Outcrop Geology of
Onshore
Brandao, Mario, Carlos Figueiredo, Murthy Inkollu, Sonangol, Luanda, Angola
Exploration efforts are invigorated during this year after 30
years of lull in group
. These are spread in the
north portion of the onshore basin. The current objective is to present outcrop
study of the key reservoirs in Aptian and Albian.
Classic outcrop sections of prominent reservoirs in Aptian and Albian are illustrated
to show the various lithofacies. Clastic,
Shaly and Carbonate facies
are discernible in Aptian Binga
formation. The different
facies thickness is variable
from few millimeters to several meters that represents lagoonal
to near shore deposition. The Albian is known under
several facies. It varies from anhydritic
carbonate (Tuenza), lagoonal
(Catumbela), sub-tidal (Oölitic
Carbonate) and distal depositional (Quissande) facies that vary from few to hundreds of meters in
thickness.
The petrographic, biostratigraphic
and log criteria for Aptian and Albian
section further enhance the knowledge on the key reservoir section.
To sum
up, the
study results of the outcrop section for the key reservoirs in Aptian and Albian will be an
important understanding to the strata of the subsurface in exploration work.