Scott Sheffield, Chairman and Chief Executive Officer of Pioneer Natural Resources Company, speaks to guests and investors during the OGIS conference for mid- and small-tier oil and gas companies in ... more 
Scott Sheffield, Chairman and Chief Executive Officer of Pioneer Natural Resources Company, speaks to guests and investors during the OGIS conference for mid- and small-tier oil and gas companies in New York, April 8, 2014. REUTERS/Eduardo Munoz (UNITED STATES - Tags: BUSINESS ENERGY) less 
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Reuters | Photo By EDUARDO MUNOZ / REUTERS
Tue, Apr 8, 2014 2:44 PM EDT