基于三维模型数据的Kirchhoff叠前时间偏移保幅性分析  

Analysis of the amplitude preservation of Kirchhoff prestack time migration method based on 3D model data

作　　者：周东红 张志军 

机构地区：[1]中海石油(中国)有限公司天津分公司渤海石油研究院,塘沽300452

出　　处：《地球物理学进展》2016年第5期2292-2298,共7页Progress in Geophysics

基　　金：中海石油(中国)有限公司重点科技攻关项目(ZHKY-2013-TJ-01)资助

摘　　要：随着勘探对象的复杂程度不断增加,地震数据处理对偏移成像技术的要求逐渐从以构造成像为主发展到以岩性参数估计为主.Kirchhoff叠前时间偏移提供的成像道集保幅性评价对于后续的AVO分析和储层预测至关重要.本文以渤海海域渤中28构造区地质结构为基础建立数值模型开展三维波动方程正演模拟,基于三维模型数据研究了偏移速度精度及偏移孔径对Kirchhoff叠前时间偏移保幅性的影响,研究成果对实际资料的处理有一定的指导意义.With the increasing complexity of the exploration targets, the requirements of seismic data processing on the migration imaging are gradually changing from structural imaging to lithology parameter estimation. Amplitude preserved estimation of the imaging gathers provided by Kirchhoff prestack time migration plays an important role in the following AVO analysis and reservoir prediction. In this paper, based on the geological structure of Bozhong 28 structure region in Bohai Sea, a numerical model is build and the 3D wave equation forward modeling is operated. Based on the 3D model data, the effects to amplitude preservation of Kirehhoff prestack time migration that caused by migration velocity precision and migration aperture are studied. The research results have a certain guiding significance for the real data processing.

关 键 词：地震数据保幅性处理 KIRCHHOFF叠前时间偏移 偏移速度 偏移孔径 

分 类 号：P631[天文地球—地质矿产勘探]