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Book Chapter

Hydrodynamic Interpretation of Mid-Continent

By
T. G. Larson
T. G. Larson
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Published:
January 01, 1971

Abstract

Gross, generalized potentiometric maps have been made from pressure data from the Pennsylvanian and Ordovician Systems of the Mid-Continent (Figs. 32, 33). Potentiometric maps, used in conjunction with the strati- graphic-production maps of these systems, help to show why the hydrocarbons exist where they have been found and why other areas are not productive. Also, areas which appear favorable on the basis of hydrodynamics but are not producing may need further study and testing.

The study area, being east of the Continental Divide, has an overall pattern of eastward hydrodynamic flow from intake areas near the mountains toward discharge areas on the east. In most of the Mid-Continent, normal hydro- dynamic flow gradients from these intake or recharge points gradually lose potential toward the discharge areas, where the potential is at a minimum. A notable exception to this general pattern is in the Anadarko basin, where pressure is abnormally high. In this basin, thick shaly sequences of Pennsylvanian strata and older low-permeability rocks contain abnormally pressured fluids. There is a pressure gradient away from the areas of greatest abnormal pressures. The present pressures are probably in equilibrium with the resistance to flow in these low-permeability strata.

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Contents

AAPG Memoir

Future Petroleum Provinces of the United States—Their Geology and Potential, Volumes 1 & 2

Ira H. Cram
Ira H. Cram
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American Association of Petroleum Geologists
Volume
15
ISBN electronic:
9781629812236
Publication date:
January 01, 1971

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