【摘要】 本文从时移地震薄互层油藏监测的本质出发,首先提出并试验了地震尺度下基于边界理论的弹性参数计算方法;其次利用模型资料,定量分析了时移地震常规属性(如最大振幅、最大阻抗等)和累积属性响应地震尺度测量结果与精确测量结果的差异,以及薄层厚度、薄层组合结构、饱和度变化对属性的影响;然后利用实际气田时移地震纵波阻抗反演数据计算累积差异阻抗与累积差异阻抗的平均值,得到气藏压力变化质量因子与气藏压力变化数量因子;最后采用气藏压力变化质量因子与数量因子的交会分析和乘积分析方法实现了对实际薄互层气藏压力变化动态的监测。更多还原

【Abstract】 In our study,we firstly analyze the challenges caused by measurement scale,and present and test the H-S-W bounds theory for computing seismic-scale elastic parameters.Then,based on the model data,we quantitatively compare and ensure the stabilities of traditional attribute and accumulative attributes for time-lapse seismic impedance interpretation with the variations of the formation thicknesses,saturation and reservoir structure.At last,based on the inversed P-wave impedance data from a real gas reservoir,we compute pressure variation quantity factor and quality factor from the accumulative impedance differences and their averages,and ensure the areas of pressure variations in the gas reservoir by their cross-plot and products.更多还原