【摘要】 苏里格气田具有低孔、低渗、低丰度、低饱和度、低压等特点,其有效储层厚度变化大、连续性差、非均质性严重,常规AVO分析方法在该区难以有效区分孔隙流体。针对该问题,根据储层段岩石物理参数与测井资料,研究分析了AVO方法及含不同流体砂岩的AVO响应特征,设计了新的表征纵、横波速度和密度变化率特征的三参量非线性AVO分析方法。实际地震资料分析表明,利用三参量非线性AVO分析方法在苏里格气田取得了良好的应用效果,该方法精度高,能够较准确地预测流体。更多还原

【Abstract】 Sulige Gas-field had the characteristics of low porosity,low permeability,low abundance,low saturation and low pressure,its effective reservoir thickness was greatly changed with poor continuity and serious heterogeneity,conventional AVO analysis method was difficult to be used for distinguishing pore fluid.In allusion to the problem stated above based on reservoir rock physical property and logging data,AVO method and AVO response features containing different sandstones were studied.A new characterization of p-wave and s-wav velocity and density variation characteristics of AVO analysis method was designed.The data analysis indicates that the method of three parameters AVO analysis based on nonlinear relation is used in Sulige Gas-field and good effect is achieved.更多还原