| 四川盆地龙泉山含油气构造浅层天然气对隧道工程危害研究 |
| |
| 引用本文： | 苏培东,廖军兆,王奇,文黎.四川盆地龙泉山含油气构造浅层天然气对隧道工程危害研究[J].工程地质学报(英文版),2014,22(6):1287-1293. |
| |
| 作者姓名： | 苏培东 廖军兆 王奇 文黎 |
| |
| 作者单位： | 1.西南石油大学资源与环境学院 成都 610500; |
| |
| 摘 要： | 龙泉山是具备油气生储盖组合的含油气构造,出露侏罗系和白垩系非煤系地层,有7个构造高点,节理裂隙发育,是浅层天然气有利聚集区,沙溪庙组砂岩是浅层天然气主要储层。已建达成铁路炮台山隧道和成-简快速通道龙泉山2#隧道在施工中都出现浅层天然气燃烧和爆炸现象。拟建的成洛大道东延线、成安渝高速公路和成渝客专又将以隧道方式通过龙泉山含油气构造,故研究浅层天然气对隧道危害有重要意义。通过现场8座隧道共20个钻孔天然气浓度测试,发现8座隧道均有浅层天然气显示,天然气最高浓度8.654%,最低浓度0.081%, 8座隧道均受到天然气危害。研究表明,隧道所处构造位置和地层岩性是隧道受浅层天然气危害大小的主要影响因素,隧道离含油气构造高点越近,在穿越裂隙发育的地层时,其钻孔天然气浓度越高,隧道受浅层天然气危害越大。
|
| 关 键 词： | 浅层天然气 隧道 龙泉山 含油气构造 沙溪庙组 四川盆地 |
| 收稿时间： | 2013-11-25 |
HARM TO TUNNEL ENGINEERING DUE TO GAS IN SHALLOW OIL-GAS STRUCTURES AT LONGQUAN MOUNTAINS |
| |
| SU Peidong,LIAO Junzhao,WANG Qi,WEN Li.HARM TO TUNNEL ENGINEERING DUE TO GAS IN SHALLOW OIL-GAS STRUCTURES AT LONGQUAN MOUNTAINS[J].Journal of Engineering Geology,2014,22(6):1287-1293. |
| |
| Authors: | SU Peidong LIAO Junzhao WANG Qi WEN Li |
| |
| Institution: | 1.College of Resources and Environment of Southwest Petroleum University, Chengdu 610500;2.CECEP Construction Engineering Design Institute, Chengdu 610052 |
| |
| Abstract: | The oil and gas structures at Longquan Mountains have the full combination including generation, reservoir and cap rock. The Jurassic and Cretaceous are non-coal strata. There are seven structural heights and jointed fracture zones which are favorable to gather shallow gas. The sandstone of Shaximiao formation is the primary reservoir of the shallow gas. It is so easy to generate engineering accidents when tunneling across the layer. The tunneling would be harmed by enriched shallow gas. There are three lines including the east extension of Cheng-Luo highway, the Cheng-An-Yu expressway and the Cheng-Yu railway. The analyses of gas concentrations that come from twenty drillings of eight tunnels show that the eight tunnels have gas presence. The highest gas concentration is 8.654% and the lowest gas concentration is 0.081%,which reveal that the eight tunnels have been affected by the gas. The present study has found that the main influencing factors of the tunnels are structure location and rock properties. Tunneling would be harmed when it is near the high point of oil and gas structures or passes the fractured formations with high concentration gas. |
| |
| Keywords: | Shallow gas Tunnel Longquan Mountain Oil and gas structures Shaximiao formation Sichuan Basin |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《工程地质学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《工程地质学报(英文版)》下载免费的PDF全文 |
|
