Oil and gas accumulation and exploration potential in the TangzhuangOil Field, Shandong

The Tangzhuang Oil Field located at the westernmost part of the central uplift of the Huimin depression in the Jiyang down-warped region, Shandong has been an important oil and gas exploration area for many years:an anticline pool from the 1960s to the 1990s, and a fault-block pool and stratigraphic unconformity pool since 1992. Five exploration horizons have been identified in the third member of the Eocene (Paleogene) Shahejie Formation and Miocene (Neogene) Guantao Formation. The present paper deals, in detail, with oil source rocks, geological tectonics and structures, reservoir rocks, types of oil pools and accumulation within the oil field. A variety of oil pools are recognized, including anticline pool, fault-block pool, structural-lithologic pool and stratigraphic unconformity pool. They are scattered from the first to third members of the Shahejie Formation and connected together, constituting a typical composite oil pool within the Shengli oil province.