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Chemical EOR ProcessLimitations and Facts•There are two types polymer synthetically produced polymers(Acrylamidetype) and bio-polymers (Xanthum(gum).•Factors which degrade polymers are salinity, temperature, time,shear rate and presence of divalent ions.•Bio-polymers suffer from bacterial degradation and cause well boreplugging.•Polymers may be ineffective in a mature water flood because of low lmobile <strong>oil</strong> saturation.•High adsorption on reservoir rock may kill the process.•Optimum temperature is a key selection criterion for polymers. Clay Cincrease polymer adsorption.•If <strong>oil</strong> viscosities are high, a higher polymer concentration is needed nto achieve the desired mobility control.•Some heterogeneity is acceptable but for conventional polymerflooding, reservoirs with extensive fractures should be avoided.
Polymer Flood: SanandInjectors :Polymer - 13, Chase Water - 7Injection Rate : 910m3/d (800ppm) , 490m3/d (Water)Envisaged addl. Recovery: ~ 14 %Drive- Active Edge WaterRF - 31.5 %Viscocity - 20 cp
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Enhanced oil recovery techniquesDin
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Primary RecoverySecondary RecoveryT
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Incremental IOR/EOR OilIncremental
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Thermal EOR ProcessThe principle of
Page 11 and 12: Thermal (Steam flooding)
Page 13 and 14: Thermal EOR ProcessLimitations :•
Page 15 and 16: Steam Flooding (Huff and Puff)
Page 17 and 18: Thermal EOR ProcessIn-situ Combusti
Page 20 and 21: Air injectionSCHEMATIC OF SPONTANEO
Page 22 and 23: In-situ Combustion
Page 24 and 25: LimitationsThermal EOR ProcessThe p
Page 26 and 27: 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 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 78 and 79: Gas Based EOR ProcessLimitations an
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
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Schematic flow diagram of MEOR JobT
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1009080706050403020100MEOR PERFORMA
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1009080706050403020100MEOR PERFORMA
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403530Liquid rate / Oil rate m3/d10
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COST OF MEOR OILMEOR job cost with
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Conclusions•The forces holding ba
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