考虑裂缝孔隙岩石渗流非均匀差异的地震波频散和衰减数值计算方法

• Format: Patent
• Language: Chinese
• Published: 12.04.2022
• Subjects: DETECTING MASSES OR OBJECTS; GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; MEASURING; PHYSICS; TESTING

本发明属于地震波传播和岩石物理学领域，提出了一种考虑裂缝孔隙岩石渗流非均匀差异的地震波频散和衰减数值计算方法。它考虑了含流体裂缝孔隙岩石介质内部不同尺度孔隙空间中渗透率存在的差异和非均匀性，首先建立了岩石内部微观尺度孔隙空间和中尺度孔隙空间中流体流动修正松弛时间的计算方法，进而计算模型的修正应力系数集和各向异性弹性张量系数，实现更符合实际岩石地震波传播特征的速度频散和衰减的数值计算，能对渗流状况复杂的油气储层的地震波速度频散和衰减响应特征进行更加精确的数值分析。 The invention belongs to the field of seismic wave propagation and rock physics, and provides a seismic wave frequency dispersion and attenuation numerical calculation method considering a crack pore rock seepage non-uniform difference. The method considers the difference and heterogeneity of permeability in pore spaces with different scales in a fluid-containing crack pore rock medium, and comprises the following steps of: firstly, establishing a calculation method for fluid flow correction relaxation time in a micro-scale pore space and a mesoscale pore space in a rock, and then calculating a corrected stress coefficient set and an anisotropic elastic tensor coefficient of the model, thereby realizing numerical calculation of velocity dispersion and attenuation more conforming