地震资料振幅谱梯度属性在WC地区储层评价中的应用

Applications of amplitude spectrum gradient for reservoir evaluation in WC project

地震资料振幅谱梯度是指在地震资料有效频带内地震反射波振幅随频率的变化率,它突出了地震资料不同频率振幅的变化特征,更加直观地揭示了储层渗透性能变化特征。本文在综合前人研究成果的基础上,探讨了振幅谱梯度属性的计算方法及其预测优质储层研究思路。并通过应用实例对其技术优势进行了论述,应用结果表明,此方法不仅能预测储层的平面分布,而且能揭示储层储集性能的变化特征。

Seismic amplitude spectrum gradient presents a rate of reflection amplitude versus frequency in the effective band,which highlights variation of seismic data amplitude with different frequency.So it reveals variation of reservoir permeability.The paper discusses computations of amplitude spectrum gradient and its applications for prediction of plane distribution of high-permeability sandstones in WC exploration project.Results show that this approach successfully predicts lithologic traps and structural-lithological compound traps and delineates a series of potential areas.