Estudo da viabilidade econômica na determinação do número ótimo de poços produtores para um reservatório de gás natural seco utilizando o balanço de materiais

Abstract

The purpose of this work is to determine the optimal number of producing wells used in a dry-gas reservoir by the development of a simulator that aims to analyze the natural gas production behavior in the reservoir combined with an economic analysis to identify the best economic scenario. For that, the simulator was programmed using the spreadsheets from Microsoft Excel and it was developed on those a simplistic methodology capable to perform an economic study in a pre-dimensioning dry gas field. For the modeling, it was used a material balance equation in the reservoir, considering this as dry gas with a stable flow regime. For the gas elevation it was proposed a well production model based on the linear relationship between the pressure in the reservoir and the well production flow. From the models of the gas behavior in the reservoir and the its life production period, an economic engineering study was conducted for ten different design models, which were varied the number of production wells to make an economic evaluation for each one, taking into account some economic evaluation indices, such as Net Present Value (NPV), Internal Rate of Return (IRR) and Payback. At the end of the simulation, the optimal number of wells obtained for certain dry gas reservoir used in this work was four producing wells, demonstrating that the design presents the most economic viability