Each borehole seismic technique has its advantages in imaging the
subsurface, but the high resolution obtained using crosswell seismic imaging
allows for a detailed survey of the reservoir. These results are enhanced when
acquiring multiple profiles permitting a view of the entire field in two and
Petrobras supported a research project, with the technical participation
of UFBA to evaluate for the first time in Brazil, the different aspects of
crosswell seismic through surveys carried by Schlumberger in Dom João (5
profiles) and Miranga (1 profile) fields, respectively, in October and November
2011. The target of this project was to investigate the response of Sergi and
Catu formations to crosswell method, and secondarily provide, on Miranga field,
a baseline velocity image to monitor a future CO2 sequestration project. This
study focuses on the processing steps that allowed for the production of
crosswell seismic images for the five profiles acquired in the Dom Joao field
and its preliminary interpretation.
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