特长油气田区高瓦斯隧道地质构造与瓦斯精准探测方法研究-《高速铁路技术》

文章信息/Info

Title:: Research on Geological Structure and Exact Gas Exploring Method of High Gas Tunnel in Extra-long Oil and Gas Field

作者:: 姚海波; 高峰; 张文选; 孟庆明; 罗世刚; 1. 北方工业大学, 北京 100088;
2. 中国水利水电第七工程局有限公司第一分局, 四川眉山 620860;
3. 中国电建集团铁路建设有限公司成都公司, 成都 610017

Author(s):: YAO Haibo; GAO Feng; ZHANG Wenxuan; MENG Qingming; LUO Shigang; 1. North China University of Technology, Beijing 100144, China;
2. Branch NO.1 of Sinohydro 7 Co., Ltd., Meishan 620860, China;
3. Chengdu Branch of PowerChina Railway Construction Co., Ltd., Chengdu 610017, China

Keywords:: oil and gas field|high gas tunnel|geological disaster|precise prediction

摘要:: 本文依托成都某特长油气田区高瓦斯隧道，通过对区域沉积建造与构造演化的分析和对隧址区油气成生、运移与储集机制的研究，查明隧道瓦斯灾害孕灾机制。根据其特点，利用地貌构造高分辨率影像解译技术识别微地貌构造格架与力学机制，利用EH4探查构造深部发育与含水情况。根据瓦斯储集地质构造条件，将全线隧道围岩进行瓦斯风险分级分区，为地质构造精确探测与瓦斯防治奠定坚实的基础。在施工过程中，利用TSP方法实现对构造带的米级误差识别。掌子面开挖前，借助3孔超前水平钻探，探查并精确计算构造面隧道中心里程与首次揭露里程。通过以上一系列由宏观到微观层次递进的工作方法，最终实现了地质构造与瓦斯亚米级误差的精准探测。

Abstract:: Based on analysis of regional sedimentary construction and structural evolution, and study of the mechanism of formation, migration and storage of oil and gas in the tunnel site, this paper finds out the mechanism of tunnel gas disaster. According to its characteristics, high-resolution image interpretation technology of geomorphic structure is used to identify the micro-geomorphic tectonic framework and mechanical mechanism, and EH4 method is used to probe the deep development and water containing of the structure. According to the geological structure conditions of gas storage area, the risk of gas in the tunnel surrounding rock in the whole line is classified and zoned, which lay a solid foundation for geological structure precise exploration and gas prevention. During construction, TSP method is used to realize the meter level error identification of structural belt. Before excavation of the working face, 3-hole advanced horizontal drilling is used to probe and accurately calculate the center mileage and the first exposed mileage of the tunnel on the structural face. By means of the above series of work methods from macro level to micro level, the exploring error of geological structure and gas is controlled accurately within 1 meter.