双方位地震资料处理技术及在M区块的应用  

Dual Azimuth Seismic Processing Technology and Its Application to M Block

作　　者：谢涛 邱铁成 Xie Tao;Qiu Tiecheng(Geophysical Research Institute,China Oilfield Services Limited,Tianjin 300451,China)

机构地区：[1]中海油服物探事业部

出　　处：《工程地球物理学报》2019年第3期329-333,共5页Chinese Journal of Engineering Geophysics

摘　　要：海上地震勘探多采用多船进行宽方位采集,但限于采集成本,宽方位采集在中国近海勘探普及程度不高。因此讨论了一种区别于传统宽方位采集的案例。它不需要针对性地进行宽方位采集,仅通过融合两个跨年度的不同采集方位的地震数据,就可获得相对宽方位地震资料,且采集成本较低。首先讨论了该类型双方位地震数据处理的难点,如匹配问题,多次波压制问题,方位各向异性问题,然后提出了相对应解决方案。M区块的应用表明,不同年度采集的双方位地震资料可以获得优于单方位的成像结果,能有效提高复杂构造、低信噪比区的成像质量。Multi-ships are used for wide-azimuth acquisition on sea, but limited to acquisition costs. Wide-azimuth acquisition is not popular in China. This paper discusses a case that distinguishes it from traditional wide-azimuth acquisition. It does not require targeted acquisition, and only obtains relatively wide-azimuth seismic data by merging seismic data of two different acquisition orientations across the year with low acquisition cost. The difficulties in the processing of seismic data of this type are discussed, such as matching problem, multiple wave suppression problem, azimuthal anisotropy problem, and corresponding solutions are proposed. The application of M block shows that the seismic data acquired in different years can obtain better imaging results than single orientation, which can effectively improve the imaging quality of complex structures and low SNR regions.

关 键 词：双方位 方位各向异性 成像 

分 类 号：P631.4[天文地球—地质矿产勘探]