小尺度铜矿脉反射地震勘探成像的数字模拟试验  

Digital Simulation Test of Reflection Seismic Exploration Imaging of Small-scale Copper Veins

作　　者：晏红艳 丘斌煌 刘伟祖[3] 玉琨 Yan Hongyan;Qiu Binhuang;Liu Weizhu;Yu Kun(Geophysical-COSL Data Processing Co.,Zhanjiang Guangdong 524057,China;College of Geophysics,Chengdu University of Technology,Chengdu Sichuan 610059,China;School of Petroleum and Natural Gas Engineering,Southwest Petroleum Univ- ersity,Chengdu Sichuan 610500,China)

机构地区：[1]中海油田服务股份有限公司物探事业部特普公司,广东湛江524057 [2]西南石油大学石油与天然气工程学院,四川成都610500 [3]成都理工大学地球物理学院,四川成都610059

出　　处：《工程地球物理学报》2019年第2期144-150,共7页Chinese Journal of Engineering Geophysics

基　　金：国家自然科学基金项目(编号:41774059);中海油田服务股份有限公司科技项目(编号:WTB2018YF020)

摘　　要：针对一个小尺度铜矿脉进行反射地震勘探的可行性问题,进行了一项波动方程正演模拟数值试验。首先根据已知的地质资料建立了地震参数模型,用波动方程正演模拟技术按照地震勘探观测系统的施工方式,滚动放炮合成了38炮地震数据,然后按照生产资料处理流程对这些数据进行处理,最后得到了地震数据叠加剖面以及偏移剖面等图像成果。试验结果表明,如果采用较高频率的震源信号,反射勘探地震成像方法可以有效地揭示不整合面下的小尺度铜矿脉空间展布形态。A numerical experiment using seismic wave equation forward modeling was carried out to test the feasibility of reflection seismic exploration for small-scale copper veins. Using the available geological information, a seismic parameter model was built. Seismic wave equation forward modeling was then performed according to the approach of construction work from the seismic exploration and observation system. In total 38 shot gathers of seismic data were synthesized. Then data processing yielded a CDP stack profile and a migration profile. The experiment results show that the reflection seismic exploration would effectively reveal the small scale copper veins if we use the high frequency source signals.

关 键 词：铜矿脉 地震成像 正演模拟 数据处理 

分 类 号：P631.4[天文地球—地质矿产勘探]