聚合物驱后剩余油存在的地质界限  

Geological limits of the presence of residual oil after polymer flooding

作　　者：李丽丽[1] 宋考平[1] 杨晶[1] 张继成[1] 王晓红 

机构地区：[1]大庆石油学院提高油气采收率教育部重点实验室,黑龙江大庆163318 [2]长城钻探稠油技术中心,辽宁盘锦124010

出　　处：《大庆石油学院学报》2009年第5期47-51,共5页Journal of Daqing Petroleum Institute

基　　金：国家自然科学基金项目(10172028);黑龙江省杰出青年基金(200601);国家自然科学基金项目(50634020)

摘　　要：利用Eclipse数值模拟软件,对聚驱后正韵律厚油层顶部、连通差型、分流线部位、成片分布差油层剩余油存在条件的地质界限进行定量,并根据驱油效率划分水洗级别,研究剩余油存在条件的渗透率级差、油层厚度、油层厚度比、面积比、井距、井网类型的界限值.结果表明:剩余油存在的渗透率极差界限值均为3,井距的界限值均为150 m,正韵律厚油层顶部剩余油存在的厚度界限值为2 m,连通差型、成片分布差油层剩余油存在的厚度比界限值均为2,分流线部位剩余油存在的井网类型为五点法井网,成片分布差油层剩余油存在的面积比的上限值为1/2,下限值为19/60.当油田聚驱后剩余油存在条件的地质界限值大于上述值时,该油田应作为下步重点挖潜对象.The Eclipse numerical simulation software is used to study the distribution of remaining oil on the top of the right rhythm thick oil layer,poor connectivity type,split-site,and the film distribution of the poor oil layer after polymer flooding;then qualitative analyses are carried according to it.On the basis of the displacement efficiency,the washed-level and determine the limits value of the presence of the remaining oil,including the permeability differential,the reservoir thickness,the ratio of the reservoir thickness,the area ratio,the well spacing,and the pattern types are classified.The results show that all the permeability differential limit value of the remaining oil presence is 3,all the well spacing limits value is 150 m,the thickness limits value of the remaining oil presence on the top of the right rhythm thick oil layer is 2 m,the pattern types of the remaining oil presence in split-site is 5 pattern types,the area ration upper limits value of the remaining oil presence in a film distribution of the poor oil layer is 1/2,and the lower limits value is 19/60.When the geological limits value of the condition of the remaining oil presence after polymer flooding is greater than the threshold value,the oil field should be regarded as having important tapping potential.

关 键 词：聚合物驱 数值模拟 水洗程度 剩余油 存在地质界限 

分 类 号：TE357.43[石油与天然气工程—油气田开发工程]