About This Item

Share This Item

The AAPG/Datapages Combined Publications Database

Journal of Petroleum Geology

Abstract

Journal of Petroleum Geology, Vol.10, No.1, pp. 101-114, 1987

┬ęCopyright 2000 Scientific Press, Ltd.

MINERALOGICAL AND GEOCHEMICAL STUDIES OF TERTIARY SEDIMENTS Previous HitFROMNext Hit THE EASTERN NIGER DELTA AND THEIR RELATIONSHIP TO PETROLEUM OCCURRENCE

Minapuye I. Odigi*

*Geology Department, Faculty of Science, University of Port Harcourt, PMB 5323, Port Harcourt, Nigeria.


Abstract

Mineralogical and chemical studies have been made of shale cuttings Previous HitfromNext Hit the Akiri-1 well in Oligocene--Miocene sediments of the Niger Delta. The micromillimeter fraction Previous HitfromNext Hit the 2,183 to 3,720m stratigraphic interval was analyzed by X-ray Previous HitdiffractionNext Hit. Kaolinite and chlorite are more abundant than other clay minerals. The illite/smectite composition changes Previous HitfromNext Hit a phase with 32% illite layers, to one with 82% illite layers over the 3,250 to 3,720m stratigraphic interval. Kaolinite decreased in shallow shales Previous HitfromNext Hit 22 to 16% and increases to 29% in deep shales. Quartz increases in abundance with depth, while chlorite and plagioclase feldspar show no systematic trend with depth. Calcite is present in small amounts in all the samples.

Pay-Per-View Purchase Options

The article is available through a document delivery service. Explain these Purchase Options.

Protected Document: $10
Internal PDF Document: $14
Open PDF Document: $24