摘要
研究了三维转换波资料坐标旋转、面元划分及三维共转换点计算方法,即将每一个转换波共炮点道集内所有地震道进行坐标旋转,旋转后的转换波道集在炮检距、纵横波速度已知的条件下,用迭代方法计算三维转换点的平面坐标,并绘制在平面上。将平面分割为小的面元,凡是转换点在同一面元内的记录道都属于同一共反射点转换波道集,转换点面元大小与纵横波速度比有关。在上述研究的基础上,建立了宽线三维转换波资料处理流程,处理了某油田某地区的宽线转换波资料。
We have researched a method of coordinate rotation of 3D converted wave data, binning and calculating 3D converted point, that is to make coordinate rotation for all seismic traces in each gather of converted wave common-shot point. In the condition of knowing offset and velocities of compression wave and shear wave, we have calculated the plane coordinate of 3D converted point through a stacking method and drawn it on a plane, then divided the plane into some small bins. All traces that converted-points are at a same bin should belong to a same common-reflection point gather and the size of converted-point bin is relative with the ratio of compression and shear velocity. Basing on above surveying, we have set up a processing flow of 3D wide line converted wave data and have processed wide line converted wave data of some area in some oil field. Finally we have obtained perfect results.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2005年第1期109-112,共4页
Journal of Jilin University：Earth Science Edition
关键词
坐标旋转
面元划分
三维转换点
coordinate rotation
binning
3D converted-point
