油田产出污水回注对储层伤害评价

Formation Damage Evaluation of Oilfield Produced Water Reinjection

在油气田生产过程中会产生大量的污水,为了维持生产和减少环境污染,需要对产出的污水进行处理回注到储层中,这种方式被各油田普遍采用。文章对某联合站处理后水质进行分析,证明油田产出污水得到了较好的处理。对处理后污水开展速敏性和水敏性评价试验,结果表明:注入水和模拟油速敏程度以及模拟地层条件水敏试验结果均为中等偏弱,可满足油田生产需要。

Large amounts of sewagewill produced in the process of oil and gas production.In order to maintain production and reduce the pollution to environment,the produced sewage should be treated and recycled into the reservoir.It is acommon way in most oilfields.By means of analyzing water quality before and after treatedat amulti-purpose station,the results indicated the oilfield produced-water had been treated well.Evaluation tests onwater sensitivity and velocity sensitivity of the treated water were carried out.The results demonstrated the velocity sensitivity level of injectedwater and simulative oil and water sensitivity test at simulative formation circumstance were medium weak which could meet the demand of oilfield production.