NY -- Standard & Poor's CreditWire 2/13/97 -- Standard & Poor's today has placed its triple-`B'-plus corporate credit and senior unsecured debt ratings of Talisman Energy Inc. on CreditWatch with positive implications. The CreditWatch placement follows Talisman's announcement that it has made a C$1.5 billion unsolicited bid to acquire Saskatchewan-based Wascana Energy Inc. Additionally, approximately C$200 million of Wascana debt will be assumed. Wascana is a medium-sized oil and gas producer with daily production in the third quarter of 1996 of 52,000 barrels of liquids and 204 million cubic feet of gas concentrated in Saskatchewan and Alberta. The company estimates that the acquisition would increase Talisman's 1997 liquids production to about 175,00 barrels per day and gas production to about