摘要
探地雷达方法是一种确定浅层地下介质分布的高分辨率电磁探测技术。国外已将该技术应用到露头地质研究的众多领域中,如三维储层建模研究、沉积相研究、高分辨率层序地层学研究、三维裂缝成像、浅层断层识别、岩溶地质研究等。塔里木盆地巴楚达吾孜塔格地区奥陶系碳酸盐岩出露良好,礁滩复合体、火成岩侵入、岩溶地貌等地质现象丰富,使用32～500MHz探地雷达对该区露头进行了试验性研究。结果表明,探地雷达的探测深度最大可达20m,分辨率最大可达到分米级。生物礁、水道充填体、浅层小断层、溶洞等地质现象在探地雷达剖面上均有特征性反映,且与野外露头对比良好。这为碳酸盐岩露头地质研究提供了新的辅助手段。
Ground penetrating radar (GPR) is a high-resolution electromagnetic method to inspect the shallow subsurface features. Foreign geologists have used GPR in many fields of outcrop geological studies such as 3D reservoir molding, sedimentary facies analysis, high-resolution sequence stratigraphy, 3D fracture imaging, shallow-fault finding, paleokarst study and so on. The Ordovician carbonate outcrops of Bachu Dawuzitage hills in the Tarim Basin are well developed and present abundant geological phenomena including bioherm-beach assemblages, intrusion of igneous rocks, karst features and so on. Ground penetrating radar experimental survey with frequency of 32-500 MHz has been conducted in this area. The results indicated that the penetrating depth can be up to 20 m with the maximum resolution of decimeter. Many geological features, such as reefs, channels in the reef, small-scale faults and karst caves, have typical responses in the high-resolution GPR profiles and can be corresponded well with outcrops. This provides a new associate approach for the outcrop study of carbonate rocks.
出处
《石油实验地质》
CAS
CSCD
2004年第2期212-216,共5页
Petroleum Geology & Experiment
基金
国家"973"项目(G1999043311).
关键词
碳酸盐岩
生物礁
奥陶系
塔里木盆地
露头地质建模
探地雷达
carbonate rock
reef
Ordovician
the Tarim Basin
outcrop geological molding
ground penetrating radar
