources I, LP EDF Trading Resources, LLC Edge Barnett Operating Company LLC Edge Energy II LLC Edge Energy, LLC EdgeMarc Energy Holdings, LLC EE3 LLC EEC, Inc. EF Energy, LLC El Paso E&P Company El Toro Resources LLC Element Petro Operating II, LLC Element Petroleum OP III,LLC Element Petroleum Operating, LLC Eleon Operators, LLC. Elephant Oil & Gas Elephant Oil and Gas Elevation Resources, LLC Elk Meadows Resources, LLC Elk Petroleum Elk River Resouces, LLC. Elk River Resources Ellis Exploration, Inc. Elm Ridge Exploration Co LLC Emerald Oil Inc Emerald Oil LLC Empresa Energy LLC Empresa Operating, LLC Encana Oil & Gas (USA) Inc. Encino Operating LLC EnCore Permian Operating, LLC Endeavor Energy Resources Endeavor Natural Gas, LP Endeavour Operating Corp Endeavour Operating Corporation Endurance Resources LLC Enduring Resources LLC Enduro Operating II LLC Enduro Operating LLC Energen Resources Corporation Energy & Exploration Partners Operating, LP Energy Corporation of America Energy Hunter Resources, Inc. Energy Management Co. EnergyQuest II, LLC Enerplus Resources (USA) Corporation EnerQuest Operating L.L.C. EnerVest, Ltd. Enexco, Inc. Ensign Operating LLC Entek GRB LLC ENTERPRISE ENERGY EXPLORATION INC. EOG Resources, Inc. EP Energy EQT Production Equinor Energy LP Equinor Texas Onshore Properties LLC Equinor USA Onshore Properties Inc. ER Operating Company Ergon Exploration Escondido Resources II, LLC Escondido Resources Oper Co Estancia Oil & Gas, LLC Estate Oil & Gas LLC Evergreen Natural Resources LLC Evertson Operating Company EW Energy Operator, LLC Excalibur Reserouces EXCO Resources, Inc. EXCO/HGI JV Assets, LLC ExL Petroleum, LP ExTech Operating, LLC Extex Operating Company EXTRACTION OIL & GAS LLC F. Howard Walsh, Jr. Operating Co., Inc. Fair Oil, Ltd. Fairway Resources Op. LLC Fairway Resources Operating III, LLC Fairways Exploration & Production, LLC Falcon Energy Partners, LLC Far West Development, LLC Farmer Operating, LLC Faro Oil & Gas Fasken Oil and Ranch, Ltd. Faulconer Energy FDL Operating, LLC Felderhoff Production Co FELIX ENERGY HOLDINGS II, LLC FELIX ENERGY LLC Felty Drilling Co., Inc. FHA Operating Fidelity Exploration & Production Fidgets Energy, LLC Fifth Creek Energy Operating Company LLC Figure 3 Operating LLC FIML Natural Resources, LLC Finley Resources, Inc. Finney Oil Company Firebird Energy FireWheel Operating, LLC First Ascent Operating, LLC Firstrike Energy Corporation Five States Energy Fivestones Energy LLC FLAMINGO OPERATING, LLC Flat Creek Resources LLC Fletcher Operating, LLC Fletcher Petroleum Corp. Flint Interest, LLC Fontainebleau Operating, LLC Foree Oil Company Foreland Operating, LLC Forest Oil Corporation Forestar Forge Energy, LLC Fortay, Inc. Fortuna Resources Development, LLC Forty Acres Energy LLC Fossil Creek Energy Corporation Fossil Petroleum, LLC Fossil Resources, Inc. Foundation Energy Management, LLC Founders Oil & Gas Operating, LLC Four C Oil and Gas Corporation FOUR CORNERS PETROLEUM Four Corners Petroleum II, LLC FourPoint Energy Fouts Oil & Gas, LLC Fox Northeastern Oil & Gas Corporation Franklin Mountain Energy Franks Exploration Company, LLC Freedom Production, Inc. Freeport-McMoRan Oil & Gas Fritzler Resources, Inc. Fuego Energy, LLC Fulcrum Exploration, LLC. Fuller Production, Inc. Furie Operating Alaska Fuse Energy, LLC Future Acquisition Company, LLC G.A. Hawkins G3 Operating, LLC. Gaedeke Oil & Gas Operating, LLC Galt Investment Company, LLC Garry Davis Oil, LLC Gary Permian, LLC Gasco Energy, Inc. Gastar Exploration Inc. Gateway Resources USA Inc GeoSouthern Energy Corporation GeoSouthern Operating II, LLC GeoSurveys, Inc. GEP HAYNESVILLE II, LLC GEP HAYNESVILLE, LLC Geurin Oil & Gas GHA Barnett, LLC Gilliland Oil & Gas, Inc. Ginnings Company GLB Exploration, Inc. GLEN D. GONZENBACH, LLC GLIMP OIL COMPANY, LLC GLM Energy, Inc. GMT EXPLORATION GMX Resources Goodrich Petroleum Company, LLC Gordon Creek, LLC. Gordy Oil Company Gosney & Sons, Inc. Goza Lucerne Prospect, LLC Grand Mesa Operating Company Grand Operating, Inc. Grant Canyon Oil and Gas Grayson Mill Operating, LLC Great Bear Pantheon LLC Great Bear Petroleum Operating LLC Great Plains Operating, LLC Great Western Oil & Gas Company, LLC Green Century Exploration & Production, LLC Greg Hall Oil and Gas Grenadier Energy Partners II Greylock Production LLC Greystone Oil & Gas LLP Greystone Petroleum Griffin Petroleum Company Griggs and Bales Grit Oil and Gas Management, LLC Grynberg Petroleum Guidon Energy Management Services LLC Guinn Investments, Inc Gulf Bend Resources, LLC GULF EXPLORATION, L.L.C. Gulf Pine Energy Gulfport Energy Corporation GulfTex Energy III, LP GulfTex Energy, LLC Gunn Oil Company Gunnison Energy Corporation Gunnison Energy LLC Gus Jones Cable Tool Service LLC H&L Exploration Company, LLC Hadaway Consulting and Engineering, LLC Halcón Operating Co., Inc. Halcon Resources Corporation Hall & Ross Resources Halvey Energy, LLC HAMMAN OIL AND REFINING COMPANY Hannathon Petroleum, LLC Harmonia Petroleum Corporation Hat Creek Resources, LLC Hawkwood Energy Operating, LLC Hazelwood Production & Exploration Company, LLC HB2 Eneregy Headington Energy Partners, LLC Headington Oil Company Hebron Energy, LLC Heights Energy Corporation Helis Oil & Gas Company, L.L.C. Henry Resources LLC Herd Producing Company, Inc. Hess Corporation Hewitt Operating Inc. HEXP Operating, LLC Hibernia Resources III Hibernia Resources, LLC Highlands Natural Resources HighMark Energy Operating LLC HighMount Exploration & Production HighPeak Energy Holdings, LLC. HighPoint Operating Corporation Hilcorp Alaska, LLC Hilcorp Energy Company Hill-Lake Gas Storage, LLC HILLCREST PETROLEUM, LLC Hinkle Oil & Gas, Inc. HMD OIL CO, INC Hogback Exploration, Inc Hollimon Oil Corporation Holmes Exploration, LLC Hopewell Operating, Inc. HORST ENERGY LLC Houston Petroleum Company HPC ENERGY LLC HRC Operating, LLC. Hulen Operating Company Hunt Marcellus Operating Company Hunt Oil Company Huntington Energy, L.L.C. Huntley & Huntley Energy Exploration Hurd Enterprises Husky Ventures, Inc. HW Operating, LLC HWH DRILLING LLC I-Mac Petroleum Service Inc. IACX Production ICA Energy Operating, LLC Imperial Gas Resources, LLC ImPetro Operating LLC Incline Energy Independence Resources Management, LLC. Indian Oil Co., Inc. Indigo II Louisiana Operating, LLC Indigo Minerals Inflection Energy (PA) LLC INLAND OCEAN, INC. Inland Operating Company INPEX Eagle Ford, LLC INR Operating, LLC International Energy Corporation International Energy Corporation of Northern Oklahoma Interstate Explorations LLC Iochem Corporation Iron Star Energy, LLC Ironwood Oil and Gas, LLC ITEXCO TEXAS, LLC J & J PRODUCTION COMPANY J & T Operating LLC J CLEO THOMPSON J L Watkins J&J Production Co., LLC J-Brex Company J-D-O Oil Co. J-Lyn Oil CO. J-W Operating Company J.I. Staley Co., LLC Jabsco Oil Operating, LLC Jagged Peak Energy JAMEX, Inc. Jay-Bee Oil & Gas, Inc. JB Production LLC JDL Operating, LLC JEC Operating, LLC Jerry Hess Operating Company Jetta Operating Company, Inc Jetta Operating Compnay, Inc Jilpetco, Inc. Jimmy Chatham Oil & Gas JKLM ENERGY JL E&P, LLC JM COX RESOURCES, L.P. JMA ENERGY COMPANY JMH Production, LLC Johanson Oil John M. Clark, Inc. Johnson & Ernst Operating Co. Jolen Operating Company Jonah Energy LLC Jones Energy llc Jones Energy Ltd Juneau Energy, LLC Juniper Resources Exploration Company, LLC Juno