The Effects of Gas Adsorption on Swelling, Visco-plastic Creep and Permeability of Sub-bituminous Coal
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چکیده
Unmineable coal is an important resource because of its potential to produce coalbed methane (CBM). CBM has grown to supply approximately 10% of US natural gas production and is becoming important worldwide as an energy source [1]. Furthermore, when CO2 is injected, it has the potential to enhance the amount of methane produced (ECBM) and to geologically sequestrate CO2 as an adsorbed phase. Thus, coalbeds also present a potential sink for greenhouse gas storage. Despite this great potential, the feasibility of ECBM and sequestration of CO2 at a given site is still largely dependent on predictions from numerical modeling [2]. On the other hand, injection of CO2 will change coal properties [3]. These fundamental issues need to be investigated before simulation or field pilot test.
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