中国石油大学学报（自然科学版）2025，Vol.49Issue(6)：75-84,10.DOI:10.3969/j.issn.1673-5005.2025.06.007
多频油基电成像测井极板间隙影响考察与校正方法
Influence and correction method of electrode gap in multi-frequency oil-based electrical imaging logging
摘要
Abstract
To eliminate the influence of electrode pad gap on imaging quality under oil-based mud well conditions and to ob-tain high-quality wellbore images,the response characteristics of a multifrequency oil-based electrical imaging logging tool were simulated using a three-dimensional finite element method.The effects of operating frequency,borehole environment,and electrode pad gap on the tool's detection characteristics were investigated.On this basis,an image correction method was developed.By integrating multifrequency intersection and phase analysis,a classification-based correction approach was es-tablished for low-,medium-,and high-resistivity formations in oil-based drilling fluid environments.Taking the MFIT multi-frequency oil-based electrical imaging logging tool as an example,the effectiveness of the proposed method was verified using data from experimental wells.The results show that this method significantly improves image clarity and enhances the tool's a-bility to identify wellbore details.Furthermore,it can be applied to image correction for other tools of the same type(such as the Earth Imager).关键词
多频/油基电成像/电测井/极板间隙校正/图像处理Key words
multi-frequency/oil-based electrical imaging/electric logging/stand-off correction/image processing分类
天文与地球科学引用本文复制引用
刘耀伟,刘彦岐,于增辉,张志刚,王芝环,张中庆,刘保银..多频油基电成像测井极板间隙影响考察与校正方法[J].中国石油大学学报（自然科学版）,2025,49(6):75-84,10.基金项目
中国海洋石油集团有限公司关键核心技术攻关项目(KJGG-2022-1401) （KJGG-2022-1401）
