Petroleum News.  August ANS production down 11% from July - 09/06/2015 (Login to read Full story) Alaska North Slope production averaged 418,127 barrels per day in August, down 10.6 percent from a July average of 467,922, with all fields down substantially Aug. 21-22 during Alyeska Pipeline Service Co.'s second planned maintenance shutdown of the summer. Alyeska spokeswoman Michelle Egan said w....