海上油田注水井缓速酸深部酸化解堵增注技术研究
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摘要
针对海上油田注水井使用盐酸、土酸酸化解堵措施时有效期短,容易对储层造成二次伤害等问题,通过对目标油田注水储层伤害因素进行分析,结合大量室内实验,研制出一种适合海上油田注水井深部酸化解堵增注的新型复合缓速酸液体系,并对缓速酸体系的综合性能进行了评价。结果表明,相比较于5.0%盐酸溶液而言,该缓速酸体系具有更好的防腐蚀性能、防膨性能以及缓速效果。天然岩心酸化流动实验结果表明,复合缓速酸体系对目标油田储层天然岩心的渗透率改善率能够达到50%左右,是普通盐酸的2倍多,并且其有效期明显延长。
In view of the short validity period of hydrochloric acid and mud acid acidification for water injection wells in offshore oil fields, as well as the secondary damage to the reservoir in the acidification, based on the analysis of waterflooding reservoir damage factors, combined with a large number of experiments, a new type of composite retarded acid system was developed for acidizing plugging removal of deep water injection wells in offshore oilfields,and the comprehensive performance of retarded acid system was evaluated. The results showed that compared with 5%hydrochloric acid solution, the retarded acid system had better corrosion resistance, anti swelling property and slow speed effect. The experimental results of natural core acidification and flow showed that the permeability improvement rate of compound retarded acid system to natural core of target oil field reached 50%, which was more than 2 times that of ordinary hydrochloric acid, and its effective period was obviously prolonged.
In view of the short validity period of hydrochloric acid and mud acid acidification for water injection wells in offshore oil fields, as well as the secondary damage to the reservoir in the acidification, based on the analysis of waterflooding reservoir damage factors, combined with a large number of experiments, a new type of composite retarded acid system was developed for acidizing plugging removal of deep water injection wells in offshore oilfields,and the comprehensive performance of retarded acid system was evaluated. The results showed that compared with 5%hydrochloric acid solution, the retarded acid system had better corrosion resistance, anti swelling property and slow speed effect. The experimental results of natural core acidification and flow showed that the permeability improvement rate of compound retarded acid system to natural core of target oil field reached 50%, which was more than 2 times that of ordinary hydrochloric acid, and its effective period was obviously prolonged.
引文
[1]张勇.国内油田分层注水技术新进展及发展趋势[J].当代化工,2015(11):2605-2607.
[2]涂乙,汪伟英,吴萌,等.注水开发油田结垢影响因素分析[J].油气储运, 2010, 29(2):97-99.
[3]张丽双,李占东,胡秀全,等.低渗油藏水驱合理开发技术政策界限研究[J].当代化工, 2017, 46(5):898-901.
[4]崔刚,沈建军,唐洪明,等. QK18-1油田注水开发储层损害研究[J].油田化学, 2017, 34(3):456-462.
[5]贾艺博,董伟,刘杰,等.疏松砂岩注水开发储层物性变化特征——以孤岛油田为例[J].石油化工应用, 2017, 36(8):98-103.
[6]李杨勇,李恒娟,刘玲,等.一种高效盐酸酸化缓蚀剂的性能评价[J].当代化工, 2014(8):1437-1439.
[7]杨遵旭,燕永利,崔明月,等.泡沫酸配方研究及性能评价[J].能源化工, 2016, 37(5):47-53.
[8]汪双喜,闫龙,桑巍.低成本酸化增注技术在低油价下的推广应用[J].清洗世界, 2017, 33(1):7-12.
[9]李丹丹,王旭,王微微.常规酸化解堵在吴起油田的应用[J].中国科技博览, 2013(27):604-604.
[10]李长城,黄鹏,陈洪,等.适用于碳酸盐岩储层复合有机缓速酸液体系研究[J].当代化工, 2017(3):475-477.
[11]吴大康,刘丽丽,薛俊林,等.合水油田复合缓速酸酸化技术研究[J].长江大学学报:自科版, 2011, 08(10):41-43.
[12]曾双红.低渗油藏酸化解堵工艺技术研究与应用[J].精细石油化工进展, 2017, 18(1):13-16.
[2]涂乙,汪伟英,吴萌,等.注水开发油田结垢影响因素分析[J].油气储运, 2010, 29(2):97-99.
[3]张丽双,李占东,胡秀全,等.低渗油藏水驱合理开发技术政策界限研究[J].当代化工, 2017, 46(5):898-901.
[4]崔刚,沈建军,唐洪明,等. QK18-1油田注水开发储层损害研究[J].油田化学, 2017, 34(3):456-462.
[5]贾艺博,董伟,刘杰,等.疏松砂岩注水开发储层物性变化特征——以孤岛油田为例[J].石油化工应用, 2017, 36(8):98-103.
[6]李杨勇,李恒娟,刘玲,等.一种高效盐酸酸化缓蚀剂的性能评价[J].当代化工, 2014(8):1437-1439.
[7]杨遵旭,燕永利,崔明月,等.泡沫酸配方研究及性能评价[J].能源化工, 2016, 37(5):47-53.
[8]汪双喜,闫龙,桑巍.低成本酸化增注技术在低油价下的推广应用[J].清洗世界, 2017, 33(1):7-12.
[9]李丹丹,王旭,王微微.常规酸化解堵在吴起油田的应用[J].中国科技博览, 2013(27):604-604.
[10]李长城,黄鹏,陈洪,等.适用于碳酸盐岩储层复合有机缓速酸液体系研究[J].当代化工, 2017(3):475-477.
[11]吴大康,刘丽丽,薛俊林,等.合水油田复合缓速酸酸化技术研究[J].长江大学学报:自科版, 2011, 08(10):41-43.
[12]曾双红.低渗油藏酸化解堵工艺技术研究与应用[J].精细石油化工进展, 2017, 18(1):13-16.