An Innovative Integrated Reservoir Characterization Driven by Modified Saturation Height-RRT Model (SCAL based) for a Reliable Reservoir Modeling in Complex Sandstone Reservoirs

Abstrak

It has been known that the uncertainty of original oil in place (OOIP) is one of challenges in reservoir development where the reliable and minimize the uncertainty of this will be important for reservoir characterization and development. The field has
complex reservoir subunits, variation fluid contacts and sand discontinuity due to fault or stratigraphic. Therefore, it requires an integrated petrophysical evaluation approach of logs, special core analysis (SCAL), geology, geophysics, reservoir rock typing
(RRT), saturation height model (SHM) and detailed reservoir/fluid analysis to provide reliable reservoir characterization, fluid contacts estimation and minimize uncertainty.
The different of water saturation resistivity with core saturation height model and quick increased water saturation in production wells have been evaluated for an improving reservoir characterization. An innovative integrated petrophysical evaluation has 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 (MICP, Centrifuge, Porous plate and
Relative Permeability) data for every RRT for reservoir subunits, the free water level (FWL) derived from formation pressure has been used to identify an initial oil water contact, and thus it has provided good comparison of SW_Log & SHF for reservoir
modeling. An initial water saturation, relative permeability and residual oil saturation from SCAL data have been used in evaluation. The sigma-pulse neutron capture and PLT also have been used to verify fluid contacts and water saturation changes in
complex sandstone reservoirs during well production.
An advanced integrated evaluation approach of subsurface and well test data has been used to provide reliable and good of reservoir properties and results on porosity, permeability, fluid contacts, reservoir rock typing and initial water saturation initial oil in place. It has provided reliable reservoir characterization, reservoir modeling and a good reservoir characterization and development for multi-layer and complex sandstone reservoirs.
Therefore the innovative integrated reservoir evaluation approach has provided reliable assurance and important benefits for reservoir characterization, optimization and reservoir management.