Sidimentary Facies Classification of Turbidite of Upper Part of the Shasi Member in Bonan Sag, Shengli Oilfield

This paper presents briefly the geological features, describes the turbidite and its sequences and styles and studies the sedimentary facies and microfacies of the upper part of the Shasi member in six wells in Bonan sag. It is demonstrated from lithology of deep water, rock structure of density flow origin, grain distribution of turbidite origin, seismic and well logging responses and proper forming conditions that under the background of the deep lacustrine and semideep lacustrine facies deposits develops sublacustrine fan and far glutinite lens.