斜井各向异性地层阵列侧向测井资料快速分级反演方法  

Fast hierarchical inversion for array lateral logging data of anisotropic formation in deviated well

作　　者：范宜仁[1,2] 吴易智 李潮流 巫振观[1,2] 袁超 邢涛[1,2] FAN Yiren;WU Yizhi;LI Chaoliu;WU Zhenguan;YUAN Chao;XING Tao(School of Geosciences in China University of Petroleum(East China), Qingdao 266580, China;Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China;Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China)

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [2]海洋国家实验室海洋矿产资源评价与探测技术功能实验室,山东青岛266071 [3]中国石油勘探开发研究院,北京100083

出　　处：《中国石油大学学报（自然科学版）》2021年第3期65-74,共10页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家自然科学基金项目(41674131,41974146)。

摘　　要：针对斜井各向异性地层阵列侧向测井响应复杂、资料处理难等问题,提出一种快速分级反演方法。首先,分析侵入、各向异性和地层倾角等对阵列侧向测井响应的影响,并对敏感性进行分级;然后,根据深-中-浅电阻率曲线的分离特性,建立不同倾角条件下的数据库;根据敏感性级别和正演数据库,依次确定各个地层参数的最优反演初值;最后,结合Levenberg-Marquardt算法,提升反演结果的准确性。进一步将反演方法应用于青海油田实际资料,利用岩心分析数据标定和验证,取得了良好的应用效果。结果表明固定倾角条件,阵列侧向测井对侵入深度、电阻率和各向异性的敏感性依次降低;正演数据库的方法解决了传统三维反演速度慢的难题,初值分级选取策略则保证了反演算法的全局寻优能力。An efficient hierarchical inversion scheme is presented targeting complex array lateral logging responses in deviated wells and difficulties in data processing in anisotropic formation.Firstly,effects of invasion,anisotropy and formation dip on the array lateral responses are analyzed,and the sensitivity classification is implemented.Then,according to the dispersion characteristics of resistivity curves with different depths of investigation,the database under different formation dips is established.The initial inverted values are determined optimally.Finally,the accuracy of inversion is improved by the Levenberg-Marquardt optimization algorithm.Furthermore,the calibration and verification of core analysis data are presented in an application of this method in Qinghai Oilfield.The results show that responses of array lateral logging are mainly controlled by the invasion.This method speed up the inversion significantly than traditional 3-D inversions.The global optimization ability of the inversion algorithm is guaranteed by the hierarchical selection scheme.

关 键 词：各向异性电阻率 阵列侧向测井 分级反演 斜井 

分 类 号：P631.8[天文地球—地质矿产勘探]