多源地震资料重叠炮信息消除方法研究

Elimination of duplicate shots information of multisources seismic data

中国石油化工股份有限公司石油物探技术研究院,江苏南京211103

Wu Dali, Sinopec Geophysical Research Institute,Nanjing 211103,China

多源地震资料涉及地震波场分离和干扰波的去除处理,针对要解决的重叠炮记录去除技术难点,利用噪声在不同域中表现形式不同的客观规律,根据观测系统的具体情况将炮集处理域转换成共炮检距域或仪器通道号域,使记录中的重叠炮相干噪声转化为随机噪声,采用FX反褶积等噪声去除技术来去除随机噪声,实现去除重叠炮干扰。应用该处理技术对数值模拟资料和实际资料中的含重叠炮记录进行了波场净化处理,取得了较好的波场净化效果。该技术可应用于可控震源密集激发资料中的重叠炮记录的处理,也可应用于其它震源激发记录中的重叠炮、机械干扰等的处理。

Multisources seismic data involves in the separation of seismic wavefield and the removal of interference wave.For the technical difficulties of duplicate shot records eliminating,in terms of the different forms of noise in different domains,we convert the multisources seismic data from shot domain to common offset domain and then the duplicate shots noise is converted to random noise according to the details of the geometry,followed by using noise removal techniques such as FX deconvolution to remove random noise and thus duplicate shots information is eliminated.This wavefield purification process technique is applied in model data and real data contained the duplicate shots records with a remarkable result.The technique can be applied not only for processing duplicate shot records of the vibroseis intensive shooting seismic data,but also for eliminating duplicate shots and mechanical disturbance in seismic records by other source shooting.

10.3969/j.issn.10001441.2013.05.011