江苏沙埝油田注水井酸化酸液配方评价

江苏沙埝油田为实现注水井降压增注,进行了大量的酸化措施,虽取得了一定的效果,但总体来看不够明显,部分措施对注水层造成了二次伤害。因此有必要对使用的酸液配方开展研究,从注水层位的物性和岩矿特性入手,结合岩心溶蚀试验,通过分析,对现场采用酸液的针对性、配方浓度和性能进行评价,总结其不合理之处,以达到指导注水井酸化增注工作的目的。

Acidizing fluid formula evaluation of injection wells of Shanian Oilfield in Jiangsu province

A lot of acidizing treatments have been implemented in order to release pressure and stimulate injection wells of Shanian Oilfield in Jiangsu province.Though achieved some results,it was not so obvious and part of treatments resulted in secondary damage to injection formations,so it was necessary to research into applicable acidizing fluid formula.Physical property and lithology of injection layers were studied firstly associated with core corrosion experiment.Through analysis,concentration and performance of acidizing fluid was evaluated,and its inadaptability was summed up,so as to guide the stimulation treatment of injection wells.