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Article Open Access QUANTITATIVE PETROPHYSICAL EVALUATION AND RESERVOIR CHARACTERIZATION OF WELL LOGS FROM "DATOM" OIL FIELD, NIGER DELTA
Get PDFThis paper presents a detailed reservoir characterization of three wells in “Datom” Oil Field, Niger Delta
using well logs data. The distributions and thicknesses of sand bodies were determined within each of
the wells in the field using interactive petrophysical (IP) software. The quantitative and qualitative analysis were done for the three exploration wells with the depth ranges of 8700-9200ft for Datom North
well , 8900-9400ft for Datom West well, and 9000-9500ft for Datom East well. Two distinctive porous
sand bodies were identified across the field (A and B), Datom North has it reservoirs as 1A (8815-
8903ft) and 1B (9100-9157ft), Datom West has its reservoir as 2A (8996-9095ft) and 2B (9263-
9321ft) and Datom East as 3A (9101-9219ft) and 3B (9357-9418ft). Petrophysical evaluation was
made from a suite of wire-line logs comprising of gamma ray, resistivity, neutron and density logs of
the wells. The average porosity values obtained are in the range of 0.18-0.22 with average net pay
permeability values ranging from 322.70mD to 733.20mD. The water saturation obtained for each
reservoir unit in combination with the resistivity index was used to prove the presence of hydrocarbon
in the sand units. The hydrocarbon saturation of the reservoirs are in the range of 0.6-0.7 across the
prospect zones with gas effect of the combination logs of neutron and density indicating the hydrocarbon accumulation is predominantly gas. The average net to gross ratio across the reservoirs (0.7-0.9)
is defined using an average porosity (∅) and volume of clay ( ) cut offs values of ≥ 0.1 ≤ 0.5 respectively. With a moveable hydrocarbon index (MHI= ⁄ ) less than 0.7 across the sand units, it
shows favorable hydrocarbon moveability in the reservoirs. The results clearly revealed that the gas
bearing sand units have good reservoir potentials favorable for hydrocarbon production
Design and Simulation of 1.28 Tbps Dense Wavelength Division Multiplex System Suitable for Long Haul Backbone
Get PDFWavelength division multiplex (WDM) system with on/off keying (OOK) modulation and direct detection (DD) is generally simple to implement, less expensive and energy efficient. The determination of the possible design capacity limit, in terms of the bit rate – distance product in WDM – OOK –DD systems is therefore crucial, considering transmitter/receiver simplicity, as well as energy and cost efficiency.
A 32-channel WDM system is designed and simulated over 1000 km fiber length using Optsim commercial simulation software. The standard channel spacing of 0.4 nm was used in the C–band range from 1.5436 to 1.556 nm.
Each channel used the simple non return to zero – on/off keying (NRZ – OOK) modulation format to modulate a continuous wave (CW) laser source at 40 Gbps using an external modulator, while the receiver uses a DD scheme.
It is proposed that the design will be suitable for long haul mobile backbone in a national network, since up to 1.28 Tbps data rates can be transmitted over 1000 km.
A bit rate length product of 1.28 Pbps.km was obtained as the optimum capacity limit in 32 channel dispersion managed WDM – OOK – DD system
Awareness and use of electronic databases by postgraduates in the University of Ibadan
Get PDFGlobalisation through modern information and communication technology (ICT) is
revolutionising the conduct of teaching and research in universities all over the world,
particularly in developing countries such as Nigeria. One significant impact of globalisation,
information and communication technology on teaching and research in developing countries
is access to global information resources by researchers and postgraduate students of the
universities. The university remains a centre of excellence, a citadel of learning, and more
importantly the epitome of research
Design and Development of a Wear Testing Machine for Manufacturing Laboratories
Get PDFWear of parts during manufacturing processes is inevitable but controllable. Therefore, the critical study of wear in engineering components is vital because failure of components due to wear has resulted in loss of a great deal of fortune. This study was therefore an attempt to design and fabricate a wear testing machine, evaluate the performance of the machine and compare data obtained with existing ones. Materials for the various parts were carefully selected based on desirable properties and availability. Design calculations were made for the main shaft, compression spring, belt, pulley and electric motor. The post fabrication test was carried out on the machine to evaluate the performance of the machine and results gotten reported
Parametric and Quantitative Analysis on the Development of Shell and Tube Heat Exchanger
Get PDFThe importance of mini shell and tube heat exchangers (STHEs) in industrial and other engineering applications cannot be underestimated. Hence, based on the problems associated with the design of STHEs, a mini STHE was developed for transfer of heat between two fluids without mixing on the laboratory scale using locally available materials and technology based on an optimized LMTD technique. The performance of the heat exchanger was assessed and evaluated to determine the optimum combination of design parameters. Copper was utilized for the tube side fluid due to its higher thermal conductivity and anti-microbial property, while galvanized steel was used for the shell side fluid due to its cost and corrosion resistance. Parametric studies were carried out on STHE design parameters to obtain an optimal design for efficiency and effectiveness after relevant design considerations. Experimental results were validated with quantitative models, and it was discovered that both Dell-Belaware and Engineering Science Data Unit (ESDU) approaches produced the optimal results required for the selection of shell side and tube fluid film coefficients, respectively over other correlations. In conclusion, the values of parameters of interest were also presented after rigorous mathematical calculations at optimal level and probable recommendations were later made
Evaluation of the Impact of Students' Industrial Training on Journalistic Skills Acquisition among Polytechnic Students in Delta State, Nigeria
Get PDFGood professional practice in journalism is a function of quality
training. Good journalistic training must integrate the teaching of
theory with exposure to practical skills to ensure adequate transition of
students into employable graduates. However, there is a gap between
theoretical training offered by various institutions of journalism and
mass communication training and the demands for practical skills
