Gassmann模型机理分析及其应用
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摘要
岩石物理理论模型是地震岩石物理研究的基础。分析了Gassmann模型的机理,探讨了该模型的适用性和关键参数。在此基础之上,提出了基于Gassmann模型正反演相结合的横波速度曲线优化估算方法,通过对Gassmann模型的解析和转换推导,分析了横波计算误差的影响因素,研究了孔隙流体区分的敏感属性参数优选方法。研究结果为利用地震资料进行储层表征和流体预测提供了实用技术系列和指导方法。
Theoretical model of rock physics is a foundation in study of seismic rock physics.This paper reviewed the mechanism of Gassmann model and studied its adaptability and key parameters.Based on Gassmann model,a new method is proposed to estimate S-wave velocity from P-wave velocity using forward and inverse modeling.Factors affecting S-wave velocity calculation were analyzed,and attributes sensitive to fluid were investigated.The result could provide a practical technology for seismically characterizing and predicating reservoir.
Theoretical model of rock physics is a foundation in study of seismic rock physics.This paper reviewed the mechanism of Gassmann model and studied its adaptability and key parameters.Based on Gassmann model,a new method is proposed to estimate S-wave velocity from P-wave velocity using forward and inverse modeling.Factors affecting S-wave velocity calculation were analyzed,and attributes sensitive to fluid were investigated.The result could provide a practical technology for seismically characterizing and predicating reservoir.
引文
1Wang Zhijing.Fundamentals of seismic rock physics[J].Geophysics,2001,66(2):398～412
2马中高.成岩作用和岩石结构对砂岩弹性速度的影响[J].石油学报,2008,29(1):58～63
3Mavko G,Mukerji T,Dvorkin J.Rock physics hand-book[M].Cambridge:Cambridge University Press,2003.340
4Gassmann F.Elastic waves through a packing of spheres[J].Geophysics,1951,16(4):673～685
5Biot M A.Theory of propagation of elastic waves in a fluid saturated porous solid[J].Journal of the Acous-tical Society of America,1956,28(2):168～191
6Han D H,Nur A,Morgan D.Effects of porosity and clay content on wave velocities in sandstones[J].Geo-physics,1986,51(11):2093～2107
7郭栋,印兴耀,吴国忱.横波速度计算方法与应用[J].石油地球物理勘探,2007,42(5):535～538
8王玉梅,苗永康,孟宪军.岩石物理横波速度曲线计算技术[J].油气地质与采收率,2006,13(4):58～61
9邓继新,王尚旭,李生杰,等.砂岩储层地震属性参数对孔隙流体的敏感性评价[J].石油学报,2006,27(6):55～59
2马中高.成岩作用和岩石结构对砂岩弹性速度的影响[J].石油学报,2008,29(1):58～63
3Mavko G,Mukerji T,Dvorkin J.Rock physics hand-book[M].Cambridge:Cambridge University Press,2003.340
4Gassmann F.Elastic waves through a packing of spheres[J].Geophysics,1951,16(4):673～685
5Biot M A.Theory of propagation of elastic waves in a fluid saturated porous solid[J].Journal of the Acous-tical Society of America,1956,28(2):168～191
6Han D H,Nur A,Morgan D.Effects of porosity and clay content on wave velocities in sandstones[J].Geo-physics,1986,51(11):2093～2107
7郭栋,印兴耀,吴国忱.横波速度计算方法与应用[J].石油地球物理勘探,2007,42(5):535～538
8王玉梅,苗永康,孟宪军.岩石物理横波速度曲线计算技术[J].油气地质与采收率,2006,13(4):58～61
9邓继新,王尚旭,李生杰,等.砂岩储层地震属性参数对孔隙流体的敏感性评价[J].石油学报,2006,27(6):55～59
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