Reservoir permeability from seismic attribute analysis
Reservoir permeability from seismic attribute analysis
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DOI：
10.1190/1.2896629
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发表时间：
2008-03
期刊：
影响因子：
3.3
通讯作者：
G. Goloshubin;D. Silin;V. Vingalov;G. Takkand;Monir Latfullin
中科院分区：
文献类型：
--
作者：
G. Goloshubin;D. Silin;V. Vingalov;G. Takkand;Monir Latfullin
在孔隙流体饱和介质的情况下，毕奥的孔隙弹性理论预测了地震波通过介质传播时孔隙流体相对于骨架的运动。这一现象为研究油气饱和储层的渗流特性提供了可能。众所周知，如果多孔材料是均匀的且胶结良好，则在地震频率下相对流体运动变得可以忽略不计。在这种情况下，理论预测低估了地震波速度的色散和衰减。基于毕奥的理论，海勒等人（2003）数值模拟了岩石中渗透率和饱和度的非均匀性对速度和衰减的实质性影响。除了流体流动效应之外，散射效应（Gurevich等人，1997）在细层状多孔岩石和非均质流体饱和度的情况下起着非常重要的作用。我们已经使用流体流动和散射效应来导出与流体流度成比例的频率相关的地震属性，并将其应用于储层渗透率分析。
In case of porous fluid-saturated medium the Biot's poroelasticity theory predicts a movement of the pore fluid relative to the skeleton on seismic wave propagation through the medium. This phenomenon opens an opportunity for investigation of the flow properties of the hydrocarbon-saturated reservoirs. It is well known that relative fluid movement becomes negligible at seismic frequencies if porous material is homogeneous and well cemented. In this case the theory predicts an underestimated seismic wave velocity dispersion and attenuation. Based on Biot's theory, Helle et al. (2003) have numerically demonstrated the substantial effects on both velocity and attenuation by heterogeneous permeability and saturation in the rocks. Besides fluid flow effect, the effects of scattering (Gurevich, et al., 1997) play very important role in case of finely layered porous rocks and heterogeneous fluid saturation. We have used both fluid flow and scattering effects to derive a frequency-dependent seismic attribute which is proportional to fluid mobility and applied it for analysis of reservoir permeability.