油水两相饱和储层中震电耦合波传播规律研究

发布时间：2018-05-17 20:51

本文选题：含油储层 + 弹性波动　；参考：《中国石油大学(华东)》2015年硕士论文

【摘要】：储层岩石中震电效应的研究对于揭示震电勘探和声电测井机理有着重要的意义,但现有的孔隙介质震电理论研究仅停留在水饱和条件下,缺乏针对含油储层震电耦合的数学模型及定量模拟,制约了震电方法在含油储层中的推广与应用。本文将油水两相饱和储层弹性波动理论和含油储层动电耦合理论相结合,建立油水两相饱和储层震电耦合理论,对储层孔隙介质中震电耦合波传播规律进行定量模拟,并定量分析储层参数对震电耦合波传播规律的影响,从理论上揭示油水两相饱和储层震电耦合机制。首先,依据学者建立的非饱和多孔介质弹性波动理论,考虑储层孔隙为油、水两种流体饱和情况,推导含油储层中弹性波传播方程。数值模拟油水两相饱和储层中弹性波的传播特性,并探究储层参数对弹性波传播的影响,为油水两相饱和储层中震电效应研究奠定弹性波动理论基础。然后,针对储层孔隙饱和油和水两种流体时的储层震电效应研究,将建立的油水两相饱和储层中弹性波动理论与含油储层中动电耦合理论及麦克斯韦电磁理论相结合,建立描述油水两相饱和储层震电耦合的数学模型。对含油储层中平面震电波场响应特性进行定量模拟,并探讨孔隙度、渗透率和饱和度等参数对震电波场响应特性的影响。最后,将震电效应研究继续扩展到饱和冻土中去,利用含油储层中震电效应理论建立方法,将饱和冻土中弹性波动理论与多孔介质动电耦合理论及麦克斯韦电磁理论相结合,建立描述饱和冻土中震电耦合的数学模型,对饱和冻土中震电耦合波的传播特性和电磁特性进行定量模拟,并探讨饱和冻土孔隙度、含冰量等参数对震电波场响应特性的影响。
[Abstract]:The study of seismoelectric effect in reservoir rocks is of great significance for revealing the mechanism of seismoelectric exploration and acoustoelectric logging, but the existing research on seismoelectric theory of porous media is only under the condition of water saturation. The lack of mathematical model and quantitative simulation for seismoelectric coupling in oil-bearing reservoirs restricts the popularization and application of seismoelectric methods in oil-bearing reservoirs. In this paper, the elastic wave theory of oil-water two-phase saturated reservoir is combined with the electrokinetic coupling theory of oil-bearing reservoir, and the seismoelectric coupling theory of oil-water two-phase saturated reservoir is established, and the propagation law of seismoelectric coupling wave in reservoir pore media is simulated quantitatively. The influence of reservoir parameters on the propagation law of seismoelectric coupling wave is analyzed quantitatively, and the mechanism of seismoelectric coupling in oil-water two-phase saturated reservoir is revealed theoretically. Firstly, according to the elastic wave theory of unsaturated porous media established by scholars, the elastic wave propagation equation in oil-bearing reservoir is derived by considering that the pore is oil and water is saturated. Numerical simulation of the propagation characteristics of elastic wave in oil-water two-phase saturated reservoir and the influence of reservoir parameters on elastic wave propagation lay the foundation of elastic wave theory for the study of seismoelectric effect in oil-water two-phase saturated reservoir. Then, aiming at the study of seismic and electrical effects of porous saturated oil and water, the elastic wave theory in oil-water two-phase saturated reservoir is combined with the coupling theory in oil-bearing reservoir and Maxwell's electromagnetic theory. A mathematical model describing the seismoelectric coupling of oil-water two-phase saturated reservoir is established. The response characteristics of plane seismic wave field in oil-bearing reservoir were quantitatively simulated, and the effects of porosity, permeability and saturation on the response characteristics of seismic wave field were discussed. Finally, the study of seismoelectric effect is extended to saturated permafrost, and the theory of seismoelectric effect in oil-bearing reservoir is established, and the elastic wave theory in saturated permafrost is combined with the theory of electrokinetic coupling of porous media and Maxwell's electromagnetic theory. A mathematical model describing the seismoelectric coupling in saturated permafrost is established. The propagation and electromagnetic characteristics of the coupled seismic wave in saturated frozen soil are simulated quantitatively. The effects of porosity and ice content on the response characteristics of the seismic wave field are discussed.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P631

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