摘要
本文较详细地介绍了以色列PARADIGM地球物理公司的叠前深度偏移处理软件GeoDepth的原理以及在莺歌海盆地LD22－1构造的应用，该软件采用层速度相干反演与层析成像技术相结合，并进行多次迭代来获取最佳速度模型。LD22－1构造由于气层低速和强反射屏蔽的影响，构造形态在时间剖面上变形，反射同相轴的信噪比和频率大幅度降低，通过叠前深度偏移处理，消除了速度陷井的影响，恢复了构造形态，提高了信噪比，为重新认识该构造提供了有力的依据。
This paper in detail introduces the theory of pre-stact depth migration processing software GeoDepth from PARADIGM geophysical Ltd, Israel and the application in LD22-1 anticline of Yinggehai basin. The software uses interval velocity coherency inversion and tomography technique as well as iteration to set the best velocity model. In LD22-1 anticline, the effects of low velocity gas layers and the strong reflection shields cause distortion of the structural form in time section and desreasing of S/N ratio, frenquency of reflection events. Pre-stack depth migration processing in this area removed the effects of velocity trap and restored the true structure and increased the S/N ratio. It provides a strong evidence to reunderstand the anticline.
出处
《中国海上油气（地质）》
1996年第4期253-260,共8页
China Offshore Oil and Gas(Geology)
