Application of geosteering technology in construction of CBM horizontal well

During drilling of CBM horizontal well, geosteering technology such as geological logging data, gas measurement data, gamma logs is used to keep the well trajectory in the target seam, ensuring the drilled ratio of a seam to meet the requirements of design. The paper analyzed the steering measures with geosteering technology for drilling the horizontal interval of CBM well, summarized the characteristics and role of steering using geological logging, gas measurement and gamma logs. Trough the application case of the horizontal well HCMS-2, the concrete approach was put forward as regard to the integrated use of geosteering technology to drill CBM horizontal well.