Abstract: The Upper Jurassic Qigu Formation is the main exploration layer in the Fudong slope area in the east of Junggar Basin, which is thought to be the favorable replace objects of lithologic and stratigraphic reservoirs．Guided by highresolution sequence stratigraphic theory, one longterm base level circle，three midterm base level circles and eight shortterm base level circles are divided from Qigu Formation of Fudong slope area in east of Junggar basin through outcrops, drilling cores, seismic and logging dataMidterm base level circles have three basic types of sequence structure, and sandbodies positioned in initial stage of midterm base level circles are favorable for reservoir development, while shortterm base level circles have five basic types of sequence structure. Lithofacies palegeography is depicted in the framework, and the result shows that evolution of lithofacies palegeography is mainly affected by tectonic movement, and distribution range of delta front subfacies becomes larger, while delta plain becomes smaller, and the favorable sedimentary microfacies for reservoir development is distributary channel.

Key words: Fudong slope area, Qigu Formation, highresolution sequence stratigraphy, base level circle, lithofacies palegeography, reservoir prediction