Industry Article: Systematic Candidate Selection Improves Haynesville Refracturing Economics

Haynesville refracturing
Publication: World Oil
Publication Date: 12/01/2015

Refracturing represents a viable alternative to drilling new wells only in areas of good reservoir quality where producers are underperforming, and net payback from incremental production meets an operator’s hurdle rate within a specified time period. A full refracturing workflow consists, ideally, of four phases: diagnose, design, execute, evaluate. 

To diagnose existing laterals with greater economic potential, Schlumberger developed a systematic candidate selection and design workflow as part of its BroadBand Sequence fracturing service for unconventional plays. Key criteria include the well’s age, cluster spacing, reservoir quality, initial production rate, drawdown rate, well spacing, and initial proppant volume. 

Based on analysis of public data, the Haynesville play has about 270 superior and 775 good refracturing candidates. Refracturing one of its lowest producing wells in the play, Encana increased gas production from 100,000 scf/d to 2.7 MM scf/d, and five-year cumulative production rose an estimated 1.0 Bscf—for one quarter of the original cost to drill and complete the well.

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