The lake delta depositional system and Petroleum accumulation in the second Member of shahejie formation in Dongying depression, East China

摘要

The sedimentary microfacies of lake delta are divided and described in detail in the 2nd Member of Shahejie Formation of Tong 61 block in Dongying depression especially be using seismic and logging data. Microfacies maps were drawn up systematically, and a model of lake delta is given. The controlling of Sedimentary facies to petroleum accumulation are discussed. Subaqueous distrigutive channels, mouth bars, Distal mouth bars and shallow lake bar sand-bokies are considered to be favorable reservoirs.