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OALib Journal期刊

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Use of Drag Reducer in Improving Water (Flooding) Injectivity in Ukpokiti Field, Niger Delta
Amieibibama JOSEPH,Joseph Atubokiki AJIENKA
Leonardo Electronic Journal of Practices and Technologies , 2010,
Abstract: Evaluation of water-flooding injectivity involves identifying the causes of the problem(s) of the operation and coming up with possible solutions. Ukpokiti field was projected to be injected with 40,000BWPD, however, on commencement of operation only about 30,000BWPD could be injected. This live field experimental work identified pipeline restriction to the injector wellheads as responsible for the lower injectivity. The test involved injecting 15ppm, 20pm and 27ppm of Conoco drag reducer (CDR) downstream the turbine pumps that supply water to the injector wells. Velocity and the injection rate of water to the injector wells (with no CDR added) were measured. From the field results, 20ppm of CDR injection gave optimum injection increase of 13% and adding a third side outlet 3 pipeline into the wellheads gives independent 16% increase in injectivity. The test had no negative impact on the environment. The result could be applied as an aid and quick means of predicting water-flooding operation in similar operating condition as Ukpokiti field.
Evaluating the performance of ultrasound energy on improved oil recovery using MATLAB reservoir simulation toolbox (MRST)
Alhaji Dodo Ibrahim Sulaiman,Joseph Atubokiki Ajienka,Usman Hassan
- , 2019, DOI: 10.5897/JPGE2019.0311
Abstract:
Economic Evaluation of Multiphase Meters
Samuel S. MOFUNLEWI,Joseph. A. AJIENKA
Leonardo Journal of Sciences , 2007,
Abstract: When operators must decide between a traditional approach to the production facilities and one including multiphase flow meters (MPFM), they must compare the capital and operating expenditures (CAPEX and OPEX) of each solution. In order to achieve this, CAPEX and OPEX for the same brand of test separator and multiphase flow meter were obtained.A deterministic economic model was developed for evaluating the economics of MPFM and Test Separators. Two cases were considered. Case A considered whether it will be more economical to replace a test separator with a multiphase flow meter when the test separator is already in place while Case B considered which is more economically viable to install between the multiphase flow meter and test separator.Net Present Value (NPV) for both cases was calculated. Case A gave an NPV of $72,630.65 while Case B gave an NPV of $91,064.83. This shows that MPFM is a more cost-effective means of obtaining well-test data. Sensitivity studies of the economic parameters were also considered and spider diagrams presented.
Determination of Multiphase Flow Meter Reliability and Development of Correction Charts for the Prediction of Oilfield Fluid Flow Rates
Samuel S. MOFUNLEWI,Joseph A. AJIENKA,D. APPAH
Leonardo Journal of Sciences , 2008,
Abstract: The aim of field testing of Multiphase Flow Meter (MPFM) is to show whether its accuracy compares favourably with that of the Test Separator in accurately measuring the three production phases (oil, gas and water) as well as determining meter reliability in field environment. This study evaluates field test results of the MPFM as compared to reference conventional test separators. Generally, results show that MPFM compares favourably with Test Separator within the specified range of accuracy.At the moment, there is no legislation for meter proving technique for MPFM. However, this study has developed calibration charts that can be used to correct and improve meter accuracy.
Oilfield Production Surveillance as a Management Tool for Environmental Monitoring
JA Ajienka, A Kuye
Journal of Applied Sciences and Environmental Management , 2007,
Abstract: Oilfield production surveillance is the effective monitoring of petroleum reservoirs, producing wells, flow station facilities and flow lines. Through surveillance, the production of unwanted effluents (formation water, excess gas, etc.) can be controlled. Production problems such as sand production, emulsion, corrosion, scale formation and wax blockage can lead to disposal problems and poor integrity of facilities and consequent financial losses. This paper presents a system approach for carrying out oilfield production surveillance process. Using case studies it is shown that the process can be used to identify unfavourable conditions such as gas leaks, corrosivity, and unsafe wells. It is further recommended that the frequency of surveillance should be monthly
Stationary Super-Gravitational States  [PDF]
Joseph Towe
Journal of Modern Physics (JMP) , 2011, DOI: 10.4236/jmp.2011.21007
