RE: Thought for the weekend29 Feb 2020 22:40
Trinidad & Suriname
26 Dec 2019 19:04
Oil origins in the Venezuelan, Guyana & Suriname basins started forming in the Jurassic period 150m years ago. At this time Trinidad was closer to Florida than Suriname, and the Caribbean and North Atlantic were a lot smaller than today. Africa and South America were one continent and North America was moving away westwards.
This was the start of the oil fields stretching from Venezuela to Guyana. These fields were gradually covered over with alluvial deposits and are the fields at very deep levels in Trinidad.
About 120m years ago Southern Africa and Southern America started pulling apart , pivoting around Suriname and caused huge forces creating many faults, traps, canyons, thermal forces. The next generation of oil was being formed at this time and 90m years ago Africa had split forming a large channel off the coast of Suriname/ west coast of Africa. This channel was being filled continually with sedimentary deposits covering the source rock with deposits. A big rift had formed to the east of Guayana causing many faults/traps .
The early Jurassic oil had now migrated and been trapped under the Taradejo field in Suriname in the numerous faults, whereas the second generation oil formed in the new waters between Africa/S America. This oilfield was gradually split in 2 off the coasts of Suriname and the west coast of Africa with little on land.
WNZ field has had minor drilling and 2d surveys so little is known, but it is riddled with faults and traps. Any oil is not likely to be connected as it migrated from way down and got trapped
The field is going to need a lot more 2d and 3D surveys to find these traps.
There will probably be less opportunities to find secondary oil.
The forthcoming drilling and EWT will give more insight into the geology of Suriname and WNZ
The oil in WNZ has an API of 16 and is a sweet heavy oil with a low sulphur content