摘要
Biot流动机制和喷射流动机制是含流体孔隙介质中的两种重要的力学机制,同时包含这两种机制的BISQ模型能够更好地反映孔隙介质中弹性波的传播规律。本文从BISQ模型的基本方程出发,推导了完全匹配层(PML)吸收边界的交错网格高阶有限差分方法的表达式,对双相各向同性介质中地震波场进行了数值模拟;然后通过调整孔隙度、渗透率等储层参数,对比分析了储层参数对双相介质波场特征的影响。数值模拟结果表明,基于BISQ模型的正演模拟正确反映了双相各向同性介质的波场特征;储层参数取值变化对波场特征的影响也十分明显。
Biot-flow and squirt-flow are two most important mechanisms in porous media containing fluids.The BISQ model involving these two mechanisms can reflect very well the propagation law of elastic wave in porous media.A seismic wave modeling of two-phase media based on BISQ model is proposed in this paper.From the fundamental equations of BISQ model,we first derive the expression of a staggered grid and high-order finite difference method using the absorbing boundary of perfect matched layer(PML).Then we carry out a numerical modeling of seismic wave filed in the two-phase isotropic media.Finally we analyze impacts of parameter variation upon wave filed by adjusting the porosity and permeability parameters.The numerical modeling results show that the forward modeling based on BISQ model correctly reflect the wave field characteristics in two-phase isotropic media,and that the influences caused by the variation of model parameters on wave field are very obvious.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2012年第6期901-907,1024+839,共7页
Oil Geophysical Prospecting
基金
国家自然科学基金项目(40873035)
数学地质四川省重点实验室开放基金项目(SCSXDZ2011)联合资助
