A solution to pumping heavy oil seems to be at hand following the successful testing of Proflux technology by Oilflow Solutions Ltd. of Aberdeen, Scotland. In a two-phase trial conducted in Albania's Patos Marinza heavy oil field, Proflux 200 was injected into a surface flow line to improve flow efficiency between the wellhead and a field gathering station. In the second phase, the formula was pumped down the well annulus to mix with produced crude oil at the progressing cavity pump. In both cases crude oil viscosity was reduced two orders of magnitude from 40,000 cp to 200 cp. The surface phase test produced a 40% drop in wellhead pressure, and the downhole phase test resulted in a 40% reduction in pump torque.
Unlike other viscosity-reducing chemicals, Proflux creates a dispersed solution of coated oil droplets that resembles oil balls in aqueous suspension. This achieves the principle objective of viscosity reduction and adds an important benefit. The chemical can be retrieved for recycling using standard oilfield gravity separation just as produced water is removed. Following separation, residue is less than 0.5% basic sediment and water (BSW). According to the company, other systems require applications of chemical breakers and heat to separate the solvent from the crude that is difficult and costly.
A second formulation, Proflux 300, can be used to stabilize waxy crudes, allowing them to be pumped well below their original pour point temperature. Full commercialization for Proflux products is expected this year.
For more information, including a downloadable video demonstration of the Proflux process, visit www.oilflowsolutions.com.

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