Much newer technology than fracturing, horizontal drilling can stimulate production and increase the ultimate recovery of reserves. This is accomplished by drilling a hole horizontally from a vertical well bore to effectively extend the well bore's "reach" into closer proximity to previously untapped or partially depleted areas of the reservoir.

Conventional horizontal drilling utilizes a specialized, steerable drill bit capable of drilling multiple holes up to 5,000 feet horizontally at depths down to 13,000 feet.

In its Bypassed Resource projects, Evolution will either drill new vertical wells or re-enter existing wells in order to then drill horizontally. New wells typically result in the drilling of one or two horizontal holes, each extending as much as 4,000' laterally. Re-entries may include the drilling of a single shorter lateral to capture undrained fractures, which are economic due to the lower drilling cost of a re-entry.