Page 233 - Principles of Applied Reservoir Simulation 2E

Chapter 22

History Matching and Predictions

The history match is now well under way. The models discussed in the
exercises of Chapter 21 are conceptual models designed to provide you with a
sense of how fluids move in the reservoir. This is the art of modeling. As you
work with various models of the reservoir, you should begin to develop a
knowledge base for determining how changes to model parameters will help
achieve a match for a particular observable. This knowledge base is valuable
as you develop your feel for the study.
The previous chapters set the stage for preparing a 3D model of the case
study reservoir. A 3D model should provide enough reservoir definition to let
us make meaningful performance predictions. Before matching the 3D model,
we discuss how to incorporate well information into the model. Once the well
model has been prepared, we proceed to history matching and performance
predictions.

22.1 Well Model Preparation

Well model calculations require estimates of productivity index and
flowing bottomhole pressure. These calculations are illustrated here.

Productivity Index Estimate
Well model calculations in WINB4D need to have the quasi-stationary
productivity index factor (PID) specified by the user. PID is estimated from the
expression (Chapter 30)

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