Enhanced oil recovery techniques - petrofed.winwinho...

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Gas Based EOR ProcessLimitations and Facts•The minimum depth is set by the pressure needed to maintainthe generated miscibility.•A A steeply dipping formation is very desirable to permit somegravity stabilization of the displacement.•Viscous fingering results in poor vertical and horizontal sweepefficiency.•Solvent may be trapped and not recovered.•Injected hydrocarbon gas should be available in sufficientquantity.•Recycling of produced gas may reduce the total gas requirement.
Gas Based EOR ProcessCO2 Flooding (Miscible & Immiscible)This process is carried out by injecting large quantities CO2 (15%or more of the hydrocarbon pore volume) into the reservoir.Miscible displacement by carbon dioxide is similar to vaporizinggas drive. The only difference is a wider range of components; C2 Cto C30 are extracted. As a result, CO2 flood process is applicableleto a wider range of reservoirs at lower miscibility pressure thanthose for the vaporizing gas drive. CO2 is generally soluble incrude oils at reservoir pressures and temperatures. It swells thenet volume of oil and reduces its viscosity even before miscibilityityis achieved by vaporizing gas drive mechanism. As miscibility isapproached as a result of multiple contacts both the oil phaseand the CO2 phase can flow together because of lower interfacialtension. CO2 can be recycled by extracting it from the crude atthe surface.
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Enhanced oil recovery techniquesDin
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Primary RecoverySecondary RecoveryT
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Incremental IOR/EOR OilIncremental
Page 9 and 10:
Thermal EOR ProcessThe principle of
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Thermal (Steam flooding)
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Thermal EOR ProcessLimitations :•
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Steam Flooding (Huff and Puff)
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Thermal EOR ProcessIn-situ Combusti
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Air injectionSCHEMATIC OF SPONTANEO
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In-situ Combustion
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LimitationsThermal EOR ProcessThe p
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W/c, %Balol FieldBalol FieldIn-situ
Page 28 and 29: Non-Thermal EOR MethodsNON-THERMALM
Page 30 and 31: Chemical Floods Current Status Worl
Page 32 and 33: Chemical EOR Process
Page 34 and 35: WATER FLOODInjectorProducer
Page 36 and 37: WATER FLOODInjectorProducer
Page 38 and 39: SURFACTANT FLOODSurfactant follows
Page 40 and 41: SURFACTANT FLOODInjectorProducer
Page 42 and 43: SURFACTANT FLOODInjectorProducer
Page 44 and 45: SMART SURFACTANT FLOODSmart Surfact
Page 46: SMART SURFACTANTInjectorProducer
Page 49 and 50: SMART SURFACTANTInjectorProducer
Page 51 and 52: SMART SURFACTANTInjectorProducer
Page 53: Chemical EOR ProcessTechnical Scree
Page 56 and 57: Chemical EOR ProcessPolymer Process
Page 62 and 63: Chemical EOR ProcessLimitations and
Page 64 and 65: 140120100water cut (%)Polymer Flood
Page 66 and 67: Gas Based EOR Process
Page 68 and 69: Gas Contribution to Green House Eff
Page 70 and 71: Gas Based EOR ProcessHydrocarbon Mi
Page 72 and 73: Miscible Gas Flooding(Hydrocarbon I
Page 74 and 75: Gas Based EOR ProcessRich Gas Injec
Page 76 and 77: Miscible Gas Injection: Gandhar GS-
Page 80 and 81: Gas Based EOR ProcessCO2 Flooding (
Page 82: Gas Based EOR ProcessCO2 Flooding (
Page 86 and 87: Gas Based EOR ProcessCO2 Flooding (
Page 88 and 89: Gas Based EOR ProcessNitrogen Gas F
Page 90 and 91: Gas Based EOR ProcessWater And Gas
Page 92 and 93: Gas Based EOR ProcessClassification
Page 94 and 95: Gas Based EOR ProcessPerformance of
Page 96 and 97: Gas Based EOR ProcessSimultaneous w
Page 98 and 99: Gas Based EOR ProcessDisplacement E
Page 101 and 102: INCORRECT APPLICATIONS:Miscible Flo
Page 103 and 104: Microbial EOR ProcessMicrobial Enha
Page 105 and 106: THE TECHNIQUE INVOLVES:‣injection
Page 107 and 108: MICROBIAL PRODUCTS AND THEIR ACTION
Page 109 and 110: Micro Photo Graph of Consortium S-2
Page 111 and 112: Other parameters which areconsidere
Page 113 and 114: Schematic flow diagram of MEOR JobT
Page 115 and 116: 1009080706050403020100MEOR PERFORMA
Page 117 and 118: 1009080706050403020100MEOR PERFORMA
Page 119 and 120: 403530Liquid rate / Oil rate m3/d10
Page 121 and 122: COST OF MEOR OILMEOR job cost with
Page 123: Conclusions•The forces holding ba
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