地质雷达在岩溶塌陷区油气管道选线中的应用

Application of geological radar to oil and gas pipeline route selection in karst collapse areas

在岩溶地区进行输油气管道工程建设时,岩溶塌陷会对管道造成破坏,必须探明溶洞的发育情况以保证管道安全通过。地质雷达是一种新型的物探方法,具有工作效率高、分辨率高、异常图像直观等优点。以中缅油气管道广西段沙江坳溶洞勘察为例,介绍了地质雷达在岩溶区管道选线中的应用:首先使用全站仪实地测量探测区域地形图,然后对探测区域进行场地清理,布设测线,最后使用地质雷达进行探测,根据探测结果微调管道线路,避免管道因岩溶塌陷造成损害,同时对管道在岩溶塌陷区的选线工作提出建议。工程应用结果表明:地质雷达在油气管道浅层岩溶塌陷探测中具有一定的有效性和经济合理性。

When oil and gas pipelines are constructed in karst areas, they may be damaged by karst collapse. To ensure the safe running of pipelines through caverns, therefore, it is necessary to explore clearly the development situations of the caverns. The geological radar is a new geophysical prospecting method with the advantages of high efficiency, high resolution and visual abnormal image. In this paper, the prospecting on Shajiang＇ao cavern in Guangxi section of China- Myanmar oil and gas pipeline was taken as an example to introduce the application of geological radar to pipeline route selection in karst areas. Firstly, the topographic map of the detection region is measured by means of total station instrument. Then, the detection region is cleaned up and survey lines are laid. Finally, detection is carried out using the geological radar. Afterwards, the pipeline route is tuned according to the detection results to prevent the pipeline damage by karst collapse. Besides, the suggestions on the pipeline route selection in karst collapse areas were proposed. The engineering application results indicate that the geological radar has a certain effectiveness and economic rationality in the detecting shallow karst collapse of oil and gas pipeline. （2 Figures, 20 References）