双河油田聚合物驱后微观剩余油分布特征  

Microscopic Distribution Characteristics of Residual Oil after Polymer Flooding in Shuanghe Oilfield

作　　者：李洪生 LI Hongsheng(Exploration and Development Research Institute,Henan Oilfield Company of Sinopec,Zhengzhou 450000, Henan, Chin)

机构地区：[1]中石化河南油田分公司勘探开发研究院,河南郑州450000

出　　处：《西安石油大学学报（自然科学版）》2018年第3期69-74,共6页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：中国石油化工股份有限公司重大科技专项"聚合物驱后油藏水驱提高采收率技术"(P16055)

摘　　要：为进一步认识聚合物驱后油藏微观剩余油分布特征,以河南双河油田天然岩心铸体薄片真实孔喉为基础制作微观仿真模型,采用微观模型驱油实验以及图片分析方法研究了不同渗透率模型水驱后、聚合物驱后微观剩余油分布特征。结果表明,水驱后剩余油以簇状、柱状分布为主,少部分以膜状、孤岛状和盲端/角隅状分布;聚合物驱对各个形态剩余油均有不同程度的驱替效果,对簇状、盲端/角隅状剩余油驱替效果尤为明显;聚合物驱后微观剩余油形态仍以簇状、柱状剩余油为主,膜状、孤岛状剩余油比例上升明显。In order to further understand the nficroscopic distribution characteristics of remaining oil in reservoir after polymer flooding, the nfieroseopie oil displacement simulation models were made based on the east thin slices of natural cores from Shuanghe oilfield. The nfieroseopie distribution characteristics of remaining oil in the models with different permeability after water flooding and after polymer flooding were studied by nfieroseopie model oil displacement experiments and picture analysis method. The results show that, after water flooding, most of the remaining oil exists in the forms of cluster and column, and only a small portion of the remaining oil exists in the forms of film,island and blind end/corner; polymer flooding has different displacement effects on the residual oil distributed in various forms,but it has better displacement effect on the remaining oil distributed in the forms of cluster,blind end/eorner;afler polymer flooding, the remaining oil also distributes mainly in the forms of cluster and column, and the proportion of the remaining oil distributed in the forms of film and island increases.

关 键 词：聚合物驱 剩余油分布特征 微观仿真模型 驱油实验 双河油田 

分 类 号：TE327[石油与天然气工程—油气田开发工程]