基于叠前资料道集上的远近偏移距属性差异的薄层识别

• 作 者: 陈先红
• 出 处: 油气地球物理
• 发表日期: 2008年04期
• 关键词: 偏移距 叠前 薄层 Widess模型 属性差异 薄层识别 地震分辨率 叠前资料 瞬时属性 超薄层

介绍了一种识别超薄层的新方法。其将Widess模型扩展为偏移距模型,充分利用叠前资料远、近偏移距之间的最大瞬时属性差,拾取出比常规方法拾取的厚度薄得多的超薄层厚度。模型研究显示,远、近偏移距之间的属性差异能够突破Widess模型地震分辨率的限制来识别薄层,从而提高了用叠前资料检测薄层的能力。

A new method of identifying ultrathin layers is introduced. It expands the Widess model to offset model, takes advantage of the maximum instantaneous property difference between the far and near offsets of the prestack data and picks up the ultrathin layer thickness much thinner than the conventional method. The model studies show that the property differences between far and near offsets can overcome the limitations of the Widess model’s seismic resolution to identify thin layers, thereby increasing the ability to detect thin layers using pre-stack data.