地震散射波模拟成像方法在铜陵某矿区的应用  

A case study: the numerical simulation and imaging of seismic scattered waves applied to the Tongling ore field

作　　者：尹军杰[1] 王伟[2] 王赟[3] 叶树刚[4] 

机构地区：[1]中联煤层气国家工程研究中心有限责任公司,北京100011 [2]中国科学院青藏高原研究所,北京100085 [3]中国科学院地质与地球物理研究所,北京100029 [4]中国地质大学(北京),北京100083

出　　处：《地球物理学进展》2009年第4期1367-1376,共10页Progress in Geophysics

基　　金：国家自然基金委员会"多分量转换波地震勘探中的面波法静校正研究"(编号:40574055)项目;科技部973"深部煤炭资源赋存规律;开采地质条件与精细探测基础研究"项目课题七"深部煤岩多相地质体的地球物理响应"(2006CB202207);国家重大专项"大型油气田与煤层气开发"(2008ZX05035-001-003;2008ZX05035-003-004;2008ZX05008-006-004)资助

摘　　要：针对深部隐伏的金属矿床,以铜陵某矿区为例,应用散射波正演模拟技术,对金属矿地震数据野外采集中涉及的偏移距、覆盖次数、道间距等参数进行了不同炮记录的模拟对比,辅助指导非均匀地质体金属矿地震勘探野外数据采集的观测系统设计;针对该地区实际采集的地震数据,应用基于等效偏移距的共散射点成像方法,对金属矿地震数据进行了处理,通过与常规反射波法处理结果对比,散射成像效果较好,说明散射波技术在金属矿地震勘探中应用有一定的可行性和适用性.It＇s difficult to explore the hidden metal ore since the depth of the ore deposit is larger than 500 meters, even 1000 meters. It has been a long time since the Tongling ore field was explored and produced, and the target of exploration now is focused on the ore deposit deeper than 1000 meters＇ depth. In this paper, we applied a simulating method of the scattered wave to discuss some key parameters used in field sampling, such as offset, folds, and receiver＇s interval. The modeling records show that simulation of the scattered wave is helpful for the seismic data sampling in the metal ore fields, and guaranteed for a higher signal to noise ratio of the seismic data. Then, we applied the scattered wave imaging, a method based on the Common Scattered Points （CSP） profile with same equivalent offsets, to process the field seismic data. The results show as a better irfiage than the conventional migration profile with method of reflecting wave. So we can see that the technique of scattered wave can be applied to the seismic exploration of metal ore.

关 键 词：隐伏矿 散射波 数据采集 等效偏移距 成像 

分 类 号：P631[天文地球—地质矿产勘探]