论文详情

海上地震数据全波形反演实际应用

石油物探

2017年 56卷第No. 1期

阅读：90

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Title

The strategies of FWI realization for marine seismic data

单位

(1.中海油研究总院,北京100028;2.中国石油大学(北京),北京102249)

Organization

(1.CNOOC Research Institute,Beijing 100028,China;2.China University of Petroleum,Beijing 102249,China)

摘要

全波形反演技术(FWI)在实际地震数据应用时由于以下原因很难取得理想的结果。一是因为初始模型不准确、子波未知、噪声干扰等导致模拟数据与实际数据匹配难;二是因为FWI计算量大。将FWI应用于实际海上地震数据,给出了海上地震数据处理流程,并基于FWI实际应用中存在的问题给出了一些解决办法:利用海底反射估计近源子波解决震源子波估计问题;采用L_BFGS算法计算梯度加速策略解决FWI海量计算问题等。海上实际地震数据处理的成功应用,证明了本文策略的有效性。

Abstract

A ideal FWI result is so difficult to obtain in processing the field data.It is mainly due to the disaccord between the field data and the modeling data which is caused by that the initial model is not accurate enough,the wavelet is unknown and the data are noisy.It is also due to the high cost of FWI.FWI is put into practice in marine data.A workflow and some strategies of FWI realization for marine seismic data such as the estimation of the near-source wavelet based on the sea bottom reflection and the acceleration method for massive FWI computing like the L_BFGS method are also proposed.The FWI practice in marine data proves the capacity and validity of our proposed strategies.

关键词：

全波形反演; 海上地震数据; 震源编码; 边界存储;

Keywords:

FWI,; marine seismic data,; coding of super shot gather,; boundaries storage;

基金项目

中海石油有限公司综合科研项目(YXKY-2015-ZY-02)资助。

DOI

10.3969/j.issn.1000-1441.2017.01.009