GeoEast系统积分法叠前时间偏移技术  

GeoEast system integral prestack time migration technology

作　　者：王狮虎 罗国安 寇芹 田振平 张丽梅 聂红梅 

机构地区：[1]中国石油东方地球物理公司物探技术研究中心

出　　处：《石油工业计算机应用》2016年第3期20-25,3,共6页Computer Applications Of Petroleum

摘　　要：和叠前深度偏移相比,叠前时间偏移计算成本低,速度模型易于求取,是时间域最精确的成像方法,现在已经成为地震资料处理流程关键环节。随着油气勘探程度的不断深入,石油勘探行业面临的探区更加复杂。地表剧烈变化的山地、检波点置于海底的深海勘探等已经成为地震勘探探索的对象,高密度全方位技术的应用使地震数据总量急速向海量化发展,这些新问题对叠前时间偏移在计算性能和地球物理功能两方面带来更高的要求。本文从软件性能和地球物理功能两方面介绍GeoEast地震资料处理解释一体化系统在叠前时间偏移技术的研究历程。详述三种典型的叠前时间偏移并行算法,证明共炮检距^(【1】)最先进的叠前时间偏移方法,最后介绍了两类典型的地球物理功能,用大量的测试数据和实际应用结果证明GeoEast系统叠前时间偏移是功能最为齐全、计算效率最高商业化软件。Compared with the prestack depth migration,prestack time migration has low computing cost and velocity model is easy to obtain,it is the most accurate imaging method in time domain and has become the key step of seismic data processing flow.With the deepening of the degree of oil and gas exploration,oil exploration industry face increasingly complex exploration area.It has become the object of seismic exploration that drastic changes of the surface of the mountain and deep sea exploration its detectors islie on the bottom of the sea,the application of high density and wide azimuth technology makes the seismic data volume increase rapidly.in the two aspects of computing performance and geophysical functionprestack time migration face higher requirements.fromthat two aspects the development history of GeoEastprestack time migration is introduced in this paper.It is proved that the common offset parallel algorithms is the most advanced prestack time migration method among three typical prestack time migration parallel algorithms,two kinds of typical geophysical functions is introduced in the end of this paper,the large application results actual data show that theprestack time migration inGeoEast system hasmost complete function and has the highest computational efficiency among all same kind commercial software.

关 键 词：叠前时间偏移 输入道并行算法 输出道并行算法 共炮检距并行算法 OVT OBS 

分 类 号：P631.4[天文地球—地质矿产勘探]