摘要
对于聚驱后转后续水驱的油藏,搞清聚驱后微观剩余油启动方式和机理是进一步动用剩余油、提高采收率的关键。利用微观光刻仿真模型,开展周期注水、增大驱替压力梯度、液流转向三种水驱方式的微观驱油实验,明确了液流转向和增大驱替压力梯度可动用簇状和盲端状剩余油,能明显改善聚驱后开发效果。应用于聚驱后的双河油田核三段V油组上层系和Ⅲ油组油藏,取得了较好的效果,为聚驱后提高采收率提供了依据和方向。
For the reservoir with subsequent water drive after polymer flooding, the key step to further producing remaining oil after polymer flooding and enhancing oil recovery is to find out the starting mode and mechanism of micro remaining oil. Based on the micro lithography simulation model, the micro flooding experiments are carried out in three ways: periodic water injection, increasing displacement pressure gradient and liquid flow steering. It is clear that the cluster and blind end remaining oil can be produced by the liquid flow steering and the increasing displacement pressure gradient, so as to improve the development effect after polymer flooding. After polymer flooding, it has been implemented in the upper layer of V oil formation and III oil formation of Hetaoyuan formation of Paleogene in Shuanghe oilfield, which has achieved good results and provided a basis and direction for further EOR after polymer flooding.
作者
张小静
段秋红
申乃敏
卢俊
张连峰
ZHANG Xiaojing;DUAN Qiuhong;SHEN Naimin;LU Jun;ZHANG Lianfeng(Exploration&Development Research Institute of Henan Oilfield Company,SINOPEC,Zhengzhou,Henan 450048,China)
出处
《石油地质与工程》
CAS
2020年第5期63-68,共6页
Petroleum Geology and Engineering
关键词
双河油田
后续水驱
微观仿真模型
水驱启动方式
Shuanghe oilfield
subsequent water drive
micro simulation model
water drive start-up mode
