采出井复配防垢剂的制备与性能评价

针对中原油田采出井结垢严重的问题，在实验室中以马来酸酐(MAA)、不饱和酯(CEA)和烯丙基磺酸钠(ASS)为原料，制得防垢剂MAP。根据正交试验，确定了防垢剂MAX，的最佳单体配方：ASS加量为22．0g，CEA加量为9．0g，MAA加量为36．0g，单体质量分数为15％。以氯乙酸和多乙烯多胺为原料，合成了溶垢剂PEPA，确定了溶垢剂PEPA的最佳合成条件：氯乙酸加量为5．2mol，多乙烯多胺加量为1．0mol，NaOH加量为5．2mol，低温反应时间6h，沸腾反应时间2h。并对他们进行了性能评价，结果表明，防垢剂MAP和溶垢剂PEPA-1复配后具有较好的协同作用，防垢率可达98．00％以上，溶垢率可达79．92％。

Preparation and Evaluation of Complex Scale Inhibitor for Production Well

To resolve the problem of serious scale in production well of Zhongyuan Oilfield, the scale inhibitor was prepared from maleic anhydride (MAA) ,unsaturated ester (CEA) , and sodium allylsulfonate (ASS) .The optimum formula of the scale inhibitor MAP was determined by orthogonal experiment as follows: ASS amount 22.0 g, CEA amount 9.0 g,MAA amount 36.0 g,mass percent of monomer 15% .The scale- dissolving agent PEPA was synthesized with chloroacetic acid and polyethylenepolyamine as materials. The optimum synthetic conditions of PEPA were determined as follows: chloroacetic acid amount 5.2 mol, polyethylenepolyamine amount 1.0 mol, NaOH amount 5 .2 mol, reaction time at low temperature 6 h, reaction time under boiling 2 h. The their performances were evaluated . The results showed that the complex of MAP and PEPA - 1 had good synergism, rate of scale inhibition was above 98.00% ,rate of scale solution was up to 79.92% .