Page 83 - Reservoir Formation Damage
P. 83
Chapter 4
Petrophysics-Flow
Functions and
Parameters
Summary
A review of the petrophysical properties involving formation damage
is presented in this chapter.
Introduction
The distribution and behavior of multiphase fluid systems in petroleum
reservoirs are strongly influenced by the petrophysical properties of
sedimentary formations. Ucan et al. (1997) state: "Petrophysical properties
of multiphase flow systems in porous rock are complex functions of the
morphology and topology of the porous medium, interactions between
rock and fluids, phase distribution, and flow pattern and regimes. The
effect of these properties on the flow behavior is lumped in the form of
empirically determined relative permeability and capillary pressure func-
tions which are used as the primary flow parameters for the macroscopic
description of multiphase flow in porous media."
During formation damage, petrophysical properties vary due to rock,
fluid, and particle interactions. Therefore, dynamic relationships are
required to take the varying petrophysical properties into account in
predicting the fluid behavior during formation damage. This chapter
presents a review of the primary petrophysical properties that influence
the fluid behavior and formation damage in petroleum reservoirs.
Wettability Alteration
Kaminsky and Radke (1997) stated that the wettability of reservoirs
is "loosely defined as the preferential affinity of the solid matrix for either
the aqueous or oil phases."
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