公开(公告)号：US20240110465A1

公开(公告)日：2024-04-04

申请号：US18027605

申请日：2021-12-27

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： WEI YANG ,  ZENING WEI ,  CHENG ZHAI ,  Yihan WANG ,  WENYUAN WANG ,  WENXIAO ZHANG

IPC: E21B43/00 ,  E21B34/06 ,  E21B43/1185 ,  E21B43/248 ,  E21B43/263 ,  E21B49/00 ,  G01N33/00

CPC classification number: E21B43/006 ,  E21B34/066 ,  E21B43/1185 ,  E21B43/248 ,  E21B43/263 ,  E21B49/00 ,  G01N33/0027 ,  E21B7/046

Abstract: A method for shale gas exploitation includes performing horizontal drilling operation on an area to be constructed, forming a crack around a horizontal drill hole wall by shaped charge perforation; expanding the crack around a horizontal hole hydraulic fracturing, and extracting methane gas after a fracturing fluid is discharged; after methane gas is reduced, performing in-situ combustion explosion fracturing on the methane involved in horizontal drilling; thereafter continuing to expand the crack in the horizontal drill hole such that methane continues to seep out, and continuing extracting methane; repeating combustion explosion fracturing and extraction operations, so as to increase combustion explosion cracking permeability, and greatly enhance the exploitation effect of shale gas. The method is suitable for fracturing reconstruction of unconventional oil and gas reservoirs such as shale gas reservoirs, coal seam gas reservoirs and tight sandstone gas reservoirs.