海上 J油田活化水体系配方及性能研究

Formula and Optimal Research on the Activate Water System in J Oilfield Offshore

李 奇 陈士佳 王成胜 高建崇 赵 鹏

LI Qi CHEN Shijia WANG Chengsheng GAO Jianchong ZHAO Peng

为了解决 J油田注水井压力高所导致的注水井欠注问题， 优选出了以复配型表面活性剂 S005为主剂、 黏土稳定剂 HY-01为助剂， 组成为 1×103～ 2×103mg/L S005+2×104 mg/L HY-01的活化水体系， 研究了该活化水体系的地层水配伍性、 耐冲刷性能、 抗盐性能、 耐温性能和热稳定性能。结果表明， 该活化水体系与原油间的界面张力能达到超低数量级， 对膨润土的防膨率大于90%， 具有一定的降压增注效果。该活化水体系具有良好的耐冲刷性能、 抗盐性能和耐温性能。经过冲刷4次后， 活化水体系防膨率保持在85%左右， 防膨率保留率在95%以上。随着NaCl浓度增加， 活化水体系油水界面张力呈数量级下降， 活化水体系对膨润土防膨率保持基本不变。随着温度 （55～82℃） 升高， 活化水体系对膨润土的防膨率增加， 在82℃下老化30 d后对膨润土防膨率超过90%。图6表4参13

In order to solve the difficult water injection of J oilfield due to the high injection pressure，the activate water system， composed of 1×103—2×103 mg/L compounded surfactant S005 and 2×104 mg/L clay stabilizer HY-01，was prepared，and the compatibilities with injection water，interfacial tension，anti-swelling property，salt resistance property，heat resistance property and thermal stability of the innovative system was measured. The results showed that the 2×103 mg/L S005+2×104 mg/L HY-01 activate water system had a great capacity of lowering interfacial tension to ultra-low magnitude（10-3 mN/m）and the anti-swelling rate of the activate water system to the bentonite was higher than 90%. The activate water system had a certain effect of reducing injection pressure and increasing injection. The activate water system had good scouring resistance，salt resistance and thermal stability. After four times washed out，the anti-swelling rate kept over 85% and anti-swelling retention was higher than 95%. With the increase of NaCl concentration，the oil-water interfacial tension decreased in magnitude，and swelling rate kept stable. With increasing temperature from 55℃ to 82℃，the anti-swelling rate increased and the oil-water interfacial tension kept at ultra-low magnitude. In addition，after aged at the temperature of 82℃ for 30 days，the anti-swelling rate was higher than 90% and the interfacial tension kept at 10-3 mN/m magnitude.

10.19346./j.cnki.1000-4092.2017.01.013