Abstract: In view of the high exploration and development degree, the great number of oil bearing series, and the great difficulty in trundle development of reservoirs in complex fault blocks of Kongnan area, Huanghua Depression, the idea of carrying out fine trundle research on the plane and profile is proposed in this paper. Three analyses and five evaluations conducted on the plane, the reservoir reexamination and increase in reserves on the profile are illustrated as well. The method has been applied to the field successfully and can be good reference to the fine trundle research on complex fault blocks in Bohai Bay area

Key words: Huanghua Depression, complex fault block, oil source fault, trundle development, oil layer reexamination