As gas operator on behalf of the Oman Government PDO has been active in a mature basin for ca 18 years. The traditional focus for gas exploration in the north has been on deep Haima reservoirs. These have been successfully targeted in a proven Haima silicilastic "play fairway" where all the classic play elements have been are recognised and areally defined in a target window of ca 4 - 5km. The approach has led to the discovery and development of a number of significant deep gas/condensate fields including: Barik, Saih Rawl, Saih Nihayda and Kauther. Periodic attempts (ca 5 year cycle) to move out of the fairway area based on a challenge of prior geological models, developed with new insights, have often led to disappointing results.