Developing status and prospects of gas drilling technology in CBM well

the particularity of coal bed methane reservoir has made the reservoir protection being put into a higher level during the drilling in CBM well. Gas drilling was considered to be one of effective methods to develop the coal bed methane and was used commonly on aboard. The selection of gas drilling manner must take into account the suitable, applied mode, later completion method and the economic. The application, characteristics of coal bed and technique mode of gas drilling applied to coal bed methane development on aboard were firstly analyzed, and then the characteristics of coal bed methane and gas drilling technology in China were investigated, finally the feasibility of introducing gas drilling into CMB development in our country was discussed.