THE INESCAPABLE FACT THAT HYDROCARBON RESERVES IN THE WORLD ARE DECREASING, HAS LED TO CONSIDERABLE RESEARCH AND INVESTMENT IN EXPLORATION FOR NEW CONVENTIONAL HYDROCARBON RESERVES, AND DEVELOPMENT OF UNCONVENTIONAL HYDROCARBON RESOURCES SUCH AS OIL SHALE OR TAR SAND. DEVELOPING A PRODUCTION TECHNIQUE THAT WILL RECOVER CLOSE TO ONE HUNDRED PERCENT OF THE OIL IN A PETROLEUM RESERVOIR HAS BEEN THE DREAM OF PETROLEUM ENGINEERS AND PRODUCTION MANAGERS FOR YEARS. IN SITU COMBUSTION INVOLVES INITIATION OF PROPAGATION OF FIREFRONT OR COMBUSTION ZONE IN THE RESERVOIR, BY AIR INJECTION. IN THIS ARTICLE INVESTIGATED EXPERIMENTAL AND NUMERICAL SIMULATION STUDIES OF THE WET COMBUSTION RECOVERY PROCESS.

CHEMICAL FLOODING IS RELIES ON THE ADDITION OF ONE OR MORE CHEMICAL COMPOUNDS TO AN INJECTED FLUID EITHER TO REDUCE INTERFACIAL TENSION BETWEEN THE RESERVOIR OIL AND INJECTED FLUID OR TO IMPROVE THE SWEEP EFFICIENCY OF THE MOBILITY RATIO. BOTH MECHANISMS ARE DESIGNED TO INCREASE THE CAPILLARY NUMBER. IN THIS ARTICLE INVESTIGATED THE EFFECT OF POLYMER CONCENTRATION IN INJECTION STREAM ON SOME PARAMETERS SUCH AS: POLYMER ADSORPTION CONCENTRATION, POLYMER IN SOLUTION, WATER-OIL CAPILLARY PRESSURE, OIL PRODUCTION TOTAL.

THIS ARTICLE DESCRIBES THE DIFFERENT METHODS OF CAPTURING CO2, AS ONE OF THE MOST IMPORTANT GREENHOUSE GASES, FROM FLUE GAS. IT MAY USE IN PETROCHEMICAL DOWNSTREAM INDUSTRIES, EOR OR ITS SEQUESTRATION IN UNDERGROUND LAYERS. THE QUANTITY OF CO2 BY-PRODUCT STREAMS IN MAHSHAHR AND ASSALUYE ZONES IS REVIEWED AND THE AMOUNT OF ECONOMICAL FACTORS SUCH AS INVESTMENT, OPERATING COSTS, REVENUE AND BENEFIT ARE CALCULATED.

MICROSCOPIC DISPLACEMENT EFFICIENCY IS LARGELY A FUNCTION OF INTERFACIAL FORCES ACTING BETWEEN THE OIL, ROCK, AND DISPLACING FLUID. IF THE INTERFACIAL TENSION BETWEEN THE TRAPPED OIL AND THE DISPLACING FLUID COULD BE LOWER, THE OIL DROPLETS COULD BE DEFORMED AND COULD SQUEEZE THROUGH THE PORE CONSTRICTIONS. A MISCIBLE PROCESS IS ONE IN WHICH THE INTERFACIAL TENSION IS ZERO, THAT IS, THE DISPLACING FLUID AND THE RESIDUAL OIL MIX TO FORM ONE PHASE. IF THE INTERFACIAL TENSION IS ZERO, THEN THE CAPILLARY NUMBER NC BECOMES INFINITE AND THE MICROSCOPIC DISPLACEMENT EFFICIENCY IS MAXIMIZED. IN THIS ARTICLE HAVE BEEN INVESTIGATED THE EFFECT OF SOME PARAMETERS SUCH AS RESERVOIR PRESSURE, MISCIBLE GAS DENSITY, OIL DENSITY, INITIAL WATER SATURATION AND GAS DENSITY ON MISCIBLE FLOODING.