Numerous studies have been carried out on diesel as base fluid in oil-based drilling fluids, and have concluded that diesel oil-based mud is highly environmentally unfriendly and expensive to dispose. One of the ways to avoid these... more
Numerous studies have been carried out on diesel as base fluid in oil-based drilling fluids, and have concluded that diesel oil-based mud is highly environmentally unfriendly and expensive to dispose. One of the ways to avoid these problems while keeping the advantages of oil-based muds is to substitute diesel in muds with environmentally friendly oils, such as Jatropha oil.This study examined the rheological properties of Jatropha oil based mud in the presence of sodium chloride and potassium chloride salts, and at increasing temperature of the muds. The results showed that salinity and temperature have negative effects on flow properties of oil-based drilling fluids. It also showed that jatropha oil based mud exhibits less adaptability than diesel oil based mud under high salinity and temperature condition, hence there is the need to improve the rheological properties of jatropha oil based mud under this condition. Finally it was revealed that Jatropha oil-based mud possesses grea...
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ABSTRACT
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Effective Research Collaboration between the University and Industry (U-I) plays a very important role in pushing the frontiers of knowledge and developing new technologies thereby making them powerful engines for innovation and economic... more
Effective Research Collaboration between the University and Industry (U-I) plays a very important role in pushing the frontiers of knowledge and developing new technologies thereby making them powerful engines for innovation and economic growth. Some developed economies have achieved a long-standing tradition of collaboration between universities and industry which maintains a pool of subject-matter specialists within the academic community, ensuring handy solutions to emerging industry challenges, among other benefits. However in Nigeria, there is a growing gap between the academia and the industry. This may have contributed to the low rating of graduates from Nigerian universities in terms of technical competence, as many of the students’ research engagements are not tied to the industry. This paper therefore aims to examine and evaluate the status of research collaboration that exists among petroleum engineering, geosciences schools and the oil industry, and recommendations to re...
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Sulphur compounds are considered as the most hazardous non-hydrocarbons in reservoir fluids, because of their corrosive nature, deleterious effects of petroleum products and tendency to plug porous medium which may impair formation... more
Sulphur compounds are considered as the most hazardous non-hydrocarbons in reservoir fluids, because of their corrosive nature, deleterious effects of petroleum products and tendency to plug porous medium which may impair formation productivity. Precipitation and deposition of elemental sulphur within reservoirs, near well bore region may significantly reduce the inflow performance of sour-gas wells and thus affect economic feasibility negatively. Studies have sought that almost all deep sour reservoirs precipitate elemental sulphur either occurring as a result of decomposition of H2S to give elemental sulphur or occurring as indigenous usually referred to as native sulphur as a dissolved species. Uncontrollable elemental sulphur induced formation damage has been one of the profit hurting syndromes that occurs in deep water sour gas reservoir. Meanwhile many correlations have been formulated thermodynamically to predict the occurrences of elemental sulphur but little information rel...
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Environmental problems associated with complex fluids in general and diesel oil based mud in particular, are among the major concerns of world communities. Studies have shown that diesel oil based mud is highly environmentally unfriendly... more
Environmental problems associated with complex fluids in general and diesel oil based mud in particular, are among the major concerns of world communities. Studies have shown that diesel oil based mud is highly environmentally unfriendly because of its deleterious effects on the environment and expensive to dispose. For these reasons, it is imperative to promote and propagate the use of environmentally friendly mud for drilling operation.This study investigates the drilling cutting carrying capacity of both jatropha and diesel based drilling muds. It also examines the effect of contaminants on the rheological properties of the muds. The properties measured are Plastic Viscosity, Yield Point, Apparent Viscosity, Mud Weight, Gel strength.The results obtained show that cuttings have detrimental effects on rheological properties of both muds by increase in filter cake thickness, loss circulation, struck pipe and operational cost, hence reduction in drilling efficiency. It also showed th...
