Correlation of permeability loss by thermally-induced compaction due to grain expansion

被引:0
作者
Civan, Faruk [1 ]
机构
[1] Univ Oklahoma, Mewbourne Sch Petr & Geol Engn, Norman, OK 73019 USA
来源
PETROPHYSICS | 2008年 / 49卷 / 04期
关键词
porous rock; permeability; compaction; grain expansion; temperature effect; modified-Kozeny-Carman equation; Vogel-Tammann-Fulcher equation; correlation;
D O I
暂无
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
Variation of permeability of porous formations by thermal expansion is formulated by two approaches. The first is mechanistic using a modified-Kozeny-Carman equation by which effect of temperature on permeability is taken into account through variation of porosity and parameters. The second approach describes temperature dependency of permeability by means of the Vogel-Tammann-Fulcher equation considering energy requirement of thermal processes. The validity of these formulations is demonstrated by correlating experimental data for typical diatomite formations. Both approaches render equally good quality correlations in view of present measurement errors and scatter. While the first approach provides an insight into the mechanisms of thermally-induced permeability reduction by grain expansion, the second approach yields information about the activation energy of relevant thermal processes. However, regression of experimental data with the four-parameter modified-Kozeny-Carman equation was found to be more tedious than the two-parameter Vogel-Tammann-Fulcher equation. The formulations presented in this paper have been developed for theoretically-based correlation of experimental data. Nevertheless, the insights gained herein may provide scientific guidance for developing potentially predictive methods.
引用
收藏
页码:351 / 361
页数:11
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