Papers by celestine akifeye udie
Day 2 Tue, August 03, 2021, 2021
Crude oil pollution is a serious threat to both humans and agricultural trends in all ramificatio... more Crude oil pollution is a serious threat to both humans and agricultural trends in all ramifications. The effects include suffocation of humans, plants and other useful organisms in the polluted area. The resultant effect is that it is cost effective and provides an aerated soil environment for enough nutrient distribution. This research designed an effective reagent that has ability to destroy the crude oil molecules in the soil and reviewed highlights for crude oil molecule conversion into soil nutrient. The formulation is based on the principle of complete destruction or combustion of hydrocarbons (crude oil) molecules. The Reagent is called hydrocarbons polluted area sludge solution. The advantage is that the polluted soil is remediated and it is restored after the application of the reagent, with increase in its original fertility. The reagent was applied on a soil polluted by crude oil around Warri Refinery and the result showed a complete destruction of the sludge molecules. I...
Day 3 Wed, August 04, 2021, 2021
The objective is to design a control agent that will induce fluids flow orientation in a reservoi... more The objective is to design a control agent that will induce fluids flow orientation in a reservoir. The specific objectives are to delineate the minimum volumetric rate of the injecting fluid that will orient and control reservoir fluids flow rate and the recovery efficiency. Next estimate the maximum flooding injection rate for high oil recovery and finally predict reservoir fluids recovery efficiency. This work estimates the minimum volumetric rate of the injecting displacing fluid that will displace and control reservoir fluids flow rate and efficiency using mobility ratio. Next it estimates the maximum injection rate of the displacing agent that will recover high oil using summation of the reservoir thickness. Finally, it predicts reservoir fluids flow rates and cumulative oil recovery using unit floodable pore volume and the daily or yearly floodable volume. A cash flow model is used here to describe and compare the revenue (Recovery bill) and the costs (Capex and Opex). The re...
Day 2 Tue, August 03, 2021, 2021
Methods to estimate reserves, recovery factor and time are highlighted using uconventional method... more Methods to estimate reserves, recovery factor and time are highlighted using uconventional method, to reduce the challenges in an oilfield development. General Information about reserves production estimation using long and short production data is collated. The collated data are plotted against time to build production decline curves. The curves are used to estimate the decline rate trends and constants. The decline constant is then used to predict reserves cumulative recovery. The rate trend is extrapolated to abandonment for estimation of reserves initially in place, recovery factor and the correspondent time. The reserves values are compared with field values for accuracy. It was observed that the result using data from long time production history accuracy was 99.98% while evaluation models built with data from short production history accuracy was 98.64%. The models are then adopted after validation. The validated curves are used to build the governing models which are finally...
Day 2 Tue, August 03, 2021, 2021
Commercial accumulation of hydrocarbons occurs mostly in sedimentary rocks due to their high poro... more Commercial accumulation of hydrocarbons occurs mostly in sedimentary rocks due to their high porosity and permeability. Increased global energy demand has necessitated the need for unconventional methods of oil production. The world is gradually moving away from reliability on conventional oils. The need to ensure global energy sustainability has necessitated an urgent diversion to unconventional oils. In recent times, hydrocarbon accumulations have been found in igneous rocks. Their low porosity and permeability however prevents commercial production as oil and gas found in these rocks will not flow. Hydraulic fracturing is useful in increasing rock porosity as it involves the breaking of rocks to allow oil and gas trapped inside to flow to producing wells. This method is useful in developing unconventional resources such as oil and gas found in igneous rocks. This research explores the prospects, challenges and way forward in the use of hydraulic fracturing to increase the porosit...
The use of microbial metabolites by interfacial tension reduction and wettability alteration mech... 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...
The use of microbial metabolites by interfacial tension reduction and wettability alteration mech... 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...
Mathematical models equations were successfully derived for studying reservoirs fluids depletion ... more Mathematical models equations were successfully derived for studying reservoirs fluids depletion from the peak value to an economic value called abandonment. Estimation of Oil and/or Gas Cumulative Production and Initially in Place was done Using Production Decline Rate Trend Analysis. Fields past production data (called regional data) were used to generate standard curves. These curves were empirically used in generating the evaluation model equations. The evaluation model equations were used to project future hydrocarbons production rates in a given time. The projected rates values (called generic or projected data) were also plotted against time, which generated curves that were equally used to obtain the prediction model equations for the estimation of the cumulative hydrocarbons production and the hydrocarbons initially in place. The estimated cumulative hydrocarbons productions were comparable with the respective tank values. The percentage accuracy for gas fields ranged from ...
