World Oil: Subsea-certified black oil foamer solves production issues in deepwater wells

reduction in bottomhole pressure, as they follow their natural decline curve. The decrease in lifting force leads to liquidloading in the tubing and flowline. This build-up in hydrostatic pressure reduces production rates faster than natural decline.

TIM GARZA, Baker Hughes Incorporated

A number of technologies are available to bring liquids to surface, thus reducing hydrostatic pressure and keeping production flowing at economical rates. Commonly used deliquification technologies include artificial lift systems, such as gas/ plunger lifts and electrical submersible pumps (ESP). These are all effective, but capital-intensive solutions.

Surfactant-based foamers offer a cost-effective treatment alternative to artificial lift as a means of de-liquefying wells. Foamers help remove liquid from a well by reducing the minimum velocity required to unload the liquid, known commonly as the gas critical velocity. The magnitude of this velocity is impacted by two major physical properties of the liquid—its density and its surface tension. By reducing both liquid surface tension and density, foamers subsequently reduce critical velocity.

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