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At December 31, 2012, the Company owned or controlled approximately 114,569 gross acres, or 41,077 acres net its interest in Riverbend Project.  Riverbend is a statistical play yielding predictable reserve adds marked by low geologic risk. The key to the project is in leveraging proven drilling and completion technologies, in particular stage fracing techniques, to best recover the gas in place.

Historically, Gasco’s engineering and geologic efforts focused on three tight-sand formations in the Uinta basin: the Wasatch, Mesaverde and Blackhawk formations.  A typical well drilled into these formations may encounter multiple, distinct natural gas sands located between approximately 6,000 and 13,000 feet in depth that are completed using up to 10 staged fracture stimulations.  During 2006 and into 2007, increased industry activity to the deeper Mancos shale began to occur.  Initial results derived from public data are encouraging.

Gasco Energy, Inc. 7979 E. Tufts Avenue, Suite 1150, Denver, CO 80237 • Phone: (303) 483-0044 Fax: (303) 483-0011