利用常规测井信息计算储层伤害表皮系数初探  

Preliminary Study on Calculation of Formation Damage Skin Factor by Conventional Well-Logging Data

作　　者：郑力会[1] 张鹏[1] 牛纪颖 王相春[1] 

机构地区：[1]中国石油大学(北京)石油工程教育部重点实验室,北京102249

出　　处：《油气井测试》2010年第2期32-35,共4页Well Testing

基　　金：中国石油科技创新基金(2008D-5006-03-03);教育部"长江学者和创新团队发展计划"(IRT0411)资助

摘　　要：以粒度中值、孔隙度、地层电阻率为中间参数,建立自然伽玛、声波、密度、双侧向电阻率测井数据与未损害区、损害区地层渗透率的数学关系;计算污染半径可以用三种方法,一是以谭氏方法为基础,建立污染半径与深浅侧向测井电极系数及冲洗带、深、浅侧向电阻率、工作流体实测井径的函数关系。二是以雍氏方法为基础,建立污染半径与深、中感应、微球形聚焦电阻率及深感应、浅聚焦侵入带几何因子的函数关系。三是以图版法为基础,建立污染半径与深浅双侧向、微球形聚焦电阻率及井眼半径的函数关系。根据实际资料相关性选择不同的方法;井半径由井径测井直接测得。由此,储层伤害表皮系数可以表达为含有待定系数的自然伽玛、声波、密度等的常规测井数据。为利用测井信息计算表皮因子提供了可能。The mathematical relation between permeability in damage/undamaged area and logging data of GR,DTL,density log,neutron log,DLL etc.is established based on intermediate parameters such as median of grain diameter,porosity and formation resistivity etc..Damaged radius can be calculated in three ways.The first one is,based on Tan's method,establishing functional relation between damage radius and electrode coefficient of lateral logging of flushed /shallow/deep zone,and borehole diameter measured by working fluid;The second one is,based on Yong's method,establishing functional relation between damage radius and resistivity of deep/medium micro-spherical focus,geometric factor of deep investigation induction and shallow focus of invaded zone;and the third one is,based on type-curve matching method,establishing functional relation between damage radius and resistivity of deep/shallow dual laterlog,resistivity of micro-spherical focus and borehole radius etc.That which method is chosen depends on actual test data.Wells radius can be measured by logging data directly.Therefore formation damage skin factor can be expressed by conventional logging data including coefficients of the natural gamma,sonic wave,density etc.,and so it is made possible to calculate skin factor by Logging information.

关 键 词：常规测井信息 计算 储层伤害表皮系数 渗透率 污染半径 井径 

分 类 号：P618.13[天文地球—矿床学]