Operating Company II, LLC Juno Operating Company III, LLC JVA Operating Company, Inc. K S OIL COMPANY, INC K.P. Kauffman Company K.S. Oil Company K3 Oil & Gas Operating Company KA Energy Op Co., LLC Kaiser-Francis Oil Company Kaler Energy Corp. Katsco Energy, Inc. Keating Energy Keen Resources LLC Keith F. Walker Oil & Gas Co., LLC Kelly Cook Oil LLC Keystone Petroleum NM LLC KGH Operating Company Killam Oil Co., Ltd. Kinder Morgan Kinder Morgan Tejas Pipeline, LLC king energy llc King Operating Corp. Kirkpatrick Oil Company Kirkpatrick Oil Company, Inc KJ Energy, LLC Koch Exploration Company, LLC Koda Operating KODA Resources Operating, LLC Kodiak Oil & Gas Corp Kodiak Oil & Gas, Inc. Kovar Operating, LLC Kraken Operating LLC KRC Operating, LLC KWR Ventures L & M Operating, Inc. L.E. Jones Operating, Inc. La Vernia Oil Lacrosse Exploration LLC LADD OIL & GAS CORPORATION Laddex, Ltd Lainco, Inc. Lake Crystal Operating LLC Lakeshore Operating, LLC Lakota Energy, LTD. Lance Ruffel Oil and Gas Land and Natural Resource Development, Inc Lane Operating Company Lapetco Inc Laramie Energy II, LLC Laramie Energy, LLC Laredo Energy Laredo Energy Operating, LLC Laredo Petroleum, Inc. Lario Oil & Gas Company Latigo Oil & Gas, Inc. Latigo Petroleum, LLC Lavaca Canyon Petroleum Lawrence County Gas, LLC Layline Petroleum LCS Production Company LeClair Operating Co., Inc. lee cox investments Legacy Exploration, LLC I Legacy Oil & Gas ND, Inc. Legacy Reserves Operating LP Legado Permian, LLC Legend Natural Gas, LLC LeNorman Operating LLC Lera Levant Energy LLc Lewis Energy Group Lewis Oil Operations, LLC Lewis Operating Co. Liberty Operating, Inc. Liberty Resources LLC Liberty Resources Management Company, LLC Lighthouse Oil & Gas LP Lightning Oil Company Lime Rock Resources, LP Limestone Exploration II, LLC LINCOLN VENTURES, LLC Linn Energy, LLC LITTLE RIVER ENERGY CO Llewellin Operating Company, LLC LOGOS Operating, LLC LOKI Oil LLC LOLA Energy PetroCo Lone Star Land & Energy II Lonestar Resources, Inc. Longfellow Energy, LP Longs Peak Energy Longs Peak Resources, LLC LP Operating, LLC Lu-Ray Petroleum, LLC LUCA RESOURCES GROUP, LLC Luxe Operating, LLC LYNX OKLAHOMA OPERATING LLC M. E. Operating and Services, Inc. Mach Resources Macha Enterprises Inc Machin & Assoc., Inc. Mack Energy Co. Mack Energy Corporation MACKELLAR INC Mackey Consulting & Leasing LLC Magnet Oil LP Magnolia Oil & Gas LLC Magnum Energy, Inc. Magnum Hunter Resources Corp Magnum Producing, LP Magpie Operating, Inc MAK-J Energy Colorado, LLC. Makoil Inc Mallard Exploration Malone-Marsh Well Mammoth Exploration, LLC Manti Exploration Operating LLC Manti Tarka Permian MANZANO, LLC Marathon Oil Marjo Operating Mid-Continent, LLC Marlin Energy Resources, LLC Marlin Energy Southwest GP, L.L.C. Marshall & Winston, Inc. Martin Production Company Matador Production Company Matrix Oil Corporation Matrix Petroleum LLC Maverick Brothers Resources,LLC Maverick Operating, LLC Maxim Energy Corporation Maximus Operating, LTD. McClure Oil Co. McCommons Oil Company McCoy Petroleum Corporation McElvain Energy, Inc. MCG Oil & Gas Operating, LLC McOil Operating Company MD America Energy LLC MDC TEXAS ENERGY MDS Energy Development LLC MDS Energy, Ltd Meade Energy Corp. Meason Petroleum LLC MECO IV, LLC Medders Oil Company, Inc. Mego Resources, LLC Memorial Production Oper. :LLC Memorial Resource Development LLC MENDELL FINISTERRE II LLC Mercury Operating, LLC Merit Energy Company Merit Energy Company LLC Meritage Energy Company, LLC Mertz Energy LLC Mesa Energy Partners, LLC Mesquite SWD Mestena Operating, L.L.C. Metano Energy III, LP MEWBOURNE OIL COMPANY Mid-Con Energy Operating, LLC Mid-States Operating Company Middle