摘要
超低渗储层酸化技术的配方体系存在针对性强的特点,具有对储层造成二次伤害的风险性。在分析合水油田长8储层矿物成分的基础上,开展了储层的敏感性评价试验,研究了盐酸、土酸和CQC-8、CQF-8缓速酸对合水油田长8储层的酸化适应性。溶失率试验结果表明,盐酸的溶失能力较弱,土酸和CQC-8、CQF-8缓速酸的溶失性能可以满足现场要求;岩心酸化试验结果表明,注入缓速酸后,合水油田长8储层岩心渗透率大幅度提高,CQC-8和CQF-8缓速酸的深部酸化改造效果明显。
The mineral composition,sensitivity and acidification adaptability of hydrochloric acid,mud acid and retarded acid on Chang 8 reservoir in Heshui oilfield were studied in this paper.Experimental results of dissolve-loss ratio show that the dissolve-loss capability of hydrochloric acid is small,and the dissolve-loss capability of mud acid and CQC-8 or CQF-8 retarded acid can satisfy the requirements of acidification treatment.Core tests show that after injecting CQC-8 or CQF-8 into the cores,its core permeability is greatly increased.Acidification tests on lone cores shows that CQC-8 and CQF-8 have an apparent effect on deep acidification as compared with the mud acid.
出处
《长江大学学报（自科版）（上旬）》
CAS
2010年第4期72-75,共4页
JOURNAL OF YANGTZE UNIVERSITY (NATURAL SCIENCE EDITION) SCI ＆ ENG
关键词
酸化
缓速酸
超低渗透储藏
砂岩储层
配伍性
acidification
retarded acid
low permeability reservoir
sand stone reservoir
compatibility
