随钻电成像仪器磁流激励仿真和图像增强方法  

Magnetic current excitation simulation and image enhancement methods for logging while drilling resistivity imaging tools

作　　者：于增辉[1] 刘保银 卢涛[1] 刘耀伟[1] YU Zenghui;LIU Baoyin;LU Tao;LIU Yaowei(Oil Field Technology Research Institute of China Oilfield Services Limited,Yanjiao 065201,China;Hangzhou Xunmei Technology Company Limited,Hangzhou 310012,China)

机构地区：[1]中海油田服务股份有限公司油田技术研究院,河北燕郊065201 [2]杭州迅美科技有限公司,浙江杭州310012

出　　处：《中国石油大学学报（自然科学版）》2024年第4期92-100,共9页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：中国科学院A类战略性先导科技专项(XDA14020201)。

摘　　要：提出采用磁流替代环形线圈激励源方法模拟随钻电成像仪器(REIT)响应,在考察随钻电成像测井仪器的探测特性基础上进行环境校正方法研究,旨在获得清晰度增强图像。考虑偏心距、地层电性参数、井眼参数变化,建立仪器响应函数库,利用查库方法反演偏心距并对图像进行井眼环境校正和软件聚集增强处理,实现提高图像质量目的。结果表明,采用本文给出的方法可以对仪器原始采集的电信号进行井眼环境校正和图像增强,对提高图像质量、消除井眼环境对测量影响具有良好效果,在成像测井地层评价、随钻电成像地质导向应用中都具有重要意义。This paper proposes using magnetic current excitation instead of a circular coil as the excitation source to simulate the response of drilling electrical resistivity imaging tool(REIT)and investigates the detection characteristics of drilling electrical imaging logging tools.Building on this,environmental correction methods are developed to obtain clearer and enhanced images.The study constructs an instrument response function library by varying the eccentricity,formation electrical parameters,and borehole parameters.A rapid method is used to invert the eccentricity,followed by borehole environment correction and software aggregation enhancement to improve the image quality.Instrument eccentricity affects the button electrode differently,impacting the aggregation effect of the electrode plate and resulting in issues like unclear images,loss of texture details,and poor image balance.The proposed method corrects the original electrical signals in the borehole environment and enhances the images,effectively mitigating the influence of the borehole environment on measurements.This approach is significant for formation evaluation in imaging logging and for geological guidance in electrical imaging while drilling.

关 键 词：随钻电成像 反演 偏心 环境校正 图像增强 

分 类 号：P631.9[天文地球—地质矿产勘探]