作　　者： ; ; ; ; ; ;

机构地区： 燕山大学车辆与能源学院石油工程系

出　　处： 《油气地质与采收率》 2010年第6期90-93,共4页

摘　　要： 为了全面研究中国中东部某油田低流度油藏渗流与增油机理,解决其开发过程中出现的启动压力梯度大、水驱效率低等问题,对取自该油田低流度油藏岩心进行了单相及两相渗流实验。研究结果表明,流度直接影响着启动压力梯度,从而使储层流体渗流呈现非线性特征,启动压力梯度函数能较好地揭示启动压力梯度与流度之间的变化关系。全面分析了研究区储层的相渗特征,注水倍数与水驱效率、含水率及最终驱油效率与绝对渗透率的关系。研究认为,流度仅为影响该低流度油藏渗流的一个因素,要提高低流度油藏水驱效率及原油动用程度,须系统考虑储层的微观孔隙结构,进一步加大精细油藏描述的力度。 In order to study thoroughly the fluid mechanics and oil enhancement mechanism in one low permeable reservoir,and the development problems such as high startup pressure and low water driving efficiency,the single and two-phase flow experiments have been carried out based on the core drilled from this low mobility reservoir.The experimental results indicate that the threshold pressure gradient controls the startup pressure gradient,and makes the fluidity curve in non-linear form,moreover,the function of threshold pressure gradient can describe the relationship between threshold pressure gradient and fluidity.This paper also analyzed relation-ships among water saturation and facie permeability,total injection volume and water content,total injection volume and displacement efficiency,permeability and ultimate displacement efficiency.The results show that the fluidity is only one factor affecting the percolation feature of low permeable reservoir.Research of microscopic pore structure and detailed reservoir description are also indispensable to improve the water-flooding efficiency and reserve tapping efficiency.

关 键 词： 低流度油藏 渗流特征 渗流实验 启动压力梯度函数 水驱效率

领　　域： [石油与天然气工程]