| Oriental Energy Resources Limited, Carlton Energy Group LLC, Trinity Gas Corporation, Concession, 1999 (Main Contract) |
| Cliveden Petroleum Ltd, CNPC International Limited, Amendment, 2009 |
| Cliveden Petroleum Ltd, CNPC International Limited, Amendment, 2017 |
| Cliveden Petroleum Ltd, CNPC International Limited, Amendment, 2017 (1) |