Banca de QUALIFICAÇÃO: DAVID WENDELL TOMAZ DA SILVA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : DAVID WENDELL TOMAZ DA SILVA
DATA : 18/12/2018
HORA: 09:30
LOCAL: Auditório do departamento de Geofísica
TÍTULO:

Characterization of seismic ambient noise in an oil field

PALAVRAS-CHAVES:

Characterization of noise; oil field; ambient seismic noise; source illumination 

PÁGINAS: 38
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Geociências
RESUMO:

We characterized the ambient seismic noise in an oil field during hydraulic fracturing, using integration of data analyzes in frequency domain, FK beamforming and seismic interferometry. We observe that the events of microsseismicity induced in the subsurface produced by the hydraulic fracturing are obliterated by noise of surface waves of greater energy. We have shown that the lack of light from sources that contribute to the recovery of the Green Function (FG) produces correlograms with spurious events that need to be removed by further processing. We find that the weighted phase stacking provides a correlogram with better signal to noise ratio (SNR). We have seen that the use of the FK filters and the application of Linear moveout (LMO), allowed the improvement of the signal noise ratio in the data. Finally, through the results obtained, we identified a surface wave with velocity of 1.3 km / s and we conclude that in the survey area the surface geological environment is homogeneous.

MEMBROS DA BANCA:
Presidente - 1451214 - ADERSON FARIAS DO NASCIMENTO
Interno - 349684 - WALTER EUGENIO DE MEDEIROS
Externo à Instituição - FLAVIO LEMOS DE SANTANA - UFRN