Over the past few years, a new multi-stage, multi-jet fracturing technology has improved the acid fracturing of the Wabamun formation located in south central Alberta.

The Crossfield member of the formation, found in the Swallwell field, has a large original oil and gas reservoir with low recovery factors to date of 2.4% for oil and 5.2% for natural gas. A 1% increase in recovery factors would yield an additional 875,000 bbls and 851,000 mcf of gas.

Use of multiple mechanical isolation points in the new technology has demonstrated average initial production increases of 77 to 102% and final production increases of 12 to 28% compared to historical wells. The micro to very fine crystalline dolomite of the Crossfield member has average permeability ranges from 0.1 and 0.3 mD; therefore, acid stimulation is required in order to economically extract the resource.

This paper will discuss the planning and design processes that led to the implementation of the multi-stage, multi-jet technology. It will outline the lessons learned during deployment of the completion, and will highlight the stimulation treatment execution and post-stimulation results. The text will detail examples from the case studies and will outline the benefits of this technology.

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