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Chapter from:
AAPG Memoir 71 : Reservoir Characterization-Recent Advances
Edited by Richard A. Schatzinger and John F. Jordan
Copyright 
1999 by The American Association of
Petroleum Geologists. All rights reserved.
Memoir 71, Chapter 9: Well Test Imaging--A New Method for Determination of Boundaries from
Well Test Data , by Bruce A. Slevinsky , Pages 127 - 148
Chapter 9
Well Test Imaging--A New Method for Determination of Boundaries
from Well Test Data
Bruce A. Slevinsky
Petro-Canada
Calgary, Alberta, Canada
ABSTRACT
A new method has been developed for analysis of well test data that allows the direct
calculation of the location of arbitrary reservoir boundaries detected during a well test.
The method is based on elements of ray tracing and information theory, and is centered on
the calculation of an instantaneous "angle of view" of the reservoir boundaries.
In the absence of other information, the relative reservoir shape and boundary distances
are retrievable in the form of a diagnostic image. If other reservoir information, such as
3-D seismic, is available, the full shape and orientation of arbitrary (non-straight-line
or circular arc) boundaries can be determined in the form of a reservoir image. The well
test imaging method can be used to greatly enhance the information available from well
tests and other geological data, and provides a method to integrate data from multiple
disciplines to improve reservoir characterization. This paper covers the derivation of the
analytical technique of well test imaging and shows examples of application of the
technique to a number of reservoirs.
