Its London office will spearhead work on the account, bagging annual fees understood to be worth around £3m.
B-M, meanwhile, is to promote the new corporate entity – created earlier this year from the merger of Shell Transport & Trading and Royal Dutch Petroleum – to shareholders, media, NGOs and government agencies worldwide.
The company is keen to boost its image following last year's oil reserves scandal .
The account is likely to bring in at least £1m per year for B-M. Both Edelman, which will start work next month, and B-M were still thrashing out contractual details with Shell as PRWeek went to press.