Modelling a real-world buried valley system with vertical non-stationarity using multiple-point statistics | Modélisation d’un système réel de vallée enfouie avec des non-stationnarités verticales à l’aide des statistiques à multiples points Modelización de un sistema real de valles enterrados con la no estacionariedad vertical utilizando las estadísticas de puntos múltiples 通过多点统计法采用垂直非平稳性模拟真实世界的埋藏河谷 Modelagem de um sistema de vales subterrâneos do mundo real com não-estacionariedade vertical utilizando estatística multiponto
2017
He, Xiulan | Sonnenborg, Torben O. | Jørgensen, Flemming | Jensen, Karsten H.
Stationarity has traditionally been a requirement of geostatistical simulations. A common way to deal with non-stationarity is to divide the system into stationary sub-regions and subsequently merge the realizations for each region. Recently, the so-called partition approach that has the flexibility to model non-stationary systems directly was developed for multiple-point statistics simulation (MPS). The objective of this study is to apply the MPS partition method with conventional borehole logs and high-resolution airborne electromagnetic (AEM) data, for simulation of a real-world non-stationary geological system characterized by a network of connected buried valleys that incise deeply into layered Miocene sediments (case study in Denmark). The results show that, based on fragmented information of the formation boundaries, the MPS partition method is able to simulate a non-stationary system including valley structures embedded in a layered Miocene sequence in a single run. Besides, statistical information retrieved from the AEM data improved the simulation of the geology significantly, especially for the deep-seated buried valley sediments where borehole information is sparse.
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