岩石物理学
多孔性
地质学
基质(化学分析)
有效孔隙度
含水饱和度
指数
饱和(图论)
断裂(地质)
矿物学
岩土工程
材料科学
复合材料
数学
语言学
哲学
组合数学
作者
Roberto F. Aguilera,Roberto F. Aguilera
出处
期刊:Petrophysics
[Society of Petrophysicists and Well Log Analysts (SPWLA)]
日期:2004-03-01
卷期号:45 (2): 157-166
被引量:61
摘要
The analysis of vuggy and fractured reservoirs has been an area of significant interest in the past few years. Several researchers have studied the characterization of these reservoirs using dual porosity models and have looked for means of estimating values of the dual porosity exponent m for use in calculations of water saturation. There are instances where the reservoir is composed mainly of matrix, fractures and non-connected vugs. In these cases a triple porosity model appears more suitable for petrophysical evaluation of the reservoir. A new technique is presented for these- types of reservoirs that is shown to hold for all combinations of matrix, fracture, and non-connected vug porosities. At low porosities, the fractures dominate and the m values of the composite system tend to be smaller than the porosity exponent of the matrix (m b ). As the total porosity increases, however, the effect of the non-connected vugs becomes more important and m of the triple porosity system can become larger than m b . To the best of our knowledge a solution to the problem associated with the triple porosity exponent has not been addressed previously in the petrophysical literature. This research is inspired by the availability of modem magnetic resonance, micro-resistivity and sonic image tools that permit reasonable characterization of complex reservoirs. The use of the triple porosity model is illustrated with an example.
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