| Relationships | Role | Relationship Start | Relationship End |
| Preussag Aktiengesellschaft | Parent | 12/11/1981 | 12/30/1986 |
| Preussag-Capital Guidance Venture General Partnership | Subsidary | 1/1/1982 | 12/30/1986 |
| Preussag Energy Ventures General Partnership | Subsidary | 1/4/1984 | 12/30/1986 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Preussag Oil And Gas Corp. | Buyer | Discontinued | 12/31/1986 |