针对高温水平井存在的定点堵水难题，以淀粉为骨架材料、丙烯酰胺为接枝单体、固体H₂O₂为高温引发剂、钛-三乙醇胺螯合物为触变剂、N，N-亚甲基双丙烯酰胺为交联剂合成了高温水平井环空化学封隔多重网络凝胶，并通过正交实验确定了最优配比。同时对合成产物进行红外光谱表征、触变性能评价和封堵能力测试。结果表明，制得的耐高温水平井环空化学封隔器（ACP）材料性能良好，成胶时间在2~8 h可控；运用储能模量与恢复时间的关系方程和幂律流体方程对材料的触变性能进行评价，由此证明耐高温ACP体系的触变性能良好。采用环形填砂管物理模拟方法测量产物的持压能力，当温度在120~130℃时材料的封堵率达到98%以上，矿化度在20 000 mg/L附近时材料的封堵率达到97%以上。

Aiming at solving the problem of water plugging at fixed location in high temperature horizontal wells,multiple network gel is prepared by using starch as skeleton material,acrylamide as graft monomer,solid H₂O₂ as high temperature initiator,titanium triethanolamine chelate as thixotropic agent,and N,N-methylene bis-acrylamide as cross-linking agent.The optimal formulation is determined through orthogonal experiment.The gel products are characterized by infrared spectrum,thixotropic property evaluation and plugging ability test.It is shown that grafting copolymerization groups are produced in the prepared annulus chemical packer (ACP) for high temperature horizontal wells and the gelation time is controlled in the range of 2-8 hours.The thixotropic property of the material is evaluated by the relationship equation between the storage modulus and recovery time,and the power-law fluid equation,which proves the good thixotropic property of the high temperature resistant ACP system.Pressure holding capacity of the material is measured by means of physical simulation of annular sand filled pipe.It is found that the plugging rate of the material can exceed 98% when the temperature is in the range of 120-130℃,and the plugging rate of the material can surpass 97% when the salinity is around 20 000 mg·L^-1.

廖星奥(1999-),男,硕士研究生,主要从事油田化学和提高采收率技术研究,1924459894@qq.com