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Minggu 3 - Common Condition of EOR

The key factors affecting enhanced oil recovery (EOR) processes are: 1) Reservoir properties such as depth, dip, heterogeneity, petrophysical properties, and driving mechanism. 2) Fluid properties including remaining oil saturation, oil viscosity, and injection fluid. 3) Amount of original oil reserves and viscosity of the oil, which determine the difficulty of displacement and potential recovery.

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Nofril Zendriadi
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50 views6 pages

Minggu 3 - Common Condition of EOR

The key factors affecting enhanced oil recovery (EOR) processes are: 1) Reservoir properties such as depth, dip, heterogeneity, petrophysical properties, and driving mechanism. 2) Fluid properties including remaining oil saturation, oil viscosity, and injection fluid. 3) Amount of original oil reserves and viscosity of the oil, which determine the difficulty of displacement and potential recovery.

Uploaded by

Nofril Zendriadi
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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COMMON CONDITIONS FOR

ALL EOR PROCESSES


Prof.Dr.Ir. Hasian P. Septoratno Siregar DEA
Dr. Rani Kurnia, S.Si.,M.T
Factors Affecting EOR
Depth
Dip
Reservoir Heterogeneity
Petrophysics
Driving Mechanism
Remaining Oil Reserves
Fluids Residual Oil Saturation
Oil Viscosity
Depth and Dip
Dip
Injection
Pressure • If density difference between displacing &
displaced fluid is big, dip has a meaningful
effect

• In high frontal displacement velocity, dip effect


becomes less significant
Depth • Water tends to flow faster at the bottom
(gravity tongue)
Compressor
Power Cost • Gas tends to flow faster at the top (gravity
override)
Heterogeneity and Petrophysical
Properties

Heterogeneity Petrophysical Properties

• Pore Size • Porosity, 


• Rock Type • Permeability, k
• Skin effect • Relative Permeability, Krw, Kro
• Structure Continuity • Capillary Pressure
• Stratigraphy • Rock Wettability
Driving Mechanism
waterflooding may not be
effective in strong-water drive
It is a very important factor
reservoir, if injection location
is near aquifer
determines the degree of
Driving Sor from the previous process difficulty to displace the
Mechanism remaining oil

More difficult/expensive
Lower Sor gives less
benefit to EOR project Less capital to pay
Oil Reserves and Oil Viscosity

Oil Viscosity
• An important factor when selecting
Oil Reserves
EOR method

• Important factor in mobility ratio


• High Oil Remaining
controlling the sweep efficiency
Reserves is a good EOR
• Critical success factor in immiscible
project candidate
displacement → lower oil viscosity
gives better recovery efficiency

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