| 基于三相孔隙弹性理论的火山岩气层岩石物理响应特征分析 |
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| 引用本文： | 吴清岭,赵海波,李来林,范兴才.基于三相孔隙弹性理论的火山岩气层岩石物理响应特征分析[J].应用地球物理,2008,5(4):277-283. |
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| 作者姓名： | 吴清岭 赵海波 李来林 范兴才 |
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| 作者单位： | 中国科学院地质与地球物理研究所，大庆油田勘探开发研究院 |
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| 摘 要： | Unlike previous theories with velocity and/or elastic modulus averaging, we use a three-phase porous rock physics model developed by Santos for analyzing the seismic response of two immiscible fluids in saturated porous media. Considering reservoir reference pressure and coupling drag of two fluids in pores, the effects of frequency, porosity, and gas saturation on the phase velocities of the P-and S-waves are discussed in detail under field conditions. The effects of porosity and gas saturation on Vp/Vs are also provided. The data for our numerical experiments are from a sample of deep volcanic rock from Daqing. The numerical results show that the frequency dispersion effect can be ignored for deep volcanic rocks with low porosity and low permeability. It is concluded that for deep volcanic rocks the effect of gas content in pores on Vp/Vs is negligible but the effect of porosity is significant when there is a certain amount of water contained in the pores. The accurate estimate of lithology and porosity in this case is relatively more important.
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| 关 键 词： | 岩石 物理学 分析 方法 |
Analysis of rock physics response of gas-bearing volcanic reservoir based on three-phase poroelastic theory |
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| Qingling Wu,Haibo Zhao,Lailin Li,Xingcai Fan.Analysis of rock physics response of gas-bearing volcanic reservoir based on three-phase poroelastic theory[J].Applied Geophysics,2008,5(4):277-283. |
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| Authors: | Qingling Wu Haibo Zhao Lailin Li Xingcai Fan |
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| Institution: | [1]Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China [2]Research Institute of Exploration and Development Institute of Daqing OilField Co. Ltd., Daqing 163712, China |
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| Abstract: | Unlike previous theories with velocity and/or elastic modulus averaging,we use a three-phase porous rock physics model developed by Santos for analyzing the seismic response of two immiscible fluids in saturated porous media.Considering reservoir reference pressure and coupling drag of two fluids in pores,the effects of frequency,porosity,and gas saturation on the phase velocities of the P-and S-waves are discussed in detail under field conditions.The effects of porosity and gas saturation on Vp/Vs are also provided.The data for our numerical experiments are from a sample of deep volcanic rock from Daqing.The numerical results show that the frequency dispersion effect can be ignored for deep volcanic rocks with low porosity and low permeability.It is concluded that for deep volcanic rocks the effect of gas content in pores on Vp/Vs is negligible but the effect of porosity is significant when there is a certain amount of water contained in the pores.The accurate estimate of lithology and porosity in this case is relatively more important. |
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| Keywords: | rock physics three-phase porous media seismic response and volcanic rock |
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