Emmanuel Ehirim

• PhD
• Engineer at Rivers State University

The performance of petroleum wells, especially, the development wells is very relevant to the petroleum engineer in other to evaluate the target reservoir. To produce efficiently from production wells, it is important to evaluate the performance of the well both on future and present preferences. In this work a partial differential equation model w...

Magnetic nano particles, magnetic nano particles mixed with hydrogen peroxide and 20:10:10 NPK fertilizer were used to remediate two types of crude contaminated soils namely clay and loamy. Functional parameters such as the total petroleum hydrocarbon (TPH) , polycyclic aromatic hydrocarbon (PAH) and microbial count (MC) degradation were determine...

Steam methane reforming is a chemical synthesis for producing syngas (hydrogen and carbon monoxide) from hydrocarbon such as natural gas and is mostly used in ammonia production. To ensure optimal efficiency, the ratio of steam and methane should be high to obtain more of hydrogen needed for ammonia production. A detailed mathematical models were d...

A mathematical model of a flow-by packed bed electrochemical reactor consisting of copper particles and operating under constant current conditions is presented. The mathematical model describes the kinetic behavior of electrochemical reactor and its porosity field modification as a result of electrodeposition occurring in the reactor, when the rea...

Solvent Extraction and Characterization of Vegetable Oil from CUCUMEROPSIS MANNII was considered in this work. Hexane and Ethanol were used as solvent for the extraction process and the desired vegetable oil product obtained from steam distillation process of melon seed through the application of Soxhlet Extractor apparatus. The oil obtained from t...

Heat transfer coefficients of dryers are useful tools for correlation formulation and performance evaluation of process design of dryers as well as derivation of analytical model for predicting drying rates. A model equation for predicting heat transfer coefficient of air in a batch dryer using Buckingham Pi-theorem and dimensional analysis at vari...

The importance of fertilizers cannot be underscored owing to their positive impacts on plants, environment and human health. However, the use of growth and yield enhancers such as NPK fertilizer have been intensively discouraged as the effects on the environment and human health have been devastating. However, the global awareness of the hazardous...

This study considers a vertical well producing initially without sand control technique in sandstone reservoir in the Niger Delta region. The study uses the data and information of two wells and applied PROSPER to numerically quantify the impact of the extra flow restriction caused by the gravel pack and slotted liner systems respectively. Well mod...

This work compared the result of the effect of lemongrass granules as a local raw material in the treatment of crude oil polluted soils when it is in a fresh or dry condition. The comparison of the usage in fresh or dry state is aimed at identifying the most effective among the two conditions that will give the best result in biodegradation of petr...

This work is aimed at examining the use of fresh lemongrass granules as a local raw material in the treatment of petroleum contaminated soils in the Niger Delta Region of Nigeria. Composite soil samples were obtained from Oshiobele Community in Ahoada West Local Government Area of Rivers State at a depth of 15cm using the soil auger while poultry d...

This work is aimed at examining the use of fresh lemongrass granules as a local raw material in the treatment of petroleum contaminated soils in the Niger Delta Region of Nigeria. Composite soil samples were obtained from Oshiobele Community in Ahoada West Local Government Area of Rivers State at a depth of 15cm using the soil auger while poultry d...

In this research, a mathematical model was developed to study the generation of carbon dioxide using oxygen diffusion as a method in bioremediation of petroleum contaminated soils at 100cm depth. The predictability of carbon dioxide concentration by the model was tested in three types of soils: sandy, sandy loam and clay soils, which were polluted...

Drilling operation is becoming increasingly expensive because of the rising cost of drilling fluids and mud additives, which also impact on the environment due to the chemistry of the resulting waste stream. To make drilling operation more profitable while reducing environmental pollution, local waste Tigernut fibre was used as an additive in place...

An algorithm for the estimation of the kinetic parameters using five lump kinetic schemes for Fluid Catalytic Cracking of Vacuum Gas Oil has been developed. The optimization models were also developed using single point regression analysis to predict the pre-exponential function and activation energies. The mathematical models for the riser reactor...

