三维地震共反射面元不对称抽道集叠加方法的构想  

Conceiving of 3D Seismic Common-Reflection Surface Element Asymmetric Trace Gather Sorting Stacking

作　　者：邱苏[1] 徐永清[2] 胡旭芝[3] 陈迪[1] 

机构地区：[1]江苏煤炭地质物探测量队,江苏南京210046 [2]中国矿业大学,江苏徐州210008 [3]南京大学,江苏南京210091

出　　处：《中国煤炭地质》2007年第3期53-55,共3页Coal Geology of China

摘　　要：针对自由观测面、自由反射界面的一般情况,提出了三维地震共反射面元不对称抽道集的叠加方法,即"鳞片法"。首先建立反射界面的空间属性,并根据解释精度和反射界面起伏变化程度,选取适当的网度,将反射界面通过若干个不规则的几何小平面(鳞片)表现出来,然后求出每一炮检点的真实反射点以及满足每一小反射面元的不对称道集的相应炮检点,在此基础上进行动校正,动校后的同一道集信息,符合自激自收形式,可直接进行叠加,不需再做偏移处理。Based on generic free observation surface and free reflecting boundary,put forward 3D seismic common-reflection surface element asymmetric trace gather sorting stacking or known as 'scale method'.Firstly establish reflecting boundary space attribute,select suitable grid spacing according to interpretation accuracy and reflecting boundary undulating,find expression from numbers of irregular geometrical facets(scales).Then find out true reflecting point of every shot-detector point to satisfy every facet asymmetric trace gather corresponding shot-detector point and carry out dynamic correction.The same trace gather information after dynamic correction accord with zero offset information form,can carry out stack directly,need not any migration process.

关 键 词：三维地震 自由观测面 自由反射面 不对称抽道集 叠加 

分 类 号：P631.42[天文地球—地质矿产勘探]