Mendhe, V.A. and sinha, A. (2015) Shale Gas an Emerging Energy Resource: Prospects in India. Indian Mining & Engineering Journal , 54 (6). pp. 21-31. ISSN 0019-5944

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The large production of natural gas from shale formations in the united states has encouraged the Indian petroleum industries to explore the possibilities of shale gas resource in the country. Shale gas is a natural gas produced form shale formations that typically function as both the reservoir and source rock for the gas. In terms of chemical compostion, shale gas is typically a dry gas composed primarily of methane but some formations do produce wet gas. Over the past decade, the combination of horizontal drilling and hydraulic fracturing has allowed access to large volumes of shale gas that were previously uneconomical to produce. India has 26 sedimentary basins occupy an area of 3.14 million sq. km contains Gondwana and Tertiary formations, in which thick shale horizons are available. Coal and lignite are the prime sources of energy in India and thus exclusively explored, but shale is ignored even though it is associated with coal and lignite bearing formations. According to different estimates and comprehensive shale gas pilot project carried out by ONGC in Damodar valley and cambay basin, has made an initial gas-in place estimate of 300 – 2100 trillion cubic feet (tcf). The estimates could increase with collection of additional reservoir information. CSIR-CIMFR has taken a lead role in evaluation of shale gas potentiality studies of sedimentary basin in India. Shale beds encountered and studies for gas-in-place, sorption and other parameters to understand the fundamentals of shale gas reservoir in virgin blocks of South Karanpura, Barmer-Sanchor basin, Raiganj, Neyveli, West Godavari and Narmada Broach, In-sity gas content is observed in the range of 0.26 to 1.75 m3/t on as received basis and 1.42 to 9.28 m3/t on dry ash free basis. Large cumulative thickness of shale beds encourages the huge potentiality of gas even low in-situ gas content. Methane concentration in desorbed gas (70 – 95%) is sufficient for easy use of shale gas after recovery from reservoir. The various relationship established between geological, geochemical, sorption capacity, TOC and rock Eval results, porosity and permeability of shale beds in studied sedimentary basin, which may be useful shale characterization and better understanding of shale gas reservoirs. The latest technologies available for shale gas exploration and well completion can be used for economic recovery of shale gas in India. Also discussed shale gas reservoir economics, technical constraints, environment issues, policies and prospects as energy resource in India.

Item Type: Article
Uncontrolled Keywords: Shale gas, reservoir, methane, prospects and recovery
Subjects: Methane Emission and Degasification
Depositing User: Mr. B. R. Panduranga
Date Deposited: 09 Sep 2015 08:52
Last Modified: 19 Jan 2017 06:04

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