岩性、孔隙及其流体变化对岩石弹性性质的影响

doi:10.11743/ogg20050611

Abstract

Abstract:

A relational expression between fluid modulus and bulk modulus of fluid-bearing rocks is derived based on the Gassmann's equation.It reflects the influences of such factors as fluid modulus and lithology on the elastic properties of fluid-bearing rocks in the process of fluid displacement.Theoretical calculation and analysis show that fluid variation has relatively small influences on rocks with relatively large rigidity(hard),and has relatively large influences on rocks with relatively small rigidity(soft).The lower the rock porosity is,the more sensitive the bulk modulus of fluid-bearing rocks is to fluid variation,i.e.,the compressional velocity of seismic wave decreases with increasing rock porosity.When rock porosity and fluid modulus are relatively small,compressional velocity is relatively more sensitive to variation of fluid saturation.The results of fluid displacement experiments in real rock samples agree with the theoretical analysis.

Key words: fluid displacement, porosity, bulk modulus, velocity

CLC Number:

TE111.3

Li Shengjie. Influence of lithology,porosity and variation of pore fluid saturation on rock elastic property[J]. Oil & Gas Geology, 2005, 26(6): 760-764.

References

[1] 杜韫华,钱凯,张守鹏.中国天然气储层的岩石、古地理类型与勘探方向[J].石油与天然气地质,1999,20(2):140～143Du Yunhua,Qian Kai,Zhang Shoupeng.Exploration orientation and rock,palaeogeographic types of China's gas reservoirs[J].Oil & Gas Geology,1999,20(2):140-143
[2] 庄东海,许云,乌达巴拉.四维地震及其实施要求[J].石油与天然气地质,1999,20(4):361～364Zhuang Donghai,Xu Yun,Wu Dabala.4-D Seismic and its basic requirements[J].Oil & Gas Geology,1999,20(4):361-364
[3] 李传亮.岩石压缩系数测量方法的理论研究[J].石油与天然气地质,1998,19(4):280～284Li Chuanliang.A theoretical study on measurement of rock compacting factors[J].Oil & Gas Geology,1998,19(4):280-284
[4] King M S,Marsden J R,Dennis J W.Biot dispersion for P-and S-wave velocity in partially and fully saturated sandstone[J].Geophysical Prospecting,2000,48(6):1 075-1 089
[5] Mavko G,Nolen-Hoeksrma R.Estimating seismic velocity at ultrasonic frequencies in partially saturated rocks[J].Geophysics,1994,59(2):252-258
[6] Gassmann F.Elastic waves through a packing of spheres[J].Geophysics,1951,16(4):673-685
[7] Domenico S N.Effect of brine-gas mixture on velocity in an unconsolidated sand reservoir[J].Geophysics,1976,41(4):882-894
[8] Wang Z.Fundamentals of seismic rock physics[J].Geophysics,2001,66(2):398-412
[9] Mavko G,Mukerji T.Bound on low-frequency seismic velocity in partially saturated rocks[J].Geophysics,1998,63(11):918-924
[10] Berryman J,Milton G.Exact results for generalized Gassmann's equation in composite porous media with two constituents[J].Geophysics.1991,56(11):1 950-1 960
[11] Nolen-Hoeksema R.Modulus-porosity relations,Gassmann's equations,and the low-frequency elastic-wave response to fluids[J].Geophysics,2000,65(5):1 353-1 363
[12] Marion D,Mukerji T,Mavko G.Scale effects on velocity dispersion:From ray to effective medium theories in stratified media[J].Geophysics,1994,59(10):1 613-1 619
[13] Murphy W,Reische A,Hsu K.Modulus decomposition of compressional and shear velocity in sand bodies[J].Geophysics,1993,58(2):227-239
[14] Dvorkin J,Nolen-Hoeksema R,Amos Nur.The squirt-flow mechanism:macroscopic description[J].Geophysics,1994,59(2):428-438
[15] Nur A,Mavko G,Dvorkin J,et al.Critical porosity:a key to relating physical properties to porosity in rocks[J].The Leading Edge,1998,17(2):357-362

Influence of lithology,porosity and variation of pore fluid saturation on rock elastic property

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