| Company | NORD-MONTARA OIL AND GAS PROGRAM 1979-II |
| Business Number | 668866 |
| Company | MONTARA OIL AND GAS PROGRAM 1977-II |
| Business Number | 669545 |
| Company | MONTARA OIL AND GAS PROGRAM 1978/1979-I |
| Business Number | 668865 |
| Company | MONTARA OIL AND GAS PROGRAM 1978-II |
| Business Number | 668864 |