Pressure transient analysis and pressure distribution equations for gas condensate reservoirs have constantly been reviewed over time. This is because several isothermal depletion processes for these extremely pressure-sensitive reservoir systems are not only dependent on production rates but also a function of lithology and reservoir rock orientat...

A dynamic reservoir simulation was performed using Eclipse (PETREL) to investigate the application of sound waterflood design principles to a Niger delta oil field. To ascertain contributions of the different schemes and techniques applied in selecting the best appropriate waterflood design, a case of recovery by natural depletion was first conside...

Design models were evaluated to determine the effect of temperature, pH, pressure, duty and mole fraction of natural gas on the production of 10,000 metric tons per hour of urea. A computer programme (HYSYS) was developed for the entire urea process plant. The results showed that from the separator there is n zero (0) amount urea in the bottom prod...

This study on reservoir characterization was conducted using seismic data and well logs. The aim was to characterize the petrophysical properties and structural element in the field for hydrocarbon volume estimation and determination of infill well locations. Three reservoirs were identified (J100, K100, L100) at shallow, middle and deep depths and...

Pressure drop estimation in natural gas pipelines is of great importance in the natural gas transmission process. Transported natural gas must reach desired destination, at specified pressure and temperature conditions. This work estimates and analyses the drop in pressure during the transportation process. Interest is placed on what leads to press...

This study was conducted to assess the suitability of wasteTigernutfibre as an additive in place of polyanionic cellulose ultra-low (PAC UL) in the formulation of standard water-based potassium chloride (KCl) polymer gel mud. Four mud samples (A, C 1 , C 2 , and C 3)were preparedwith standard industrial KCl polymer gel. Sample A, which served as th...

This study was conducted to assess the suitability of waste Tigernut fibre as an additive in place of polyanionic cellulose ultra-low (PAC UL) in the formulation of standard water-based potassium chloride (KCl) polymer gel mud. Four mud samples (A, C1, C2, and C3) were prepared with standard industrial KCl polymer gel. Sample A, which served as the...

Pages 105-111 105 www.wjir.org  Abstract-This study was conducted to assess the suitability of wasteTigernutfibre as an additive in place of polyanionic cellulose ultra-low (PAC UL) in the formulation of standard water-based potassium chloride (KCl) polymer gel mud. Four mud samples (A, C 1 , C 2 , and C 3)were preparedwith standard industrial KCl...

The aim of this study was to develop a Mathematical model that will predict oxygen concentration at 100cm depth, obtained from oxygen diffusion for bioremediation of petroleum contaminated soils at above mentioned depth. A mathematical model in two dimensional flow(x and z) was developed from basic conservative principle and it was solvednumericall...

This work involves the evaluation of effect of boiler operating temperature and pressure on the performance of steam power plant, a case study of Port Harcourt Refining Company. Thermodynamic principles of the Rankine cycle as the ideal cycle for steam power plant analysis were applied in this study. Boiler operating pressures of 43bar and 61bars w...

Soil pollution by petroleum and its products in Niger Delta region of Nigeria are predominant due to oil exploration, exploitation and transportation.The aim of this study was to examine the effects of oxygen diffusion onthe physicochemical characteristics of petroleum contaminated sandy loam soils at 100cm depth when there is sufficient availabili...

This study evaluates the analysis of Inflow Performance Relationship (IPR) of a solution gas drive oil reservoir system (i.e. Saturated Reservoir, case; Pr ≤ Pb) using an ad-hoc (simulator Ronald Obia Simulator (ROS)) designed for the purpose of this research work. The computer program (ROS) was developed in the cause of this study to analyze a 6-T...

The effect of capillarity on diffusion of crude oil in soil environment in some fifteen measuring cylinders of different capacities, diameters and heights ranging from 10cm 3 , 100cm 3 , 250cm 3 , 500cm 3 , and 1000cm 3 volumes, 1.20cm, 2.80cm, 3.90cm, 4.80cm and 6.40cm diameters and 12.80cm, 24.10cm, 29.50cm, 34.0cm and 42.50cm respectively. Three...

