摘要
针对三维VSP目的层成像问题,在反射点计算、道集抽取、动校正和叠加等处理方法上进行了研究和总结。采用等效连续速度模型折射线算法计算反射点位置,以反射点面元抽出共反射点道集,然后进行动校正。这里采用扫描的办法计算出正确的双程垂直旅行时,再进行变叠加次数的叠加处理,得到叠加剖面。最后对射线追踪方法得到的斜井三维VSP理论记录进行了处理,验证了方法的正确性。
Aimed at the 3D-VSP imaging of target formations, this article has conducted research and summary in the point of reflection spot computation、gather sorting、NMO correction and stack. The author calculated the position of reflection spot by means of the equivalent continual velocity model curved ray algorithm, obtains common-reflection point-gather on binning, then carries on NMO correction,the author used the method of scanning to calculate the correct two-way vertical travel time, and stacks with changed fold number, then obtains the superimposed profile. Finally the author processed the deviated 3D-VSP theory record which was obtained by ray tracing scheme, and proved the validity of this method.
出处
《物探化探计算技术》
CAS
CSCD
2010年第2期132-137,107-108,共6页
Computing Techniques For Geophysical and Geochemical Exploration
基金
国家重大专项资助(2008ZX05024-01)
