Private equity heavyweight Quantum Energy Partners last week launched Rocky Mountain-focused Middle Fork Energy Partners LLC, co-founded by former Encana Corp. executives.

Denver-based Middle Fork, with initial capital commitments of $200 million-plus, is headed by CEO Christopher L. Valdez and Executive Chairman Jeffrey E. Wojahn.

Valdez most recently served as vice president (VP) of marketing/planning for Vantage Energy LLC, a Quantum portfolio company that was sold last year to Rice Energy Inc. for $2.7 billion. Before heading up Vantage Energy, Valdez was an executive with Encana Oil & Gas (USA) Inc. including as VP, planning and asset manager of the Piceance Basin. Wojahn, with 30 years of experience in the energy industry, was president of Encana’s USA unit from 2006 to 2013.