As the search for natural gas becomes increasingly high due to its high demand worldwide, the oil and gas industry is faced with the challenge of liquid loading in gas or condensate wells. It is imperative to properly design and predict... more
As the search for natural gas becomes increasingly high due to its high demand worldwide, the oil and gas industry is faced with the challenge of liquid loading in gas or condensate wells. It is imperative to properly design and predict the operational parameters necessary for handling flow assurance challenges due to simultaneous flow of gas with liquid. The model of Guo et al is the most recent systematic approach for predicting liquid loading in gas well. However, it did not account for the accumulation and kinetic terms in the momentum energy equation used to estimate bottom-hole pressure in a gas/oil/water/solid four phase flowing well. The two neglected terms in Guo et al formulation have significant effects on the gas well operational parameters such as the minimum gas flow rate for preventing liquid loading. This paper presents an improved model that describes a systematic approach for estimating liquid loading in a gas well without neglecting any term in the fundamental mom...
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Research Interests: Business, Chemistry, Conflict, Multidisciplinary, Impact, and 4 morePollution, Resolution, Crude Oil, and Environment
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Structural maps of horizons in four wells containing hydrocarbon bearing zones with tops and bases at subsea depth range of −9,491 to −11,053 ft were produced, showing the trapping mechanism to be mainly fault-assisted anticlinal... more
Structural maps of horizons in four wells containing hydrocarbon bearing zones with tops and bases at subsea depth range of −9,491 to −11,053 ft were produced, showing the trapping mechanism to be mainly fault-assisted anticlinal closures. Petrophysical parameters, time–depth structure, and isopach maps were obtained. The result indicated that the total net volume of the reservoirs yielded oil-in-place of 41.54
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... Sample collection and preparation 3.2. Rheological characterization 3.3. ... 1. Map of Nigeria showing bentonitic clay occurrences in the study area (PINDIGA) in Gombe State, Nigeria (Modified from Raw Materials Research Development... more
... Sample collection and preparation 3.2. Rheological characterization 3.3. ... 1. Map of Nigeria showing bentonitic clay occurrences in the study area (PINDIGA) in Gombe State, Nigeria (Modified from Raw Materials Research Development Company Bulletin (RMRDC), 2005). ...
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... of Canadian Petroleum Technology. [11] El-Marhoun, MA, Osman, EA,:Using Artificial Neural Networks to develop New PVT Correlations for Saudia Arabia Crude Oil, SPE78592, October 2002. [12] El-Sharkawy, AM: Modeling ...
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... more
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.
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Page 1. 24 Int. J. Oil, Gas and Coal Technology, Vol. 2, No. 1, 2009 Copyright © 2009 Inderscience Enterprises Ltd. Development of empirical correlations for predicting formation of gas hydrate Olusegun Omole, Olugbenga A. Falode* and A.... more
Page 1. 24 Int. J. Oil, Gas and Coal Technology, Vol. 2, No. 1, 2009 Copyright © 2009 Inderscience Enterprises Ltd. Development of empirical correlations for predicting formation of gas hydrate Olusegun Omole, Olugbenga A. Falode* and A. Olatunde Arinkoola ...
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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... more
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
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... mail: adesinafadairo@yahoo.com *Corresponding author Olugbenga Falode Department of Petroleum Engineering, University of Ibadan, Ibadan, Nigeria E-mail: falodelias@yahoo.com Abstract: Formation and deposition of ...
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Copyright 2008, Society of Petroleum Engineers This paper was prepared for presentation at the CIPC/SPE Gas Technology Symposium 2008 Joint Conference held in Calgary, Alberta, Canada, 1619 June 2008. This paper was selected for... more
Copyright 2008, Society of Petroleum Engineers This paper was prepared for presentation at the CIPC/SPE Gas Technology Symposium 2008 Joint Conference held in Calgary, Alberta, Canada, 1619 June 2008. This paper was selected for presentation by an SPE program ...
