Banca de DEFESA: WILLIAN BARBOSA LIMA DO NASCIMENTO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : WILLIAN BARBOSA LIMA DO NASCIMENTO
DATE: 30/07/2021
TIME: 13:00
LOCAL: Remotamente pelo google meet
TITLE:

SYNTHESIS OF POLYMER NANOPARTICLES FOR APPLICATION IN CEMENT PASTE OF THE OIL WELL

KEY WORDS:

nanolatex, additive, cement, oil well cementing,

PAGES: 82
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Físico-Química
SPECIALTY: Química de Interfaces
SUMMARY:

New additives applied to wells cementing have been developed in search of more and more efficient paste systems for application in critical scenarios, especially those cases where the risk of gas migration is involved. The present work deals with the development of a new technology applied to the cementation of oil wells. A nanolatex sitentized from emulsion polymerization that contains polystyrene particles with a size of approximately 65.9 nm, containing solids content close to 19% and low PDI values (less than 0.160). These are particles that have proven effective as additives to cement pastes, particularly as filtrate controllers for well scenarios with a risk of gas migration. The nanolatex were named according to solids concentration, ranging from 15.80 % (seed 1) to 19.8% (seed 6). The nanolatex were characterized by gravimetry (analysis done to determine polymer conversion and solid content), dynamic light scattering (DLS - analysis of particle size and particle number), polydispersity index (PDI - analysis of the homogeneity of the particle size of the system), zeta potential (analysis of colloidal stability). The cement pastes were characterized by static filtration and rheological tests. The cement paste additivated with 1.0 gpc (gallon per cubic foot of cement) of seed 7 showed consistency below 30 UC up to 199 °F. The filtrate and plastic viscosity tests showed values within acceptable ranges for application in cementing operations, 44mL/30min and 112 cP, respectively. Based on the results, the developed nanolatex presents itself as a potential additive for application in oil wells with fluid-loss and gas migration risk.

BANKING MEMBERS:
Externo ao Programa - 1753094 - ALCIDES DE OLIVEIRA WANDERLEY NETO
Externa à Instituição - FABÍOLA DIAS DA SILVA CURBELO - UFPB
Externa ao Programa - 2212519 - JULIANA DE SOUZA NUNES
Presidente - 1804366 - JÚLIO CÉZAR DE OLIVEIRA FREITAS