Investigation was conducted to examine the rate of diethyl-ether production from ethanol using the approach of vapour-phase dehydration. The following functional parameters were examined to determine the significance on the production of diethyl-ether from ethanol on the concept of vapour-phase dehydration. The functional parameters are space time,...

Investigation was carried out to examine the effect of crude oil contamination of Aluu soil and some of the physiochemical parameters. The physiochemical parameters studied were temperature, pH value, electrical conductivity and available phosphorus. The result obtained revealed the significant effect of the crude oil contamination on the physicoch...

A three-dimensional and multiphase mathematical model was developed to estimate the volume of oil, gas, water in the reservoir. The mathematical model equations were derived based on the principle of conservation of mass. The numerical solution of these model equations involved the use of finite difference method of approximations for the discretiz...

A mathematical model (ANIWART_EHIRIMMODEL) based on Production Index has been developed for the prediction of oil and gas production in a single well and total reservoir.This equation can be used by Petroleum Engineers to estimate initial hydrocarbon in place, hydrocarbon reserves at some abandonment conditions, forecasting future production rate a...

The world's energy demands are met by crude oil, improving oil recovery is recognized as the major target and challenge at the different stages of an oil field development. After conventional primary and secondary production techniques have been employed, huge amount of crude oil is left underground. This point out the need to study and implement n...

Nigeria currently has the largest proven natural gas reserves in Africa. A Nigeria Liquefied Natural gas (NLNG) exports about 75% of Nigeria's daily gas production. Approximately 52% of her export is to Asia. The discovery of huge natural gas reserves in Eastern Africa, especially Mozambique and Tanzania is a major threat to Nigeria's Asian market...

Buckingham Pi theorem has been used to develop a unique predictive corrosion rate /model for estimating the corrosion rate of materials in saline environment. The model was first developed for corrosion of mild steel in fresh water and the developed equation was validated using experimental data obtained from weight loss method and collaborated wit...

The world's energy demands are met by crude oil, improving oil recovery is recognized as the major target and challenge at the different stages of an oil field development. After conventional primary and secondary production techniques have been employed, huge amount of crude oil is left underground. This point out the need to study and implement n...

The removal of heavy metals like copper from industrial effluents is of great importance to both the industries and the ecosystem. The harmful effect of these metals if discharged into the water body results in the high rate of cancer in our society. This experimental research is directed towards the use of electrochemical fixed Bed reactor in the...

Pressure-Volume-Temperature (PVT) analysis of reservoir fluid is an important concept that provides some useful information on the properties of a reservoir with hydrocarbon in place. There is therefore the need to validate and where necessary correct PVT data at the minimal cost before application. This work was able to evaluate the PVT parameters...

This paper considered the performance of water condenser and coolers in the bulk section of polypropylene plants using the Spheripol Process. The condenser and coolers were installed to capture condensable from recycle steams. The efficiency of polypropylene condenser was least in all the coolers and condenser under the scope of this study. A model...

A study was carried out on Mathematical Modeling of oxygen diffusion on bioremediation of petroleum contaminated soils at 100cm depth in Niger Delta region of Southern Nigeria. This study is important for the model prediction of oxygen concentration and carbon dioxide production variation with times for petroleum contaminated soils. The Mathematica...

Nigeria currently has the largest proven natural gas reserves in Africa. A Nigeria Liquefied Natural gas (NLNG) exports about 75% of Nigeria's daily gas production. Approximately 52% of her export is to Asia. The discovery of huge natural gas reserves in Eastern Africa, especially Mozambique and Tanzania is a major threat to Nigeria's Asian market...

The separation of mixture in phases or waste treatment is optimally successful using fluidized bed reactor, which is operated in stages of increasing velocities ranging from minimum fluidization velocity, fluidization velocity and terminal velocity that can cause flow of the fluid medium. A design based on the first principles of mass transfer is c...