required for industry practice industry in Nigeria. This study evaluated
the impact of students' industrial training, coordinated by the Students'
Industrial Work Experience Scheme (SIWES) supervised by the
Industrial Training Fund (ITF) among other things in Nigeria, on the
acquisition of professional skills in journalism. It carried out a
questionnaire survey on 292 purposively selected Polytechnic
students of mass communication in Delta State, Nigeria who have
observed or are observing the industrial training. Findings showed that
industrial training had a significant effect on journalism education,
contributed significantly to the employability status of the students
and significantly influenced acquisition of professional skills in
journalism. It recommended an extension of the approved four-month
duration for the training programme and regular evaluative research
for possible improvement of the programme
Share Supporting the fight against terrorism: A proposal for public library services provision for internally displaced persons in North-East Nigeria
No full textThis paper examined the state of the internally displaced persons (IDPs) in North-East Nigeria, the need to provide education and information services to the IDPs, and the role of libraries. It begins with the remote cause of the displacement. The paper also examined the state of the IDPs in terms of education and information services provision. It reported that the IDPs live in very deplorable conditions. There are no provisions for education and information services. The paper further discussed the importance of education and information to IDPs especially the children, teens, and youths. It recommended the empowerment and involvement of public libraries in the provision of education and information services to IDPs. It alluded that public libraries and librarians are better positioned to provide education and information services to displaced persons. The paper concluded that if necessary logistics and support are provided, libraries and librarians have the capacity to provide effective and efficient education and information services to IDPs and therefore bridge the current gap
Genotoxicity Evaluation of Landfill Solid Leachates from Waste Dumpsite in Lagos State, Nigeria Using the Allium cepa Assay
No full textThe management of municipal landfill’s leachate is considered one of the most
significant environmental issues. Potential mutagenic and genotoxic effects of
solid waste leachates (SWL) were investigated using the Allium cepa root meristematic cells assay technique. In Allium root growth inhibition test, experimental onion bulbs were cultivated in various concentrations of the SWL and
distilled water was used as a negative control. The root tips from the treated bulb
were processedby orcein squash technique after 72 h. The mean lengths of root
bundles were obtained andeffective concentration (EC) values calculated. Some
of the physicochemical properties of the WL were also determined. The A. cepa
assay was carried out at concentrations of 0.05, 0.1, 2.0, 5, 10, 20, 50 and 100%
of the WL. There was a statistically different (p < 0.05), concentrationdependent inhibition of onion root growth and mitotic index, and induction of
chromosomal aberrations in the onion test. The results of the physicochemical
analysis revealed that the concentrations of some parameters were above the
maximum permissible limit set by the world health organization (WHO) and
could partly be correlated with the toxicity of wastewater. The landfill leachates
pose a risk to human health and the environment in general. Hence, ecotoxicity/genotoxicity assays would be useful in leachate risk assessment when coupled
with physicochemical analysis
Influence of Effective Communication and Compensation Management on Employees’ Engagement in Some Selected Financial Institutions in Lagos State, Nigeria
Get PDFThis study investigated the influence of effective communication and compensation management on employees’ engagement in some selected financial institutions in Lagos State, Nigeria. Employee Engagement is an important business approach for organisational success because high level of employee engagement in both private and public sector improve employees’ performance and organisational productivity. The survey research design method was adopted for the study and a total of 150 respondents were selected using random sampling techniques. Data were collected through the use of Gallup Q12 Employee Engagement Scale developed by Gallup (2013), effective communication scale adopted from the Institute for Employment Studies (IES) in Dilys, Sarah, and Sue, (2003) and Employee Satisfaction Scale in Crossley, Bennett, Jex, & Burnfield, (2007) to measure compensation management. The data collected were analyzed using statistical packages for social sciences (SPSS) which include descriptive analysis of demographic information using pie chart and simple percentage. Linear regression analysis and Pearson correlation were used to test the three hypotheses that were generated for the study at 0.01 alpha levels of significance. The study concluded that effective communication and compensation management have significant positive effect on employees’ engagement. Moreover, the findings also revealed that employees’ engagement is significantly related to organisational performance. Based on the findings of this study, it was recommended that organisations should increase employee engagement by going beyond downward communication and making sure that people are not just treated as employees; instead they should be treated as valued employees. Keywords: Effective communication, compensation management, employee engagement, organisational productivit
Change Management in the Academic Library: Transition From Print to Digital Collections
Get PDFThe introduction of ICT has no doubt changed and redefined the way and manner in which library operations are carried out. In this chapter, the phenomenon of change management was discussed and Unfreeze-Change-Refreeze model was adopted. The chapter also delved into the management of change in academic libraries, types of Digital library collections, access mode to digital collections, the need for transition from print to digital collections, the need to reposition library tools, resources and expertise, need for accessibility of collections by user, the need and benefits for preservation of digital resources, health and safety policies and prospect of change management. Despite the great achievements recorded in academic libraries due to change in operations, there is still another side to the coin. Issues such as techno stress which is a technology related health problem came to the fore. Other challenges such as increase in expenditure, staffing issues, etc. also surfaced