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The fate of injected CO2 and the potential for geological storage of CO2 in India

Williams, John. 2013 The fate of injected CO2 and the potential for geological storage of CO2 in India. [Lecture] In: Conference on Clean Coal and Carbon Capture and Storage Technologies, Tiruchirappalli, India, 2-3 Dec 2013. (Unpublished)

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Abstract/Summary

Despite wide-ranging concerns about the negative climatic effects of releasing vast volumes of CO2 into the atmosphere, the combustion of fossil fuels will continue to account for the majority of the world’s energy in the foreseeable future. This is especially true in emergent economies such as India, which are likely to experience significant growth in energy demand due to increasing economic development. Much of the increased energy demand will be met by increased combustion of fossil fuels, particularly coal in the case of India. Inevitably, a corresponding increase in anthropogenic CO2 emissions will result. Capturing CO2 from large stationary emission sources such as power plants, and storing it in the subsurface is one of the potential tools that may be used to reduce these greenhouse gas emissions. This presentation will examine the fate of CO2 following its injection into the subsurface over a variety of time-scales. Once injected, combinations of several different trapping mechanisms act to prevent or slow the movement of the CO2 over time, providing that suitable conditions prevail. Generally the safety of a given storage site will increase over time as more of the CO2 is dissolved into the native formation waters or is chemically trapped to host-rock minerals. The CO2 storage capacity of India is also reviewed. This comprises storage potential in oil and gas fields, coals seams and saline water-bearing reservoir rocks. Sedimentary basins containing natural oil and gas fields are considered to have the highest capacity for CO2 storage in India, and the proximity of these to large stationary emissions sources is examined. Many of the existing and potential future large sources of CO2 in the central parts of India are situated a large distance from those areas thought to have good geological storage potential, which would result in higher transportation costs. However, good storage potential does exist, particularly in some coastal and offshore regions such as the Cauvery, Krishna-Godavari and Mumbai basins. Excellent potential for CO2 storage also probably exists in the Cambay and Barmer Basins, where it may possibly be combined with enhanced oil recovery.

Item Type: Publication - Conference Item (Lecture)
NORA Subject Terms: Earth Sciences
Date made live: 09 Dec 2013 14:50 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/504170

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