doctoralThesis
Estudo do acoplamento do poço injetor nas simulações de injeção cíclica de vapor
Fecha
2013-02-20Registro en:
SOUZA JÚNIOR, José Cleodon de. Estudo do acoplamento do poço injetor nas simulações de
injeção cíclica de vapor. 2013. 506 f. Tese (Doutorado em Pesquisa e Desenvolvimento em Ciência e Engenharia de Petróleo) - Universidade Federal do Rio Grande do Norte, Natal, 2013.
Autor
Souza Júnior, José Cleodon de
Resumen
Steam injection is a method usually applied to very viscous oils and consists of injecting heat
to reduce the viscosity and, therefore, increase the oil mobility, improving the oil production.
For designing a steam injection project it is necessary to have a reservoir simulation in order
to define the various parameters necessary for an efficient heat reservoir management, and
with this, improve the recovery factor of the reservoir.
The purpose of this work is to show the influence of the coupled wellbore/reservoir on the
thermal simulation of reservoirs under cyclic steam stimulation. In this study, the
methodology used in the solution of the problem involved the development of a wellbore
model for the integration of steam flow model in injection wellbores, VapMec, and a blackoil
reservoir model for the injection of cyclic steam in oil reservoirs. Thus, case studies were
developed for shallow and deep reservoirs, whereas the usual configurations of injector well
existing in the oil industry, i.e., conventional tubing without packer, conventional tubing with
packer and insulated tubing with packer. A comparative study of the injection and production
parameters was performed, always considering the same operational conditions, for the two
simulation models, non-coupled and a coupled model. It was observed that the results are very
similar for the specified well injection rate, whereas significant differences for the specified
well pressure. Finally, on the basis of computational experiments, it was concluded that the
influence of the coupled wellbore/reservoir in thermal simulations using cyclic steam
injection as an enhanced oil recovery method is greater for the specified well pressure, while
for the specified well injection rate, the steam flow model for the injector well and the
reservoir may be simulated in a non- coupled way