低渗透油藏采液采油指数计算方法及影响因素  

Calculation and Influencing Factors of Liquid Productivity Index in Low Permeability Reservoir

作　　者：赵静[1] 刘义坤[1] 赵泉[2] 

机构地区：[1]大庆石油学院石油工程学院,黑龙江大庆163318 [2]吉林石油集团有限责任公司物业管理公司,吉林松原131100

出　　处：《新疆石油地质》2007年第5期601-603,共3页Xinjiang Petroleum Geology

摘　　要：针对低渗透油田储集层物性差、岩性变化大、孔隙结构复杂、非均质性严重等特点,分别给出了只存在启动压力和多种力共同作用时低渗透油田采液、采油指数的计算公式,并分析了油水粘度比、启动压力梯度和含水率对低渗透油田采液、采油指数随含水变化规律的影响。研究结果表明,含水率对低渗透油田采液、采油指数影响程度较大,在相同的含水率情况下,油水粘度比越大,启动压力梯度与生产压力梯度的比值越大,无因次采液指数越大。Based on the characteristics of low permeability oilfield such as poor petrophysical property, varied lithology, complicated porosity texture and serious heterogeneity, etc., the formula for calculation of liquid productivity index and oil productivity index are presented with either starting pressure or multi-force effects, and the effect of oil-water viscosity ratio and starting pressure gradient on changes of such indices with water cut in low permeability oilfield is analyzed. The results show that the effect of water cut on the indices is bigger. In the case of same water cut, the higher the oil-water viscosity, the bigger the ratio between starting pressure gradient and production pressure gradient as well as the dimensionless liquid productivity index.

关 键 词：低渗透油藏 采液指数 采油指数 启动压力 含水率 粘度 

分 类 号：TE331[石油与天然气工程—油气田开发工程]