Channel detection in 3-D seismic data using sweetness
Channel detection in 3-D seismic data using sweetness
复制标题
DOI：
10.1306/02050807127
复制
发表时间：
2008-06
期刊：
影响因子：
3.5
通讯作者：
B. Hart
中科院分区：
文献类型：
--
作者：
B. Hart
甜度是一种地震属性，特别是与相干性结合使用时，对深水碎屑岩和沿海平原环境中的河道检测非常有用。虽然这个属性不是新的，但以前关于它的实用性和派生的文档大多缺乏。在这篇文章中，我提出了图像的通道从三维地震体，得出使用甜，并讨论了物理基础的属性。此外，这里提出的建模表明，甜度可以用半定量的方式来预测通道系统中的净毛比。通过将反射强度除以瞬时频率的平方根来导出甜度。这种数学定义捕捉了地震解释人员多年来一直使用的属性关系：页岩层系中的孤立砂体往往比周围的页岩产生更强、更宽的反射。当砂和页岩之间的声阻抗对比较低或砂和页岩高度互层时，甜味对于通道检测变得不太有用。
Sweetness is a seismic attribute that, especially when used in conjunction with coherency, can be very useful for channel detection in deep-water clastic and coastal-plain settings. Although the attribute is not new, previous documentation of its utility and derivation has been mostly lacking. In this article, I present images of channels from three-dimensional seismic volumes that were derived using sweetness, and discuss the physical basis of the attribute. Furthermore, the modeling presented here suggests that sweetness could be used in a semiquantitative way to predict net-to-gross ratio in channel systems. Sweetness is derived by dividing reflection strength by the square root of instantaneous frequency. This mathematical definition captures attribute relationships that seismic interpreters have been using qualitatively for many years: isolated sand bodies in shale successions tend to generate stronger, broader reflections than the surrounding shale. Sweetness becomes less useful for channel detection when acoustic impedance contrasts between sands and shales are low or when sands and shales are highly interbedded.