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arXiv 2003.10738physics.geo-ph
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利用Marchenko方法在时移地震监测中使用内部多次波

Employing internal multiples in time-lapse seismic monitoring, using the Marchenko method

Kees Wapenaar, John van IJsseldijk

摘要:

时移地震监测的目的是从反射响应的变化中分辨出生产储层的变化。当储层中的变化非常小时,地震响应中的变化可能变得太小而不能可靠地检测。理论上,多次反射可以用来提高走时变化的可检测性:通过储层上下传播多次的波将由于储层变化而比一次反射经历更大的时移。由于我们对监测非常局部的变化(通常在薄储层中)感兴趣,如果我们能够在整个地下的复杂反射响应中识别与地层相关的内部多次波,那将是有利的。我们介绍了一种基于马尔琴科的方法来隔离这些多次波从完整的反射响应,并说明了这种方法的潜力与数值例子。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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