Banca de QUALIFICAÇÃO: LEONARDO ASFORA DE OLIVEIRA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : LEONARDO ASFORA DE OLIVEIRA
DATA : 31/03/2017
HORA: 09:00
LOCAL: Sala de reuniões do CTEC (312)
TÍTULO:

ANALYSIS ON THE APPLICATION OF SURFACE EJECTORS TO INCREASE  SUBMERGENCE IN OIL WELLS

PALAVRAS-CHAVES:

artificial lift methods, pumping, submergence, annulus, casing pressure, ejector, CFX.

PÁGINAS: 70
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Civil
RESUMO:

During the lifespan of an oil well, at some point artificial lift methods are required. Among these there are those that are called pumping methods, which use a bottomhole pump. Because of their working principle, these pumps are particularly sensitive to free gas, resulting in a decrease in its performance whenever it gets ingested. Therefore, the completion of those wells is made without packer and installing a gas separator at the suction of these pumps in order to redirect some of the free gas into the annulus. The annulus and the production line are connected via a check valve, allowing gas flow from the annulus to the production line whenever the casing pressure is higher than the wellhead pressure. However, in some cases the wellhead pressure is high enough, casing the gas to get trapped in the annulus, increasing casing pressure and therefore reducing pumps’ submergence. This dissertation intends to study one of the possible solutions to this problem, which came about as part of a partnership between Petrobras and UFRN, which is the installation of an ejector in the production line. Ejectors are devices that utilizes the energy of a motive fluid in order to suck a secondary one. In this particularly application, the well’s own production is used to suck the separated gas from the annulus. Throughout the text, a simplified mathematical model is developed in order to conduct performance analysis and design by using the basic principles of conservation of mass, momentum and energy for control volumes. This model was verified with the aids of computational fluid dynamics, where the software CFX from ANSYS version 16.0 was utilized.

MEMBROS DA BANCA:
Presidente - 1288120 - ADRIANO DOS SANTOS
Externo ao Programa - 1566922 - LINDEMBERG DE JESUS NOGUEIRA DUARTE
Externo ao Programa - 1714956 - RUTACIO DE OLIVEIRA COSTA
Externo à Instituição - BENNO WALDEMAR ASSMANN - PETROBRAS