Study on mechanism of geological storage of carbon dioxide in coal seam and enhanced coal bed methane recovery

摘要

The CO_2 emission in atmosphere results in global climates warm, reduction of CO_2 emission is growing concern of many countries. The geological storage of CO_2 is effective method to reduce CO_2 emission. Because coal seam has strong absorption capacity for CO_2 ,the coal seam can be used as CO_2 geological storage reservoirs, and coal seam has such characteristics that coal seam is preference for CO_2 absorption and postponement for CH_4 absorption, CO_2 injection into coal seam can enhanced coal bed methane recovery, CO_2 -ECBM, because CO_2 and CH_4 compete and absorb in coal seam, CO_2 Displace CH_4, hence coal bed methane can be obtained by The geological storage of CO_2 in coal seam, CH_4 is a energy generated by methane from CO_2 injection into coal seam, CO_2 injection into coal seam can not only reduce CO_2 emission and but also enhance coal bed methane recovery, that is important to environment protection and energy sustainable development.