Multicomponent gas counter-diffusion in coal

澳大利亚的煤层气资源以目前的天然气价格计算超过200亿美元。使用CO2作为增强流体，甲烷的回收率可以提高50%，再增加100亿美元的价值，同时永久安全地隔离CO2，可能的碳信用额高达150亿美元。 煤中二氧化碳、甲烷和其他气体同时交换的性质决定了优化开采的许多工程要求。它是煤储层模拟器开发的基础，目前煤储层模拟器还没有纳入这一关键特征。这个项目旨在理解逆流和交换。

Coalbed methane resources in Australia surpass $20billion at present gas prices. Using CO2 as an enhancement fluid, recovery of methane can potentially be improved by 50% adding a further $10b value, simultaneously permanently and safely sequestering the CO2, with possible carbon credits of up to $15b. The nature of the simultaneous exchange of CO2, methane and other gases within the coal dictates many of the engineering requirements for optimal exploitation. It underlies the development of coal gas reservoir simulators, which currently do not incorporate this critical feature. This project is directed at understanding that counterflow and exchange.