波动方程垂向插值斜缆采集正演模拟  

Forward modeling of marine variable-depth streamer seismic data based on wave-equation and vertical interpolation

作　　者：张振波 刘铮 罗伟 

机构地区：[1]中海石油(中国)有限公司深圳分公司,深圳518054

出　　处：《物探化探计算技术》2017年第6期783-790,共8页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家科技重大专项课题(2011ZX05023-003);中海石油(中国)有限公司科技项目(YXKY20135Z02)

摘　　要：为了解决海洋斜缆地震数据正演模拟时大多数检波器不在网格点上,不能直接记录波场值的问题,在使用有限差分法求解波动方程时,增加了垂向插值计算,得到了实际检波点的波场值。通过建立精细模型对正演模拟结果进行了误差分析,验证了该垂向插值方法的可靠性。分析对比了正演模拟数据和实际生产数据的波场特征,进一步证明了该波动方程与垂向插值正演模拟方法的正确性。该方法在倾斜电缆地震采集参数设计方面,具有较高的实用价值。In the forward model of the variable depth streamer acquisition data, a large number of receivers are not on grids,so that wavefield cannot be recorded directly. In order to slove the problem,we get the receiver＇s wavefield by vertically tiiterpolating the wave field when sloving the wave -equation. By building a retined modll and analysing the error that caused by this forward modeling,this method is proved to be feasibility. Furthermore,by comparing the wavefidata with the field seismic data,it is proved that the method of forward modll of marine variabie -depth streamer seismic databased on wave -equation and vertical interpolation is validity. This method is practical for variabvaluation design.

关 键 词：斜缆 陷波点 波动方程正演模拟 垂向插值 

分 类 号：P631.4[天文地球—地质矿产勘探]