基于运动学波场属性的改进共反射面元叠加  

The Improved Common Reflection Surface Stack Based on Kinematic Wavefield Attribute

作　　者：李栋 王立歆 徐兆涛 孙小东[2] 

机构地区：[1]中石化石油物探技术研究院,江苏南京211103 [2]中国石油大学(华东)地球科学与技术学院,山东青岛266580

出　　处：《石油天然气学报》2014年第10期74-77,86,共5页Journal of Oil and Gas Technology

基　　金：国家"973"计划项目(2011CB202402)

摘　　要：共反射面元叠加算子考虑了地下反射层的局部地质特征,处理时将目标反射点邻域内所有反射点信息进行校正和叠加,可以获得高质量的零偏移距剖面。在叠加过程中得到反映地下信息的运动学波场属性剖面,基于属性参数计算得到深度成像点在时间域对应的投影第一菲涅尔带的范围,将其作为改进的叠加孔径,可有效地提高叠加剖面的振幅和横向分辨率。模型试算和实际资料的处理表明,与传统的共反射面元叠加剖面相比,改进的叠加剖面有着更高的信噪比和同相轴连续性。The common reflection surface stacking operator took account of the local geological characteristics of subsurface reflector and the information of all the reflection points on the surface near the target point were corrected and stacked during the processing procedure,thereby the zero-offset sections with high quality could be obtained.The kinematic wavefield attributes reflecting the subsurface information could be obtained in the process of stacking.The projected first Fresnel zone in the time domain corresponding to the reflector segment in the depth domain could be obtained based on the attribute parameters,which could be used as the improved stacking aperture to enhance the amplitude and lateral resolution of stacking sections.The model data test and actual seismic data processing reveals that compared with the image section by conventional CRS stack,the image section by CRS stack based on improved aperture is much better in the aspect of signal-to-noise ratio and the continuity of reflection event.

关 键 词：共反射面元 零炮检距剖面 运动学波场属性 改进叠加孔径 

分 类 号：P631.44[天文地球—地质矿产勘探]