Enhanced Oil Recovery Techniques for Mature Oil Fields: A Comparative Study of Chemical, Thermal, and Gas Injection Methods

Thesis Abstract

Abstract
Enhanced Oil Recovery (EOR) techniques play a crucial role in maximizing hydrocarbon production from mature oil fields. This thesis presents a comprehensive comparative study of three prominent EOR methods - chemical, thermal, and gas injection - to evaluate their effectiveness in enhancing oil recovery from mature oil fields. The aim of this research is to provide valuable insights into the most suitable EOR method for mature oil fields, considering factors such as cost-effectiveness, environmental impact, and overall efficiency. The study begins with an introduction to the significance of EOR techniques in the petroleum industry, particularly in the context of mature oil fields facing declining production rates. A detailed background of the study discusses the current challenges in conventional oil recovery methods and the need for advanced EOR strategies to optimize oil production. The problem statement highlights the limitations of existing EOR methods and emphasizes the importance of exploring alternative techniques for mature oil fields. The objectives of this study are to compare the performance of chemical, thermal, and gas injection methods in enhancing oil recovery, assess their economic feasibility, and analyze their environmental implications. The limitations of the study are acknowledged, including constraints such as data availability, technological constraints, and the complexity of field conditions. The scope of the study is defined in terms of the specific EOR methods, oil field characteristics, and geographical regions considered in the comparative analysis. The significance of this research lies in its potential to guide petroleum engineers and decision-makers in selecting the most suitable EOR method for mature oil fields to maximize oil recovery and extend the economic life of oil reservoirs. The structure of the thesis is outlined, detailing the organization of chapters and the flow of information to address the research objectives effectively. Definitions of key terms related to EOR techniques and oil field operations are provided to ensure clarity and understanding throughout the thesis. A comprehensive literature review in Chapter Two explores existing studies, theories, and practical applications of chemical, thermal, and gas injection EOR methods in mature oil fields. Ten critical aspects are examined, including the mechanisms of each EOR method, field applications, success stories, limitations, and future research directions. Chapter Three presents the research methodology employed in this study, encompassing a detailed description of the experimental design, data collection methods, analytical techniques, and modeling approaches used to compare the performance of chemical, thermal, and gas injection EOR methods. Eight key components of the research methodology are discussed to ensure the validity and reliability of the findings. In Chapter Four, the findings of the comparative study are discussed in detail, focusing on the effectiveness, efficiency, and practicality of chemical, thermal, and gas injection EOR methods in mature oil fields. The analysis includes numerical simulations, field case studies, economic evaluations, and environmental assessments to provide a comprehensive evaluation of each EOR method. Finally, Chapter Five presents the conclusions drawn from the research findings, summarizing the key insights, implications, and recommendations for the application of EOR techniques in mature oil fields. The thesis concludes with a summary of the main findings, contributions to the field of petroleum engineering, and suggestions for future research directions to further enhance oil recovery from mature oil fields using advanced EOR methods. In conclusion, this thesis contributes valuable knowledge and insights to the field of petroleum engineering by offering a comparative analysis of chemical, thermal, and gas injection EOR techniques for mature oil fields. The findings of this research can inform industry practitioners, researchers, and policymakers in making informed decisions to optimize oil recovery and extend the productive life of mature oil reservoirs.