State-run Oil and Natural Gas Corporation (ONGC) (NSE: ONGC) has assumed operational control of the CB-OS-02 offshore block in Cambay following a July 22, 2026, Delhi High Court ruling. The transition occurred after the court dismissed a petition by Vedanta Oil & Gas Ltd (NSE: VEDL) challenging the government’s refusal to extend the production-sharing contract.
The handover marks the end of a multi-year administrative impasse that began when the original contract for the Cambay block expired on June 29, 2023. While the government had directed the transfer of operations in a September 19, 2025, letter, the legal battle persisted until a single-judge bench cleared the path for ONGC to resume full management under the government’s nomination regime.
Financial Implications of the Cambay Block Transition
- Vedanta recognized a ₹379 crore impairment charge in Q1 FY27, citing uncertainty regarding the recoverability of assets and receivables linked to the block.
- ONGC has transitioned the asset to its nomination regime, assuming all future decommissioning liabilities through the existing site restoration fund.
- Legal uncertainty remains, as Vedanta has appealed the single-judge dismissal to a division bench of the Delhi High Court, with judgment currently reserved.
Vedanta Oil & Gas Recognizes ₹379 Crore Impairment Charge
The financial impact of the forced transition is most visible on the balance sheet of Vedanta Oil & Gas Ltd. In its recent filings, the company confirmed it ceased recognizing revenue and associated expenses from the Cambay block effective July 22, 2026.
“Considering the recent judicial developments, the absence of a valid PSC and the resulting uncertainty regarding recoverability of assets and receivables relating to the block, the Group reassessed the carrying value of the related balances. Accordingly, the Group has recognised an impairment charge of approximately ₹379 crore during Q1FY27,” Vedanta said, reflecting the group's reassessment of carrying values in the absence of a valid production-sharing contract.
The state-run explorer accounted for its interest in the block as an unincorporated joint venture until the July 21, 2026, cutoff. Since July 22, 2026, the company has operated the site as a government nominee.
| Metric | Status / Value |
|---|---|
| Block ID | CB-OS-02 |
| Vedanta Interest | 40% |
| ONGC Interest | 50% |
| Invenire Petrodyne Interest | 10% |
| Vedanta Impairment | ₹379 Crore |
Delhi High Court Reserves Judgment on Legal Dispute
Despite the change in physical custody of the block, the underlying legal dispute remains unresolved. Vedanta challenged the initial dismissal of its writ petition, escalating the matter to a division bench of the Delhi High Court. Both companies confirmed in regulatory filings that hearings concluded on October 1, 2026, and the court has reserved its final judgment.
The dispute traces back to June 28, 2021, when the joint venture partners initially applied for a contract extension under the government’s 2017 policy. The government’s subsequent denial in September 2025 triggered the litigation that led to the current operational shift. Until the division bench issues its ruling, the long-term status of the block remains tied to the appellate outcome.
Operational Continuity Under Nomination
ONGC has already formalized this shift by applying for a new petroleum lease on July 28, 2026.
“The company has taken over the custody of the block and accounted for its interest in the block as an unincorporated joint venture till July 21, 2026,” ONGC stated in its quarterly filing. Operations continue under the nomination framework, with the state-run firm absorbing the operational risks previously shared among the three-party joint venture.
The division bench of the Delhi High Court was due to deliver its judgment following the conclusion of hearings on October 1, 2026.
Disclaimer: The information provided in this article is for educational and informational purposes only and does not constitute financial advice.
