CO2-triggered anti-gas channeling plugging agent as well as preparation method and application thereof

The invention belongs to the field of oilfield exploration, and particularly relates to a CO2-triggered anti-gas channeling plugging agent as well as a preparation method and application thereof. A preparation method of the CO2-triggered anti-gas-channeling plugging agent comprises the following steps: (1) dissolving hydroxyethyl acrylate, a monomer containing end group double bonds and a KH570 silane coupling agent in toluene, slowly adding an initiator, heating to 30-40 DEG C, heating to 60-70 DEG C after the initiator is added, and reacting for 5-6 hours to obtain a reaction solution; and (2) adding a hydroxyl-containing compound into the reaction solution obtained in the step (1) to obtain the CO2-triggered anti-gas channeling plugging agent. 本发明属于油田勘探领域，具体涉及CO2触发型防气窜封堵剂及其制备方法与应用。CO2触发型防气窜封堵剂，其结构式为：CO2触发型防气窜封堵剂的制备方法，包括以下步骤：(1)将丙烯酸羟乙酯、含端基双键的单体和KH570硅烷偶联剂溶解在甲苯中，缓慢加入引发剂并升温至30～40℃，加入完毕后升温至60～70℃，反应5～6小时，得到反应溶液；(2)向步骤(1)所得的反应溶液中加入含羟基的化合物，即得到CO2触发型防气窜封堵剂。