水力振荡波在注水地层中的传播规律
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摘要
水力振荡波可以在注水井近井激发地层应力波,应力波在饱和流体多孔介质中的传播规律是波动注水技术的理论基础。基于连续介质力学理论,考虑流体对岩石骨架的阻尼作用,建立了能够描述水力振荡波在多孔介质中传播规律的单相介质模型。采用有限元的求解方法,对模型进行了求解,得到了水力振荡波激发多孔介质应力波以及应力波在多孔介质中的传播规律,并分析了水力振荡波频率特性对传播规律的影响,认为波动注水采用低频水力振荡波才能达到理想效果。
Formation stress wave is stimulated by the hydro wave near water injection wells,as well as the propagation law of stress wave in fluid saturated porous media provides theoretical basis for the technology of water injection with hydro wave.On the basis of the continuum mechanics,taking the damping effect of fluid on rock matrix into consideration,the single-phase medium model describing the propagation law of hydro wave in porous media is established.The model is solved by the finite element method,as well as the propagation law of stress wave stimulated by the hydro wave is obtained.In addition,the propagation law affected by the frequency is discussed.It is considered that the best effect can be achieved only by utilizing wave with low frequency in water injection with hydro wave.
Formation stress wave is stimulated by the hydro wave near water injection wells,as well as the propagation law of stress wave in fluid saturated porous media provides theoretical basis for the technology of water injection with hydro wave.On the basis of the continuum mechanics,taking the damping effect of fluid on rock matrix into consideration,the single-phase medium model describing the propagation law of hydro wave in porous media is established.The model is solved by the finite element method,as well as the propagation law of stress wave stimulated by the hydro wave is obtained.In addition,the propagation law affected by the frequency is discussed.It is considered that the best effect can be achieved only by utilizing wave with low frequency in water injection with hydro wave.
引文
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[4]於文辉,张丽琴,王家映,等.从多相的角度看勘探地震与开发地震波动方程的差异[J].石油地球物理勘探,2003,38(6):690-700.
[5]李骥,张焱,张红梅,等.振动采油中地层饱和多孔介质波动规律研究新方法[J].石油钻采工艺,2000,22(4):48-51.
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