Company
Apache Corp.
Devon Energy Corp.
EnCana Corp.
EOG Resources Inc.
ExxonMobil Corp.
Nexen Inc.
Quicksilver Resources
Taqa North Ltd.
Acreage
220,000
100,000
260,000
157,000
250,000
88,000
127,000
31,500

Source: PLSD Research, July 21, 2009