摘要
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1×10~3~2×10~3mg/L S005+2×10~4mg/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%。
In order to solve the difficult water injection of J oilfield due to the high injection pressure, the activate water system, composed of 1 ×10^3-2×10^3 mg/L compounded surfactant S005 and 2×10^4 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 2×10^3 mg/L S005 ＋ 2×10^4 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 interracial 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.
出处
《油田化学》
CAS
CSCD
北大核心
2017年第1期58-63,共6页
Oilfield Chemistry
基金
中国海油总公司项目"渤海聚驱产出液中聚合物稳定及含聚污水回注研究"(项目编号CNOOC-KJ 125 ZDXM 06 LTD NFGC2014-01)
关键词
表面活性剂
黏土稳定剂
活化水
降压增注
surfactant
clay stabilizer
chemical additive water system
enhancing water injection