The removal of toxic materials and recovery of heavy metals from industrial wastewater or effluents is done using fluidized bed electrochemical reactors. A design based on the first principles of mass and charge transfer is carried out on fluidized bed electrochemical reactor operating under Current Limit conditions. The design was based on the tre...

Energy related environmental problems, including oil spills, air pollution, flooding and deforestation have become a threat to world's biodiversity and delicate ecosystems. Oil spills are frequent in developing countries such as Nigeria, and have been the cause of severe environmental damage. For example, spills in Ogoni Land and other water bodies...

Wellbore performance analysis involves establishing a relationship between tubular size, wellhead and bottomhole pressure, fluid properties and fluid production rate. As fluid flow through the wellbore there is a drop in pressure which tend to impede production rate. The modified Bernoulli's equation was applied in calculating the acceleration pres...

Crude oil pollution on soil is a major environmental issue in the Niger Delta region of Nigeria due to oil exploration and exploitation. Treatment of crude oil contaminated soils is a major challenge to researchers in this region when its penetration level is beyond agricultural soil (30cm). This study aimed at examining the effect of oxygen diffus...

A mathematical model to describe the effect of increase in bed volume of a three-dimensional fluidized bed electrode operating under the condition of mass transfer is presented. The process of electrodeposition within electrochemical reactor results in the increase of particle sizes. This phenomenon increases the volume of the bed. The model incorp...

A mathematical model to describe the effect of increase in bed volume of a three-dimensional fluidized bed electrode operating under the condition of mass transfer is presented. The process of electrodeposition within electrochemical reactor results in the increase of particle sizes. This phenomenon increases the volume of the bed. The model incorp...

Mathematical correlations were developed to predict the behavior of iron roofing sheets on exposure to different environmental conditions. The analytical results from Atomic Absorption Spectroscopy (AAS) of chromium, iron oxide and zinc contents for the locations considered were fed into the developed equation. Corrosion rates were determined by we...

The process of electrodeposition within electrochemical reactor results in the increase of particle sizes, which increases the volume of the bed. This work entails a mathematical model to describe the effect of this phenomenon on the behaviour of a three-dimensional fluidised bed electrode operating under the condition of electron transfer. The mod...

The treatment of effluents containing toxic materials and heavy metals has been intensified due to economic and principally ecological reasons. Electrochemical techniques are very important and promising due to the fact that they involve "one pass" and principally because the technology is clean (compared to conventional cleaning methods) where the...

The removal of toxic materials and recovery of heavy metals from industrial effluents are done using porous or tridimensional electrochemical reactors. A mathematical model based on the first principles of mass and charge transfer is presented to describe the behaviour of a tridimensional fluidized bed electrode operating under mass transfer (limit...

A composting process scheme for Port Harcourt Nigeria is developed. The composting facility required for the process is not only designed such that technical viability is achieved, but also to handle sufficient volumes of wastes generated in the metropolis. Principles of bio-kinetics, mass transfer, and heat transfer and equilibrium phenomenon are...

A composting process scheme for Port Harcourt Nigeria is developed. The composting facility required for the process is not only designed such that technical viability is achieved, but also to handle sufficient volumes of wastes generated in the metropolis. Principles of bio-kinetics, mass transfer, and heat transfer and equilibrium phenomenon are...

This work identifies the causes of corrosion on oil and gas facilities based on the kinetics and thermodynamics models. Inherent factors which cause corrosion on oil and gas infrastructure are presented. The work details the processes of corrosion controlling methods; cathodic protection and coatings application. Problems encountered in the control...

The adsorption isotherms of MCl(2) (M Mn, Ni, Cu, Zn and Cd) and FeCl(3) by silica gel chemically modified with benzimidazole molecules ( Si(CH(2))(3)NC(7)H(5)N) were studied in ethanol solution at 298 K. A column made of modified silica was used to adsorb and preconcentrate the above metal ions from ethanol solution. Elution was done with 0.1 M hy...