LONDON, June 15 - A framework agreement between the U.S. and Iran on terms to end their war and reopen the Strait of Hormuz sent oil prices tumbling, as traders anticipated the return of flows.

But industry officials say a full return to pre-war production and refining levels is likely to take weeks, months or even years.

The following explores the main energy implications of the tentative deal.

WHAT DOES THE DEAL CHANGE IMMEDIATELY?