Contourites4 Mar 2019 13:35
Really interesting document which is based on Contourites and Turbidites offshore Brazil which has made me think of the new work program. We all know the west coast of Africa is thought to mirror Brazil. Remembering this work is geared for PEL 29, it does give an insight to the potential in PEL 94.
The purpose of this article is to show that bottom currents played a fundamental role in reworking and redistributing turbidite sands. Marginally derived coarse-grained and thick-bedded turbidite sands were trapped in delta-fed slope channels, structurally controlled depressions (intraslope basins) and channel-terminus lobate features. Fine-grained sediment transported in suspension by turbidity currents was almost entirely removed by bottom currents during and immediately after deposition and transported northward, away from their turbidite feeder systems, to form spectacular fields of fine-grained and very well sorted contourite low-relief sand drifts, characterized by very distinctive facies in cores, which are highly prolific oil reservoirs (e.g., Barracuda, Marlim sul, Albacora leste). Bottom currents were flowing toward the northeast quadrant along the slope, following pathways locally controlled by bottom topography generated by salt mobility, growth faults, and basement block-faulting.
Here are a couple of the conclusions.
SANDY CONTOURITES OCCUR AS EXTENSIVE DEPOSITS WITH GREAT LATERAL CONNECTIVITY
SANDY CONTOURITES CAN REACH SEVERAL HUNDREDS OF METERS IN THICKNESS, AS SEEN IN SANTOS AND CAMPOS BASINS.
http://www.searchanddiscovery.com/pdfz/documents/2015/51069mutti/ndx_mutti.pdf.html
'Studying the ages and movements of faults so that the risk associated with these can be better estimated'
As far back in 2013 GBP mentioned carbonate platform build-ups on large horst blocks and putting 2 +2 I assume these are included in the structural traps mentioned?