Fork Energy Parterns, LLC Midenergy Operating, LLC Midland Energy Inc. Midland Oil And Gas, Inc. Midstates Petroleum Company Midville Energy Milagro Exploration, LLC Millennial Energy Partners Mineral Resources, Inc Missouri River Resources MLC Operating, LP MM Energy, Inc. Modern Exploration, Inc. Mohican Operating Molopo Energy Texas, LLC Momentum Operating Co., Inc. Monarch Energy Co., LLC Mongoose Energy, LLC Moon-Hines-Tigrett Operating Co., Inc. Moore Petroleum Investment Corp. Moriah Operating, LLC Morning Gun Exploration LLC Mortimer Production Company Mosbacher Energy Company Mountain Creek Energy, Inc. Mountain Divide LLC Mountaineer Keystone, LLC MPB Oil & Gas Mr. MRD OPERATING LLC Mt. Dora Energy Mueller Exploration, Inc. Muirfield Exploration, Ltd. Murchison Oil & Gas Inc Murchison Oil and Gas, LLC Murex Petroleum Corp. Murphy Exploration and Production USA Musgrove Energy Inc. Muskegon Development Company Mustang Creek Energy LLC Mustang Fuel Corporation MWS Producing, Inc. N S P Operating Group LLC Nadel and Gussman Nadel and Gussman Permian, LLC Naifco Oil & Gas, LLC National Fuel Corporation Native Exploration Operating LLC Navidad Operating Company, LLC Navidad Resources LLC NBL Permian LLC Neches Exploration, L.L.C. Nemo Fund I, LLC NEOK Production Co., LLC New Century Exploration, Inc. New Century Operating, LLC New Dominion LLC New Gulf Resources, LLC Newark E&P Operating, LLC Newfield Exploration Newkumet Exploration, Inc. Newpek, LLC - ( Alfa Group ) NFR Energy LLC NGO Development Corporation Nickel Road Operating LLC Nighthawk Production LLC Nine Point Energy, LLC NMR Energy LLC Noble Energy, Inc. Noble Resources, Inc. North Plains Energy, LLC North Silo Resources, LLC Northeast Natural Energy LLC Northfield Enterprises, Inc. Northstar Gas Company, Inc. NorthStar Operating Company Novo Oil & Gas Texas, LLC NP Resources O'Benco, Inc. O'Brien Oil Corporation Oak Energy, LLC OAK Valley Operating, LLC Oak Valley SWD LLC Oakridge Oil and Gas, LP Oasis Petroleum Occidental Oil and Gas OEX-1, LLC Ogden Resources Corporation OGP OPERATING, INC. OGX Operating LLC Ohio Valley Energy Systems Corp. Oil Producers, Inc. of Kansas Oil Projects, LLC Oil Search Alaska, LLC Okland Oil Company Olympus Energy Omimex Petroleum Inc. Omni Oil & Gas, Inc. OneEnergy Partners Operating, LLC Opal Resources Operating Company Opus Operating II LLC Opus Operating, LLC Orca Operating Company, LLC Osage Exploration and Development Osage Exploration and Develpoment, Inc. OSBORN HEIRS COMPANY Overland Resources LLC Ovintiv Mid-Continent Inc. Ovintiv Production, Inc. Ovintiv USA Inc. P.O.&G. Operating, LLC Pablo Energy II, LLC PACE OPERATING Pacesetter Energy, LLC Pacific Energy & Mining Company PAK Energy LLC Paladin Petroleum III LLC Palm Oil & Gas Company Palmer Petroleum, Inc. Paloma Natural Gas, LLC Paloma Operating Co, Inc Paloma Resources, LLC Pantera Energy Company Panther Energy Co. II, LLC PAR MINERALS CORP Paradox Upstream, LLC Parallel Petroleum LLC Parsley Energy Operations, LLC Partee Drilling Inc Parten Operating, Inc. Patara Oil & Gas, LLC Patriot Resources, Inc. Patterson Energy Corporation Paul Burton, LLC Paul Gillham Oil Company Pay Dirt Energy, LLC Payne Exploration Company PayRock Energy, LLC PayRock II, LLC PCORE Exploration & Production LLC PDC Energy Peachridge Energy Operating, LLC. Peak Operating LLC Peak Permian, LLC Peak Powder River Resources, LLC Peak Texas Resources, LLC Pearl Oil & Gas Pearl Resources Operating Co., LLC Pecos Operating Company, LLC Pedernales Production, LP Pedestal Oil Company, Inc. Pendragon Oil Co. Penn Virginia Corporation Penn Virginia Oil & Gas Corporation PennEnergy Resources, LLC Pennington Oil & Gas