CALGARY, ALBERTA--(Marketwire - Dec. 13, 2012) - Bonterra Energy Corp. (TSX:BNE) (Bonterra) and Spartan Oil Corp. (Spartan) announce they will host a conference call and webcast on December 17, 2012 at 8:30 a.m. Mountain Standard Time (10:30 a.m. Eastern Standard Time) to discuss the Definitive Agreement whereby Bonterra has agreed to acquire all of the issued and outstanding common shares of Spartan and address investor questions.

Conference Call Details:

An archived recording of the conference call will be available until December 24, 2012 by dialing toll-free 1-800-408-3053 (Toronto local dial 905-694-9451) and entering pass code 1312324. The conference call will also be archived on the Bonterra website at [ www.bonterraenergy.com ].

Through the combination, Bonterra and Spartan will hold an enviable suite of light-oil assets concentrated in the Pembina region, which will be comprised of a complimentary production base and a long-term inventory of drilling opportunities that is anticipated to drive future growth. Bonterra, as demonstrated by its past track record of increasing dividends and year-over-year growth on a per share basis, has shown a strong ability to manage Pembina Cardium assets to provide measured production growth while providing a sustainable dividend to its shareholders. Bonterra's common shares are traded on the Toronto Stock Exchange under the symbol BNE.

For further information about Bonterra, please visit our website at [ www.bonterraenergy.com ].

Publication Contributing Sources

• Market Wire