Estudo do processo de injeção de vapor em reservatórios de óleo pesado, usando poços horizontais

Abstract

In a recent scenario marked by economic and technological changes, the oil industry is increasingly developing in order to produce in larger quantities and at a lower cost. Currently, the oil industries work with several types of reservoirs, among them are the heavy oil reservoirs, which are of extreme importance because they have significant oil reserves. These reserves are present even in the Brazilian northeast and require certain techniques for their production, as is the case with thermal methods. In this study the steam injection was carried out continuously, with horizontal wells, following the principle of oil drainage by gravitational segregation (SAGD), to improve production. In this evaluation, a technical and economical analysis of a reservoir with characteristics pertinent to the Brazilian northeast was made, using some Computer Modeling Group (CMG) computational tools such as WinProp, Builder and STARS. several injection schemes with horizontal wells, varying the number of wells (injectors and producers), the injection flows and the distribution schemes of the wells. By comparing the cases, it was possible to state that for this reservoir in question, the "W" configuration, with the use of 6 injection wells and 5 production wells, achieved the best production efficiency.