Method and application of coal reservoir permeability prediction based on maximum principal curvature
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摘要: 阐述了最大主曲率法用于煤层气藏储层裂缝渗透率预测的原理，运用三维地震沿层最大主曲率属性对构造裂缝进行了预测。通过分析裂缝间距、构造最大主曲率值、岩层厚度及渗透率之间的相关关系，建立了基于最大主曲率的煤储层渗透率计算模型，该模型对某区煤层气渗透率预测的结果与测井和实验室岩心分析结果吻合较好，表明基于最大主曲率的煤储层渗透率预测方法在煤层气藏裂缝渗透率预测中的可行性和合理性。Abstract: The paper introduced the principle of the application of coal reservoir permeability prediction method based on maximum principle curvature attribute of 3D seismic and predicted the structural fractures by using maximum principal curvature attribute of 3D seismic along layer. Through analyzing the mathematical function relation of the fracture interval, principle curvature, coalbed thickness and the fracture permeability, the calculation model of coal reservoir permeability prediction based on maximum principle curvature has been established. The permeability values derived from maximum principle curvature has fit well to the permeability values derived from well logs and coal samples. This study has shown that the permeability prediction method based on maximum curvature is feasible and effective to predict the coal reservoir permeability.
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Keywords:
- maximum principle curvature /
- coalbed methane /
- coal reservoir /
- fracture permeability /
- 3D seismic
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