流体替代的地震反射振幅特征分析
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摘要
在油田的开发阶段,注水或注气开采会引起储层物性的变化,同时储层所含流体也会发生改变,这就为时移地震监测提供了可能。笔者主要基于Gassmann方程,详细地论述了孔隙流体替代储层地震波速度和密度变化规律,并且根据预测的结果建立了含水饱和度变化地震地质模型。最后通过对该模型的振幅类地震属性分析,对地震属性进行了优选,找到了适合本工区时移地震监测的敏感性振幅属性,为预测工区剩余油的分布提供了基础。
In the oil field development stage,water or gas injection mining will change reservoir properties and the fluid inside the reservoir,which may provide a possiblity for time-lapse seismic monitoring.Mainly based on Gassmann equation,the authors discussed in detail the variation regularity of seismic velocity and density when the reservoir pore fluid is replaced,and established a seismic geological model for water saturation variation according to the forecast result.Through analyzing and optimizing the amplitude attributes extracted from the model,the sensitive time-lapse seismic attributes suitable for this area was finally found.The result provides a basis for predicting the distribution of remaining oil.
In the oil field development stage,water or gas injection mining will change reservoir properties and the fluid inside the reservoir,which may provide a possiblity for time-lapse seismic monitoring.Mainly based on Gassmann equation,the authors discussed in detail the variation regularity of seismic velocity and density when the reservoir pore fluid is replaced,and established a seismic geological model for water saturation variation according to the forecast result.Through analyzing and optimizing the amplitude attributes extracted from the model,the sensitive time-lapse seismic attributes suitable for this area was finally found.The result provides a basis for predicting the distribution of remaining oil.
引文
[1]刘绍文.墨西哥湾SouthTimbalier295区块浊积岩储层的4D地震监测[J].石油物探译丛,2001(1):63-80.
[2]杨勤永.Duri油田蒸汽驱的时延地震监测[J].石油物探译丛,1999(2):87-94.
[3]霍进,张新国,吴平.四维地震技术在稠油开采中的应用[J].石油勘探与开发,2001,23(3):80-86.
[4]Gassmann F.Elastic waves through a Peaking of spheres[J].Geo-physics,1951,16:673-682.
[5]Biot M A.Theory of propagation of elastic waves in a fluid saturat-ed porous solid:Low frequency range,andⅡ:Higher-frequencyrange[J].Journal of the Acoustical Society of America,1956,28:168-196.
[6]甘利灯.四维地震技术及其在水驱油藏监测中的应用[D].北京:中国地质大学,2002.
[2]杨勤永.Duri油田蒸汽驱的时延地震监测[J].石油物探译丛,1999(2):87-94.
[3]霍进,张新国,吴平.四维地震技术在稠油开采中的应用[J].石油勘探与开发,2001,23(3):80-86.
[4]Gassmann F.Elastic waves through a Peaking of spheres[J].Geo-physics,1951,16:673-682.
[5]Biot M A.Theory of propagation of elastic waves in a fluid saturat-ed porous solid:Low frequency range,andⅡ:Higher-frequencyrange[J].Journal of the Acoustical Society of America,1956,28:168-196.
[6]甘利灯.四维地震技术及其在水驱油藏监测中的应用[D].北京:中国地质大学,2002.
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