Interests, LLC Pennington Operating Company, LLC Pennsylvania General Energy Percussion Petroleum LLC Peregrine Petroleum Partners, LTD Performance Operating Company Periscope Operating LLC Perkins Energy Company Permian Deep Rock Oil Co., LLC Permian Resources Peterson Energy Operating, Inc. PETEX Petro Harvester Operating Company LLC Petro Harvester Operating Company, LLC Petro Hunt, L.L.C. Petro Operating Company, LLC Petro Warrior, LLC Petro-Guard Production LLC Petrobal Omega 1, LLC Petrodome Operating, LLC PetroEdge Energy III LLC PetroEdge Energy IV, LLC Petroglyph Operating Company, Inc. Petrogulf Corportation PetroLegacy Energy II, LLC Petron Energy II, Inc. Petroplex Energy Inc. PetroPoint Energy Operating, LLC. PetroQuest Energy LLC PetroShale (US), Inc. PetroShare Corp Petrox Resources Inc. PHOENIX OIL & GAS, INC. Phoenix PetroCorp, Inc. Piceance Energy, LLC PICO Niobrara LLC Piedra Operating, LLC Pillar EFS, LLC Pine Wave Energy Partners PINEDALE ENERGY PARTNERS OPERATING LLC Pinon Operating LLC Pioneer Natural Resources Pitts Energy Co Plains Exploration & Production Company Platinum Energy Solutions Plymouth Exploration, LLC PMO Poblano Energy LLC POCO Operating Point Energy Partners Operating, LLC Polaris Operating, LLC Pollok Energy POP Operating Company PostRock Energy Corp. Postrock Midcontinent Production LLC PPC Operating Company LLC Prairie Gas Company of Oklahoma Prairie Resources LLC Pregler Oil Company, LLC Premier Natural Resources II, LLC Premier Oil & Gas Incorporated Prentice Oil Company LLC Presley Operating LLC PRI Operating, LLC Price Operating, LLC Pride Energy Company Primary Natural Resources III Prime Operating Company Prime Rock Resources Primera Energy Primexx Operating Primexx Operating Corporation Prize Exploration & Production, LLC Production Resources, Inc. Propel Energy, LLC Prospect Protege Energy III LLC Pruet Production Co. Pruitt Operating Co. LLC PT Petroleum, LLC. Pursuit Oil & Gas STX, LLC Pursuit Oil & Gas, LLC Q P, Inc. QEP Energy Company Qstar Operating LLC Quail Oil & Gas, LC Quanah Panhandle, LLC Quantum Resources Management, LLC Quartz Mountain Oil & Gas LLC Quicksilver Resources Inc. R E Blaik Inc R. Baker Oil, LLC R. Lacy Services, LTD R2Q Operating LLC Rafter H Operating Rainbow Seven Oil and Gas Ram Fayette, LLC Ramtex Energy LLC Ranchers Exploration Partners, LLC Ranchers Resources Inc. Range Louisiana Operating, LLC Range Resources Corporation Ranger O&G RANKEN ENERGY CORPORATION RAVEN FOREST OPERATING, LLC Raw Oil & Gas, Inc. Ray Herring Operating Co., LLC Ray Richey Managment Company, Inc. Reach Oil and Gas Company Read & Stevens, Inc. Rebellion Energy Recoil Resources Operating Inc. Red Bluff Resources Red Fork (USA) Investments, Inc. red fork production, llc Red Hawk Petroleum, LLC Red Mountain Operating LLC RED OAK OIL COMPANY, LLC Red Rocks Oil & Gas Operating LLC Red Willow Production Company Red Willow Production, LLC Red Wolf Operating Redbud E&P, Inc. Redemption Oil & Gas, LLC Redland Resources, Inc. Redwood Operating LLC Reeder Energy Regeneration Energy Corp. Reid Williams Operating, Inc. REJAS Energy, LLC Relentless Permian Operating LLC Reliance Energy, Inc Remora Operating LLC Renegade Oil & Gas Company, LLC Renos Land and Minerals Company REOC, LLC Repsol O&G, LLC. RESACA RESOURCES, LLC Resolute Natural Resources Resource Energy Resource Oil and Gas, LLC Return Disposal LLC Reveille Oil & Gas Operating, LLC Revelation Gas & Oil Oklahoma Reverence Operating LLC Revolution Resources Rex Energy Reynolds E & P, Inc RFE Operating, LLC RG Exploration LLC RG Exploration LLC\RGX RHDK Oil & Gas, LLC Rice Drilling B, LLC Richland Resources Corporation Ricochet Energy, Inc. Rife Energy