Page 104 - Principles of Applied Reservoir Simulation 2E

Overview of the Modeling Process

The process of applying a reservoir flow simulator to the study of a
physical system is outlined here. The best technology for making reservoir
performance predictions today is to model fluid flow in porous media using
computer programs known as simulators.

10.1 Basic Reservoir Analysis

Reservoir characterization and reservoir engineering evaluations are
usually performed as a part of standard business practice independent of a
reservoir simulation study. The tasks associated with basic reservoir analysis
are described in Chapter 2 and in such references as Craft, et al. [1991], Mian
[1992], and Tearpock and Bischke [1991]. They provide information that is
needed to prepare input data for a simulation study. For example, material
balance studies require the acquisition of fluid property data, field pressures, and
production volumes. This information is also needed to conduct a model study
using a reservoir simulator. Volumetric analyses provide independent appraisals
of reservoir volume that can be used to check the original fluid volumes
calculated by a reservoir model. In addition, basic reservoir analysis can provide
an initial concept of the reservoir and associated drive mechanisms. These
concepts can be used to design the model study. The modeling team needs to
be aware of existing studies and should relate model performance to previous
studies whenever possible.

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