Petrochina Company Limited

Wuchang Zhang

Jian Nan Guo

Quanjiang Zhang

Liuping Deng

Xiaohua Lian

Xianzhi Wang

Shengfa Mao

Yonggui Mei

Biyun Zhu

Zhanxin Xue

An exploitation method and an exploitation well pattern for coalbed methane in a low-permeability coalbed. The method comprises: determining a maximum principal stress direction in a low-permeability coalbed; disposing at least two large-roadway horizontal wells in the low-permeability coalbed; disposing a plurality of production wells on two sides of a horizontal segment of each of the at least two large-roadway horizontal wells, wherein a diameter of each of the production wells is smaller than a diameter of the horizontal segment; exploiting the coalbed methane in the low-permeability coalbed through the at least two large-roadway horizontal wells and the plurality of production wells. Through the horizontal segments of the large-roadway horizontal wells perpendicular to the maximum principal stress direction, it promotes stress release in low-permeability coalbed to form more fracture channels, thereby improving the exploitation efficiency of the coalbed methane in the low-permeability coalbed.

Exploitation method and exploitation well pattern for coalbed methane in low-permeability coalbed

Growing community of inventors

Beijing, China

Wuchang Zhang