Operating Riley Exploration, LLC Riley Permian Operating Company, LLC RIM Operating, Inc RimRock Oil and Gas Willison, LLC Rimrock Resource Operating, LLC Ring Energy, Inc. Rio Grande E&P, LLC Rio Oil and Gas, LLC Rio Petroleum, Inc. Rising Star Energy Partners, L.L.C. River Rock Operating Riverside Midstream Water Resources, LLC Riviera Operating, LLC RK Petroleum Corp. RKI Energy Resources, LLC RKI Exploration & Production RKR Exploration Inc RLU Operating, LLC RMB Operating LLC RMD Roan Resources LLC Roberson Oil Company, Inc. Robert L. Bayless, Producer LLC Rock Creek Resources, LLC Rock Oil Company Rockcliff Energy Operating Rockdale Marcellus, LLC Rockefeller Hughes (USA) LLC Rockies Resources Holdings LLC Rocky Creek Resources, LLC Rocky Top Energy Roff Operating Company Rosehill Operating Company, LLC Rosetta Resources Rosewood Resources Roundtree & Associates, Inc. Rover Operating Company, LLC Rover Petroleum Operating, LLC ROX Exploration, Inc. Royalty Land & Dev. Co., Inc. RP Operating, LLC RSP Permian, LLC RTA Petroleum LLC rtb oil,inc. Ruckus Energy Operating, LLC Running Horse Production Company S. B. STREET OPERATING, INC. Sabalo Exploration Operating,LLC Sabalo Operating, LLC Sabinal Energy Sabine Oil & Gas Corporation Sabine Oil & Gas LLC Sable Permian Resources Sabre Oil Company, LLC Saddle Operating, LLC Saddleback Exploration Saga Petroleum LLC Sage Natural Resources Sahara Operating Company Samson Samson Exploration, LLC Samson Oil and Gas Montana, Inc. San Angelo Operating Corp. Sanchez Oil & Gas Corporation Sandalwood Exploration, LP Sandman Exploration, LLC Sandpoint Operating, LLC SandRidge Energy Sanguine Gas Exploration Sauder Management Company Savant Alaska LLC Scala Energy Operating LLC Schlachter Operating Corp. Schneider Energy Services Scout Energy Partners SDX Resources, Inc. Seaboard Operating Co. SEC Production Seguro Oil and Gas LLC Seidler Oil & Gas Operating, LLC Sellers Lease Service, Inc Selous Energy, LLC SEM Operating Company, LLC Seneca Resources Corporation SEP - OK 1 LLC Sequel Energy, LLC SG Interests I Ltd. SGP Operating LLC Sharp Image Energy, Inc. SHD Oil & Gas, LLC Shell Oil Company affiliate Shenandoah Resources, LLC Sheridan Production Company, LLC SHOCO Production, L.P. Siena Natural Resources Sierra Resources, LLC Siltstone Resources Operating II, LLC Silver Creek Oil & Gas, LLC Silver Creek Permian OP CO, LLC Silver Hill Energy Partners, LLC Silver Hill Operating, LLC Silver Oak Energy, LLC Silver Spike Energy Silver Tusk Operating Co. LLC Silverback Operating, LLC SilverBow Resources Sinclair Oil & Gas Company SingleTree Resources, Inc. SK E&P Operations America SK Plymouth, LLC Sklar Exploration Company L.L.C. Slant Operating Slawson Exploration Company, Inc. Sloan Petroleum Inc. SM Energy Smith Energy Operating Company Smith Production SN EF Maverick, LLC SN Operating, LLC Snyder Brothers Inc. Sojourner Drilling Corporation Solaris Water Midstream, LLC Sonerra Resources Corporation Sonterra Energy, LLC Sooner Oil and Gas Mgt Inc South Sands Exploration, LLC Southern Bay Operating, L.L.C. Southern Energy Operating, LLC Southern Oklahoma Production Southlake Exploration Inc. Southland Royalty Company LLC Southwest Resources, Inc. Southwest Royalties, Inc. Southwestern Energy Southwestern Energy Ventures Company LLC Sovereign Operating Company LLC SOZO NATURAL RESOURCES LLC Special Energy Corporation SPENCER OIL COMPANY Spess Oil Company Spindletop Oil & Gas Sponte Operating Sponte Resources Spooner Petroleum Company Spring Operating Company Square Mile Energy, LLC SRC ENERGY St. George E TX Operating LLC Stacy Operating LLC Staghorn Petroleum II, LLC Staghorn Petroleum, LLC Stanolind Operating