Research on Statistics and Modeling Approaches of Three-Dimensional Surface Velocity with Micro Logging Data
详细信息
- 责任者：Ye Yong (Geophysical Research Institute ; SINOPEC ; Nanjing 210014 ; China) ; Sun Kaifeng
- 刊名：Computing Techniques for Geophysical and Geochemical Exploration
- 出版年：2012
- 卷期：34(6)
- 关键词：速度分析 ; velocity analysis ; 地震波测井 ; seismic logging
- 页码：p.696-702
- 图表：illus., 1 table, 13 refs.
- 分类号：1600
- issnNo：ISSN1001-1749
- isbnNo：CN51-1242/P
摘要
During the seismic explorations of complex mountainous regions in West China,the static corrections have not been completely resolved as a result of the difficulty in ascertaining surface velocity model.As a traditional and accurate investigation method of surface velocity,micro logging measurement is not confined by the complex surface conditions and is applicable to the investigation in complex regions.However its high production cost is not able to guarantee the continuous observation point by point.Therefore,the continuous near-surface velocity model can’t be directly obtained.This paper proposed a three-dimensional modeling method by geological statistics of micro logging discrete data in rugged topography.The steps are as follows: First,ground surface is formed using measured data in seismic exploration.Then,the bottom surface of low velocity layer,which is related to terrain,is obtained using geological statistical techniques.On this basis,a geological framework model based on irregular surface and layered micro logging velocity is acquired.Finally,the surface velocity model of micro logging discrete data is received by near-surface geological structure and geological statistical technique.This method is applied to the HCL research area in northeast Sichun.The discrete data of 370 micro logging wells were used to get the three-dimensional surface velocity model.In comparison with the micro logging velocity,the velocity from the model is with a much higher accuracy.