Abstract: The string background AdS7XS4 is adopted and the early universe is modeled in the eleven dimensional SUGRA theory that is dual to this background. Specifically the ground state of the vacuum is associated with an arbitrary distribution of closed, spin-2 strings, and excited states are modeled as geometric combinations of individual strings. Combinations or combining iterations are, by hypothesis, admissible or geometric if each iteration intrinsically incorporates the metrical scale that is assigned to the individual spin-2 string. It is demonstrated that a generalization of this process, if appropriately calibrated, establishes theoretical fermionic masses that correspond approximately to observed values. The proposed model also predicts a new quark of mass .
Using Multimedia Case Development as a Critical Reflective Tool for Revitalizing School Stakeholders’ Organizational Learning  [PDF]
Joseph Claudet
Creative Education (CE) , 2011, DOI: 10.4236/ce.2011.23028
Abstract: This article reports design and development efforts associated with one school-university collaborative partnership project focused on assisting K-12 school community stakeholders struggling with difficult school improvement challenges learn how to reinvent themselves as organizational teams to engage effectively in positive school change and renewal. The project employs an alternative, immersive organizational learning design in conjunction with available multimedia technology to leverage stakeholders’ own lived experiences and leadership challenges as opportunities to engage school community participants in a unique organizational case development and team learning adventure. Multimedia case development and production activities involving school community stakeholders in one elementary school are highlighted. Insights derived from the use of multimedia case development as an organizational leading and learning tool for educators and other stakeholders in school communities are discussed.
The Photon Wave Function  [PDF]
Joseph Cugnon
Open Journal of Microphysics (OJM) , 2011, DOI: 10.4236/ojm.2011.13008
Abstract: The properties of a wave equation for a six-component wave function of a photon are re-analyzed. It is shown that the wave equation presents all the properties required by quantum mechanics, except for the ones that are linked with the definition of the position operator. The situation is contrasted with the three-component formulation based on the Riemann-Silberstein wave function. The inconsistency of the latter with the principles of quantum mechanics is shown to arise from the usual interpretation of the wave function. Finally, the Lorentz invariance of the six-component wave equation is demonstrated explicitly for Lorentz boosts and space inversion.
Redesigning Staff Development as Organizational Case Learning: Tapping into School Stakeholders’ Collaborative Potential for Critical Reflection and Transformative Leadership Action  [PDF]
Joseph Claudet
Open Journal of Leadership (OJL) , 2012, DOI: 10.4236/ojl.2012.14005
Abstract: This article reports on activities associated with one school-university partnership project focused on providing multimedia-integrated organizational learning and development opportunities to stakeholders in K-12 school communities struggling with real-world school change and improvement challenges. A central feature of the project’s organizational case learning design is the use of multimedia case production technology in conjunction with context-specific school situational data to immerse school stakeholders in the theatrical portrayal and analysis of their own school dilemma challenges as a means to jumpstart collaborative teaming and data-driven problem solving. Multimedia case development and analysis efforts involving stakeholders in one middle school community who are confronting a difficult, politically charged set of school improvement challenges are highlighted. Project findings associated with the use of multimedia technology and data-driven organizational case learning as tools to inform an alternative staff development approach for promoting positive school leadership teaming and real-world problem solving among education stakeholders in K-12 school communities are discussed.
On Approximating Fermion Masses in Terms of Stationary Super-String States  [PDF]
Joseph Towe
Journal of Modern Physics (JMP) , 2013, DOI: 10.4236/jmp.2013.44076
Abstract:

AdS/CFT correspondence is adopted and fermion masses are modeled as analogues of Weyl curvature states, which occur by hypothesis when closed spin-2 strings sweep out closed world tubes. Admissible curvature states are established by gauge invariance and fundamental mass is attributed to admissible curvature. A consequent spectrum of masses forms an SU(3) symmetry that is invariant under appropriate realizations of the SUGRA GUT interaction. Finally the spin-h/2 nature of the masses that are attributed to curvature emerges as a necessary condition for the relevant SUGRA GUT realizations. Calibration of the proposed model reveals a spectrum of fermion masses that corresponds approximately to observation. Moreover, the proposed model predicts a new quark that is characterized by I3 = -1/2 and by a mass of about 30 GeV/c2.

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