安塞油田调剖调驱效果评价及相关参数研究

Study on Effect Evaluation and Related Parameters of Profile Control and Flooding in Ansai Oilfield

安塞油田属特低渗透油藏,油藏微裂缝发育、储层非均质性强,随着注水时间延长,动态缝逐步开启及延伸,水驱特征越来越复杂,采油井含水上升,提升油藏水驱开发效果难度加大。因此,在充分认识油藏水驱特征的基础上,通过室内试验研究,在安塞油田规模实施以常规、冻胶、微球为主的适应不同渗流类型油藏的调剖调驱体系,结合实践,本文主要针对裂缝型油藏,系统评价堵水调剖实施效果,并研究与效果相关的参数,为后期精准选区选井、施工参数提供依据,不断提升实施效果。

Ansai Oilfield belongs to an ultra-low permeability reservoir,with developed micro fractures and strong reservoir heterogeneity.With the prolongation of water injection time,dynamic fractures gradually open and extend,and water drive characteristics become increasingly complex.The water content of oil wells increases,making it more difficult to improve the effectiveness of reservoir water drive development.Therefore,based on a full understanding of the characteristics of reservoir water flooding,through indoor experimental research,a profile control and flooding system adapted to different types of reservoirs with conventional,gel,and microspheres was implemented on a large scale in Ansai Oilfield.Combined with practice,this article mainly focuses on fractured reservoirs,systematically evaluates the implementation effect of water plugging and profile control,and studies the parameters related to the effect,providing a basis for accurate selection of wells and construction parameters in the later stage,continuously improving implementation effectiveness.