Copyright 2009, SPE/IADC Middle East Drilling Technology Conference & Exhibition This paper was prepared for presentation at the SPE/IADC Middle East Drilling Technology Conference & Exhibition held in Manama, Bahrain, 26-28... more
Copyright 2009, SPE/IADC Middle East Drilling Technology Conference & Exhibition This paper was prepared for presentation at the SPE/IADC Middle East Drilling Technology Conference & Exhibition held in Manama, Bahrain, 26-28 October 2009. This paper was selected for ...
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Copyright 2010, Society of Petroleum Engineers This paper was prepared for presentation at the 2010 SPE International Symposium and Exhibition on Formation Damage Control held in Lafayette, Louisiana, USA, 1012 February 2010. This paper... more
Copyright 2010, Society of Petroleum Engineers This paper was prepared for presentation at the 2010 SPE International Symposium and Exhibition on Formation Damage Control held in Lafayette, Louisiana, USA, 1012 February 2010. This paper was selected for ...
As the search for natural gas becomes increasingly high due to its high demand worldwide, the oil and gas industry is faced with the challenge of liquid loading in gas or condensate wells. It is imperative to properly design and predict... more
As the search for natural gas becomes increasingly high due to its high demand worldwide, the oil and gas industry is faced with the challenge of liquid loading in gas or condensate wells. It is imperative to properly design and predict the operational parameters necessary for handling flow assurance challenges due to simultaneous flow of gas with liquid. The model of Guo et al is the most recent systematic approach for predicting liquid loading in gas well. However, it did not account for the accumulation and kinetic terms in the momentum energy equation used to estimate bottom-hole pressure in a gas/oiVwater/solid four phase flowing well. The two neglected terms in Guo et al formulation have significant e ffects on the gas well operational parameters such as the minimum gas flow rate for preventing liquid loading. This paper presents an improved model that describes a systematic approach for estimating liquid loading in a gas well without neglecting any term in the fundamental mom...
Dealing with potentially vast and serious environmental incidents has remained a challenge for the Oil and Gas Industry, thus, the aftermath of April 20, 2010, Macondo disaster, deserves a holistic overview of events responsible for, or... more
Dealing with potentially vast and serious environmental incidents has remained a challenge for the Oil and Gas Industry, thus, the aftermath of April 20, 2010, Macondo disaster, deserves a holistic overview of events responsible for, or associated with, the disaster. The study adopted and adapted the HACCP analysis and drew lessons by not only identifying and tracing the immediate and remote causes of the spill but also making appropriate recommendations on prevention and remediation measures to be adopted at similar operating points in the Gulf of Guinea area, like Shell's Bonga FPSO facility and Chevron's Agbami. Using detailed extrapolation as a basis for the establishment of material conditionalities and similarities existing between the Gulf of Mexico and the Gulf of Guinea, the study was conducted with the aid of an extensive and exhaustive review of literature, technical reports, and other de-classified materials to determine, amongst other things, the how, why and le...
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Flow assurance is a major concern to the petroleum industry, characterised by the numerous technical problems related to the dynamic nature of the produced effluents or by-products. These problems change gradually throughout the... more
Flow assurance is a major concern to the petroleum industry, characterised by the numerous technical problems related to the dynamic nature of the produced effluents or by-products. These problems change gradually throughout the field's life, periodically requiring adjustment of the solution. To mismanage is not only costly but can be devastating to the economics of a field. Flow assurance has been an emerging multidisciplinary subject addressing the hydrocarbon production from offshore fields. The problem of plugging of production lines by hydrates, asphaltenes, paraffin or scales is considered, by operating companies, as one of the major problems in the development of oil/gas fields. This paper systematically presents an analytical model developed for predicting productivity of reservoir with incidence of scale deposition in the vicinity of horizontal wellbore.
