Schlumberger

Case Study: Enable Recovery of Expensive Brine

CleanPhase well test separator with SmartWeir technology allowed Total to save USD 350,000 in an HPHT completion

Challenge: Recover a very expensive specialty completion fluid for reuse.

Solution: Use a CleanPhase well test separator with SmartWeir phase separation technology to handle high volumes of water and brine without plugging.

Result: Schlumberger was able to recover 100 bbl of cesium formate brine, saving USD 350,000 for Total.

Total elected to use a high-density completion brine for hydrostatic control in the high-pressure, high-temperature (HPHT) F9 well in the Franklin field offshore Aberdeen.

Operator wanted to be able to reuse the cesium formate brine

Total knew that it would not be possible to recover wellbore fluids during the initial stages of well cleanup with a conventional separator, and it wanted the very expensive cesium formate brine to be available for reuse.

Total challenged Schlumberger with implementing a solution that would allow it to recover the brine solution and enable efficient fluids disposal.

CleanPhase separator with SmartWeir technology proved to be the answer

The CleanPhase well test separator separates the three fluid phases efficiently, measures each phase accurately, and disposes of separated effluents in an environmentally friendly manner. It uses SmartWeir phase separation technology that dynamically handles high volumes of water and brine and optimizes water retention time, enabling the CleanPhase separator to be on line during cleanup.

Because the Coriolis meters in CleanPhase separators measure mass flow rate rather than volumetric flow, they are not affected by variances in fluid density, viscosity, pressure, or temperature—and they do not plug with debris as positive displacement or turbine meters are inclined to do. Therefore, production can be flowed directly through the CleanPhase separator, and the Coriolis meters measure the flow of each phase at the separator outlets.

CleanPhase technology enables more efficient testing, cleanup, and effluent disposal, thereby reducing rig time and costs, environmental impact, and production uncertainty.

Total saved USD 350,000 through brine recovery

Because SmartWeir technology allowed the CleanPhase separator to be on line during cleanup, Schlumberger was able to recover 100 bbl of cesium formate brine for Total, for a savings of USD 350,000.

This job marked the first time that a Coriolis meter was used to measure flow in the Franklin field, but not the last. Total decided to use the CleanPhase separator with SmartWeir technology on its next well test operation.
 


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