摘要
为了准确表征水驱开发油藏高含水期驱替程度和波及系数变化规律,根据高含水期油水相渗曲线变化特征,利用前人研究成果,建立了水驱驱替程度E_d和体积波及系数E_v与含水率f_w的关系式,并以鄯善油田三间房组油藏为例,研究了方法改进前后上述参数在油藏高含水期的变化规律。结果表明:油藏进入高含水期,f_w—E_d关系曲线由上凹渐变为下凹,水驱驱替程度E_d随含水率变化速率加快;E_v—f_w关系曲线由下凹渐变为近平台状,体积波及系数E_v随含水率变化速率减缓。研究揭示的高含水阶段水驱参数变化更加真实地反映地下水驱状况,对预测水驱油田高含水期开发动态有积极意义。
To accurately characterize the displacement degree and sweep efficiency variation of water-drive reservoir at high water-cut stage,a relationship among waterflooding displacement degree Ed,volumetric sweep efficiency Ev and water cut fw has been established based on previous researches about oil/water relative permeability variations at high water-cut stage,and the comparison of the method before and after the improvement has been conducted by taking Sanjianfang reservoir in Shanshan oilfield as an example.The results show that when the reservoir enters the high water cut stage,the fw vs.Ed curve goes from an up?concave shape to a down?concave shape and Ed changes faster with the change of the water cut;the Ev vs.fw curve changes from a down-concave shape to an approximate flat shape and Ev changes more slowly with the change of the water cut.The variations of these parameters at the high water cut stage revealed by the study can reflect the underground status of the waterflooding,which is of great significance for the development performance prediction at high water-cut stage.
作者
薛江堂
刘珍
薛龙龙
廖华伟
张海霞
舒坤
XUE Jiangtang;LIU Zhen;XUE Longlong;LIAO Huawei;ZHANG Haixia;SHU Kun(PetroChina Tuha Oilfield Company,Research Institute of Exploration and Development,Hami,Xinjiang 839009,China;PetroChina Tuha Oilfield Company,Santanghu Oil Production Plant, Hami,Xinjiang 839009,China)
出处
《新疆石油地质》
CAS
CSCD
北大核心
2018年第5期573-577,共5页
Xinjiang Petroleum Geology
基金
中国石油科技重大专项(2017E-04-07)
关键词
鄯善油田
三间房组油藏
水驱油藏
高含水期
水驱驱替程度
体积波及系数
含水率
油水相渗比
Shanshan oilfield
Sanjianfang reservoir
water.drive reservoir
high water.cut stage
displacement degree
volumetric sweep ef-ficiency
water cut
oil/water relative permeability ratio
