可变干岩石骨架等效模型研究  

The research of variable dry rock matrix equivalent model

作　　者：杨凤英 印兴耀[1] 刘博 

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

出　　处：《石油物探》2014年第3期280-286,共7页Geophysical Prospecting For Petroleum

基　　金：国家重点基础研究发展计划项目(2013CB228604);国家科技重大专项(2011ZX05030-004-002;2011ZX05009-003-004)联合资助

摘　　要：基于岩石物理理论构建等效岩石物理模型进行弹性模量及横波速度预测时,需要计算等效矿物模量、等效干岩石骨架模量、流体等效模量等参数,因此需要建立精确的岩石物理等效模型。基于前人的研究成果,将含有可变参数的干岩石骨架等效弹性模量代入到耦合的微分等效介质(DEM)模型,使得耦合的微分方程解耦为常微分方程,经进一步简化得到了一种新的可变干岩石骨架等效模型(VDEM)。基于实验室测量数据的试算结果表明,可变干岩石骨架等效模型提高了干岩石骨架等效弹性模量的预测精度。Equivalent mineral moduli,equivalent dry rock matrix moduli,equivalent fluid moduli and other parame ters are needed while constructing the rock physics model to predict elastic moduli and S-wave velocity based on rock physics theory,so accurate rock physical equivalent models are essential.A new method is proposed to obtain dry rock matrix equivalent moduli.Firstly,we put the dry rock matrix moduli with variable parameters into differential effective medium model to decouple the differential equations.Then these equations are simplified to get the variable dry rock matrix equivalent model.Laboratory data calculating shows that the variable dry rock matrix equivalent model improves the prediction accuracy of dry rock equivalent moduli.

关 键 词：岩石物理模型 干岩石骨架 等效弹性模量 微分等效介质理论 可变参数 

分 类 号：P631.4[天文地球—地质矿产勘探]