Calculation of Capillary Pressure Using Well Log Data

Abstract

Abstract: In order to explain the abnormal water production behaviors of some oil wells in bottom water drive reservoir, a simple and practical method is introduced to obtain exponential model of capillary pressure from log interpretation data by statistics and regression. The relationship between capillary pressure and water saturation is established based on the assumption that the height of water rise in a single capillary is equivalent to the height of log samples above the bottom of oil-water transition zone. The method is useful when there is relative permeability data while capillary pressure test data are unavailable. The application of the model results in better match of water breakthrough time and water production performance.

Key words: capillary pressure, log interpretation, reservoir simulation, bottom water, coning

CLC Number:

P631.84

WU Zeng-gui, WU Yong-bing, ZHANG Yi-tang. Calculation of Capillary Pressure Using Well Log Data[J]. Xinjiang Petroleum Geology, 2007, 28(5): 607-608.

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Calculation of Capillary Pressure Using Well Log Data

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