www.deloitte.com/us/about for a detailed description of the legal structure of Deloitte LLP and its subsidiaries. Certain services may not be available to attest clients under the rules and regulations of public accounting. (PRNewsFoto/Deloitte)" border="0" />HOUSTON, April 11, 2018 /PRNewswire/ -- Despite crude oil prices rising 25 percent since January 2017 and significant productivity gains made in recent years, shareholder returns on average for upstream companies have still been negative – even for those operating in the Permian Basin hot...