岩性油气藏 ›› 2012, Vol. 24 ›› Issue (5): 1–11.doi: 10.3969/j.issn.1673-8926.2012.05.001

• 学科前缘 •    下一篇

各种速度分析与反演方法的对比研究

王华忠,冯波,李辉,王雄文,胡江涛   

  1. 同济大学海洋与地球科学学院波现象与反演成像研究组,上海200092
  • 出版日期:2012-10-20 发布日期:2012-10-20
  • 作者简介:王华忠(1964-),男,教授,博士生导师,主要从事地震波传播、偏移成像与反演、近地表与中深层速度分析(反演)和速度模型建立、地震数据规则化处理等方面的研究工作。地址:(200092)上海市四平路1239 号同济大学海洋楼405 室。E-mail:herbhuak@vip.163.com
  • 基金资助:

    国家科技重大专项“山前带地震高精度成像技术研究”(编号:2011ZX05005-005-008HZ)和国家重点基础研究发展规划“973”项 目“基于散射点道集的全波形速度反演与成像”(编号:2011CB202402)联合资助。

Comparison among velocity analysis and inversion methods

WANG Huazhong,FENG Bo,LI Hui,WANG Xiongwen,HU Jiangtao   

  1. School of Ocean and Earth Science, Tongji University, Shanghai 200092, China
  • Online:2012-10-20 Published:2012-10-20

摘要:

速度估计与建模是勘探地震学的核心技术。速度估计问题是一个标准的反演问题。原则上,反演问 题应该在贝叶斯框架下进行,但是石油工业界根据生产实际形成了一套速度分析与建模的技术系列。针 对目前速度估计与速度建模技术研究及应用现状,试图把各种速度估计方法都纳入贝叶斯估计框架下进 行审视。该框架的基本逻辑是建立2 种目标泛函:成像空间中的相关最佳泛函(或聚焦最佳泛函)和数据 空间中的逼近误差的方差最小泛函。在此目标泛函的基础上,利用梯度导引类的优化算法或Monte Carlo 类的全局寻优算法,甚至扫描(枚举)算法实现各种尺度下的速度估计及模型建立。在上述理论框架下,系 统地分析目前典型方法技术的共同特征,可以指出新的速度估计方法的发展方向。

关键词: 高分辨率层序地层学, 地层对比, 九佛堂组, 沙海组, 胡力海洼陷

Abstract:

Velocity es timation and modeling technique is a key issue in exploration seismic. As a typical inversion problem, velocity estimation should be carried out under the framework of Bayesian estimation. However, a series of techniques for velocity analysis and modeling are developed by the petroleumindustry. In viewof the present situation of research and application of velocity estimation and modeling technique, we try to analyze the current velocity estimation methods under the framework of Bayesian estimation. All the existing velocity estimation methods can be incorporated into the following two objective functions: the best correlation criterion (the best focusing criterion) in the image-domain or the least error criterion in the data-domain. The gradient-guided local optimization method and Monte Claro method can be used to estimate the seismic velocity in different scales. Under this framework, we can analyze the common features of all the currentmethods, and develop new methods and techniques for velocity estimation.

Key words: high resolution sequence stratigraphy, stratigraphic correlation, Jiufotang Formation, Shahai Formation, Hulihai Subsag

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