Abstract
Gas hydrate is gradually considered as a potential energy resource. The presence of gas hydrate is commonly inferred from the appearance of “bottom simulating reflector”(BSR) on seismic section. Understanding the properties of hydrate-bearing sediments and studying the AVO characteristics of BSR are of great significance. Although more and more domestic and international studies have been conducted on the subjects mentioned above, they are still in the primary stage and need a long way to go to be appled in practice, especially in the field of gas hydrate. Aiming at the identification of gas hydrate, we studied the characteristics of the AVO attributes based on the Biot’s theory when the sediments were bearing gas hydrate or free gas. The AVO attribute crossplots obtained from seismic sections with the forward simulation by means of staggered-grid finite-difference were compared with that of theoretic models. The coincidence shows that utilization of AVO attribute crossplots is an effective way to recognize gas hydrate and free gas.
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References
Aki, K. and Richards, P. G., 1980, Quantitative seismology: W. H. Freeman & Co.
Altan T. and Tokuo Y., Synthetic seismograms for marine sediments and determination of porosity and permeability: Geophysics, 53,1056–1067.
Biot, M. A., 1956, Theory of propagation of elastic waves in a fluid saturated porous solid, I, Low frequency range; I, higher frequency range: J. Acoustic. Soc. Am, 28,168–191.
Biot, M. A., 1962, Mechanics of deformation and acoustic propagation in porous media: J. Appl. Phys. 33,1482–1498.
Biot, M. A., 1962, Generalized theory of acoustic propagation in porous dissipative media: J. Acoustic. Soc. Am. 34,1254–1264.
Dai N., Vafidis A., and Kamasewish E. R., 1995, Wave propagation in heterogeneous, porous media: A velocity-stress, finite-difference method: Geophysics, Vol. 60(2), 327–340.
Dvorkin J., and Prasad M., 1999, Elasticity of marine sediments: Rock physics modeling: Geophysical Research Letters, 26 (12), 1781–1784.
Ecker, C, 2001, Seismic characterization of methane hydrate structure: A dissertation submitted to the department of geophysics and the committee on graduate studies of Stanford university.
Ecker, C, and Lumley, D. E., 1994, Seismic AVO analysis of methane hydrate structures: SEP-80,277–292.
Helgerud, M., Dvorkin, J., Nur, A., Sakai, A., and Collerr, T., 1999, Electric-wave velocity in marine sediments with gas hydrate: Effective medium modeling: Geophysical Research Letters, 26(13), 2021–2024.
Levander, A. R., 1988, Fourth-order finite-difference P-SV seismograms: Geophysics, Vol. 53,1425–1436.
Ma Zaitian, Song Haibin, Sun Jianguo, 2000, New geophysical technology for exploring gas hydrate: Geophysical Progress, 15(3), 1–6
McGee T M., 2000, A single-channel seismic reflection method for quantifying lateral variation in BSR reflectivity: Marine Geology, 164,29–35.
Shiply T H, Houstan M H, Buffler R T, et al., 1979, Seismic evidence for widespread possible gas hydrate horizons on continental slopes and rises: AAPG Bulletin, 63(12), 2204–2213.
Shuey, R. D., 1985, A simplification of the Zoeppritz equations: Geophysics, 50,609–614.
Smith G. G., and Gidlow P.M., 1987, Weighted Stacking for rock Proprty estimation and detection of gas: Geophys. Prosp., 35,993–1014.
Song Haibin et al., 2001, Primary study on gas hydrate in the Dongsha Sea Waters in the north of South China Sea: Geophysical Bulletin, 44 (5), 687–694.
Tinivella, U., 1999, A method for estimating gas hydrate and free gas concentrations in marine sediments: Boll. Geof. Teor. Appl., 40,19–30.
Zhang Yuwen, Liu Xuewei, Li Hai’ou, 2004, AVO analysis of pseudo seafloor reflections (BSRs) based on the single-phase and two-phase media: Petroleum Geophysical Prospecting, Vol.43, No. 3.
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This work was supported by Projects of the Nation’s Priority Fundamental R & D Program (Code: G20000467).
First author:
Zhang Yuwen, Ph D, teaching in China University of Geo-sciences (Beijing) and majoring in AVO of two-phase medium, gas hydrate, seismic data processing, and integration of gravity, magnetic and seismic methods.
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Zhang, Y., Liu, X. & Yao, C. Recognition of gas hydrate using AVO-attribute crossplots based on the porous medium theory. Appl. Geophys. 2, 7–13 (2005). https://doi.org/10.1007/s11770-005-0002-z
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DOI: https://doi.org/10.1007/s11770-005-0002-z