8
Integration of downhole
measurements and samples
to calibrate the digital with
the physical confirms
understanding of the reservoir.
induction service for fluid saturation evaluation,
MR Scanner* expert magnetic resonance service for
fluid typing and producibility analysis, and the Sonic
Scanner* acoustic imaging platform for petrophysical,
geomechanical, and geophysical measurements. The
family has recently expanded with the exclusive
Dielectric Scanner* multifrequency dielectric disper-
sion service to directly evaluate water volume and
investigate rock textural properties and Litho Scanner
high-definition spectroscopy service to determine com-
plex mineralogies and lithologies, particularly in
unconventional reservoir development.
The Saturn 3D radial probe is the latest advance in
Wireline technologies that measure reservoir pressure
and recover reservoir fluid for downhole fluid analysis
(DFA) or laboratory analysis. With a surface flow area
totaling nearly 80 in
2
—a 1,200% increase over the
largest conventional single-probe formation tester—
the Saturn probe extends formation testing to the pre-
viously inaccessible fluids and reservoir environments
of low-permeability formations, heavy oil, unconsoli-
dated formations, near-critical fluids, and rugose bore-
holes. Real-time DFA conducted on the extracted fluid
with the InSitu Fluid Analyzer* system provides the
means to accurately determine the connectivity of
hydrocarbon accumulations by evaluating the optical
density and compositional variation of the crude oil.
Knowledge of reservoir connectivity is critical in deep-
water developments.
In situ fluid analy-
sis does not, however,
replace the need for
well testing, another
Schlumberger leader-
ship technology, which provides information about
reservoir-scale fluid connectivity and boundaries to con-
firm reservoir shape and size. Testing Services technolo-
gies obtain representative pressure measurements and
reservoir fluid samples far from the wellbore to deter-
mine the volume of hydrocarbon reserves in place.
Schlumberger’s position at the forefront of reservoir
characterization technologies results from integrating
individual innovations in sensor design, downhole elec-
tronics, surface systems, high-resolution recording
capability, and sophisticated data handling and work-
flow process software. Addressing all these aspects
enables making the same high-quality measurements
no matter how the sensors are conveyed—on wireline,
drillpipe, slickline, or coiled tubing—or on whichever
measurement platform they are employed. For exam-
ple, measurements of reservoir pressure made during
the exploration phase by the sensors in the Wireline
InSitu Fluid Analyzer system are more easily integrated
with subsequently acquired pressure measurements by
deploying the same type of sensors on Testing Services
drillstem testing equipment, WellWatcher* downhole
permanent monitoring systems, and Intellizone*
modular zonal management systems.
Geologist Barbara Hill evaluates an image of a
reservoir rock sample using a scanning electron
microscope at the Schlumberger Reservoir
Laboratory in Houston.
