Development and prospect of coalbed methane drilling technology in Henan province

Abstract:

Since the coalbed methane（CBM） drilling construction was carried out in 2003， the geological prospecting team of Henan province has actively carried out technological innovation research， and developed special equipment such as large diameter wireline coring equipment and jet hole-expanding tunneling device. The construction technology research and practice of CBM parameter wells， horizontal wells， mining wells and cross-mining wells have been carried out， and the drilling construction technology system covering all types of CBM wells has been formed， which has accumulated rich practical experience and promoted the development of CBM industry in China. On the basis of summarizing the achievements of Henan geological exploration units in CBM drilling technology， this paper puts forward some suggestions for technical research on horizontal well drilling technology of high-efficiency CBM， pneumatic directional drilling technology and key technologies of tectonic coal development and drilling in combination with the development needs of domestic industries such as the gradual increase of CBM development depth， the gradual increase of goaf covered area and the failure to achieve breakthrough in tectonic coal CBM.