渗透率间断与变产量的拟表皮系数的研究  

A Study of Pseudo-skin Factor Caused by Permeability Discontinuity and Production Rate Variation

作　　者：王新海[1] 周国隆[2] 

机构地区：[1]江汉石油学院地质系,湖北省荆州市434120 [2]塔里木石油勘探开发指挥部试油处

出　　处：《油气井测试》1998年第4期14-17,73-74,共6页Well Testing

摘　　要：各种偏离理想渗流的因素均会产生表皮效应，在评价地层损害时，需从总表皮系数中分离出非地层损害的拟表皮系数。对于渗透率线性间断或楔形间断清形，当外域渗透率较内域渗透率小时，渗透车间断产生正拟表皮系数；当外域渗透率较内域渗透率大时，渗透车间断产生负拟表皮系数。不渗透边界产生正拟表皮系数；定压边界产生负拟表皮系数。当产量由小变大时，变产量产生负拟表皮系数，当产量由大变小时，变产量产生正拟表皮系数。All the factors deviated from ideal porous flow may cause skin effect,when evaluating formation damage, pseudoskiri: factor of non formation damage must be separated from total skin factor. For the case of linear discontinuity and wedging discontinuity of permeability, when external permeability is smaller than internal permeability,permeability discontinuity causes positive pseudo-skin factor; while external permeability is bigger than internal permeability, permeability discontinuity causes negative pseudo-skin factor. Non-permeable boundary causes positive pseudo-skin factor; while constant pressure boundary causes negative pseudo-skin factor- When production rate changes from small to big, production rate variation causes negative pseudo-skin factor; while production rate changes from big to small, production rate variation causes positive pseudo-skin factor.

关 键 词：表皮效应 表皮系数 渗透率 井流量控制 地层损害 油气藏评价 

分 类 号：TE3[石油与天然气工程—油气田开发工程]