| Relationships | Role | Relationship Start | Relationship End |
| Societe De Gestion Et D'interets Petroliers (Sogedip) | Parent | 12/31/1986 | 12/30/1987 |
| Coparex International (Coparex) | Parent | 12/29/1984 | 12/30/1986 |
| Omnium De Recherches Et Exploitations Petrolieres (Omnirex) | Parent | 1/1/1982 | 12/28/1984 |