在评价地下目标层岩石物理特性时,叠前反射数据分析有着很高的辨别能力。可靠地震响应的恢复非常重要,它严格取决于采集处理步骤,这一点在检验AVO变化时,尤为突出。为了评价不同处理程序的影响,我们检验了海上数据集上三个地震同相轴的AVO响应。井中数据表明,这些同相轴对应于褐砂、气砂及火山渣岩层。AVO分析主要集中在含气砂层反射,尤其是,我们把根据表层一致法取得的标准处理程序结果与针对这种特殊情况的处理程序结果进行了对比。含气砂岩反射波出现AVO下降趋势,这是数据经过标准处理和表层一致法处理的结果。这与理论和实际井中资料正好相反。理论和实际预测的能 Pre-stack reflectance data analysis is highly discriminating when evaluating the petrophysical properties of underground targets. Reliable recovery of seismic response is very important, it depends strictly on the acquisition and processing steps, which is particularly evident when examining AVO changes. To evaluate the effects of different treatments, we examined the AVO response of the three seismic events on a maritime data set. Well data show that these events correspond to brown sand, gas sand and volcanic slag rock formations. The AVO analysis focuses mainly on gas-bearing sand reflections. In particular, we compare the results of standard treatment programs based on the surface agreement with the treatment procedures for this particular case. AVO decline in reflected waves from gas-bearing sandstones is the result of standard and surface-consistent data processing. This is exactly the opposite of the theoretical and actual well data. Theory and actual prediction of energy