摘要
Lasseter等(1986)提出油藏模型网格粗化(Reservoir Upscaling)应当在表征体元(Representative Elementary Volume,简称REV)级进行。REV指一种特定的体积元,在这种体积元测取的物性参数将在一定的比例尺范围内保持不变。REV理论一直是一个有争议的概念,因为其定义不十分清晰,且没有说明如何在真实油藏中获取之。因此,甚至有人怀疑在真实油藏中,是否真的存在REV。基于REV理论,提出了一个新的概念——表征体元网格,(Representative Elementary Volume Grid,简称REVG)。该网格体系在给定的比例尺范围内可最佳地描述油藏的非均质性。从物理意义上讲,在REVG系统中,每个网格内的物性差异最小,而网格间的物性差异最大。
Lasseter et al. （1986） proposed that scale-up of prtrophysical property should be done from the scale of a representative elementary volume （REV）, a volume for which the measured property does not change with an increase in scale over a given limit of scale. The notion of REV has been a controversial concept because its definition is not clear-cut, and it didn＇t address how to obtain it in real reservoir system. There has even been some argument as to whether REV really exists. This paper, based on the REV concept, proposes the new idea of a REVG （Representative Elemental Volume Grid）. The REVG is applied to best describe the heterogeneity of an original reservoir model for a given scale. Mathematically, in REVG system, the variance of properties will be smallest within each grid, and biggest between grids. REVG is the physical target for upscaling in reservoir simulation.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2007年第3期341-343,共3页
Xinjiang Petroleum Geology
