Browsing by Author "Obah, B."

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    Biopolymer substitution and impact on cuttings transport of a lightweight water-based drilling fluid
    (STM Journals, 2017) Uwaezuoke, N.; Onwukwe, S. I.; Igwilo, K. C.; Obah, B.
    The challenges associated with natural gas Pipeline flow assurance is an increasingly important issue as the world supply for natural gas expands, and is expected to rise more strongly to match the global demand for a cleaner energy. Flow assurance challenges in pipelines include hydrate formation, paraffin wax deposition, asphaltene deposition, sand deposits, black powder, and on the wall of pipelines, all of which obstruct the flow of well fluids and associated produced hydrocarbons. This study addressed these flow assurance concerns from a technical view by quantifying the threats and establishing appropriate mitigation schemes, leading to designed solutions and operational procedures. Modeling and simulation approach was adopted to achieve the overall aim. The simulation software tools PVTsim and OLGA were used for both steady state and dynamic states. The phase envelope investigation indicates that the cricondentherm within the constraint of the delivery temperature. The slugging analysis, indicates that hydrodynamic slugging will not be predominant for the pipeline operations at the design flow rate of 30MMscfd along Alakiri – Obigbo, and at 70MMscfd along the Obigbo Tie-in - Intermediate scrap station; as the flow regimes are mainly stratified for both pipeline systems. From the hydrate analysis investigated, after a shutdown period (no-touch time); hydrate threat is envisaged during the shutdown period of the Intermediate scraper trap – ALSCON along pipeline system, since the temperature drops to the hydrate formation temperature.
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    Predictive modeling of Nigerian peak condensate using Hubbert’s zero annual reserve rate
    (Vandana Publications, 2015) Kamalu, C. I. O.; Appah, D.; Obah, B.; Anyanwu, E. E.; Obijiaku, J. C.; Uzondu, F. N.; Okolie, I. J.; Oghome, P.
    In this work, a model was developed using Kamalu’s (2010) natural resource depletion word equation in one hand and Hubbert zero rate of annual reserve concept on the other hand. Experimental data was collected from Nigerian Ministry of Petroleum and Minerals, 7 Kofo Abayomi Street, Victoria Island, Lagos to validate the model. It gave coefficient of correlation of 0.99997 and 0.99517 for discovery and production of Nigerian condensate respectively. It was also established that Nigerian condensate will exhaust in the year 2518 AD when the discovery and production values will be equal to 110MMB. The research reveals that there is a gentle interaction between the cumulative discovery and production and serious interaction between annual discovery and production as years roll by. This work can be used by Nigerian government to plan their condensate budget both nationally and internationally and to cushion their position in OPEC and the world