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The AAPG/Datapages Combined Publications Database

Journal of Petroleum Geology

Abstract

Journal of Petroleum Geology, Vol.9, No.2, pp. 217-226, 1986

┬ęCopyright 2000 Scientific Press, Ltd.

NEW EVIDENCE FOR A PETROLEUM SOURCE ROCK IN A MIOCENE EVAPORITE SEQUENCE, GULF OF SUEZ, EGYPT

M. M. Kholief and M. A. Barakat*

*Exploration Dept., Egyptian Petroleum Research Institute, Nasr City, Cairo, Egypt.


Abstract

Anhydrite, gypsum and halite evaporites of Middle Miocene age occurring in the Gulf of Suez area constitute more than 50% of the total rock components. They are intercalated mainly with shales and also subordinate carbonate and sandstone layers. Examination of several evaporite samples under both binocular and petrographic microscopes reveals the presence of inclusions of various types hosted by gypsum crystals. Solid inclusions are composed mainly of minute calcareous particles, fine pyrite crystals and residual organic matter, while liquid inclusions, which are more frequent, exist in a uniphase or Previous HitbiphaseTop state. A light hydrocarbon in the form of oil or gas constitutes one of these phases, while the other is a brine. Most of these inclusions are of primary origin and have been developed during the growth of the hosted minerals.

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