MELBOURNE (Standard&Poor's) Dec. 15, 2009--Standard&Poor's Ratings Services today said that its 'A-' corporate credit and associated debt ratings on Woodside Petroleum Ltd. remain on CreditWatch with negative implications following Woodside's announcement of a fully underwritten entitlement offer to raise about A$2.5 billion. However, the 'A-' ratings on Woodside are likely to be affirmed, with a negative outlook, if the equity issuance is completed as planned. The ratings were initially placed on CreditWatch on Nov. 20, 2009 after Woodside announced additional costs to complete the company's Pluto foundation project. "In our opinion, Woodside's planned equity raising will improve the company's liquidity position, alleviate pressure associated with cost overruns at its Pluto project, give the company's balance sheet