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Book Chapter

Primary Migration Agents

By
Kingi Magara
Kingi Magara
Ohio State University Columbus, Ohio
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Published:
January 01, 1978

Abstract

Four possible causes of primary hydrocarbon migration are: (a) forces resulting from sediment compaction (movement of compaction water); (b) aquathermal effect (water expansion owing to increasing temperature); (c) osmotic effect because of variation of formation-water salinity caused by ion filtration by shales; and (d) montmorillonite-illite conversion (montmorillonite dehydration). The relative importance of these causes may be related to another problem--the form of oil and gas at primary migration stage, that is, whether it is in solution in water or in its own phase.

A larger proportion of migrating oil must be in its own phase because of the relatively low solubility; most of the migrating gas must be in solution in water.

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Contents

AAPG Continuing Education Course Notes Series

Physical and Chemical Constraints on Petroleum Migration

William H. Roberts, III
William H. Roberts, III
Gulf Research and Development
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Robert J. Cordell
Robert J. Cordell
Cordell Reports, Inc.
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American Association of Petroleum Geologists
Volume
8
ISBN electronic:
9781629811970
Publication date:
January 01, 1978

GeoRef

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