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Optimizing Oil Well Cementing: Effects of Dispersant and Fluid Loss Additive Concentrations on Thickening Time and Free Fluid Formation Momoh abdulazeez adeyem; Akuma Oji; John Anaele; Nnadikwe Johnson
Jurnal Teknik Indonesia Vol. 5 No. 01 (2026): Jurnal Teknik Indonesia (JU-TI) 2026
Publisher : SEAN Institute

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Optimising cement slurry properties through appropriate additive selection is critical for ensuring successful zonal isolation and preventing costly wellbore failures in oil and gas operations. This research investigated the effects of dispersant and fluid loss additive concentrations on the thickening time and free fluid formation of Class G cement slurry. A systematic two-factor three-level (3²) factorial design was employed, generating nine experimental runs. Statistical analysis included correlation analysis, ANOVA, and multiple regression modelling. The results revealed that dispersant concentration exhibited the strongest influence on thickening time behaviour, establishing it as the primary control mechanism for cement slurry pumpability. Fluid loss additive concentration demonstrated dual functionality, serving both as an effective filtration control agent and providing secondary influence on thickening time. Significant interaction effects were observed between dispersant and fluid loss additive concentrations (p = 0.040), indicating synergistic behaviours. Multiple regression analysis yielded highly predictive models for both response variables, with R² = 0.981 for thickening time and R² = 0.845 for free fluid. The developed models provide a systematic framework for cement slurry optimisation in oil well cementing operations, enabling precise targeting of cement slurry properties for improved well integrity and performance. The research demonstrates the effectiveness of factorial experimental design methodology for understanding complex additive interactions in cement slurry systems.
Unlocking the Functional Mechanics of Gas Turbine Plants: Enhancing Reliability, Efficiency, and Environmental Sustainability Onyewudiala Ibeawuchi Julius; Samuel Hanotu Kwelle.; Nnadikwe Johnson
Jurnal Teknik Indonesia Vol. 4 No. 02 (2025): Jurnal Teknik Indonesia (JU-TI) 2025
Publisher : SEAN Institute

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Abstract. Gas turbine plants play a vital role in modern society's energy generation, with a focus on reliability, efficiency, and sustainable development. This research aims to investigate and enhance the operational principles of gas turbine plants to achieve these objectives. The study begins by examining the current operational practices and challenges faced by gas turbine plants, highlighting the need for continuous improvement. Factors influencing the reliability of gas turbine plants are analyzed, and strategies for enhancing reliability are proposed to ensure uninterrupted power supply. Efficiency is a key focus of the research, with an evaluation of the performance of gas turbine plants using equations such as η = 1 - (1/r^(γ-1)/γ) to identify areas for optimization. By maximizing efficiency, cost savings can be achieved, and environmental impact reduced, contributing to sustainable development. Environmental sustainability is another crucial aspect of the study, with an assessment of the environmental impact of gas turbine plants and exploration of measures to minimize emissions, resource consumption, and promote eco-friendly practices. Innovative technologies and best practices for improving the operational efficiency of gas turbine plants are investigated, including the use of regenerators with effectiveness ε = (T_hot,in - T_hot,out) / (T_hot,in - T_cold,in) and heat transfer equations Q = m × (h2 - h1). The research culminates in a set of recommendations and guidelines for enhancing the overall performance and sustainability of gas turbine plants, aligning with industry standards and environmental regulations. By achieving the objectives outlined in this research, we aim to contribute to the advancement of gas turbine plant operations, fostering reliable, efficient, and environmentally sustainable energy generation practices for a better future
Pioneering the future of industrial Development:Harnessing Membrane separation Breakthroughs to propel CO2 extractiom from Natural gas into a Sustainable Era Nnadikwe Johnson; Momoh Abdulazeez Adeyemi; Onuabuchi Azunna
Jurnal Teknik Indonesia Vol. 4 No. 02 (2025): Jurnal Teknik Indonesia (JU-TI) 2025
Publisher : SEAN Institute

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  Natural Gas (NG) processing is a prominent industrial separation process. Among the available techniques, the innovative membrane process shows potential for efficient removal of impurities, including carbon dioxide (CO2). This study focuses on utilizing breakthroughs in membrane separation to drive sustainable CO2 extraction from natural gas. Through comprehensive research and analysis, we explore the effectiveness and feasibility of membrane-based systems in removing CO2 impurities from NG, thus promoting greener and more sustainable industrial practices. Our findings underscore the transformative nature of membrane separation technology, presenting new possibilities for a more environmentally-friendly and sustainable approach to CO2 extraction from natural gas. Natural Gas (NG) processing utilizes various techniques for impurity removal, with the membrane process emerging as a promising option for efficient carbon dioxide (CO2) extraction. This research proposes the integration of a simple mathematical model into ASPEN HYSYS to design a membrane system for CO2/CH4 separation. The study also investigates parameter sensitivities by altering operating conditions, such as feed composition and pressure, as well as membrane properties, including selectivity. By analyzing these variables, we aim to optimize the performance and efficiency of the membrane system, facilitating the sustainable extraction of CO2 from NG. The findings contribute to advancing the design and operation of membrane-based processes for CO2 separation, paving the way for greener and more sustainable industrial practices.  In addition, this study explores various configurations for optimizing the design of the membrane system, including single stage with and without recycle, as well as double stage configurations. The investigation demonstrates that methane recovery can be enhanced through the recycling of the permeate stream and by implementing a double stage membrane system. These findings highlight the potential for improving the efficiency and performance of the membrane system, enabling higher methane recovery rates. By considering different configurations, this research contributes to the development of more effective and sustainable CO2 extraction processes from natural gas.