Method of characterizing the distribution of the absolute permeability of a heterogeneous sample
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United States of America Patent
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Apr 6, 2010
Grant Date -
Jun 12, 2008
app pub date -
Nov 30, 2007
filing date -
Dec 1, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
storage of determining the three-dimensional distribution of the absolute permeability of a heterogeneous sample. The method includes: determining a 3D porosity map of the sample; carrying out a viscous miscible displacement experiment during which the evolution of the differential pressure on either side of the sample is determined; from this evolution, determining a 1D absolute permeability profile along the sample and constructing a first 3D permeability map from the 3D porosity map; estimating a simulated differential pressure by simulating numerically a viscous miscible test from the first permeability map and from the 1D permeability profile; determining the three-dimensional distribution of the absolute permeability of the sample by modifying at least once the first permeability map so as to minimize the difference between the simulated differential pressure and the differential pressure measured over the course of time.
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