Devon Energy Converts to Successful-Efforts Accounting Method

OKLAHOMA CITY–(BUSINESS WIRE)–Devon Energy Corp. (NYSE: DVN) announced today that during the fourth
quarter of 2017, the company changed its method of accounting for oil
and gas exploration and development activities from the full-cost
methodology to successful efforts.

Fourth-quarter and full-year 2017 results, which will be released Feb.
20, 2018, will reflect this accounting change. The company will provide
more detailed information related to its conversion to successful
efforts in its fourth-quarter and full-year 2017 earnings materials,
including a reconciliation of financial results from full cost to
successful efforts for prior financial reporting periods.

"The conversion to successful efforts accounting is one of many
shareholder-friendly initiatives underway at Devon," said Jeff Ritenour,
chief financial officer. "We believe the conversion to successful
efforts will provide greater transparency into our financial
performance, allowing us to better showcase the top-tier returns we’re
achieving with our disciplined capital program."

About Devon Energy

Devon Energy is a leading independent energy company engaged in finding
and producing oil and natural gas. Based in Oklahoma City and included
in the S&P 500, Devon operates in several of the most prolific oil and
natural gas plays in the U.S. and Canada with an emphasis on achieving
strong returns. For more information, please visit www.devonenergy.com.

Contacts

Devon Energy Corporation
Investor Contacts
Scott Coody,
405-552-4735
Chris Carr, 405-228-2496
Media Contact
John
Porretto, 405-228-7506