低渗透底水油藏产能计算及其影响因素  

PRODUCTIVITY CALCULATION AND ITS INFLUENCING PARAMETER STUDIES FOR LOW-PERMEABILITY BOTTOM-WATER OIL RESERVOIRS

作　　者：李东霞[1] 苏玉亮[1] 孙瑞艳[2] 张东[1] 

机构地区：[1]中国石油大学,山东东营257061 [2]中国石化股份胜利油田分公司物探研究院,山东东营257022

出　　处：《大庆石油地质与开发》2010年第5期68-72,共5页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家重点基础研究发展规划＂973＂项目（2006CB705804） ＂泰山学者＂建设工程专项经费资助（ts20070704）.

摘　　要：针对低渗透底水油藏的地质特征,通过将油层段的流动分为2个流动区域：平面径向流动区和近井地带的变截面流动区,分区域运用达西公式,推导并得到了考虑启动压力梯度和介质变形的低渗透底水油藏的产能公式.分别运用矿场统计法、理论计算法绘制了该类油藏的IPR曲线,并研究了启动压力梯度、介质变形、含水率、地层压力对产量的影响.研究结果表明IPR曲线存在最大产量点 相同条件下启动压力梯度越小、变形系数越小、地层压力越高,产油量越高 相同条件下启动压力梯度越小、变形系数越大、地层压力越高,最大产量点对应的压力越高 含水率对最大产量点的位置几乎没有影响.研究成果对合理开发低渗透底水油藏具有理论指导意义.In view of the geologic characteristics of low-permeability bottom-water oil reservoirs, through dividing the flow in oil intervals into two parts ： radial flow and variable section flow nearby the borehole, using Darcy＇ s formula in above two flows, this paper deduces and obtains the productivity formula for low-permeability bottom-water oil reservoirs considering starting pressure gradient and media deformation. Using statistical and theoretical methods respectively, the IPR （inflow performance relationship） curves for the above reservoirs are drawn. At the same time, the influences of starting pressure gradient, media deformation, water cut and reservoir pressure on the production rate are studied respectively. The results show that there is the maximum oil production point on the IPR curve; when the other conditions are the same, the least the starting pressure gradient and deformation factor, the highest the reservoir pressure and oil production; under the same condition, the least the starting pressure gradient, the biggest the deformation factor, the highest the reservoir pressure and the pressure for the maximum oil production point to respond to ; but there is almost no effect of water cut on the position of maximum production point. The above studied results possess the theoretically guiding significance for the rational development of low-permeability bottom-water oil reservoirs.

关 键 词：底水油藏 启动压力梯度 介质变形 IPR曲线 

分 类 号：TE349[石油与天然气工程—油气田开发工程]