An Innovative and Integrated Reservoir Characterization Driven by Modified Saturation Height Model and Variable Fluid Contacts for Challenging Complex Sandstone Reservoir

摘要

It has been known that the uncertainty of original oil in place (OOIP) is one of main challenges in proper reservoir development. The field has complex reservoir subunits, variable fluid contacts and structural and stratigraphic sand discontinuities. Therefore, reliable reservoir characterization and estimation of fluids in place requires an integrated approach of all available data of petrophysical evaluation, special core analysis (SCAL), geology, geophysics, reservoir rock typing (RRT), saturation height model (SHM) and fluid analysis. An innovative and integrated petrophysical evaluation have been studied and used in reservoir characterization. An advanced permeability log has been developed from porosity, clay bound, pore size, core and mobility data. It has used the modification of SHM that based on SCAL data including MICP, Centrifuge, Porous Plate and Relative Permeability data for every RRT and variable fluid contacts for subunits. An initial water saturation, and residual oil saturation from SCAL data have been used in evaluation. The pulse neutron capture and PLT have been used to verify fluid contacts and water saturation changes in complex sandstone reservoirs during production.