High-Resolution Sequence Stratigraphy in the Lower Member of Es2 in Shanghe Oilfield

By using high resolution sequence stratigraphy theory and technique, chronostratigraphic sequence framework is established and finely compared, 3 medium term base level cycles and 46 short term base level cycles are outlined of the lower member of the Es2 in Shanghe Oilfield. According to coring data, logging, drilling and other experimental analysis data, the main depositional environments in the study area is delta front. Based on the sequence division and correlation strata, longitudinal characteristics, the distribution and evolution of sedimentary microfacies in different periods have been revealed.