兰渝铁路浅层天然气蕴藏区综合选线研究-《高速铁路技术》

文章信息/Info

Title:: Route Selection Study of Lanzhou-Chongqing Railway in Shallow Gas Reservoirs Area

Author(s):: DENG Junqiao; China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China

Keywords:: Lanzhou-Chongqing railway|shallow gas|reservoir area|integrated route selection|principles

摘要:: 兰渝铁路广元至苍溪段位于四川盆地东北边缘，沿线油气田分布较多，是典型的盆地油气蕴藏区。本文以兰渝铁路广元至苍溪段为工程实例，详细剖析了兰渝铁路在浅层天然气蕴藏区域线路方案研究时的控制因素，综合分析线路方案的优缺点，分析总结出在四川盆地浅层天然气蕴藏区域综合选线的原则：（1）应尽量避开构造发育区；（2）应尽量避开沿线油气田；（3）应根据铁路限制坡度，尽可能拔高线路设计高程，降低隧道埋深，选择在非储气层岩层通过；（4）应尽量减少隧道工程，缩短隧道长度。可为类似地区的铁路选线提供指导和参考意见。

Abstract:: Guangyun-Cangxi section of Lanzhou-Chongqing railway is located at the northeast edge of the Sichuan basin which passes a lot of oil and gas fields in the typical basin oil and gas reservoir area. This paper takes the engineering of Guangyun-Cangxi section of Lanzhou-Chongqing railway as an example, analyzes controlling factors in route selection of Lanzhou-Chongqing railway in oil and gas reservoir area, explains the advantages and disadvantages of different route schemes and summaries the following principles of route selections in oil and gas reservoir area of Sichuan Basin:(1) Keep away from structural development zone; (2) Keep away from oil and gas fields along the line; (3) Lift up the design elevation and lower the burial depth of tunnels and go through the non-gas bearing reservoir rock based on the limiting gradient; (4) Try to reduce the tunnel engineering and shorten the tunnel length. These principles can provide guidance and reference to railway projects in similar geological condition.