Clariant Oil Services Doubles Production to 355 Mscfd via Backside Foamer Batch Treatment

Benefits

• Enhanced flow maintained for 7 days before slowly decreasing to pre-treatment levels
• Production in this low pressure gas well doubled with batch treatments of WellBoost 108 every two weeks
• WellBoost 108 has a freezing point below -40°C (-40°F)
• Careful design and optimization of well enhancement program by Clariant Oil Services, in close collaboration with lease operators 

Background

Excess water production in a gas well can cause a hydrostatic overbalance in the system, resulting in a loss of production. Gas well production can be enhanced when chemical deliquification is applied. Liquid foamer can be introduced to the fluid column to form managed foam, enabling water and even condensate removal.

This particular well in Northern Alberta operated at a very low pressure of approximately 200 kPa (29 psi) and produced 5 e3m3/day (177.5 Mscfd). At these low pressures and production rates the well was very sensitive to water production – it took only a small amount of fluid to dramatically affect production.

Laboratory work performed by Clariant Oil Services was initially conducted to identify a suitable liquid chemical foaming agent for field application. Yet this test work identified not only the chemistry, but also derived a half-life versus chemical concentration curve to enable effective field optimization. This is the typical attention-to-detail that exemplifies the added service Clariant Oil Services delivers to its customers.

Clariant Oil Services Solutions and Value Delivered

Upon application of a 20-liter batch of WellBoost™ 108 down the well annulus, gas production increased from just under 5 e3m3/day (177.5 Mscfd) to over 10 e3m3/day (354.9 Mscfd). The production increase remained for one week before slowly declining (see graph below). Two weeks after treatment, the benefit declined fully and re-treatment was required.

The chemical cost was insignificant compared to the additional 50 e3m3 of gas produced over the course of a single treatment. Likewise, due to the well’s response to the batch treatment, it has been proposed to put it on continuous treatment to gain the incremental production benefit all the time and lessen the operational strain of batch treatment.

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* Previously sold as SURFTREAT® 8553