DUNE RESOURCES <DNLAF> RESERVES ROSE IN 1986 Dune Resources Ltd said its oil reserves increased 225 pct during 1986 while its natural gas reserves were up six pct. The company said its proven oil reserves were estimated at 605,682 barrels on December 31, up from 186,655 barrels a year earlier boosted by discoveries during the year put at 423,659 barrels. It said gas reserves rose to 8.8 mln cubic feet from 8.3 mln on Dec 31, 1985, as discoveries of nearly 1.3 mln cubic feet were partialy offset by production of 287,391 cubic feet and downward revisions of previous estimates totaling 491,694 cubic feet.