任意广角方程逆时偏移及其在煤田资料中的应用  

Reverse-time Migration of Arbitrarily Wide-angle Wave Equations and Its Application in the Coal Field Seismic Data

作　　者：鲁统祥[1] 何兵寿[1] 沈骥千[2] 

机构地区：[1]中国海洋大学海底科学与探测技术教育部重点实验室,山东青岛266100 [2]江苏煤炭地质物测队,江苏南京210000

出　　处：《山东科技大学学报（自然科学版）》2013年第1期18-25,共8页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：国家自然科学基金重点项目(40839901);国家自然科学基金项目(41174087;40804021);国家油气重大专项项目(2011ZX05005-005-010);天然气水合物资源勘查与试采工程("127"工程)(GZH201100307-02-01)

摘　　要：利用任意广角方程逆时延拓的高阶有限差分格式实现了纵波资料的叠前逆时深度偏移,给出了稳定性条件及吸收边界条件;采用归一化互相关成像条件,在成像条件的计算中摒弃双程波方程,采用单程波方程对检波点逆时延拓波场和炮点正向延拓波场进行计算,得出了最佳归一化互相关成像条件。该算法在煤田资料偏移处理中,对较深处的构造清晰成像,取得了较好的应用效果。Based on the arbitrarily wide-angle wave equations, a reverse-time propagation scheme was applied in the prestack resverse-time depth migration, the stability conditions and the absorbing boundary ones of the equations were also given. With the double wave equation abandoned in the imaging conditions, an optimal normalization imaging conditon was concluded by using the single wave equation to calculate the reverse time wave field and the forward wave field. The method has obtained distinct imaging and good results in the migration of the coal field data.

关 键 词：任意广角方程 逆时偏移 成像条件 

分 类 号：P631.41[天文地球—地质矿产勘探]