Banca de DEFESA: ROMERO GOMES DA SILVA ARAUJO FILHO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : ROMERO GOMES DA SILVA ARAUJO FILHO
DATA : 23/03/2018
HORA: 14:00
LOCAL: Auditório do Laboratório de Cimentos do Instituto de Química
TÍTULO:

"Cement slurries for oil wells in fractured zones"

PALAVRAS-CHAVES:

ANOVA, cement, cementing, low-density slurries, vermiculite, fluid loss, fluid loss control.

PÁGINAS: 130
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Química
RESUMO:

Hydrocarbon deposits made up of oil and natural gas occur naturally throughout the world. Such deposits are usually contained within rocks called "reservoir rocks", usually sandstones or carbonates. These deposits exist in varying conditions of pressure, temperature and depth, from a few hundred to thousands of meters. During the process of drilling the oil well to reach the reservoir rocks it is common to find zones with high permeability or natural fractures when there is the possibility that some or all of the cement or drilling fluid is lost, that is: invade the formation being drilled and / or cemented without return. Such events are known in the industry as "fluid loss" may cause various undesirable effects, among them, loss of well control during drilling / completion or failures in the cementation, which may even lead to loss of the well or serious accidents. Commercially, there are alternatives for the development of cement slurry systems with loss of fluid control for the formation. However, most of these solutions have a high cost and low efficiency guarantee. Due to the reduction in the operating margins of the oil industry due to the reduction in the price of a barrel of oil, it is increasingly sought to optimize these processes, reducing costs and potential for failure. In this work, a set of statistical plans was carried out to jointly determine the best cement paste that could be developed with the materials used for loss control and, among these materials, how they would behave in the loss of fluid. The studied pulp was developed with vermiculite, calcium chloride and nanosilica, studying the action of vermiculite as a filtration controller. Besides this, polystyrene foam was also added to the pulp to also act as a loss controller. This composition had stable pastes with high water / cement ratio, excellent rheological properties and low densities, which were fixed at 12.5 lb / gal and optimal fluid loss control for training. Hydrothermal stability studies showed that the pastes were stable under these conditions, and mechanical strength tests showed values up to 10 MPa. The action of the foam contributed with the reduction of up to 97.5% of the loss of fluid to the formation, compared to other non-foamed pastes.

MEMBROS DA BANCA:
Externo à Instituição - BRUNO LEONARDO DE SENA COSTA - UFRN
Externo à Instituição - ERICA NATASCHE DE MEDEIROS GURGEL PINTO - UFERSA
Externo à Instituição - FABIOLA DIAS DA SILVA CURBELO - UFPB
Externo ao Programa - 1804366 - JÚLIO CÉZAR DE OLIVEIRA FREITAS
Presidente - 6347420 - MARCUS ANTONIO DE FREITAS MELO
Interno - 1979301 - RENATA MARTINS BRAGA