水锁机理的定量研究  

The quantitative study on water blocking mechanism

作　　者：贺承祖[1] 华明琪[1] 

机构地区：[1]成都理工学院二系

出　　处：《钻井液与完井液》2000年第3期1-4,共4页Drilling Fluid & Completion Fluid

摘　　要：根据达西公式及相对渗透率曲线和毛管压力曲线的表示式,提出了一个描述水锁机理及其影响因素的简化的数学模型。该模型表明,外来水粘度高、侵入深或储层致密时可出现明显的暂时性水锁;固相堵塞储层孔隙或储层原生水饱和度异常低时,可出现永久性水锁。This paper presents a simplified mathematical model for describing the water block mechanism and its influences, based on Darcy's formula and relative permeability curve and capillary pressure curve. It shows that temporary water block is likely to happen when viscous extraneous water invades deep in the tight formation; when pores of reservoir are blocked by solids or original water saturation is abnormally low, permanent water block can occur.

关 键 词：水锁 数学模型 定量分析 饱和水 油气渗透率 

分 类 号：TE311[石油与天然气工程—油气田开发工程] TE319