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JOURNAL OF PETROLEUM TECHNOLOGY OCTOBER 2010

An Of f icial Publication of the Society of Petroleum Engineers www.spe.o rg

Field

DevelopmentProjects

Tight Reservoirs

KnowledgeManagementand Training

Sand Managementand Frac Pack

Promising SubseaDevelopments

R&D and theRise of NOCs

Sand Control Reliability

SPECIAL FEATURES

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Dielectric ScanningSchlumbergersDielectric Scanner (Fig. 2)is the new-

est of the companys wireline tools.The scanner is a multifrequency dielec-tric dispersion tool offering a newpetrophysical measurement. By use ofsignal-dispersion technology, togetherwith state-of-the-art processing, inter-preters can estimate pore-fluid androck-texture information with greataccuracy, independent of pore-fluidsalinity. As a result, precise saturationcalculations can be made in carbonates,in shaly sands including thin beds, inlow-contrast pays, and in heavy-oil

sands containing fresh water. An artic-

ulated sensor pad on the tool ensuresaccurate, repeatable measurements in

either water-based or oil-based mud.The borehole-compensated combina-tions of transmitter-to-receiver mea-surements at four radial spacings,operating at four different frequenciesand two axial orientations, thoroughlycharacterize pore-water volume, andpinpoint the Archies textural param-eters. The tools intrinsic high verticalresolution enables characterizing bedsas thin as 1 in.

For additional information, visitwww.slb.com/ds.

Dennis Denney, JPTSenior Technology Editor

TECHNOLOGY APPLICATIONS

Fig. 2A Schlumberger engineer inspects the Dielectric Scanner antenna-array pad before running the service in a heavy-oil well in South America.

22 JPT OCTOBER 2010

JPT

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