VANCOUVER, BRITISH COLUMBIA — (Marketwire) — 08/15/11 — Portal Resources Ltd. (TSX VENTURE: PDO)(FRANKFURT: P5H) is pleased to announce that it has established oil production through a five-well drilling program targeting the Birdbear formation at its Salt Lake Project in West Central Saskatchewan. Planning for additional wells is now underway.Salt Lake Project – Oil Production EstablishedPortal has now drilled and completed two horizontal wells, one vertical well and two well re-entries at