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The AAPG/Datapages Combined Publications Database
Williston Basin Symposium
Abstract
NDGS/SKGS-AAPG
Second Williston Basin Symposium, April 23,
APPLICATION OF FORMATION TESTING TO HYDRODYNAMIC STUDIES
ABSTRACT
THE APPLICATION OF FORMATION TESTING TO HYDRODYNAMIC STUDIES
The conventional method of petroleum exploration has been to search for structural and stratigraphic traps. It was thought that the surfaces between the water and oil, and between the oil and gas would be essentially horizontal planes. These assumptions will only hold in their entirety if a hydrostatic condition exists in the formation. Under hydrodynamic conditions, i.e., when the water moves through the formation (as is frequently the case), the above surfaces will become inclined and the traps will not necessarily occur at structural "highs".
In this paper, the principles of hydrodynamic studies in relation to petroleum exploration will be briefly reviewed and the basic data for this type of study discussed. The most sensitive of these data are the formation fluid pressure measurements. One of the better methods to obtain pressure measurements is formation testing. The tools of formation testing are briefly discussed with special emphasis on the accuracy of pressures. Suggestions are made to improve the accuracy of pressure measurements, and the interpretation of such pressures.
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