Abstract
Bentonitic clay is an important material required during drilling operation in oil and water industry. This study seeks to assess the deposit of the Bentonitic clay characteristics using geophysical techniques and geochemical assessment of the bentonitic clay unit in Afuze. Vertical Electrical Sounding (VES) using Schlumberger electrode arrangement were carried out along six traverses to determine the subsurface lithological characteristics of the area. Representative samples of the bentonitic clay layers were collected for X-Ray fluorescence (XRF) analyses and free swelling index parameters. The geophysical results show an appreciable thickness of the bentonitic clay unit among other stratigraphic units and are well defined based on its resistivity characteristic. The geochemical results show that the clay is a Ca-rich bentonitic type with a relatively low swelling properties and distinct to the Wyoming bentonite type. The Afuze bentonitic clay will be suitable for industrial application as drilling additives if beneficiated to increase the Na content in the clay and enhance its rheological properties for effective use in drilling operations.
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