Palynostratigraphy and Paleoclimate of the Sequences Penetrated by Meren 31 Side Tract-2 Well, Offshore Niger Delta

Peter S Ola,Bamisile K Adewale

doi:10.4236/ijg.2014.510100

Abstract

Palynological study of an offshore well in the Niger delta was carried out to document the palynomorphs assemblage and subsequently date and establish paleoclimatic conditions in a portion of the Niger delta. One hundred and thirty seven cutting samples provided by Chevron Nigeria Plc were composited at 27 m interval for the study. The samples yielded forty six palynomorphs, which include Racemonocolpites hians, Zonocostites ramonae, Monoporites annulatus, Botryococcusbraunii, dinocyst Lycopodiumsporites spp., Pachydermitesdiederixi and Psilatricolporitescrassus. A Middle-Late Miocene age belonging to P800 and P700 zones of Germeraad was established for the interval studied. There were clear crests and troughs in the microfloral abundance indicative of alternations of dry and wet climatic conditions during the deposition of the Agbada Formation.

Highlights

Meren 31st-2 is one of several development wells drilled in Meren field in oil mining lease (OML)-95 of Chevron Nigeria Limited (Figure 1)
A total of one hundred and thirty seven ditch cutting samples used for this study was provided by Chevron Nigeria Plc
The P820 subzone was only recognized within the P800 zone while the P700 is further subdivided into P780 and P770 subzone of [4]

Summary

Introduction

Meren 31st-2 is one of several development wells drilled in Meren field in oil mining lease (OML)-95 of Chevron Nigeria Limited (Figure 1). The well was drilled to a total depth of 2758 m and located on Longitude 4 ̊50'. Latitude 5 ̊58' E (N 193335.92; E 273519.3) in the Western part of Niger Delta, West coast of Africa. Several publications directed towards exploration and exploitation of hydrocarbon abound on this prolific oil field. Recent publications [1] on flow units, connectivity, and reservoir characterization of the field revealed that Meren field consists of complex reservoir architecture characterized by shoreface clinoforms and a history of progradation and retrogradation cycles. A high resolution sequence stratigraphic and reservoir. (2014) Palynostratigraphy and Paleoclimate of the Sequences Penetrated by Meren 31 Side Tract-2 Well, Offshore Niger Delta.

Methods

Discussion

Conclusion