Method for treating water and gas channeling outside casing through reservoir protection type circulation method

• Main Authors: LIU ZHIXIONG, HE HUALEI, LI ZHIHONG, ZOU HONGJIANG, SHEN MINGHUA, MIN QI, TANG KAI, LUO LIXIA, GAO GUOCHENG, LIU XIAOKUN
• Format: Patent
• Language: Chinese; English
• Published: 27.06.2023
• 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 belongs to the technical field of oil exploration, and particularly provides a method for treating water and gas channeling outside a casing by a reservoir protection type circulation method, which comprises the following steps of: 1, establishing reservoir pore temporary plugging through reservoir protection gel, 2, drilling an engineering hole in a water outlet layer section, and 3, feeding a packer to a space between a production layer perforation section and the engineering hole by using an oil pipe and packing. The method comprises the steps of building a circulation channel, pumping a plugging agent system into an annular channeling groove outside a casing in the circulation channel, degrading reservoir protection gel, treating a shaft, and perforating and reproducing the reservoir, so that the problem of water and gas channeling caused by incomplete cement sheath outside the casing and the problem of reproducing and increasing production of a production well are solved; the plugging agent