Browsing by Author "Mensah, Emmanuel"

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    Evaluation of porosity and permeability of sandstones within the Oti Group of the Volta Basin using petrophysical and petrographic techniques
    (Journal of the Ghana Institution of Engineering, 2023) Zobah, Theresa N.; Adenutsi, Casper D.; Amedjoe, Godfred C.; Wilson, Matthew C; Mensah, Emmanuel; Boateng, Cyril D.; Sarpong, Kwame K.; Opuni, Lydia N. O.; Danuor, Sylvester K.; Karimaie, Hassan; 0000-0002-1721-4158
    This study investigates the reservoir quality of sandstones in the Oti Group of the Volta Basin of Ghana. Geological field mapping, petrographic, petrophysical, mineralogical, and geochemical techniques are used to investigate the reservoir parameters of the sandstones by evaluating the fluid holding and transmission capabilities of the rocks. Results from the comprehensive study identified two sandstone formations of interest; viz. the Bimbila Sandstone and Yabraso Sandstone. Both sandstones were found to be quartz sandstones (sub-arkose and quartz arenites). The Bimbila Sandstones proved to have better porosity and permeability as compared to the Yabraso Sandstones. The Yabraso Sandstone showed porosity between 7-22 % with an average porosity of 13 % (helium gas) and permeability of 63.41 mD, which may be linked to intense cementation and intermediate compaction as well as grain size, shape and arrangement. The Bimbila Sandstones showed better porosity and permeability with a porosity range of 6-24 %, an average porosity of 14 % (helium gas) and 131.80 mD permeability. This is seen to be due to lower compaction supported by framework-stable quartz resulting in a well-connected pore system with high permeability. Further mineralogical data show that the clay minerals present are in minor concentrations. Also, the position of the Yabraso and Bimbila Sandstones in the project area as plotted on the geological map show that there is a close proximity relationship between these sandstones and the limestones; hence forming a conducive system such that if hydrocarbons are produced by the possible source rocks (limestones), they can be housed by the sandstones.
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    The use of mixed media in the production of Metal Art.
    ( March, 2011.) Mensah, Emmanuel
    The focus of this study was to explore and incorporate various artistic and non artistic media into the production of metal art. The researcher was particularly interested in integrating more non metallic materials that are not traditional to the production of metal art in the decoration, finishing and the protective coating of metal art works. Basic hand forming techniques including raising, chasing and repoussé, piercing and soldering were employed in the execution of the works. Other techniques such as painting, dyeing and macramé were also used. Non metallic media that were used in the production of the works included leather, nail polish, acrylic paint, epoxy, formica glue, graphite, eye pencil, lagging, foam, wood, shoe polish, shoe lace, eggshell paper, spray paint, cotton cords and correction fluid. It was discovered that non metallic media could successfully be integrated into the production of metal art thus diversifying the course of traditional metal art in Ghana particularly in KNUST.