摘要
介电测井在分析地层的含水饱和度和区分油水层方面有重要的作用。在给出介电测井幅度比与相位差定义之后,利用解析解和数值模式匹配法计算了几种地层模型的响应曲线。得出的主要结论有:均匀介质中的幅度比与相位差都随介质真电导率的增大而增大;一般情况下,可不予考虑井眼对介电测井响应的影响;幅度比与相位差在分层能力和探测深度上不匹配,相位差的分层能力优于幅度比,但其探测深度比后者差。
Shi Qingdong Feng qining Sang Zuoyuan. Shi Qingdong Doctor Geophysical prospecting China University of Mining and Technology Beijing 100083 China Abstract Dielectric log has important functions in the aspects of analyzing water saturation and telling oil layer from water bearing formation. The definitions of amplitude ratio and phase difference are given in this paper and on the basis of these definitions the analytic solution and the forward program of the numerical mode matching method are applied to compute the response curves of some formation models. The main conclusions are as follows the amplitude ratio and phase difference in homogeneous medium become increasing with the true conductivity increase the effect of borehole on dielectric log response can normally be ignored in bed resolution and radial investigation depth the amplitude ratio does not match with the phase difference which is better than the amplitude ratio in bed resolution but poorer than that in radial investigation depth.
出处
《新疆石油地质》
CAS
CSCD
2000年第5期394-396,共3页
Xinjiang Petroleum Geology
关键词
介电测井
介电常数
探测深度
响应特性
相位差
Dielectric log Dielectric constant Phase Response Investigation depth