论文标题
使用Marchenko方法在延时地震监测中采用内部倍数
Employing internal multiples in time-lapse seismic monitoring, using the Marchenko method
论文作者
论文摘要
延时地震监测旨在从反射响应变化中解决生产储层的变化。当储层的变化很小时，地震反应的变化可能会变得太小，无法可靠地检测到。从理论上讲，可以使用多种反射来改善旅行时间变化的可检测性：通过储层层向下传播多次的波浪将由于储层变化而发生的时间转移，而不是主要反射。由于我们有兴趣监视非常本地的变化（通常在薄储层层中），因此如果我们可以在整个地下的复杂反射响应中识别与储层相关的内部倍数，那将是有利的。我们引入了一种基于Marchenko的方法，以将这些倍数隔离到完整的反射响应中，并用数值示例说明了该方法的潜力。
Time-lapse seismic monitoring aims at resolving changes in a producing reservoir from changes in the reflection response. When the changes in the reservoir are very small, the changes in the seismic response can become too small to be reliably detected. In theory, multiple reflections can be used to improve the detectability of traveltime changes: a wave that propagates several times down and up through a reservoir layer will undergo a larger time shift due to reservoir changes than a primary reflection. Since we are interested in monitoring very local changes (usually in a thin reservoir layer), it would be advantageous if we could identify the reservoir-related internal multiples in the complex reflection response of the entire subsurface. We introduce a Marchenko-based method to isolate these multiples from the complete reflection response and illustrate the potential of this method with numerical examples.
