摘要
针对SN油田FA2断块低孔低渗储层发2-5井欠注的问题,研究具有优良缓速和低伤害特性的多氢酸配方体系,优化配方及配套施工工艺,重复酸化降压增注效果显著,有效期长达16个月,累计增注达到7300m3,为江苏油田低渗砂岩储层重复酸化增注探索了一条新途径。
Based on the analysis of reservoir damage and the water absorption capacity declining, a multi - hydrogen acid system applied to resolve less injection water injection well F2 - 5 of FA2 Block with the high pressure, low porosity and low permeability in Shanlan oihqeld. The optimized formulation and operation process parameters and matching operation have been studied. The results of treatments show that the multi - hydrogen acid system has the property of good retarded aciding and low formation damage. The period of validity for well F2 -5 reaches to 16 months and cumulative injection rate increases 7300m^3. All these researches provide a new way for re - acidzing treatment in low permeability sandstone reservoir.
出处
《河南化工》
CAS
2010年第4期19-21,共3页
Henan Chemical Industry
关键词
多氢酸
注水井
降压增注
酸化
multi -hydrogen acid, water-injection well, injection well stimution, acidzing
