Horst, traps & recent drill5 Mar 2019 19:23
Just look at the Brulpadda-1AX well and it just gets better. Not only did it prove the Aptian from Angola across to as far as South Africa, it has showed the type of successful trap within channel sandstones systems. All Sounds quite familiar!?
A combined stratigraphic/structural closure.
Africa Energy 2019 say
These complexes contain stratigraphically and structurally trapped oil and gas within excellent reservoir quality channel sandstones that form feeders to the outboard Paddavissie Fan Systems.
GBP say
“Global Petroleum’s technical team is both intrigued and highly encouraged by its recent work which has confirmed the Gemsbok prospect, a structural closure extending over 200 square kms. It is unusual to identify such a large, robust structure at prospective depths which does not rely on stratigraphic trapping,” Global Petroleum said.
GBP back in 2013 say
Carbonate platform build-ups on large horst blocks.
Brazil - Horst
The syn-rift (pre-salt) stage of the Namibe Basin is typified by a series of asymmetrical horst and graben basins, in which thick sequences of fluvial-lacustrine sediments were deposited in narrow deep lakes. In analogous formations in Brazil and to the north of these basins, burial of algal blooms and plant detritus, along with anoxic bottom waters lead to the formation of a world-class source rock. Reservoir rocks range from conglomerates and sandstones shed locally from uplifted horst blocks to lacustrine and fluviatile sandstones.
As active rifting ceased in the early Cretaceous, the early post-rift, or sag phase is characterised by the deposition of continental, fluvial and transgressive lagoonal rocks (Teisserenc & Villemin, 1990). On the Brazilian conjugate margin these sag phase sediments have attracted significant commercial interest since the 2006 discovery of the Lula Field (Figure 2). Topography created by the earlier rifted fault blocks provided the structure for the growth of carbonates during this sag phase, which form the main upper reservoir in Lula. The understanding of this structure has led to subsequent discoveries on both sides of the South Atlantic, e.g. the Jupiter Field.
https://www.pgs.com/globalassets/technical-library/tech-lib-pdfs/seg2013_koch_etal_seg2013_prospectivity.pdf