上覆压力变化时孔隙岩层弹性波速度的确定及其普遍意义
摘要
在沉积正旋回砂砾岩储层的探井中采集了不同岩性的典型样品.在不同的有效覆盖压力P及孔隙流体为不同相态（气饱和、水饱和和油饱和）下测试了岩石的纵、横波速度（Vp,Vs）,分析了不同类型的孔隙流体对速度的影响.用适于低频条件下的Gassmann方程计算水饱和样品的Vp,Vs值,并和实验结果（高频条件下）比较,认为运用Gassmann理论一般可用于计算含有孔隙流体的岩石弹性波速度,以此预测由于孔隙流体的变化所引起的岩石速度的变化,精度是在石油工程的许可范围内的,其结果对声波测井和地震勘探资料处理具有理论和实际意义.
引文
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2 Gassmann F. Elastic waves through a packing of spheres. Geophysics, 1951, 16: 673-682
3 Dvorkin J, Mavko G, Nur A. Squirt flow in fully saturated rocks. Geophysics, 1995, 60: 97-107
4 Mavko G, Christina, Mukerji T. Fluid substitution: Estimating changes in Vp without knowing Vs. Geophysics, 1995, 60: 1750-1755
5 Berryman J G, Milton G W. Exact results for generalized Gassmann's equations in composite porous media with two constituents. Geophysics, 1991, 56: 1950
6 Yin H, Nur A, Mavko G. Critical porosity-----a physical boundary in poroelastisity. J R Mechanics, 1993, 30: 805-808
7 Spencer J W, Cates E, Thompson D. Frame moduli of unconsolidated sands and sandstones. Geophysics, 1994, 59: 1352-1361
8 Winkler W. Estimates of velocity dispersion between seismic and ultrasonic frequencies. Geophysics, 1986, 51: 183-189
9 Nolen-Hoeksema. Modulus-porosity relations, Gassmanns's equations, and the low-frequency elastic wave response to fluids. Geophysics, 2000, 65: 1355-1363
10 Mavko G, Mukerji T, Dvorkin J. The rock physics handbook: Tools for seismic analysis in porous media. Cambridge: Cambridge Univ Press, 1998
11 沈联蒂,史 謌.岩性、含油气性、有效覆盖压力对纵横波速度的影响.地球物理学报,1994,37:391～398
12 Walsh J B. New analysis of attenuation of patially melted rock. J Geophys Res, 1969, 74: 4333-4337
2 Gassmann F. Elastic waves through a packing of spheres. Geophysics, 1951, 16: 673-682
3 Dvorkin J, Mavko G, Nur A. Squirt flow in fully saturated rocks. Geophysics, 1995, 60: 97-107
4 Mavko G, Christina, Mukerji T. Fluid substitution: Estimating changes in Vp without knowing Vs. Geophysics, 1995, 60: 1750-1755
5 Berryman J G, Milton G W. Exact results for generalized Gassmann's equations in composite porous media with two constituents. Geophysics, 1991, 56: 1950
6 Yin H, Nur A, Mavko G. Critical porosity-----a physical boundary in poroelastisity. J R Mechanics, 1993, 30: 805-808
7 Spencer J W, Cates E, Thompson D. Frame moduli of unconsolidated sands and sandstones. Geophysics, 1994, 59: 1352-1361
8 Winkler W. Estimates of velocity dispersion between seismic and ultrasonic frequencies. Geophysics, 1986, 51: 183-189
9 Nolen-Hoeksema. Modulus-porosity relations, Gassmanns's equations, and the low-frequency elastic wave response to fluids. Geophysics, 2000, 65: 1355-1363
10 Mavko G, Mukerji T, Dvorkin J. The rock physics handbook: Tools for seismic analysis in porous media. Cambridge: Cambridge Univ Press, 1998
11 沈联蒂,史 謌.岩性、含油气性、有效覆盖压力对纵横波速度的影响.地球物理学报,1994,37:391～398
12 Walsh J B. New analysis of attenuation of patially melted rock. J Geophys Res, 1969, 74: 4333-4337
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