Abstract: The rig KantanⅡhad completed 37 exploration wells in Shengli offshore area,and the total footage was 111948.44 meters from May 1992 to January 2003. Based on the analysis of the formation characteristic and operation difficulties,the paper introduces some measures of improving drilling rate and reducing drilling cost by optimizing drilling and cementing technologies and choosing reasonable drilling fluid in Shengli offshore area,as well as provides good experiences for exploration and development in the area in the future.