In a Q2 operations update, Kodiak Oil & Gas (NYSE:KOG) reports average daily sales volumes of 23.2K boe/day, an 83% increase Y/Y and 8% Q/Q. Completed 25 gross operated wells in Q2; expects to complete 30 operates wells in Q3. Estimates average daily production of 30K-34K boe/day for FY 2013. Raises FY 2013 estimated capex to $950M-$1B. KOG +0.2% premarket.