The Reservoir-Formed History and Mechanism of Tahe Oilfield in Tarim Basin.

The reservoir forming stages with different properties of crude in Tahe oilfield are believed to originate from the late Hercynian movement and lasting to Himalayan Movement.It can be divided into the late Hercynian,Yan-shan-early Himalayan and late Himalayan movements,through analyses of the traping stages of different blocks and horizons of hydrocarbon reservoirs as well as their hydrocarbon-input stages.The reservoir-formed mechanism in Tahe oilfield is characterized by long terms of continuous crude supply,multi-horizon effective reservoir-seal assemblages,multistage formation of reservoirs and complicated hydrocarbon occurrences.