Abstract: Block 7-6 of Penglai is located in the southern part of Bodong low uplift structure, near the Bodong depression and Bozhong depression.The block is in the strike slip fault at the edge of Bohai, where the crustal stress was complex, abnormal pressure torsion prone to collapse, which affect the drilling time and acquisition of geological data. In view of the difficulty inwell drilling operation, wellbore structure was optimized, and drilling fluid system as well as performance was adjusted to meet the formation.Finally an ideal effect was achieved in drilling operationof Well PL7-6-2. This technique can be wildly used in the follow-up test wells and development wells in this block.