The Board of Directors of Oil & Natural Gas Corporation approved a Parent Company Guarantee (PCG) of $500 million on July 28, 2026, to enable its subsidiary Mangalore Refinery and Petrochemicals Limited (MRPL) to import crude oil from Saudi Arabian Oil Company (Saudi Aramco). This financial instrument secures the supply chain for MRPL’s refining operations over a two-year period, ensuring continuity in raw material procurement from one of the world’s largest oil exporters.

Key Details of the Guarantee

The guarantee is structured to cover the period from September 1, 2026, to August 31, 2028. The following table outlines the specific parameters of the board-approved proposal:

Significance of the Development

The approval underscores Oil & Natural Gas Corporation’s strategic support for MRPL’s operational requirements. By providing a parent company guarantee, ONGC mitigates counterparty risk for Saudi Aramco, thereby strengthening the commercial relationship and ensuring stable crude oil flows to MRPL’s refinery in Mangalore. This arrangement is critical for maintaining consistent production levels at the refinery, which relies heavily on imported crude feedstock.

The Board meeting commenced at 13:45 hrs and concluded at 15:35 hrs on July 28, 2026. The decision was communicated to the National Stock Exchange of India Ltd and BSE Limited as part of the standard disclosure process for significant corporate actions.

Oil & Natural Gas Corporation spudded its first deepwater exploratory well, MN-DW18-1-H-D, in the Mahanadi Offshore Basin on July 25, 2026. The commencement of drilling, virtually inaugurated by Petroleum and Natural Gas Minister Hardeep Singh Puri from New Delhi, marks a significant operational milestone under the Government of India's Samudra Manthan Mission. This initiative seeks to unlock India's deepwater hydrocarbon potential, directly addressing national energy security goals by reducing import dependence and enhancing domestic production capacity.

The well is being drilled by Rig Platinum Explorer approximately 23 nautical miles from the Konark discovery site off the Odisha coast. This exploration activity aligns with Prime Minister Narendra Modi’s call in his August 15, 2025 Independence Day address to harness India's untapped offshore oil and gas resources. To facilitate this, the government has opened nearly one million square kilometres of previously restricted offshore areas for exploration through forthcoming Open Acreage Licensing Policy (OALP) rounds.

Strategic Context and Potential

India's eastern and western offshore basins, which extend to water depths of up to 3,000 metres, are estimated to hold over 5,600 MMTOE of hydrocarbon potential. Recent exploration successes in the Cauvery, Mahanadi, and Andaman basins have reinforced the commercial promise of these frontiers. The Mahanadi Offshore Basin specifically has seen strengthened prospectivity following ONGC's recent Utkal and Konark discoveries.

To support this national mission, ONGC launched its flagship Deepwater Exploration Mission Centre, DeepX, in Mumbai on January 5, 2026. DeepX integrates the company's geoscientific expertise, advanced interpretation capabilities, specialised training, and strategic global collaborations under the "One Company, One Data" philosophy. This infrastructure is designed to streamline data analysis and improve decision-making for complex deepwater projects.

What the Numbers Show

The scale of the opened acreage—nearly one million square kilometres—indicates a structural shift in India's upstream exploration strategy towards high-risk, high-reward deepwater zones. With an estimated potential of 5,600 MMTOE across basins extending to 3,000-metre water depths, the focus on the Mahanadi Basin leverages recent nearby successes (Utkal and Konark) to de-risk further exploration. The deployment of the Platinum Explorer rig signals ONGC's commitment to executing technically challenging campaigns that were previously constrained by limited deepwater infrastructure.

Every prospect evaluated and well drilled in this campaign contributes to strengthening India's energy self-reliance. As ONGC moves into deeper waters, the success of wells like MN-DW18-1-H-D will be critical in validating the geological models and attracting further investment in India's offshore energy sector.