含流体浊积岩速度与衰减各向异性特征研究——以北海浊积岩为例  

A study of velocity and attenuation anisotropy characteristics of turbidite thin interbed saturated with fluid: A case study of Beihai turbidite

作　　者：唐杰[1,2] 王浩 李健[1,2] 苏文涵 姚振岸[1,2] 

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [2]海洋国家实验室海洋矿产资源评价与探测技术功能实验室,山东青岛266071

出　　处：《物探与化探》2017年第1期153-157,共5页Geophysical and Geochemical Exploration

基　　金：国家自然科学基金项目(41504097;41374123);山东省自然科学基金项目(ZR2013DQ020)

摘　　要：研究了含流体浊积岩储层的速度与衰减各向异性特征,分析了影响含流体浊积岩储层速度与衰减各向异性特征的主要因素。研究表明低频与高频条件下获得的含流体浊积岩弹性模量存在较大差异。通过速度各向异性分析可知,随着饱和度的增加,纵波速度增大;随着角度的增加,纵波速度增大;随着净毛比的增大,纵波速度减小。衰减各向异性分析结果表明层间流体流动导致平行于层理的纵波衰减小于垂直于层理面的纵波衰减;衰减依赖于介质非均匀性,当介质非均匀性最大时,衰减最大。In this paper,the authors studied velocity and attenuation anisotropy characteristics of turbidite thin interbed saturated with fluid,and analyzed the main influence factors such as group angle’net-to-gross’saturation and porosity.The results show that there are differences in condition between low frequency and high frequency.Through the anisotropy velocity analysis,the authors detected that compressional wave velocity increases with the increase of saturation and angle,and compressional wave velocity decreases with the in-crease of the net to gross.Through the attenuation anisotropy analysis,it＇s known that compressional wave attenuation parallel to the bed-ding is less than the result perpendicular to the bedding plane.Attenuation depends on the medium heterogeneity,and when medium in-homogeneity is maximum,attenuation is the largest.

关 键 词：浊积岩 速度各向异性 衰减各向异性 Backus理论 GASSMANN方程 

分 类 号：P631.4[天文地球—地质矿产勘探]