NUMERICAL TOOL FOR THE EVALUATION OF TWO PHASE DISPLACEMENTS IN POROUS MEDIA USING COMPUTERIZED TOMOGRAPHY
Published 2017-10-06
Keywords
- Computerized tomography of rocks,
- two-phase displacement,
- improved recovery,
- numerical algorithms
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Abstract
The annual production of crude oil in Colombia has increased, from year to year, to 367 million barrels per year and a proven reserve of 2002 million barrels in 2016. This is due to the intensified production of mature, and heavy crude, oil fields and the use of Enhanced Oil Recovery Techniques (EOR). These seek to reduce the saturation of crude oil in a reservoir by injecting fluids such as solvents, polymers, steam and air, mainly. The percentage of recovery in Colombia achieved with EOR techniques is close to 21%. However, its effectiveness depends on: the characteristics of the oil present in the reservoir, the thrust mechanism prevailing in this, pressure, and temperature, in addition to the petrophysical properties of the rock that forms the reservoir. This work deals with the estimation of the dynamic petrophysical properties of rock samples from the producer horizon using Computed Tomography (CT). For this, a set of five numerical algorithms is proposed for the estimation of the effective porosity, saturation, forward front, trapped volume, and recovery factor during the displacement of two liquids, crude and water, inside the porous medium. The purpose of the dynamic characterization using CT is to understand and analyze the parameters that influence the success of crude oil displacement in a porous medium as part of an improved production scheme in mature, and heavy crude, oil fields.
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