Exxon ties $80B Kashagan expansion to $150B dispute

ExxonMobil Exxon Mobil Corporation ↘ 1.16% has told Kazakhstan that a potential $80 billion joint investment to develop the western portion of the Kashagan oil field hinges on resolving a long-running dispute worth roughly $150 billion between the government and international oil companies, Bloomberg reported on Thursday, citing people familiar with the matter.worldoil+1

The proposed venture, structured as an equal partnership with state-owned KazMunayGas, would tap the undeveloped western section of the massive Kashagan reservoir in the Caspian Sea, with potential output of up to 600,000 barrels per day. While KazMunayGas has agreed to the proposal, the plan still requires political approval, which remains uncertain.worldoil

A Decades-Long Struggle

When Kashagan was discovered in 2000, it was the largest oil find in decades. But the field has been plagued by delays, technical failures, and cost overruns. Current output from the developed eastern portion stands at about 450,000 barrels per day, with plans to reach 500,000 this year and 710,000 by 2031.worldoil

Kazakhstan's claims against the consortium—which includes ExxonMobil, Shell ↘ 1.23%, TotalEnergies ↘ 0.51%, Eni ↘ 1.22%, and others—cover roughly $150 billion in alleged lost revenue from development delays, plus a nearly $5 billion environmental fine over sulfur storage violations. In July, Kazakhstan froze assets belonging to the North Caspian Operating Company, the field's operator, over the unpaid environmental penalty.wmbdradio+1

The Terms of the Deal

Under ExxonMobil's proposal, other majors currently partnered in Kashagan would be offered minority stakes in the new venture. Companies joining the development would be released from the arbitration claims, while those declining would lose the right to extend their eastern Kashagan license beyond its 2041 expiration.worldoil

The development concept may cost $250 million, with front-end engineering requiring about $2 billion from 2028 and a final investment decision targeted for 2030. ExxonMobil is seeking to unlock roughly 10 billion barrels from the western portion of the field, out of an estimated 16 billion barrels of total recoverable reserves.worldoil

Competing Interests

Eni has separately signaled to Kazakhstan its interest in developing western Kashagan with unnamed partners, adding a competitive dimension to the negotiations. The arbitration case, which has been described as one of the largest investor-state disputes in the energy sector, is expected to stretch until 2028.icij+1

Only about 1 billion barrels have been extracted from Kashagan in its first decade of production—a fraction of the field's potential that underscores both the scale of the opportunity and the complexity of unlocking it.worldoil