SPE Nigeria Annual International Conference and Exhibition, 2019
The ‘JEB’ oilfield has been in operation since 1992 with 24 oil producing Wells, 8 water injectio... more The ‘JEB’ oilfield has been in operation since 1992 with 24 oil producing Wells, 8 water injection Wells and no gas injection. From inception, the field was producing at the rate of 27 MSTB/D. The gas produced was 34,333.7 SCF/D which was being flared but later supplied to the Nigeria Liquefied Natural Gas (NLNG) for export. The field had very weak aquifer support and therefore had been water-flooded from early days of its production. With high water cut, it was necessary to find ways of reducing water production and increasing oil production. The study involved field data gathering, history matching of the field data and prediction of future production. Production rates from the different production schemes were simulated for fourteen years. The cumulative oil production of gas injection, water alternating gas (WAG) injection and gas alternating water (GAW) injection schemes were 4.28 MMMSTB, 3.29 MMMSTB and 3.15 MMMSTB respectively representing an incremental recovery of 38%, 6%, and 1%. The cumulative water production of gas injection, WAG injection and GAW injection were 2.65 MMMSTB, 6.52 MMMSTB and 6.90 MMMSTB respectively, which represent 64%, 10% and 5% reduction in produced water. The economic analysis showed gas injection as the best alternative injection scheme for the field with internal rate of return (IRR) of 19.26 %, while the IRR of WAG and GAW injection schemes were 12.09 % and 11.22 % respectively. Also, at 15% discount rate, the gas injection scheme had the best result with a Profitability Index (PI) greater than 1, a positive Net Present Value (NPV) while all other injection schemes had negative NPV and PI was less than one. The possibility of changing a field from water injection to gas injection has been explored, hence, before embarking on any enhanced oil recovery scheme, other alternatives should be evaluated.
Day 3 Wed, August 04, 2021, 2021
: Global energy crisis has been on the increase due to increase on energy demand driven by popula... more : Global energy crisis has been on the increase due to increase on energy demand driven by population growth. In attempting to address the global energy crisis, this work uses the alternative resources to diversify the conventional energy sources in order to supplement the available energy generating sources. Energy resources are being evaluated to supplement the conventional energy sources thereby boosting the total energy generation in a nation. Technical and economic models are developed and used to evaluate the energy values in natural gas fractionation. Natural gas fractions evaluated include liquefied natural gas (LNG), liquefied petroleum gas (LPG) and condensate (liquid fuel). Collated field data are inputted into the developed economic models to estimate feasible technical and economic values in each of the gas fractions. The technical and economic analysis revealed that bulk natural gas contains 85.76% liquefied natural gas, 11.61% liquefied petroleum gas and 2.28% condensate (liquid). The result also revealed that natural gas fractionation improves its economic and energy values. With this, it is clear that the improvement in natural gas energy sources has the potency to supplement, hydro-electric power source, coal power source, oil and/or diesel fuel power sources.
Mathematical models equations were successfully derived for studying reservoirs fluids depletion ... more Mathematical models equations were successfully derived for studying reservoirs fluids depletion from the peak value to an economic value called abandonment. Estimation of Oil and/or Gas Cumulative Production and Initially in Place was done Using Production Decline Rate Trend Analysis. Fields past production data (called regional data) were used to generate standard curves. These curves were empirically used in generating the evaluation model equations. The evaluation model equations were used to project future hydrocarbons production rates in a given time. The projected rates values (called generic or projected data) were also plotted against time, which generated curves that were equally used to obtain the prediction model equations for the estimation of the cumulative hydrocarbons production and the hydrocarbons initially in place. The estimated cumulative hydrocarbons productions were comparable with the respective tank values. The percentage accuracy for gas fields ranged from 99.86% and above, while the percentage accuracy for oil ranged from 98.64% to 99.98%. The models developed for decline rates trends using field data were the basic tools which showed high percentage of accuracy. The advantage of using projectiles and parabolic methods in model development is that such models would be very flexible. The models could be applied with high accuracy right from the initial reservoir stage, through the transient stage and transition stage to the decline rate stage.
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Papers by celestine akifeye udie