大庆外围低渗透油藏油水渗流规律研究  

Study on Water-oil Percolation Law of Low Permeability Reservoir in Daqing Oilfield

作　　者：李金东[1] 马志强[2] 文华[3] 孙娜[1] 卢继源[4] 

机构地区：[1]大庆石油学院石油工程学院,黑龙江大庆163318 [2]吉林油田试油测试分公司,吉林松源138001 [3]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 [4]大庆油田有限责任公司第五采油厂,黑龙江大庆163514

出　　处：《石油天然气学报》2008年第1期285-288,共4页Journal of Oil and Gas Technology

基　　金：黑龙江省自然科学基金项目(A0313)

摘　　要：由于低渗、特低渗透油藏存在启动压力梯度和毛管力等,使得其油水渗流规律极其复杂,在低含水期含水上升率较高,在高含水期含水上升率较低。根据大庆西部外围低渗透油藏油水相对渗透率曲线研究了低渗透油藏油水渗流规律,对水驱开采的含水上升规律、不同含水条件下采液、采油指数变化规律及原油粘度和启动压力梯度对采液、采油指数随含水率变化规律的影响进行了研究后指出,采液、采油指数的变化受含水率变化影响较大,在相同含水率下,原油粘度越大,启动压力梯度越大,无因次采液指数越大。Low and extra-low permeability reservoirs were start-up pressure gradient and capillary pressure, which made it very complex in the rules of water-oil percolation.The water cut raised rapidly at low water cut stage, and it raised slowly at high water cut stage.According to the curve of water-oil relative permeability in the west of Daqing Oilfield, the rules of water-oil phase percolation were studied, to carry out the research on water cut rising rules of water flooding oilfields, fluid oil productivity index changing rules under different water cut conditions, the influence of crude oil viscosity and the start-up pressure gradient on fluid/oil productivity index with water cut changing rules.The research indicates that the influence of water cut changing rules on fluid/oil productivity index changing rules is very obvious.For the same water cut the higher the crude oil viscosity is, the higher start-up pressure gradient is,the higher dimensionless fluid production index is.

关 键 词：低渗透油藏 相对渗透率 启动压力梯度 采液 采油指数 含水率 

分 类 号：TE312[石油与天然气工程—油气田开发工程]