自动拾取叠加速度及提取偏移速度方法

Methodology of automatic picking stack velocity and extracting migration velocity

江汉石油管理局物探处计算中心,潜江 4331OO

Geophysical Prospecting Division, Jianghan Petroleum Administration, qianjiang 433100

本方法力求自动拾取叠加速度, 用局部叠加技术降低动校叠加次数, 针对速度扫描时反复动校叠加采用相应的快速动校和扫描间隔控制等技术以最大限度地减少计算量；采用层位追踪和迭代处理来提高速度的有效性和准确性；在叠加层位上计算并输出控制点的叠加速度和偏移速度。

A method of stacking velocity automatic picking is presented here. It uses a local stackingtechnique to decrease the stacking number. In view of the problem of repeated NMO stacking in velocityscanning fast NMO correction and seanning interval control arld other techniques are adopted so as toraluce the computational amount to a minimum. Horizan tracking and iterative processing are employedto improve the accuracy of velocity. The stacking velocity and migration velocity in control points arecalculated and output on the stack horizon.