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this quality of data, both on land and offshore. But further
information lies within data recorded in the well using
wireline logging, logging-while-drilling, and well testing
properties. The integration of all available data within
WesternGeco, within the group, and, most importantly,
between Schlumberger and the customer is therefore
absolutely essential and is achieved through effective data
and model sharing via the Petrel platform.
The exploration workflow is less and less linear, with
iterative stages of model building through all of the first
four steps. Increasingly, this cannot be achieved without
a strong geological understanding, which demands inter-
pretation skill. Prospect generation is ultimately the job
of the customer. But that job is facilitated by the experts
from the Data & Consulting Services organization within
the Reservoir Characterization Group. Knowledgeable
and experienced in geological and geophysical interpreta-
tion, they ensure that Schlumberger seismic data and
models make sense in the geological context of the explo-
ration target, and that the customer and Schlumberger
speak the same technical language.
Incorporating Data from the Well
Seismic data shows us the large-scale architecture of a
field. From that broad view, WesternGeco GeoSolutions
extracts validated distributions of key petrophysical
parameters through seismic data inversion, which yields
critical information on reservoir continuity and formation
parameters across the prospect. This type of information
indicates how efficiently hydrocarbons may be produced.
But the magnitude of the decisions to be made based
on data from exploration and appraisal wells demands a
comprehensive evaluation of geology, geophysics, petro-
physics, and formation properties. That is why in addition
to WesternGeco GeoSolutions information, Schlumberger
offers a complete range of in situ measurements of rock
parameters and formation fluid technologies to provide
the data required for a complete interpretation.
The cornerstone of our advanced wireline logging port-
folio is the Scanner Family* rock and fluid characteriza-
tion services, introduced beginning in 2005. The family
now includes Rt Scanner* triaxial induction service for
the advanced evaluation of fluid saturations in complex
environments, the MR Scanner* magnetic resonance tool
for fluid typing and producibility analysis, and the Sonic
Scanner* acoustic imaging platform for measuring an
array of petrophysical, geomechanical, and geophysical
data. The Scanner* family of services continues to display
impressive growth, fueled by the expanding exploration
market. In 2010, the revolutionary Dielectric Scanner*
service joined the portfolio—not since the routine
commercial deployment of nuclear magnetic resonance
technology in 1995 has there been a more innovative
petrophysical service.
Dielectric Scanner technology measures the attenua-
tion and phase shift of electromagnetic waves across an
array of sensors and frequencies to characterize dielec-
tric dispersion at multiple depths of investigation into the
formation. This information is used to directly evaluate
water volume as well as investigate rock textural proper-
ties such as the complex pore geometry of carbonate
formations.
Other wireline logging measurements that bring sig-
nificant value to the evaluation of exploration wells
Measuring Fluid Properties
The fluids laboratory in
the Brazil Research and
Geoengineering Center is
one of several Schlumberger
facilities dedicated to the
study of liquid hydrocarbons
under controlled conditions.
Fluid Analyst Dania Lopez
checks viscosity measure-
ments of crude oil as part of
an evaluation program.
