Full-bore well completion fracturing method for low-permeability reservoir sidetracking well

• Main Authors: BAI JIANWEN, ZHANG KUANGSHENG, YANG HAI'EN, XUE XIAOJIA, CHANG DU, WANG YAOCONG, LIU XINGYIN, ZHENG MINGKE, LIU HANBIN, WANG LAN, SU LIANGYIN
• Format: Patent
• Language: Chinese; English
• Published: 12.02.2021
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention provides a full-bore well completion fracturing method for a low-permeability reservoir sidetracking well. The method comprises the following steps: step 001, determining a target well,and opening a window in the target well to sidetrack a new borehole; step 002, assembling a well completion pipe string; step 003, lowering the well completion pipe string into the target well, and conducting setting; step 004, carrying out well cementation operation on the new borehole; step 005, pulling out the upper half portion of the well completion pipe string to be replaced with a fracturing tie-back pipe string; step 006, implementing perforating fracturing on the reservoir where the new borehole is located by a perforating gun; and step 007, pulling out the fracturing tie-back pipe string, and putting down a production pipe string to be put into production. According to the method provided by the invention, a brand-new wellbore can be built in the sidetracked slim hole of the low-permeability oil field, r