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   You are here: SLB.com > Products & Services > Production Optimization > Logging > Flow Scanner


Flow Scanner

Oilfield Review Interactive


Oilfield Review InterACTIVE

Analyzing Multiphase Flow in Horizontal and Deviated Wells
Production logging can now be done in horizontal and deviated wellbores using a new tool with five minispinners and 12 phase probes.



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A maneuverable arm deploys sensors along the vertical axis of nonvertical wells, letting you calculate velocity and holdup measurements in mixed and segregated flow regimes.


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A conventional spinner, left, only measures flow in the center of the wellbore. The Flow Scanner spinners measure flow at five points across the vertical axis of the wellbore, enabling you to calculate the multiphase velocity profile.


An innovation in production logging
Flow Scanner horizontal and deviated well production logging system is optimized for three-phase production logging, giving you a complete flow analysis of complex downhole environments. Conventional production logging tools, developed for vertical or near-vertical wells, cannot give effective answers when confronted with the complex flow environment of highly deviated wells.

The system runs eccentralized or against the wellbore wall. Innovative electrical probes distinguish water and hydrocarbon holdup. Optical probes differentiate gas and liquid holdup. These results allow you to measure a full three-phase holdup.

The tool measures phase velocity used to calculate a multiphase velocity profile. When combined with the holdup profile, you can calculate multiphase flow rates in real time, maximizing well production.

Fully combinable with other cased hole logging tools, the system operates in temperatures and pressures up to 300°F and 15,000 psi. The system can be run in hole sizes ranging from 2 7/8-in. to more than 9-in. on wireline, coiled tubing, or as an integral part of our MaxTRAC downhole well tractor system.

An exact production profile
Flow Scanner has been tested in the Middle East, the North Sea, and West Africa. In the Gulf of Suez, an operator found that conventional production logging tools failed to see oil entries because of adverse effects of highly viscous oil and unstable slugging from a 37° well flowing about 2,000 BOPD with a 97% water cut.

To rework the well, the operator needed an accurate production profile showing the precise location of the oil and water entries. After running Flow Scanner, the operator obtained a reliable, inflow profile, free from the unfavorable effects encountered previously.

In another Middle East example, Flow Scanner identified water recirculation along the wellbore completion to around 100 feet from surface. The operator conducted a workover to circulate out these remnant completion fluids, effectively unchoking the well and significantly increasing hydrocarbon production.


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