Banca de QUALIFICAÇÃO: ROMERO GOMES DA SILVA ARAUJO FILHO

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE : ROMERO GOMES DA SILVA ARAUJO FILHO
DATA : 29/12/2017
HORA: 14:00
LOCAL: AUDITÓRIO DE CIMENTO DO INSTITUTO DE QUÍMICA
TÍTULO:

"DEVELOPMENT OF A CEMENT SLURRY SYSTEM FOR CEMENTING 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:

The occurrence of natural and man-made fractures in geological zones of interest for the petroleum industry is a problem that affects companies all around the globe. In addition to the fractures, high permeability zones can also offer many challenges during both the drilling and completion processes. In these cases, there is a high chance that some or all of the cement or drilling fluid used is lost within the formation, that is: enters the formation being drilled and / or cemented. Such events, known in the industry as "fluid loss" may cause several undesirable effects, including among them: loss of well control during drilling / completion; failures in the cementation; loss of the well or even lead to serious accidents. Commercially, there are alternatives for the development of cement slurry systems with fluid loss controllers. However, most of these solutions have a high cost and low efficiency rate. Considering the reduction in the oil  barrel price in the international market, cost-efficient initiatives are being more looked for in the oil industry. 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 slurry 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. 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-added pastes.

 

MEMBROS DA BANCA:
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