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The AAPG/Datapages Combined Publications Database

Journal of Petroleum Geology

Abstract

Journal of Petroleum Geology, Vol.15, No.1, pp. 71-86, 1992

┬ęCopyright 2000 Scientific Press, Ltd.

EFFICIENCY OF PETROLEUM CONCENTRATION
IN MAJOR PETROLIFEROUS BASINS

K. Magara*

* Faculty of Earth Sciences, King Abdulaziz University, Jeddah, Saudi Arabia.


Abstract

The ratio of the concentration (barrels of oil equivalent/sq. km) of accumulated oil in the richest sedimentary basin to that in the poorest basin, among those basins containing "giant" and "super-giant" fields is more than 500 to 1. By contrast, the ratio of the richest to the poorest petroliferous basin in terms of average organic concentration may be less than 20 to 1. Such a large discrepancy between these two ratios suggests that organic concentration alone cannot account for petroleum concentration in commercial reservoirs, because significant quantities of petroleum may be lost to the surface and be disseminated throughout the sedimentary sequence if the trapping conditions are not suitable. Most of this disseminated petroleum cannot be produced economically using present-day technology.

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