Abstract
Rock pore structure is one of the important parameters in controlling both seismic wave velocity and permeability in sandstones and carbonate rocks. For a given porosity of two similar rocks with different pore structures, their acoustic wave speeds can differ 2 km/s, and permeability can span nearly six orders of magnitude from 0.01 mD to 20 D in both sandstone and limestone. In this paper, we summarize a two-parameter elastic velocity model reduced from a general poroelastic theory, to characterize the effect of pore structures on seismic wave propagation. For a given mineralogy and fluid type of a reservoir, this velocity model is defined by porosity and a frame flexibility factor, which can be used in seismic inversion and reservoir characterization to improve estimation of porosity and reserves. The frame flexibility factor can be used for quantitative classification of rock pore structure types (PST) and may be related to pore connectivity and permeability, using both poststack and prestack seismic data. This study also helps explain why amplitude versus offset analysis (AVO) in some cases fails for the purpose of fluid detection: pore structure effect on seismic waves can mask all the fluid effects, especially in carbonate rocks.
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References
Anstey, N., 1991, Velocity in thin section: First Break, 9,449–457.
Anselmetti, F.S., and Eberli, G.P., 1993, Controls on sonic velocity in carbonates: Pure Appl. Geophys., 141,287–323.
Basan, P.B., Lowden, B.D., Whattler, P.R., and Attard, J.J., 1997, Pore-size data in petrophysics: a perspective on the measurement of pore geometry, in Lovell, M. A., and P. K. Harvey, P.K., Eds.,
Development in Petrophysics: Geological Society Special Publication No. 122, pp47–67.
Gist, G.A., 1994, Seismic attenuation from 3-D heterogeneities: A possible resolution of the VSP attenuation paradox: 64th Ann. Internat. Mtg., Society of Exploration Geophysicists Expanded Abstracts, 1042–1045.
Gregory, A.R., 1976, Fluid saturation effects on dynamic elastic properties of sedimentary rocks: Geophysics, 41, 895–921.
Han, D.-H., Nur, A., and Morgan, D., 1986, Effects of porosity and clay content on wave velocities in sandstones: Geophysics, 51, 2093–2107.
King, M. K., Chaudhry, N. A., and Shakeel, A., 1995, Experimental ultrasonic velocities and permeability for sandstones with aligned cracks: Internat. J. Rock Mech. Min. Sci. and Geomech. Abstr., 32, 155–163.
Massaferro, J.L., Anselmetti, F., Eberli, G.P., Baechle, G., Bracco Gartner, G., and Sun, Y.F., 2002, Effects of pore types on velocity and permeability in carbonates: Exploration and Production News Letter, EP2002-7025, Shell International Exploration and Production B.V., 37–39.
Massaferro, J.L., Eberli, G.P., Baechle, G., Weger, R., and Sun, Y.F., 2004, Effects of Pore Types on Velocity and Permeability in Carbonate rocks: Applications of Sun Model to Core-Log-Seismic Inversion: Final Game Changer Report, Shell International Exploration and Production B.V.
Nur, A. and Simmons, G. 1969, The effect of saturation on velocity in low porosity rock: Earth and Planet Science Letters, 7, 183–193.
Russell, B.H., Hedlin, K., Hilterman, F.J., and Lines L.R., 2003, Fluid-property discrimination with AVO: A Biot-Gassmann perspective: Geophysics, 68, 29–39.
Sun, Y.F., 1994, On the Foundations of the Dynamical Theory of Fractured Porous Media and the Gravity Variations Caused by Dilatancies: Ph.D. Dissertation, Columbia University.
Sun, Y.F., 2000, Core-log-seismic integration in hemipelagic marine sediments on the eastern flank of the Juan de Fuca Ridge, in Fisher, A., Davis, E. E., and Escutia, C, Eds., Proceedings of Ocean Drilling Program, Scientific Results, 168: Texas A&M, College Station TX, 21–35.
Sun, Y.F., 2001, Pore Structure Effects on Velocity-Porosity Relationship in Carbonates: Shell Technical Report EP2001-5092, Shell International Exploration and Production B.V.
Sun, Y.F., 2003, Numerical modeling of pore structure effect on elastic wave propagation: submitted to Journal of Computational Acoustics.
Sun, Y.F., and Goldberg, D., 1997, Effects of aspect ratio changes on wave velocities in fractured rocks: 67th Ann. Internat. Mtg., Society of Exploration Geophysicists Expanded Abstracts, SEG Expanded Abstract, 925–928..
Sun, Y.F., Massaferro, J.L., Eberli, G., and Teng, Y.-C, 2002, Quantifying the effects of pore structure and fluid saturation on acoustic wave velocity in carbonates, in Shang, E.-C, Li, Qihu, and Gao, T.F., Eds., Theoretical and Computational Acoustics 2001: World Scientific Publishing Co., 335–347.
Wang, Z. and Nur, A., 1990, Dispersion analysis of acoustic velocities in rocks: Journal of Acoustic Society of America, 87, 2384–2395.
Wang, Z., Hirsche, W.K., and Sedgwick, G., 1991, Seismic velocities in carbonate rocks: J. Canadian Petro. Tech., 30, 112–122.
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Yue-Feng Sun received a BS (1982) from East China Petroleum Institute and a PhD (1994) from Columbia University. From 1982 to 1987 he worked at Xinjiang Oil Company, China. Currently he is a Doherty Research Scientist at Lamont-Doherty Earth Observatory of Columbia University and an Adjunct Associate Professor at University of Miami. His academic interests include general mechanics of fractured porous media, electrodynamics, and gravitation, with applications to reservoir geophysics, gas hydrate studies, biogeophysics, and geodynamics. He is a member of SEG, the American Geophysical Union, the American Physical Society, and the American Mathematical Society.
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Sun, YF. Seismic signatures of rock pore structure. Appl. Geophys. 1, 42–49 (2004). https://doi.org/10.1007/s11770-004-0029-6
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DOI: https://doi.org/10.1007/s11770-004-0029-6