海洋地震资料相位控制处理--东海研究实例

Controlled Phase Processing on Marine Seismic Data——A Case Study of East China Sea

陈茂根 郝晓红 赵秀莲 刘苗

CHEN Maogen HAO Xiaohong ZHAO Xiulian LIU Miao

中国石油化工股份有限公司上海海洋油气分公司研究院, 上海 200120

Institute of SINOPEC Shanghai Offshore Oil & Gas Company, Shanghai 200120, China

为了满足定量解释的需要,地震资料处理必须是高分辨率、振幅保持和相位控制的。面向海洋地震资料的相位控制处理技术包括利用远场信号进行确定性零相位化、Q补偿、预测反褶积及剩余相位校正等。利用模拟远场信号求取确定性去气泡及零相位化算子。此文基于相位控制处理,讨论了海洋地震资料的相位和极性判别方法,探讨了大于24 ms算子长度的预测反褶积对于保持信号形状的必要性,介绍了东海三维地震资料相位控制流程。

To meet the requirement for quantitative seismic data interpretation,the seismic data to be processed should be high resolution,preserve relative amplitude and controlled phase.The controlled phase processing techniques on marine seismic data include deterministic zero-phasing with far field signals,Q compensation,predictive deconvolution,residual phase correction and etc.The operator for zero-phasing plus de-bubble is estimated using a modeled far field signals.The identification methods of phase and polarity of marine seismic data are discussed based on the controlled phase processing.A long gap of more than 24 ms for predictive deconvolution is necessary for keeping the shape of the signature.In addition,the controlled phase processing on the seismic data from East China Sea has been discussed in this paper.

https://doi.org/10.3969/j.issn.1008-2336.2014.02.001