Study on Radial Investigation Depth Characteristics of Induction Logging on Heterogeneous Stratum
In induction logging, using geometrical factor to analyze radial investigation depth is a useful way to estimate the radial investigation ability of a logging tool. But radial investigation depth analysis based on DOLL geometrical factor often leads to substantial inaccurate estimates of the true apparent conductivity sain inhomogeneous or invaded ases. Although propagation effect geometrical factor (PEGF) includes both the mutual-effect of eddy flows and the reflection and transmission on the interface of heterogeneous media, it”s too complicated to use.The advanced geometrical factor (AGF) discussed in this paper combines the merits of DOLL geometrical factor and propagation effect eometrical factor. The AGF considers the mutual-effect of eddy flows in nonhomogeneous medium and gives good predictions of two kinds of relations in an axisymmetric inhomogeneous two-layer media in a permissive error scale. One kind of the relations is between radial investigation depth and emission signal frequency. The other is the relation etween radial investigation depth and electrical resistivity ratio of invaded zone and original stratum. Different from usual way of making conclusions from graphs of experimental data, proof formulas and simulations are given in this paper. The conclusions referred to the radial investigation depth characteristics using the Doll GF are compensated y using AGF.
深度感应测井 异构地层 Radial Investigation Depth Characteristics nduction Logging
Zhan Bi-juan Shi Yi-bing Zhang Wei Wang Zhi-gang
School of automation engineering,UESTC
国内会议
2007年油气藏地质及开发工程国家重点实验室第四次国际学术会议
成都
英文
355-360
2007-10-20（万方平台首次上网日期，不代表论文的发表时间）