Engineering

Research Papers/Topics in Engineering

Application Of Minimum Curvature Method To Wellpath Calculations

ABSTRACT A major drawback of directional and horizontal well drilling is the numerous complex computations required to be done while planning a well. These computations are very stressful and time consuming especially when done manually. One of the objectives of this study was to develop a user friendly Excel Spreadsheet program that would make the computations of these well trajectory parameters easier, faster and accurate. An Excel Spreadsheet program was developed employing the Mini...

Pressure Transient Analysis Of Bingham Fluids Using Tiab’s Direct Synthesis Approach

ABSTRACT This study investigated transient flow response of heavy oil that exhibit Bingham fluid characteristics. Four wellbore conditions in naturally fractured reservoirs were considered which include horizontal well, hydraulically fractured well, partially penetrating and fully penetrating vertical wells. Physical models were established and corresponding mathematical models were presented taking cognisance of minimum threshold pressure,𝜆𝐵. The model was solved analytically by ...

Optimizing Field Performance Using Injection Efficiency From Streamline-Based Workflow

ABSTRACT Waterflooding is one of the most common secondary recovery mechanisms available for improving oil recovery from known accumulations. Due to the limitation of available water for injection, there's a need to optimize the use of this limited resource. To this end, a methodology has been developed to allocate injection water to more efficient wells than to those of lower efficiency. Streamline simulation is a complementary tool to conventional finite difference simulation, provid...

Bioinspired Design

Abstract Bioinspired design involves the use of concepts observed in natural biological materials in engineering design. The hope is that the leveraging of biological materials in the engineering domain can lead to many technological innovations and novel products. This work presents the initial material characterization of kinixys erosa tortoise shell using a combination of xray diffraction, optical/scanning electron microscopy and micro-mechanical testing. The results were used in the ...

Transient Analysis And Performance Prediction Of Passive Cooling Of Buildings Using Long Wave Nocturnal Radiation In Owerri, Nigeria

ABSTRACT Transient analysis and performance prediction of passive cooling of buildings using long wave nocturnal radiation in Owerri, Nigeria are presented. Owerri is a typical urban area in southeastern Nigeria lying between latitude 5° 4' and 6° 3' N and longitude 6° 15'and 7° 34' E. The system modeled consists of the room of a building with a radiator panel attached to its roof, water storage tank located inside the room, pump to circulate water through the radiator panel at night and ...

Effect Of Pipe Inclination Angle On Gas–Liquid Flow Using Electrical Capacitance Tomography (Ect) Data

ABSTRACT Pipes that make up oil and gas wells are not vertical but could be inclined at any angle between vertical and the horizontal which is a significant technology of modern drillingExperimental data on time varying liquid holdup for and pipe inclination angles were analyzed and interpreted. Parameters such as void fraction, slug frequency, lengths of liquid slug, Taylor bubble and slug unit, structure velocity and pressure drop were calculated from the experimental data. It was obse...

Transient Stability Analysis Of Nigeria Power System: Multimachine Approach

ABSTRACT The recent power sector reform in Nigeria has thrown up enormous challenges in this sector, ranging from the construction of more power stations, construction of new transmission lines and substations. The existing network of 8-plants and 26 bus-bars expanded to the proposed network of 16 generating plants with 49 bus-bars. This network expansion requires reappraisal for power evacuation capabilities, relay systems setting and establishment of stability margins for adverse syste...

Use Of Local Clays For The Production Of Porcelain Pin Insulators

ABSTRACT  The use of local clays for the production of porcelain pin insulators was investigated. Clays from Awo-omama, Ibere and Nsu were used for the study. Test samples were made by varying the compositions of feldspar and quartz needed to form a mouldable plastic body with each clay. The following properties were determined: electrical resistivity, apparent porosity, water absorption, bulk density, linear shrinkage as well as crystalline phases produced after firing. This charac...

A Review Of The Rheological Effects Of Power Law Drilling Fluids On Cuttings Transportation In Non-Vertical Boreholes

ABSTRACT Cuttings transportation during in non-vertical boreholes is necessary for oil and gas wells. Adequate cuttings removal from a well in drilling is critical for cost-effective drilling as high annular cuttings buildup often leads to high risk of stuck pipe, reduced rate of penetration and other impediments to standard drilling and completion procedures. This study investigates how rheological parameters influence the removal of cuttings in non-vertical boreholes. It contributes ...

Morphology Analysis Of Lead Iodide- And Lead Acetatebased Perovskite Layers For Solar Cell Application

ABSTRACT Organolead trihalide perovskite solar cells have shown success as light absorbers in photovoltaic cells due to their efficiency increasing from 3.5% to over 20% within only five years. However, pinhole formation and incomplete coverage of solution-processed perovskite film results in increased current leakage, reducing efficiency. Hence the surface morphology of perovskite film is important for high performance of perovskite solar cells. Here the morphology is carefully control...

Implications Of Production Decline Patterns, Cost Depreciation Methods And Fiscal Regimes On Offshore Profitability In Nigeria

ABSTRACT Upstream petroleum industry remains one of the most prolific industries in terms of technology and risk capital transfer. Consequently, governments all over the world try to formulate political as well as economic structures that could favourably attract investments to their petroleum provinces. These structures are spelt out in their petroleum fiscal systems. A good fiscal system tends to find a common ground for both government and the contractor by way of optimizing both effo...

Effect Of Cooling Rate And Modification On The Microstructure And Tensile Properties Of Al-Si-Mg Alloy

ABSTRACT The effect of cooling rate and modification on the microstructure and tensile properties of Al-Si-Mg alloys was carried out. Castings were produced using a stepped pattern that has different section thicknesses.  Sand casting technique was used.  A thermocouple inserted into the mould cavity recorded the cooling rates for the different sections. The Al5.43%Si3.83%Mg which was melted in the crucible furnace was modified with sodium (Na) and stro...

Temperature Prediction Model For Flowing Distribution In Wellbores And Pipelines

ABSTRACT Down-hole temperature and pressure data are important information needed to understand flowing conditions and production optimization. For example, knowing the wellbore temperature profile is useful in predicting the wax formation in the tubing, which is important in flow assurance. While gas production usually causes a temperature decrease due to Joule Thomson effect, water entry results in warming of the wellbore. Warmer water entry is as a result of inflow from a warmer aqu...

Economic Analysis And Application Of Single Point Gas Lift Systems For Marginal Fields Of The Niger Delta

ABSTRACT  The purpose of this study is to develop an innovative technique for optimized gas lift design for marginal fields of the Niger Delta. This study used well data from mature fields located southwest of the Niger Delta to develop optimized gas lift design techniques using the single point continuous gas lift approach. A total of fifty-nine (59) wells from the fields were selected for preliminary screening as potential gas lift candidates. The screening process involved; revie...

Genetic Units Based Reservoir Characterization Using A Normalized Pore Throat Radius For The Clastic System: Niger Delta As Field Case Study

Abstract Globally, 30–50% of hydrocarbon volumes in silici-clastic reservoirs are contained within the thin-bedded pay. In the Niger Delta deep water assets, over 30% of in-place volumes are found within the complex turbidites. The presence of multi-pore architecture within such facies makes their description from petrophysics very complex. With the quest for hydrocarbon prospects in frontier deep water settings characterized by such complex rock fabric, detailed reservoir characteriz...


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