CRS叠加的研究现状及发展趋势  

Review of common reflection surface stack and its development prospect

作　　者：孙小东[1] 李振春[1] 滕厚华[1] 

机构地区：[1]中国石油大学(华东)地球资源与信息学院,山东东营257061

出　　处：《勘探地球物理进展》2007年第4期245-251,共7页Progress in Exploration Geophysics

摘　　要：在常规处理中,复杂地质条件下的时间域成像和叠后偏移的效果不是很理想。为此,提出了一些新的时间域成像技术和叠前偏移方法,CRS(common reflection surface,共反射面元)叠加便是其中的一种。CRS叠加是一种可以直接由多次覆盖反射数据得到零炮检距(ZO)剖面而不依赖于速度信息的叠加方法。二维和三维CRS叠加不仅能够改进模拟ZO剖面,提高深层的信噪比,而且给出了可用于反演速度场的多参数剖面。模型数据的试算和实际资料的处理验证了方法的有效性和实用性。基于起伏地表的CRS叠加不需要先对原始数据做静校正,而且得到叠加结果后可以很容易地实现基准面重建。另外,利用CRS得出的出射角及波前曲率信息可以更好地实现偏移速度建模,这也是今后CRS研究的一个重点。Imaging in time domain and post-stack migration are not applicable in region with complex structure by traditional process. New methods of imaging in time domain and pre-stack migration appear, among which is CRS stack. CRS stack is such a method that it can get ZO section from original seismic data directly and do not depend on velocity model. 2-D and 3-D CRS stack not only improve the ZO section quality and deep S/N ratio but also offer kinematic parameter sections. Tests on model data and real seismic data prove the effectiveness of this method. It is no need for CRS stack that starts from rugged topography to do static correction and data redatuming can be easily realized. In addition, CRS parameters can be used in velocity modeling, which is an aspect of CRS research in future.

关 键 词：CRS叠加 基准面重建 波场参数 速度建模 

分 类 号：P631.4[天文地球—地质矿产勘探]