Evaluation of local bentonitic clay as oil well drilling ...
2008-4-1 · Clays of various kinds and grades abound throughout Nigeria's sedimentary basins and on the basement (Dudal, 1965, Carter et al., 1983, Alabo and Odigi, 1989, Aliyu, 1998).Recent investigations by the Nigerian Mining Corporation established the existence of bentonitic clay reserves of over 700 million t in the country, with the largest single deposit at
