浅中深结合的综合物探方法在渝巫地1井选址中的应用  

The Application of the Integrated Geophysical Prospecting Method Combining Shallow⁃Intermediate⁃Deep Exploration in the Positioning of Yuwudi 1 Well

作　　者：董旭 王文彬 宋锡芳 王杰[1] 高远 DONG Xu;WANG Wenbin;SONG Xifang;WANG Jie;GAO Yuan(Changsha General Survey of Natural Resources Center,China Geological Survey,Changsha 410600,China;Green Intelligent Exploration Engineering Technology Research Center of Hunan,Changsha 410014,China;Geophysical and Geochemical Survey Institute of Hunan Province,Changsha 410014,China)

机构地区：[1]中国地质调查局长沙自然资源综合调查中心,湖南长沙410600 [2]湖南省绿色智能勘探工程技术研究中心,湖南长沙410014 [3]湖南省地球物理地球化学调查所,湖南长沙410014

出　　处：《东华理工大学学报(自然科学版)》2025年第1期53-62,共10页Journal of East China University of Technology(Natural Science)

基　　金：中国地质调查局项目(DD20230398,DD20190081)。

摘　　要：野外地质调查发现渝东巫山地区发育浅部岩溶及中深部断裂,给钻探工作带来较大的风险。单一地球物理勘查手段难以准确探测与识别,为了尽可能降低钻探风险,有效识别并规避面临的钻遇岩溶断裂,采用浅中深结合的综合物探方法开展溶洞及断裂探测,确定钻孔有利位置。以渝巫地1井钻孔定位为例,在地质调查基础上,通过开展高密度电法、瞬变电磁法、音频大地电磁测深法和微动勘探法,解释推断井场区域下方可能存在的浅部岩溶及中深部断裂,选定钻孔有利位置,形成了一套类似地区钻前选址的综合物探技术。实际钻进过程中未遇溶洞及断裂发育段,说明采用上述综合物探方法可有效识别岩溶、断裂等不良地质体,合理指导钻孔定位,有效降低钻探风险。成果可为类似地区钻前井位选址提供参考。Field geological surveys have revealed the development of shallow karst and middle-deep fractures in the Wushan area of eastern Chongqing,which pose significant risks to drilling operations.The application of a singular geophysical exploration method proves inadequate for the precise detection and identification of these geo-logical features.To mitigate drilling risks and to effectively identify and circumvent karst faults during drilling ac-tivities,an integrated geophysical prospecting approach that integrates shallow,medium,and deep exploration techniques was employed.This method aims to detect karst caves and faults while determining optimal drilling lo-cations.Using the drilling location of Yuwudi 1 Well as a case study,a comprehensive geological investigation was conducted employing various geophysical methods,including high-density electrical methods,transient elec-tromagnetic methods,audio frequency magneto telluric sounding,and micromotion exploration techniques.These methods were utilized to interpret and infer the potential presence of shallow karst formations and medium-depth faults beneath the well site.The objective was to identify optimal drilling locations and to develop an integrated geophysical exploration strategy akin to pre-drilling site selection in the region.During the actual drilling process,no karst caves or faults were encountered,which suggests that the aforementioned geophysical methods are effec-tive in identifying adverse geological features such as karst and faults.This approach facilitates reasonable drilling positioning and significantly mitigates drilling risks.The findings of this study may serve as a valuable reference for the selection of pre-drilling well locations in similar geological contexts.

关 键 词：断裂 岩溶 综合物探 钻孔定位 渝巫地1井 

分 类 号：P313.3[天文地球—固体地球物理学]