摘要
研究目的:随着川中遂宁与资阳地区隧道工程的不断建设,有害气体问题逐渐突出。为了降低川中遂宁与资阳地区隧道的有害气体风险,本文以川中遂宁与资阳地区构造资料、地层资料、油气地质资料为基础,结合隧道勘探与有害气体测试成果,对川中遂宁与资阳地区地质特征与油气特征进行研究,探讨区内隧道有害气体的致灾机理。研究结论:(1)川中遂宁-资阳地区下伏多套油气储层,油气资源丰富,隧道有害气体来源丰富;(2)研究区有害气体运移模式以节理裂隙连通型为主,层理连通型为辅;(3)研究区背斜宽缓且核部遭受剥蚀,背斜构造储集有害气体较差,有害气体储集空间主要为节理裂隙与砂岩,泥岩为有害气体的盖层;(4)区内有害气体富集能力普遍较差,表现为大部分测试钻孔内有害气体浓度低,有害气体分布随机性强;(5)本研究成果可为四川盆地类似地层与构造区的隧道有害气体勘察与设计提供参考。
Research purposes:With the continuous construction of tunnel projects in Suining and Ziyang areas of central Sichuan,the problem of harmful gases has gradually become prominent.In order to reduce the risk of harmful gases in tunnels in Suining and Ziyang areas of central Sichuan,this paper studies the geological and oil and gas characteristics of the area based on structural data,stratigraphic data,and oil and gas geological data combined with tunnel exploration and harmful gas testing results,and explores the disaster-causing mechanism of harmful gases in tunnels in the region.Research conclusions:(1)The lower multiple oil and gas reservoirs are abundant in the Suining-Ziyang area of Sichuan,and there is a rich source of harmful gases in tunnels.(2)The main mode of harmful gas transportation in the study area is through joint fissures,with stratigraphic continuity as a minor factor.(3)The anticline in the study area is wide and gentle,and its core has been eroded.The structural storage of harmful gases in the anticline is poor,and the storage space for harmful gases is mainly composed of joint fissures and sandstones,while mudstone serves as the cover layer for harmful gases.(4)Harmful gas enrichment is generally poor in the area,characterized by low concentrations of harmful gases in most tested boreholes and strong randomness in the distribution of harmful gases.(5)The research results can provide reference for the investigation and design of harmful gases in tunnels in similar strata and structural areas of the Sichuan Basin.
作者
张营旭
苏培东
陈明浩
李有贵
ZHANG Yingxu;SU Peidong;CHEN Minghao;LI Yougui(China Railway Eryuan Engineering Group Co.Ltd,Chengdu,Sichuan 610031,China;Southwest Petroleum University,Chengdu,Sichuan 610500,China)
出处
《铁道工程学报》
EI
CSCD
北大核心
2023年第6期87-92,共6页
Journal of Railway Engineering Society
基金
中铁二院工程集团有限责任公司科技开发项目(KYY2018016,KYY2019065)。
关键词
川中地区
有害气体
致灾机理
隧道工程减灾
应对措施
central Sichuan
harmful gas
disaster-causing mechanism
tunnel engineering disaster reduction
countermeasures
