Abstract:

The Permian coal measures in Yizikong basin in Liupanshui area have workable seams of 20- 40 m thick with gas content of 10- 20 m²/t. Coals are mainly of rich coal, coking coal and lean coal, which are favorable for development of cleat. Coals are in massive or lumpy texture. Permeability of coalbed is relatively high. The basin has coalbed methane resources of 358.78 billion m³ with an average abundance of 429 million m³/km². Therefore, prospects for exploration and development of coalbed methane in the basin are bright. Evaluation through drilling several wells in the basin shows that Jinzhuping block is a favorable area with further exploration and development potential, while Liangshan block is a poor area without any development value.

Key words: coalbed methane, gas content, exploration and development, gas production rate, water production rate