In 2013, we grew our proved plus probable reserves by 17%, to 406 MMBOE.
This represented a 284% production replacement through our drilling and acquisition activities.
Reserves are presented on a company interest basis at year end, in accordance with National Instrument 51-101, based on evaluations from third party reserves engineers.
Based on company-interest reserves at December 31, 2013 *CAGR: compound annual growth rate
Our "best estimate" of contingent resources is 363 MMBOE. This estimate includes the Marcellus, the Bakken and Three Forks, a portion of our Waterfloods and our Wilrich assets.
We believe there could be further upside associated with the Duvernay, increased density in the Bakken and the potential of the lower benches within the Three Forks in North Dakota.
At our current production rate for 2014, this resource estimate would provide approximately 10 years of organic reserve replacement.