The discount on Canadian heavy crude tightened on Tuesday:
* Western Canada Select (WCS) heavy blend crude for August delivery in Hardisty, Alberta, settled at $11.70 per barrel below West Texas Intermediate (WTI) oil, according to Net Energy Exchange. On Monday, WCS for August delivery settled at $12.05 a barrel below WTI crude futures.
* One industry source said trading volumes were reasonably strong despite many industry players attending events at the Calgary Stampede, a 10-day rodeo in Canada's corporate oil capital that kicked off on Friday.
* Data from energy information provider Genscape on Monday showed Western Canadian crude inventories declined slightly in June to 30.5 million barrels, helping support prices.
* The government of Alberta, Canada's main crude-producing province, has capped oil production for August at 3.74 million barrels per day, easing curtailments from 3.71 million bpd in July.
* Senior executives from some of Canada's largest energy companies on Tuesday said they are in talks with the Alberta government about easing curtailment limits as long as companies can move the extra crude by rail.
* Light synthetic crude from the oil sands for August delivery settled at 90 cents per barrel over U.S. crude, down slightly from Monday's settle of $1 per barrel over WTI.
* U.S. oil futures rose 17 cents to settle at $57.83 a barrel, supported by Middle East tensions and OPEC supply cuts.
(Reporting by Nia Williams in Calgary, Alberta Editing by Matthew Lewis)