Development of secondary
porosity in deep depth reservoirs: Review and application on Jurassic samples from Western
Desert, Egypt.
Al Moataz B. Hassouba
Gulf of Suez Petroleum Co., Cairo, Egypt |
This work is based on several examples quoted in literature about the presence of good
porosities at deeper depths than ever believed possible. Also, comparison is made between
the petrographic criteria recorded in Jurassic samples from the Western Desert, Egypt, and
what has been reported in literature. Possible early hydrocarbon migration to Jurassic
reservoir, at about 4270 m (14,000 ft) is also considered. The average recorded porosity
obtained from the study of the Jurassic samples at 4270 m (14,000 ft) was plotted using
Nagtegall's curve and extrapolating the porosity value to a depth of 6100 m (20,000 ft).
From all these, it is suggested that porosity ranging between 14% and 8% could be present
at a deeper depth where Jurassic reservoir is believed to be encountered in Abu Gharadig
basin, Western Desert.
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