Thesis Abstract

Gas lift optimization is crucial for maximizing oil production in wells. This study focuses on the application of Prosper nodal analysis to optimize gas lift performance in oil producing wells. The research aims to develop a systematic approach to determine the optimal gas lift design parameters, such as gas injection rate and valve settings, to enhance production efficiency and ultimately increase oil recovery. The Prosper nodal analysis software provides a comprehensive platform for modeling and analyzing the performance of gas lift systems. By integrating reservoir, wellbore, and surface facility data, the software enables engineers to simulate different gas lift scenarios and evaluate their impact on well performance. This enables the identification of the most effective gas lift design for a specific well, taking into account factors such as reservoir pressure, fluid properties, and equipment limitations. The optimization process involves conducting sensitivity analyses to assess the influence of various parameters on gas lift performance. By systematically varying gas injection rates, valve positions, and other design variables, engineers can identify the optimal operating conditions that result in maximum oil production. Additionally, the nodal analysis allows for the identification of bottlenecks and inefficiencies in the gas lift system, enabling targeted interventions to improve overall performance. Furthermore, the study considers the economic aspects of gas lift optimization. By quantifying the impact of different gas lift designs on production rates and operating costs, engineers can determine the most cost-effective solution that maximizes profitability. This involves assessing the trade-offs between increased oil recovery and higher gas lift expenses, as well as considering factors such as equipment reliability and maintenance requirements. Overall, the research aims to provide a systematic framework for gas lift optimization in oil producing wells using Prosper nodal analysis. By leveraging advanced simulation tools and engineering principles, engineers can develop customized gas lift designs that improve production efficiency and enhance overall field performance. This research contributes to the ongoing efforts to optimize oil recovery from mature fields and sustainably manage hydrocarbon resources.

Thesis Overview

Introduction

Hydrocarbons(oil and gas) are found in the pore spaces of sedimentary geologic formations (reservoir rocks). Once an oil or gas reservoir is discovered and assessed, production engineers begin the task of maximizing the amount of oil or gas that can ultimately be recovered from it. Some reservoir rocks may allow the oil and gas to move freely, making it easier to recover. Other reservoirs do not part with the oil and gas easily and require special technique to move the oil or gas from the pore spaces in the reservoir rock to a producing well. Even with today’s technology, in some reservoirs more than two-thirds of the oil in the reservoir may not be recoverable.
Optimum production of oil from an oil reservoir is the main objective or target of the operators of an oil well in order to meet up with the growing demands of the crude oil. The efficient production of fluids from a reservoir depends on the maintenance of the pressure draw down between the reservoir and the well bore which is the driving force or energy that forces the reservoir fluid (oil) from the reservoir into the wellbore.