Effect of microbial growth on pore entrance size distribution in sandstone cores

The in situ growth of microorganisms in Berea sandstone cores preferentially plugged the larger pore entrances. The largest pore entrance sizes after microbial plugging ranged from 20 to 38 mu m, compared with 59 to 69 mu m before plugging. The pore entrance size distribution of plugged cores was sh...

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Bibliographic Details
Published in:Journal of Industrial Microbiology 1986-12, Vol.1 (4), p.227-234
Main Authors: Torbati, H. M., Raiders, R. A., Donaldson, E. C., McInerney, M. J., Jenneman, G. E., Knapp, R. M.
Format: Article
Language:English
Subjects:
mathematical models
microorganisms
oil
reservoirs
rocks
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Summary:The in situ growth of microorganisms in Berea sandstone cores preferentially plugged the larger pore entrances. The largest pore entrance sizes after microbial plugging ranged from 20 to 38 mu m, compared with 59 to 69 mu m before plugging. The pore entrance size distribution of plugged cores was shifted to smaller sizes. A mathematical model based on Poiseulle's equation was found to adequately predict permeability reductions (greater than 90%) caused by microbial growth in the large pore entries.
ISSN:0169-4146
1476-5535
DOI:10.1007/BF01569276