石油物探2017，Vol.56Issue(3)：338-348,11.DOI:10.3969/j.issn.1000-1441.2017.03.004
实验室尺度下气水两相裂缝型介质弹性波速度的数值模拟分析
Numerical simulation of elastic wave velocity in gas-water two-phase rock from fractured model
摘要
Abstract
Owing to the heterogeneous structure of the core,it is difficult to study the relationship between elastic wave velocity and rock mechanical parameters by means of experiments.And the work of ultrasonic testing is costly and time-consuming.Based on elastic wave theory and Wood pore fluid modulus model,we simulated the elastic wave field in gas-water two-phase rock from fractured model by using staggered grid finite difference method.We also calculated the P-wave velocity,S-wave velocity and wave velocity ratio of the core in the condition of different fracture distribution,porosity,fracture occurrence,fracture density and water saturation.And the effect of these factors on the wave velocity was discussed.The numerical calculation method is simple and its accuracy is high.It has a certain guiding significance in the inversion for rock pore structure by the elastic wave velocity.关键词
弹性波速度/波动理论/气水两相/介质/裂缝Key words
elastic wave velocity/wave propagation theory/gas-water two-phase/medium/fracture分类
天文与地球科学引用本文复制引用
段茜,刘向君..实验室尺度下气水两相裂缝型介质弹性波速度的数值模拟分析[J].石油物探,2017,56(3):338-348,11.基金项目
国家自然科学基金重点项目(51134004)资助.This research is financially supported by the National Natural Science Foundation of China (Grant No.51134004). （51134004）
