浅层二维地震勘探技术在鄂尔多斯中北部地质调查中的应用  

Application of Shallow Two-Dimensional Seismic Exploration Technology in Geological Survey of the Central and Northern Part of Ordos

作　　者：杨彦龙[1] Yang Yanlong(Xinjiang Headquarters of China Construction Materials Industry Geological Survey Center,Urumqi,Xinjiang,830000,China)

机构地区：[1]中国建筑材料工业地质勘查中心新疆总队,新疆乌鲁木齐830000

出　　处：《新疆地质》2024年第3期451-458,共8页Xinjiang Geology

摘　　要：浅部地层地质构造条件对地表建筑物选址及地下钻探工程意义重大。针对鄂尔多斯中北部某新能源项目选址及工程建设问题,对浅层地下基岩面、硬质岩及断层分布开展二维地震勘探。在地形地貌及沉积地层等地质条件分析基础上,选定地震测线布置范围;基于干扰波调、地震采集测试及小折射浅层速度分析结果,确定目标地层深度并进行地震观察系统设计;在高精度地震资料处理基础上,进行地震地质剖面解释追踪基岩界面并识别岩性和断层。初至波层析反演对高速异常体的识别结果,验证了地质剖面解释的合理性,为场址选区及工程建设提供重要参考。The geological structural conditions such as underground bedrock surface,hard rock,and fault distribution have a significant impact on the site selection of surface buildings.In response to the issue of site selection for a new energy project in the central and northern part of Ordos,a two-dimensional seismic reflection wave exploration method was designed to study shallow geological conditions for exploration.Based on the analysis of geological conditions such as terrain,geomorphology,and sedimentary strata,the range of seismic survey line layout is selected;Based on shallow velocity analysis,borehole small refraction interpretation,and interference wave investigation results,determine the depth of the target formation and design the seismic observation system;On the basis of high-precision seismic data processing,seismic geological profile interpretation is carried out to track the bedrock interface and identify faults.The identification of high-speed anomalous bodies using first break wave tomography inversion verifies the rationality of geological profile interpretation,providing important reference for site selection.

关 键 词：二维地震勘探 鄂尔多斯 基岩界面 硬质岩 断层检测 

分 类 号：P631.4[天文地球—地质矿产勘探] TE132[天文地球—地质学]