低频可控震源在哈拉湖冻土区二维地震勘探试验研究  

Low-frequency vibroseis experimental study of 2D seismic exploration for Hala lake's permafrost region

作　　者：陈鹏 于常青[2] 韩建光 李录明[3] 王琪 CHEN Peng;YU Chang-qing;HAN Jian-guang;LI Lu-ming;WANG Qi(Sinomine Resource Exploration Company Limited, Beijing 100089, China;Institute of Geology, Chinese Academy of Geological Sciences, Beifing 100037, China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu City, Chengdu 610059, China;Tuha Division, BGP Inc. , CNPC, Xinjiang Hami 839009, China)

机构地区：[1]中矿资源勘探股份有限公司,北京100089 [2]中国地质科学院地质研究所,北京100037 [3]成都理工大学油气藏地质及开发工程国家重点实验室,成都610059 [4]中国石油东方地球物理公司吐哈物探处,新疆哈密839009

出　　处：《地球物理学进展》2018年第2期562-570,共9页Progress in Geophysics

基　　金：国家自然科学基金项目(41374128)资助

摘　　要：高原冻土区由于地质条件复杂,对地震波能量尤其是高频信号吸收作用强,一直是地震勘探的一个难点.为探测哈拉湖冻土区的深部结构,分析可能的天然气水合物的分布情况及地球物理响应特征,我们在研究区采用低频可控震源激发进行了高精度二维地震勘探试验.本文通过对原始单炮定性分析以及针对能量分析、频段相对能量比估算、道集间频率分析方面进行定量分析,来确定振动台数、扫描频率、扫描长度、驱动幅度以及覆盖次数等优选参数.文章总结了可控震源在高原冻土区的野外施工方法,对以后类似地区的地震勘探工作有一定的借鉴意义.Due to complicated geological conditions,and it have strong absorption for seismic wave energy, especially the high frequency signals,plateau permafrost regions has always been a difficulty of seismic exploration. We conducted a high-precision 2 D geological exploration experiment, which was excited by lowfrequency vibroseis,to detect the deep structure in the Hala lake permafrost region and analyze the natural gas hydrate distribution as well as geophysical response features. The article identifies the optimized parameter of vibroseis units numbers,scanning frequency and length, driven amplitude and coverage number by the qualitative original single shot analysis and quantitative analysis of energy,frequency band relative energy ratio estimation,inter set frequency. This paper summarizes the field construction method of vibroseis in plateau permafrost region,which contributes to seismic explorations in analogous areas.

关 键 词：可控震源 冻土区 天然气水合物 激发参数 覆盖次数 

分 类 号：P631[天文地球—地质矿产勘探]