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《Progress in Geophysics》 2014-05
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Comparison of dry rock moduli in different models and their applications

WU Long;LIU Tang-yan;WANG Hong-tao;XUE Miao-miao;PAN Hao-jie;State Key Lab of Marine Geology(Tongji University);Bureau of Geophysical Prospecting,CNPC;  
Fluid substitution is a rock physics issue in which we can understand and predict how seismic wave velocity and its impedance rely on pore-fluid.There are two problems in fluid substitution,too many parameters and a great deal of uncertainties.For example,it is pretty difficult to calculate dry rock moduli..First of all,we has built up rock physical models to check various methods to calculate dry rock moduli,and then the dry rock moduli can be obtained in these methods after inputting log data.Based on this study,Kuster-Toksz model can present rock dry moduli with good precision in low porosity area(carbonate reservoir).Pride's method of consolidation parameter is a good idea,but it is suitable only for high porosity area. Biot coefficients and Pride' consolidation parameters can join together by the critical porosity.Only by self-consistent model can we calculate the correct dry rock moduli both in low porosity and high porosity.
【Fund】: 国家863计划(2006AA06Z214);; 海洋地质国家重点实验室自主课题(MG20120205);; 油气藏地质与工程国家重点实验室开放基金(PLN1101)联合资助
【CateGory Index】: P631.4
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