Petrobank Energy and Resources Ltd. (Petrobank) is engaged in the exploration and development of oil and natural gas in western Canada. The Company operates in two segments: the Heavy Oil Business Unit (HBU) and PetroBakken Energy Ltd. (PetroBakken). Its operations are conducted through its HBU, as well as its technology subsidiary, Archon Technologies Ltd. The HBU operates its heavy oil projects using Petrobank�s THAI heavy oil recovery process in the field. In addition, Petrobank owns 59% of its subsidiary, PetroBakken. Whitesands Insitu Inc., a wholly owned subsidiary of the Company, owns heavy oil leases in Alberta and oil sands and heavy oil licenses and leases in Saskatchewan, and operates the Kerrobert Project. During the year ended December 31, 2011, Petrobank completed the Kerrobert Project, with all 10 expansion well pairs drilled. On February 28, 2012, Petrobank completed the sale of May River Property.