Calgary-based Encana Corporation ranked at the bottom of a list of 28 mostly American oil companies, tied with Cabot Oil & Gas Corp. with a score of zero, for methane management disclosures.

At the top of the list, with 12 of a possible 13 points, were Apache Corporation, BHP Billiton, and Southwestern Energy. Royal Dutch Shell, ConocoPhillips and Hess Corporation earned 11 points each.

Read more in JWN Energy.