基于SC-Gassmann模型的纵横波速度预测  

Waves velocity prediction based on self-consistent model

作　　者：张祖豪[1] 林凯[1] 贺锡雷[1] ZHANG Zuhao LIN Kai HE Xilei(Col lege of Geophysics, Chengdu Universi ty of Technology,Chengdu 610059,China)

机构地区：[1]成都理工大学地球物理学院,成都610059

出　　处：《物探化探计算技术》2017年第2期248-252,共5页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家自然科学基金项目(41374111);国家自然科学基金青年基金项目(41404101)

摘　　要：通过自相容近似模型和Biot理论相结合建立岩石物理模型,提出基于SC-Gassmann模型的速度预测方法。从实际测井资料中提取岩石物性参数,利用测井资料基于V-R-H模型来计算岩石基质弹性模量,然后通过自相容近似模型和Biot理论结合建立的岩石物理模型来计算干岩样骨架弹性模量,最后通过Gassmann方程加入流体,求得饱和岩石弹性模量,并预测储层岩石纵横波速度。实际资料计算表明,通过岩石物理模型计算的饱和岩石纵横波速度与实际数据吻合较好,符合实际地质情况,证明该方法可靠有效。In this paper, the Gassmann theory, Biot theory and elastic wave theory are combined to quanti tatively analyze the relationship between the physical parameters of the rock and the seismic dynamic parameters. The physical parameters of rocks are extracted from the actual well logging data. Based on the self -consistent model, the log data is used to predict the wave velocity. The elastic properties of rock with fluid and the waves velocity are calculated through the rock physical model, which provides a basis for reservoir prediction and fluid identification in this paper. The predicted results obtained by this meth-od are in agreement with the log data. This is consistent with the actual geological conditions, which proves that the method is reliable and effective.

关 键 词：GASSMANN方程 自相容近似模型 纵横波速度预测 

分 类 号：P631.4[天文地球—地质矿产勘探]