LLC Stanolind Production LLC Star Point Enterprises, Inc. Stasney Well Service, LLC State Line Exploration LLC Statoil Oil & Gas LP Statoil Texas Onshore Properties LLC Statoil USA Onshore Properties Inc. Steller Energy & Investment Corp Stephens & Johnson Operating Co. Stephens Energy Group LLC Stephens Production Company Steward Energy II, LLC Steward Energy, LLC Stingray Oil Company, Inc. Stone Creek Operating, LLC Stone Energy Corporation Stone Oak Operating, LLC Stonegate Production Stormy 8 Operating, LLC Story Oil & Gas, Inc. Stout Energy Inc. Stovall Operating Co. Strand Energy, L.C. Strat Land Exploration Co STRATA PRODUCTION COMPANY Stratex Oil & Gas Holdings Inc Strawn Petroleum Operating, LLC Stronghold Energy II Operating LLC Stroud Petroleum, Inc. Sue-Ann Operating, L.C. Suemaur Expl. & Prod., LLC Sugar Creek Producing Company Summit Discovery Res II LLC Summit Energy Management Summit Petroleum LLC Sunburst, Inc. Sundance Energy Sundown Energy L.P. SunRay Operating Co. Inc. Superior Oil & Gas, LLc Superior Production LLC Surge Operating, LLC Sutherland Energy Co., LLC Sutton PRoducing Corp. SV Energy Company, LLC Swift Energy Operating, LLC SWJN Oil Company Sydson Energy, Inc Synergy Resources Corporation Tabula Rasa Energy Tabula Rasa Energy, LLC Tacitus LLC TACOR Resources, Inc. Talisman Energy USA Inc. Tall City Operations III LLC TALL CITY OPERATIONS LLC Tamarack Petroleum Company, Inc. Tanos Exploration II, LLC Tanos Exploration, LLC Tap Rock Resources Tapstone Energy TAQA North USA, Inc. Tarka Energy, LLC TB Petroleum, LLC. TBK Energy Company TDX Energy, LLC Teakwood Operating LLC Teal Exploration LLC Teal Natural Resources Tecolote Energy Operating, LLC Tecpetrol Operating LLC Tekton Energy Telesis Operating Co., Inc. Tellurian Operating LLC Tellus Operating Group, LLC Tema Oil and Gas Company Templar Operating LLC TEP Barnett USA, LLC TEP Rocky Mountain LLC Terrace Energy Territory Resources Tessera Energy, LLC Tex-Star Production Texakoma Operating, L.P. Texas American Resources Company Texas Energy Holdings, Inc. Texas International Energy Partners Texas Presco, Inc. Texas Royalty Corp Texas Secondary Oilfield Services Texas South Operating Company Texegy Operating Company LLC Texland Petroleum, LP Texon Oil Company, Inc. Texoz E&P I, Inc. Texxol Operating Company TFI Operating TGNR TVL LLC The Cumming Company, Inc. THE DEHART COMPANY THE EDMAR COMPANY, LLC The Termo Company The Warren Corporation Thompson Engineering and Production Corp. Thorp Petroleum Corporation Three J Energy, Inc. Three Rivers Operating Co II LLC Three Rivers Operating Co III LLC Three Rivers Operating Company, LLC Three Sands Oil, Inc. Three Span Oil & Gas, Inc. Three Summits Operating LLC Throne Petroleum Thunder Oil & Gas, LLC Thunderbird Resources LP Tidal Petroleum, Inc. Tidewater Operating Company Inc Tilden Marcellus, LLC Tilford Pinson Exploration, LLC Tillman Consulting LLc, DBA B&C Operating Timber Creek Operating Titan Energy, LLC Titan Exploration, LLC Titan Oil & Gas Titan Operating, LLC Titus Oil & Gas Production, LLC TMR Exploration, Inc. TOC Oil Inc. Toklan Oil and Gas Corp Toklan Oil and Gas Corporation TOP Operating Co. Torch Production Company, LLC Tracker Resource Dev III, LLC Tradition Resources LLC Trail Ridge Energy Partners II LLC Trans Pacific Oil Corp. Trap Rock Oil, LTD. Travis Peak Resources, LLC TreadStone Energy Partners Operating, LLC Treadstone Energy Partners, LLC Trek Resources, Inc. Trendwell Energy Corp Trey Resources Inc. Tri-C Resources, LLC Triad Energy, Inc. Triad Hunter LLC. Triana Energy Triangle USA Petroleum Corporation Tribune Resources, LLC Trigo Oil & Gas Trilogy Operating, Inc. Trilogy Resources, LLC