Investigation of Block to Block Interaction in one of Iranian Oil Reservoirs

This study reviews and investigates the effects of some key fractured porous media parameters on oil recovery of South Pars oil layer during primary production and gas flooding. Also the effect of some important phenomena which may happen in this oil ring and available commercial fractured reservoir simulators unable to perform them accurately is studied. For choosing the best oil production and EOR scenarios, the necessity of investigations like this study is obvious. In addition this work can be extended to other Iranian fractured reservoirs. A series of sensitivity analysis during primary production and immiscible gas injection have been performed by CMG/IMAX simulator [1] based on a very simple single porosity model but very close to dual porosity/permeability modules of this simulator. Briefly, the objectives of the following article are: 1. Investigation of main matrix-fracture fluid exchange mechanisms (like gravity drainage and capillary imbibition) during primary production and gas injection into South Pars oil ring. 2. Emphasizing the importance of issues such as capillary continuity between matrix blocks, reinfiltration of fluid from higher to lower blocks and block shape on flow processes and oil recovery during primary production and immiscible gas injection in South Pars oil layer.By characterizing the fractured/non-fractured reservoirs and finding the main oil recovery mechanisms, reservoir management can be done scientifically at the best time and at the best location.

Keywords:

Block , Capillary Continuity , Capillary Pressure , Fracture , Gravity Drainage