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The use of microbial metabolites by interfacial tension reduction and wettability alteration mechanisms, for improved oil recovery from oil reservoirs, especially in mature oil fields have always been advocated for as a cheaper and... more
The use of microbial metabolites by interfacial tension reduction and wettability alteration mechanisms, for improved oil recovery from oil reservoirs, especially in mature oil fields have always been advocated for as a cheaper and environmentally-safe method of increasing oil production. Although microbial enhanced oil recovery (MEOR) in some advanced nations have come close to commercial applications, Nigeria is yet to venture into the microbial enhancement of oil recovery. Nigeria as a nation has had its fair share of the global dilemma of decreased oil production caused by unrecovered oil in oil reserves, resulting in adverse effects on its economy energy status. Uncertainties on the efficiency of MEOR in practical reservoirs, failure of petroleum engineers and scientists to form multidisciplinary teams, and lack of adequate understanding of MEOR processes are some factors that have slowed down the process of adopting MEOR as an alternative to other enhanced oil recovery methods...
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Crude oil, a base for more than 6000 products that we use on a daily basis, accounts for 33% of global energy consumption. However, the outbreak and transmission of COVID-19 had significant implications for the entire value chain in the... more
Crude oil, a base for more than 6000 products that we use on a daily basis, accounts for 33% of global energy consumption. However, the outbreak and transmission of COVID-19 had significant implications for the entire value chain in the oil industry. The price crash and the fluctuations in price is known to have far reaching effect on global economies, with Nigeria hard. It has therefore become imperative to develop a tool for forecasting the price of crude oil in order to minimise the risks associated with volatility in oil prices and also be able to do proper planning. Hence, this article proposed a hybrid forecasting model involving a classical and machine learning techniques – autoregressive neural network, in determining the prices of crude oil. The monthly data used were obtained from the Central Bank of Nigeria website, spanning January 2006 to October 2020. Statistical efficiency was computed for the hybrid, and the models from which the proposed hybrid was built, using the ...
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Analysis and investigation of the applicability of Maintenance Assessment/Audit methodology used in a Manufacturing firm was done based on previous maintenance experience on an Oilfield Production Asset (Floating, Production, Storage and... more
Analysis and investigation of the applicability of Maintenance Assessment/Audit methodology used in a Manufacturing firm was done based on previous maintenance experience on an Oilfield Production Asset (Floating, Production, Storage and Offloading Asset – FPSO). The Audit/Assessement Methodology used in PepsiCo International was reported in details and future work to be carried out in in respect of its practical application in Oilfield Production Assets was stated in future work. Comparison and Anlysis were based on (1) Machines and Equipment (2) Processs and (3) Maintenace System/Organisation existing in both industeris (Manufaturing and Oilfield Production Assets). Overall it was found that both industries have very similar characteristics and feautures in areas (1) and (3), with a few similarities shared in (2). It was therefore inferred that the Maintenance Audit Methology adopted in the assessment of PepsiCo International (a manufacturing firm) can equally be adopted in the Ma...
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The minimum miscibility pressure (MMP) is one of the critical parameters needed in the successful design of a miscible gas injection for enhanced oil recovery purposes. In this study, we explore the capability of using the Gaussian... more
The minimum miscibility pressure (MMP) is one of the critical parameters needed in the successful design of a miscible gas injection for enhanced oil recovery purposes. In this study, we explore the capability of using the Gaussian process machine learning (GPML) approach, for accurate prediction of this vital property in both pure and impure CO2-injection streams. We first performed a sensitivity analysis of different kernels and then a comparative analysis with other techniques. The new GPML model, when compared with previously published predictive models, including both correlations and other machine learning (ML)/intelligent models, showed superior performance with the highest correlation coefficient and the lowest error metrics.
