Bohai is the most important crude oil producing area for the Company. The crude oil produced in this region is mainly heavy oil. As of the end of 2012, the reserve and daily production volume in Bohai were 1,165.9 million BOE and 432,285 BOE/day, respectively, representing approximately 33.4% and 46.2% of the Company¡¯s total reserves and daily production, respectively. The operation area in Bohai is mainly shallow water with a depth of 10 to 30 meters.
Bohai has rich oil and gas resources and has been one of the Company¡¯s primary areas for exploration and development. In recent years, the Company has made several commercial discoveries in this region each year. In 2012, the Company made seven successful discoveries in Bohai, namely Penglai 15-2, Qinhuangdao 27-3, Luda 21-2, Kenli 2-1, Luda 6-2, Bozhong 34-1 North and Caofeidian 21-3. In addition, the Company also successfully appraised seven oil and gas structures, namely Penglai 9-1, Qinhuangdao 29-2 East, Luda 6-2, Qinhuangdao 33-3, Penglai 15-2, Bozhong 34-1 North and Kenli 9-1.
Benefiting from the new discoveries and successful appraisals, crude oil reserve replacement ratio reached 144% in Bohai, reflecting Bohai¡¯s potential as the core production region for the Company.