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The effect of gravity degradation on low‐speed centrifuge capillary pressure data
Author(s) -
Chen Zhigang Andy,
Ruth Douglas W.
Publication year - 1995
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690410305
Subject(s) - centrifuge , capillary action , capillary pressure , mechanics , degradation (telecommunications) , centrifugal force , gravitational field , chemistry , gravitational acceleration , gravitation , physics , thermodynamics , engineering , classical mechanics , electrical engineering , flow (mathematics) , porous medium , porosity , nuclear physics , organic chemistry
The gravity degradation effect has been identified as a significant physical problem in using centrifuge techniques for determining capillary pressure curves. In 1992, the authors characterized the effect by an angle; however, such an evaluation is simplistic. Here, a new model is constructed to characterize the effect quantitatively. The results with simulated data sets show that there exists a pronounced effect of gravitation on the horizontal centrifugal field in low‐speed experiments (≤ 500 rpm on a standard Beckman centrifuge). Gravity affects the production history for some samples, which leads to inaccurate interpretations of capillary pressure information near the threshold pressure.