ONGC Spuds First Deepwater Exploration Well in Mahanadi Basin Under Samudra Manthan Mission

What Happened ?

Deepwater Exploration Programme

Project Overview:

Key developments include:

• ONGC has commenced drilling of the MN-DW18-1-H-D exploratory well.
• The well is located in the Mahanadi Offshore Basin off the Odisha coast.
• The drilling location is approximately 23 nautical miles from the Konark discovery.
• The project is part of the Government’s Samudra Manthan Campaign to accelerate offshore hydrocarbon exploration. 

Strategic Importance:

The project supports India’s long-term energy objectives by:

• Expanding exploration of deep and ultra-deepwater hydrocarbon resources.
• Increasing domestic crude oil and natural gas production potential.
• Reducing dependence on imported energy.
• Strengthening India’s long-term energy security and self-reliance. 

Offshore Exploration Opportunity:

The Government has undertaken several initiatives to expand offshore exploration.

Key highlights include:

• Nearly one million square kilometres of previously restricted offshore areas have been opened for exploration.
• Future opportunities will be offered through upcoming Open Acreage Licensing Policy (OALP) rounds.
• India’s offshore basins are estimated to contain over 5,600 MMTOE of hydrocarbon resources.
• Recent exploration success has been reported across the Cauvery, Mahanadi and Andaman basins. 

DeepX Mission:

To strengthen its deepwater capabilities, ONGC established the Deepwater Exploration Mission Centre (DeepX) in Mumbai on 5 January 2026.

The centre focuses on:

• Advanced geoscientific interpretation.
• Deepwater exploration technologies.
• Specialised technical training.
• Strategic global collaborations.
• Integrated data management under the “One Company, One Data” philosophy. 

Note:

• The commencement of drilling does not have an immediate financial impact but represents a strategically significant milestone in ONGC’s long-term exploration programme.
• Success at the Mahanadi Basin could enhance India’s domestic hydrocarbon reserves and support future production growth, although exploration outcomes remain inherently uncertain until drilling and evaluation are completed.

Risk Analysis

Summary:

• The project strengthens ONGC’s exploration portfolio but remains subject to the inherent technical and geological risks associated with deepwater hydrocarbon exploration.

Key Risks:

• Commercial hydrocarbon discoveries are not guaranteed during exploration drilling.
• Deepwater projects involve higher technical complexity and execution risks.
• Development timelines may extend depending on exploration outcomes and subsequent appraisal.
• Future commercial production depends on successful resource discovery and economic viability. 

Worst Case:

• If the exploratory well does not identify commercially viable hydrocarbon reserves, the project may not progress to the development and production stage despite significant exploration efforts.

Risk Level: Medium

Company Commentary

• ONGC commenced drilling of its first deepwater exploratory well under the Samudra Manthan Mission.
• The MN-DW18-1-H-D well is located in the Mahanadi Offshore Basin, approximately 23 nautical miles from the Konark discovery.
• The project supports India’s objective of unlocking deepwater hydrocarbon resources and reducing import dependence.
• ONGC continues to strengthen its deepwater capabilities through the DeepX mission and advanced exploration technologies.
• Management views deepwater exploration as a critical pillar of India’s future energy security strategy.