1 EXHIBIT 21 SUBSIDIARIES State or Jurisdiction of ------------------------ Name Organization Ref ---- ------------ --- Samedan Oil Corporation Delaware (1) Samedan Oil of Canada, Inc. Delaware (3) Samedan of North Africa, Inc. Delaware (3) Samedan North Sea, Inc. Delaware (3) Samedan Oil of Indonesia, Inc. Delaware (3) Samedan Pipe Line Corporation Delaware (3) Samedan Royalty Corporation Delaware (3) Samedan of Tunisia, Inc. Delaware (3) Samedan of Papua New Guinea, Inc. Delaware (3) Noble Gas Marketing, Inc. Delaware (1) Noble Gas Pipeline, Inc. Delaware (2) Noble Trading, Inc. Delaware (1) NPM, Inc. Delaware (1) Samedan LPG CFC* (4) Samedan Methanol CFC* (5) Energy Development Corporation New Jersey (3) Energy Development Corporation (Argentina), Inc. Delaware (6) Energy Development Corporation (China), Inc. Delaware (6) Energy Development Corporation (HIPS), Inc. Delaware (6) Energy Development Corporation (Peru), Inc. Delaware (6) EDC (Tunisia), Inc. Delaware (6) EDC Ecuador Ltd. Delaware (6) EDC Senegal Ltd. Delaware (6) EDC Australia Ltd. Delaware (6) EDC Portugal Ltd. Delaware (6) Gasdel Pipeline System Incorporated New Jersey (6) Producers Services, Inc. New Jersey (6) HGC, Inc. Delaware (6) Pelto Oil Company, Inc. New Jersey (6) EDC (UK) Ltd Delaware (6) Brabant Petroleum Limited CFC* (6) Industrial Scotland Energy Ltd. CFC* (6) Brabant Oil Ltd. CFC* (6) Brabant Oilex Ltd. CFC* (6) Brabant Petroleum USA Company Kansas (6) Burnside Overseas Exploration Limited CFC* (6) EDC Marketing Company CFC* (6) (1) 100% owned by Noble Affiliates, Inc. (Registrant) (2) 100% owned by Noble Gas Marketing, Inc. (3) 100% owned by Samedan Oil Corporation (4) 100% owned by Samedan of North Africa, Inc. (5) 100% owned by Samedan LPG. (6) 100% owned by Energy Development Corporation * Controlled Foreign Corporation