有偏VSP-AVO反演理论研究

A research on the offset VSP-AVO inversion theory

1. 大庆石油学院, 安达 151400;2. 中国地质大学, 北京 100083

Daqing Petroleum Institute, Anda 151400

考虑到困扰地面地震AVO反演中保持振幅处理和不甚了解子波特性的情况, 本文针对井中有偏VSP数据, 提出了“有偏VSP－AVO反演理论”, 给出了有偏VSP－AVO反演的原理与实现方法, 并就有偏VSP－AVO反演的应用进行了某些理论上的探讨, 进一步对多偏移距VSP观测提出了VSPCDP道集的概念和VSPCDP－AVO反演。同时, 还就有偏VSP资料的AVO预处理方法进行了探讨。

Considering the difficulty in amplitude-preserving processing and inadequate information about wavelet characteristics, We present a theory called offeet VSP-AVO inversion for the borehole offset VSP data in this paper. The methodology of the theory and some theoretical discussion of its application are given. As for multioffset VSP layout, the paper introduces the concept of VSP CDP gathers and the VSP CDP-AVO inversion.In addition, a discussion on the AVO preprocessing for offset VSP data is also made.