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Different gas equilibrium adsorption models (or isotherms) with various theoretical frameworks have been applied to quantify adsorbed volume (V) of gas (or fluid) through pressure-volume behaviour at a constant temperature. Most often,... more
Different gas equilibrium adsorption models (or isotherms) with various theoretical frameworks have been applied to quantify adsorbed volume (V) of gas (or fluid) through pressure-volume behaviour at a constant temperature. Most often, Langmuir isotherm (representing Type I Isotherm) has been used in modelling monolayer adsorption even though it yields over-estimation at higher pressures thus contradicting the description of Type I isotherm. Here, higher pressures refer to pressures above the adsorption saturation pressure(Ps) . Hence, in this work, a new Type I adsorption isotherm involving pressure(P), adsorption saturation pressure(Ps) , maximum adsorbed volume and adsorbate-adsorbent resistance parameter was developed using kinetic approach. The developed adsorption isotherm is V= and it shows that Vmax is attained when pressure increases to Ps , above which no further gas adsorption occurs. The developed isotherm can be used to model all cases of monolayer adsorptions of gas...
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In this paper, discounted cash flow analysis and Monte Carlo simulation were used to evaluate the Gas Power Plant Project for the first Gas Industrial Park in Nigeria. These methods gave maximum insight into the basis for investment... more
In this paper, discounted cash flow analysis and Monte Carlo simulation were used to evaluate the Gas Power Plant Project for the first Gas Industrial Park in Nigeria. These methods gave maximum insight into the basis for investment decision and show the profitability of gas fired generation. A Net Present Value of $10.8 million at a discount rate of 15% and an Internal Rate of Return (IRR) of 16% with a payback period of 9 years was realized. Probabilistic result gave a 62.8% certainty of having a positive NPV and IRR values above the hurdle rate for investment. The capacity factor, capital cost and debt capital were uncertain parameters that will have huge effect on the power project. The study concludes that the gas fired power plant project in the industrial park is economically viable.
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Rheological properties of drilling mud formulated from ten samples of Nigerian clay and treated with sodium carbonate (Na 2 CO 3) were determined. Four different formulations were made: A (22.5 g / 350 ml of mud + 0% Na 2 CO 3), B (22.5 g... more
Rheological properties of drilling mud formulated from ten samples of Nigerian clay and treated with sodium carbonate (Na 2 CO 3) were determined. Four different formulations were made: A (22.5 g / 350 ml of mud + 0% Na 2 CO 3), B (22.5 g / 350 ml of mud + 10% Na 2 CO 3), C (25 g / 350 ml of mud + 10% Na 2 CO 3) and D (28 g / 350 ml of mud + 10% Na 2 CO 3). None of the samples tested in their natural state exhibited remarkable improvement in rheological properties. However, as the concentration of sodium carbonate in 22.5 g / 350 ml of mud increased to 10% in all the samples, the highest percent increase of 525% in shear stress at 1022 s-1 was observed. As clay concentration increased to 25 and 28 g / 350 ml at 10% sodium carbonate concentration, an additional increase in shear stress of 32 and 29% was observed respectively. This resulted in an increase in the apparent viscosity, plastic viscosity and yield point of the mud by 298, 32 and 29% in B, 205, 10 and 7% in C, and 9500, 90 ...
An understanding of the mechanisms by which oil is displaced from porous media requires the knowledge of the role of wettability and capillary forces in the displacement process. The determination of representative capillary pressure (Pc)... more
An understanding of the mechanisms by which oil is displaced from porous media requires the knowledge of the role of wettability and capillary forces in the displacement process. The determination of representative capillary pressure (Pc) data and wettability index of a reservoir rock is needed for the prediction of the fluids distribution in the reservoir: the initial water saturation and the volume of reserves. This study shows how wettability alteration of an initially water-wet reservoir rock to oil-wet affects the properties that govern multiphase flow in porous media, that is, capillary pressure, relative permeability, and irreducible saturation. Initial water-wet reservoir core samples with porosities ranging from 23 to 33%, absolute air permeability of 50 to 233 md, and initial brine saturation of 63 to 87% were first tested as water-wet samples under air-brine system. This yielded irreducible wetting phase saturation of 19 to 21%. The samples were later tested after modifyi...