Key words: lower Miocene reservoirs, litho-facial inhomogeneity, sedimentation model, reservoir properties, Flow Zone Indicator (FZI).
This paper presents the results of the sedimentology and lithology heterogeneity investigation in the complicated Lower Miocene clastic reservoirs and its relationship with the fundamental rock petrophysical properties (porosity, permeability) in the Central Dragon field (Cuu Long basin, Vietnam Offshore). Based on the seismic survey data, core lithological and petrophysical analysis data and the wireline logs the comprehensive complex analysis of the section facial characteristics had been done. The reservoir lithological heterogeneity analysis and the lithological (facies) contribution to the petrophysical properties (porosity, permeability) distribution had been evaluated with the special (advanced) petrophysical attribute – FZI (Flow Zone Indicator). Following the investigation, the highlighted depositional environments with improved reservoir properties had been determined. The research data can be used to refine the actual geological model and for the further geological prospecting objectives.
