FORAMINIFERA ABUNDANCE PATTERN AND DEPOSITION

ABSTRACT

162 samples were collected from OG-1 Well from depth 345ft – 10355 ft, in the Northern Delta depobelt, with the aim of establish the paleodepositional environment of sedimentary succession penetrated by the drill on OG-1 well. The age of the sediments was from Eocene to Miocene. There was little to no foraminifera between depth 345-4365 ft, an abundance of foraminifera was recorded from depths 4456-7500 ft, with depth 8050ft recording the highest foraminifera abundance of 1011. Planktonic foraminifera were found majorly from depth 4644-7500 ft with depth 5484 recording the highest foraminifera, of 280. Above depth 4644ft Planktonic was very scarce and absent from over 90% of this depth range. A maximum flooding surface was encountered and a sequence boundaries and the depositional environment was shelf environment. Majority of foraminiferas type found between depth 4065ft and 10355ft was Type Sc and it alternated with Type CU foraminifera all through.