The curtailment in Alaska production follows closely in the same week as a shutdown of Canadian Natural Resources Ltd.'s (NYSE: CNQ )110,000-barrel-a-day Horizon oil sands project after a fire on January 6. According to Philip Skolnick, an analyst at Canaccord Genuity Corp. the explosion reduces oil production by about 15 percent for Canada's second-biggest energy company by market capitalization. The accident could reduce the company's pretax cash flow by as much as $892 million if operations at the plant are halted for six months.