公开(公告)号：US20140326450A1

公开(公告)日：2014-11-06

申请号：US14335935

申请日：2014-07-20

Applicant: SICHUAN UNIVERSITY

Inventor： Feng GAO ,  Heping XIE ,  Fubao ZHOU ,  Yang JU ,  Lingzhi XIE ,  Yingke LIU ,  Yanan GAO ,  Jianfeng LIU ,  Ru ZHANG

IPC: E21B43/16

CPC classification number: E21B43/168 ,  E21B43/24 ,  E21B43/247 ,  E21B43/26

Abstract: A pneumatic fracturing method for exploiting shale gas, the method including: 1) applying a compressed gas for a first period of time at a first pressure to a shale formation; 2) applying the compressed gas for a second period of time at a second pressure to the shale formation; and 3) repeating steps 1) and 2) to produce fissures in the shale formation. A temperature of the compressed gas is at least 80° C. A maximum pressure of the compressed gas is at least 25 megapascal, and a minimum pressure of the compressed gas is between ¼ and ⅓ of the maximum pressure.

Abstract translation: 一种开采页岩气的气压破碎方法，该方法包括：1）将第一次压缩的压缩气体以第一压力施加到页岩层; 2）将压缩气体以第二压力施加到页岩层; 和3）重复步骤1）和2）在页岩层中产生裂缝。 压缩气体的温度为至少80℃。压缩气体的最大压力为至少25兆帕，压缩气体的最小压力为最大压力的1/4和1/3。