岩石物理数据反演成像研究  

Inversion imaging of petrophysical data

作　　者：苏本玉 张佳琦 谭登攀 于景邨[2] Li Zhixiong SU Ben-Yu;ZHANG Jia-Qi;TAN Deng-Pan;YU Jing-Cun;LI Zhi-Xiong(Key Laboratory of Gas and Fire Control for Coal Mines,China University of Mining and Technology,Xuzhou 221116,China;School of Resources and Geosciences,China University of Mining and Technology,Xuzhou 221116,China;Faculty of Mechanical Engineering,Opole University of Technology,45-758 Opole,Poland)

机构地区：[1]中国矿业大学安全工程学院煤矿瓦斯与火灾防治教育部重点实验室,江苏徐州221116 [2]中国矿业大学资源与地球科学学院,江苏徐州221116 [3]Faculty of Mechanical Engineering,Opole University of Technology,Opole,Poland 45-758

出　　处：《物探与化探》2025年第1期129-137,共9页Geophysical and Geochemical Exploration

基　　金：国家自然基金项目(42274179、42027801);国家重点研发计划项目(2022YFC3003300)。

摘　　要：岩石物理数据反演能对岩石内部微观裂隙结构进行成像,可洞察岩土内部裂隙的随外界环境变化演化规律,是研究深部岩土灾变机理直观可靠的方法。文章介绍了岩石物理数据的采集系统和电阻率正、反演算法。基于上述工作,分别开展了岩石物理二维和三维反演成像的数值模拟工作,二维反演成像的数值模拟结果表明,该方法可刻画充填高电阻率和低电阻率的毫米级岩石裂隙;三维数值模拟结果表明,该方法对充填高电阻率和低电阻率的毫米级缝洞可进行精确定位和有效识别。针对微波破裂岩石样本,开展了砂岩加热破坏前、砂岩加热至熔融状态和砂岩从熔融状态至冷却3种状态下的数据测量和反演成像工作,初步揭示了微波加热砂岩裂隙变化规律,为研究深部岩土灾变机理提供了一种新的方法。The inversion of petrophysical data can image the microscopic fracture structures inside rocks,revealing the evolutionary patterns of fractures within rocks and soil with changes in external environments.Hence,it is an intuitive and reliable method for investigating the mechanisms of deep geotechnical disasters.This study presented a petrophysical data acquisition system and resistivity-based forward modeling and inversion algorithms.Based on the above,this study conducted numerical simulations of 2D and 3D inversion imaging of petrophysical data.As indicated by the numerical simulation results,2D inversion imaging can characterize millimeter-scale rock fractures with high/low resistivities,whereas 3D inversion imaging can accurately locate and effectively identify millimeter-scale fractures and vugs with high/low resistivities.Moreover,data measurement and inversion imaging were conducted on rock samples subjected to microwave-induced fracturing in three states:heated sandstone before failure,sandstone heated to a molten state,and molten sandstone in a cooled state,preliminarily revealing the variation patterns of sandstone fractures under microwave heating.Overall,this study provides a novel method for exploring the mechanisms of deep geotechnical disasters.

关 键 词：岩石物理 反演成像 岩石微观裂隙结构 深部岩土灾变机理 

分 类 号：P632[天文地球—地质矿产勘探]