各向异性介质储层数值模拟及波场特征研究
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摘要
各向异性介质储层中波场特征的研究,有利于对多波资料的准确解释。在弹性波方程基础上,结合数值模拟技术与AVO技术,对多种介质模型和第二类含气砂岩储层模型进行数值模拟与波场特征描述。以表征介质各向异性程度的Thomsen参数为出发点,研究各参数对地震波场动力学和运动学特征的影响,并对第二类含气砂岩介质中模拟得到的正演记录,以及各向异性参数对波场的影响程度进行分析,进一步加深了对该类储层各向异性特征的认识,这为各向异性介质中的参数反演与地震资料解释提供了有力的参考依据。
The Research of wave fields characteristics facilitated to the accurate interpretation of multi-wave data.Based on the the elastic wave equation,this paper combined the numerical simulation technoque with AVO technique to forward and describe the wave fields characteristics of the seismic wave in various media models and the second-class gas-bearing sandstone reservoir.It started with the study of Thomsen parameters that characterized the degree of the anistropic,researched the influences of every parameter on characteristics of seismic wave,analyzed the forwarding record and the influence degree of the anistropic parameters in the second-class gas-bearing sandstone medium,which further deepened the cognition of the anistropic characteristics in the reservior,and provided a convincing basis for the anisotropic parameter inversion and seismic data interpretation.
The Research of wave fields characteristics facilitated to the accurate interpretation of multi-wave data.Based on the the elastic wave equation,this paper combined the numerical simulation technoque with AVO technique to forward and describe the wave fields characteristics of the seismic wave in various media models and the second-class gas-bearing sandstone reservoir.It started with the study of Thomsen parameters that characterized the degree of the anistropic,researched the influences of every parameter on characteristics of seismic wave,analyzed the forwarding record and the influence degree of the anistropic parameters in the second-class gas-bearing sandstone medium,which further deepened the cognition of the anistropic characteristics in the reservior,and provided a convincing basis for the anisotropic parameter inversion and seismic data interpretation.
引文
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[5]THOMSEN L.Weak elastic anisotropy[J].Geophys-ics.1986,51(10):1954.
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[7]苏巍,陈树民,刘财,等.各向异性介质弹性波场成像的Thomsen参数影响研究与分析[J].大庆石油地质与开发,2007,26(2):123.
[8]阴可,杨慧珠.各向异性介质中的AVO[J].地球物理学报,1998,41(3):382.
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[11]COLLINO F,TSOHKA C.Application of the perfectlymatched layer model to the linear elastodynamic problemin anisotropic heterogeneous media[J].Geophysics,2001,66:294.
[12]GRAVES R W.Simulating seismic wave propagation in3d elastic media using staggered-grid finite difference[J].Bull.Seism.Soc.Am,1996,86:1091.
[2]杨慧珠,巴晶,唐建侯,等.油气勘探中常规地球物理方法的发展[J].石油地球物理勘探,2006;41(2):231.
[3]牟永光,裴正林.三维复杂介质地震数值模拟[M].北京:石油工业出版社,2005.
[4]裴正林.三维各向异性介质中弹性波方程交错网格高阶有限差分法数值模拟[J].石油大学学报(自然科学版),2004,28(5):23.
[5]THOMSEN L.Weak elastic anisotropy[J].Geophys-ics.1986,51(10):1954.
[6]殷八斤,曾灏.AVO技术的理论与实践[M].北京:石油工业出版社,1995.
[7]苏巍,陈树民,刘财,等.各向异性介质弹性波场成像的Thomsen参数影响研究与分析[J].大庆石油地质与开发,2007,26(2):123.
[8]阴可,杨慧珠.各向异性介质中的AVO[J].地球物理学报,1998,41(3):382.
[9]KOSLOFF R,KOSLOFF D.Absorbing boundaries forwave propagation problems[J].Comput.Phys.,1986;63:363.
[10]JAMES SOCHAKI,ROBERT KUBICHEK,J GEORGE,et al.Absorbing boundary conditions and surface waves[J].Geophysics,1987,52(1):60.
[11]COLLINO F,TSOHKA C.Application of the perfectlymatched layer model to the linear elastodynamic problemin anisotropic heterogeneous media[J].Geophysics,2001,66:294.
[12]GRAVES R W.Simulating seismic wave propagation in3d elastic media using staggered-grid finite difference[J].Bull.Seism.Soc.Am,1996,86:1091.
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