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Articles by O.A. Falode
Total Records ( 2 ) for O.A. Falode
  O.A. Ehinola , O.O. Sonibare , O.A. Falode and B.O. Awofala
  Campano-Maastrichtian Nkporo Shales from the Lower Benue Trough, Nigeria were analyzed to assess their petroleum potential by sedimentological analysis and Rock-Eval pyrolysis. The Nkporo Shale consists of dark grey and highly fissile shale with interbeds of sandy shale, siltstone and mudstone. The Total Organic Carbon (TOC) ranges from 0.54 to 3.01 wt.%. These values exceed the minimum value of 0.5 wt.% usually required for potential petroleum source rocks. Hydrogen indices are relatively low, fluctuating within a small range of 20 and 153 mg HC/g TOC revealing kerogen of type III and mixed III/II organic matter (OM), which is predominantly gas prone. Tmax and Production Index (PI) ranged from 426 to 439 ° C (av. 432 ° C) and 0.02 to 0.08 (av. 0.03), respectively. These values indicated that the shales are presently thermally immature. Analytical parameters determined from the peak shape analysis of S2 pyrolysis curves such as asymmetry (B/A), asymmetry-1 (D/C) and Full Width at Half Height (FWHH) are between 0.64 to 1.18, 0.44 to 0.77 and 60 to 80 ° C, respectively. The broad width of FWHH indicated broad range of activation energy and further confirmed the classification of organic matter contained in Nkporo Shale as Type III. The present study showed that the Nkporo Shale has prospects to generate gas rather than oil at appropriate thermal maturity.
  O. Omole and O.A. Falode
  The ease of formation of emulsions is described for some crude oil systems in which the mixing conditions, oil type, aqueous phase composition and concentration are varied. The most stable emulsions have quality that ranged between 10 and 20% while the least stable have quality that ranged between 50 and 60%. Droplet coalescence was highest at 2 min agitation and below 5000 rpm. Addition of 70% FY crude to BL crude caused 24% emulsion stability increase while a decrease of 50% in emulsion stability was observed upon dilution with hexane relative to toluene. The stability of emulsions is not affected by variation in brine concentration within 100-200,000 ppm range. In general, optimum pH for resolution of alkaline-based emulsions was between 10 and 11 and between 6 and 7 for brine. Finally, the effect of increasing the pH of the aqueous phase is explored. It is shown that, at sufficiently high pH, unstable emulsions were produced while at low pH, stable emulsions were formed.
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