Trinity Operating (USG), LLC Trinity River Energy Operating, LLC Trio Consulting & Management, LLC Triple Crown Resources TriPowwer Resources, LLC Triumph Energy Partners LLC Triumph Exploration, Inc. TRP Energy TRP Operating LLC TRU Operating LLC. True Oil Company LLC True Oil LLC True Wolf Operating, LLC Truevine Operating, LLC Tug Hill Operating, LLC Tundra Operating, LLC Twilight Energy LLC Twisted Oak Operating, LLC TXON Partners LLC TXP, Inc. TYGR U.D. Man, Inc. U.S. Enercorp, LTD. U.S. Energy Development Corp U.S. Energy Development Corp. Uinta Wax Operating, LLC Ultra Resources Umberham Oil Co., Inc. Union Gas Operating Company Union Valley Petroleum Corp Unit Petroleum United Production Company, LLC Unitex Oil Company UpCurve Energy LLC Upham Oil & Gas Company Upland Exploration LLC Urban Oil and Gas Group Ursa Operating Company LLC Utah Gas Corporation V-F Petroleum Inc. VAALCO ENERGY (USA), INC. Valence Operating Company VALIDUS NRG AQUILAS ASSETCO LLC Valley Petrol Consulting Inc Valpoint Operating, LLC Van Operating Vanguard Natural Resources, LLC Vanguard Operating, LLC Vanguard Permian LLC Vantage - Uinta LLC Vantage Energy Appalachia II LLC Vantage Energy Appalachia LLC Vantage Fort Worth Energy LLC Vaughn Good Oil Co. LLC Venado Oil & Gas LLC Venado Oil & Gas, LLC VENADO OPERATING COMPANY LLC Vencer Energy, LLC Venoco Inc Ventex Operating Corp. Venture Oil & Gas Verado Energy, Inc. Verdad Oil and Gas Corporation Verdun Oil Company Veritas Energy, LLC Vermilion Energy USA LLC Vess Oil Corp Viceroy Petroleum Viejo Energy I, LLC Vine Energy Operating LP Vine Oil & Gas LP VirTex Operating Company, Inc. Vitol Resources Inc. of Delaware Vitruvian Exploration II, LLC Vitruvian Exploration IV, LLC W&T Offshore, Inc. W.T. Waggoner Estate Wachob Oil & Gas LLC Waelder Oil and Gas, Inc. Wagon Wheel ArkLaTex, LLC Wagon Wheel Operating, LLC Walsh & Watts, Inc. Walsh Petroleum, Inc. Walter Black Warrior Basin LLC Walter Exploration Company Walter Oil & Gas Corporation Wapiti Operating, LLC Ward Petroleum Warren American Oil Company Warren E&P, Inc. Warwick Investment Group Waterloo Exploration, LLC Wave Petroleum Operating, LLC WBH Energy Partners LLC WCT Operating, LLC Weaver Energy Corporation Weinkauf Petroleum, Inc. Weins Oil & Gas LLC Wellco Energy, Inc. Wellstar Corporation Wesco Operating, Inc. West Texas Oil & Gas Oper., Inc. Western Chief Operating, LLC Western Oil and Gas Development Corp. Western Operating Company Western Production Co. Wexpro Company WFD Oil Corporation WG Operating, Inc. White Butte Oil Co. White Eagle Oil & Gas, LLC White Knight Production LLC White Rock Oil & Gas, LLC White Star Petroleum, LLC Whiting Petroleum Wicklund Petroleum, Inc. WildFire Energy Operating LLC Wildhorse Operating Company WildHorse Resources LLC William H. Lackey Oil & Gas Operating Co. WILLIAMS OIL COMPANY Williford Energy Company Williston Hunter ND LLC Willowbend Investments, Inc. Winchester Energy, LLC Winchester Oil & Gas Windridge Operating LLC Windsor Permian LLC Windy Cove Energy II, LLC Wishbone Texas Operating Co. WN Operating, Inc. Wodbine Acquisition LLC Wolverine Gas & Oil Company of Utah, LLC Woodbine Acquisition LLC Woodbine Production Corp Woodland Resources LLC Woodward Iodine Corporation Woolsey Operating Co. LLC Woolsey Operating Company, LLC Worsham-Steed Gas Storage, LLC WP Oil, LLC WPX Energy Wynn-Crosby Operating, Ltd. Xanadu Exploration Company XCL Resources XPR Resources LLC XTO Energy/ExxonMobil Xtreme Energy Co. Yale Oil Association, Inc. Younger Energy Company Yucca Energy, Inc. Yuma E & P Company, Inc. Zargon Oil (ND) Inc. Zarvona Energy Zavanna, LLC Zenergy, Inc. 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