Shale gas

Shale gas refers to natural gas that is found trapped within shale formations. Shales are fine-grained sedimentary rocks that can be rich resources of petroleum and natural gas. Sedimentary rocks are rocks formed by the accumulation of sediments at the Earth's surface and within bodies of water. Common sedimentary rocks include sandstone, limestone, and shale.

Shale gas exploration is the new focus area in the US, Canada and China as an alternative to conventional oil and gas for meeting growing energy needs.United States of America and Canada are the two major , which have commercially exploited Shale Gas resources.

Indian Government has already initiated actions to formulate a policy on Shale Gas. Detailed studies are being taken up to identify the prospective basins/areas and estimation of Shale Gas resources in the country.

As per available data, six basins - Cambay (in Gujarat), Assam-Arakan (in the North-East), Gondawana (in central India), KG onshore (in Andhra Pradesh), Cauvery onshore and Indo-Gangetic basins, hold shale gas potential.

As a part of R & D project, a shale gas well in Raniganj basin (RNSG-I) has been spudded by Oil and Natural Gas Corporation Limited (ONGC) and drilling is in progress. In India, Shale Gas exploration has not entered the commercial stage.

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