Conclusions

1. Regions favorable to the formation of hydrate have been identified using interpretation of existing seismic data in the deep Indian offshore in water depths ranging from 700 to 3,000 m water depth.

2. Abut 80,000 km2 area is apparently underlain by gas hydrate and subjacent gas deposits.

3. A speculative estimate of about five times the total of conventional Indian gas reserves has been made for methane that may be extracted from hydrate in the Indian offshore. The resource estimates are based on sparse data and are thus only indicative. But the large magnitude of the hydrate resource deserves special attention, and concerted efforts are needed to confirm the figures and draw up a strategy for recoverability, keeping pace with the technological development of deep-water drilling and exploitation techniques.

4. The area of the Bay of Bengal as a potential storehouse of extremely large volumes of hydrates may be unique in consideration of its ideal geological, geochemical, and thermal factors.

5. The Krishna-Godavari offshore is the most favorable area for hydrate in the Indian passive margin in the thick sediments deposited from Miocene to Recent in a growth fault environment. The area lying between 600 and 2,000 m water depth, off the coast of the Mahanadi, Godavari, and Krishna River deltas, is likely to emerge as a huge storehouse of massive hydrate deposits.

6. The Andaman-Nicobar arc basin also displays favorable geological, geochemical, and geophysical attributes favorable for the production of methane and formation of hydrate.

Acknowledgements Thanks to Drs. I.L. Budhiraja and A. Rastogi, and the many Indian geologists who are taking part in the Indian hydrate program. Thanks also to the Indian scientists who originally offered to prepare this contribution but were unable to do so because of administrative difficulties.

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