不良胶结水泥环缝隙中高阻流体的过套管电阻率测井响应  

Resistivity logging response of fracture between the casing and cement sheath through casing

作　　者：刘晓博[1] 高杰[1] 高见[1] 马翔飞[1] 

机构地区：[1]中国石油大学(北京)地球物理与信息工程学院,北京102249

出　　处：《地球物理学进展》2010年第6期2078-2083,共6页Progress in Geophysics

基　　金：北京市自然基金项目(1083011);国家自然基金项目(10705049)联合资助

摘　　要：考虑不良胶结水泥环缝隙中高阻流体对地层横向电阻的影响后,由传输线方程实现了缝隙中含流体的过套管电阻率测井响应的计算,并考察了缝隙中高阻流体的过套管电阻率测井响应.算例表明:水泥环不良胶结缝隙中的高阻流体对低阻地层视电阻率测量结果会有较大的影响;地层视电阻率曲线与流体包围套管的扇环张角呈非线性关系,高阻流体环比高阻流体扇环有更高的电阻率测井响应.When the fracture between the casing and cement sheath is filled with high-resistance fluids. Considering the effect of the high-resistance fluid on the transverse resistance of formation, the calculation of resistivity logging response of the high resistance fluid in the fracture has been realized through solving transmission line equation. The effect of the fracture on resistivity logging response has been studied. The results show that when the fracture between the casing and cement sheath is filled with high-resistance fluids, the high-resistance fluids will impose an important effect on the resistivity logging response of low-resistance formation through casing. The results also show that apparent resistivity has nonlinear relation with subtended angle of sector fracture, the resistivity logging response of annular fracture is much larger than that of sector fracture.

关 键 词：水泥环不良胶结 过套管电阻率测井 传输线方程 测井响应 

分 类 号：P631[天文地球—地质矿产勘探]