RESERVOIR DAY Flashcards
A discrete void within a rock, which can contain air, water, hydrocarbons or other fluids called
Pore
The percentage of pore volume or void space, or that volume within rock that can contain fluids called
Porosity
The interconnected pore volume in a rock that contributes to fluid flow in a reservoir called
Effective Porosity
The interconnected pore volume in a rock includes isolated pores that contributes to fluid flow in a reservoir called
Total porosity
That part of the pore space that has a characteristic dimension less than 1 micron called
Microporosity
The relative amount of water, oil and gas in the pores of a rock, usually as a percentage of volume called
Saturation
The fraction of gas in a given pore space called
Gas Saturation (Sg)
The fraction of oil in a given pore space called
Oil Saturation (So)
The fraction of water in a given pore space called
Water Saturation (Sw)
Oil that does not move when fluids are flowed through the rock in normal conditions called
Residual Oil
The volume of hydrocarbons per unit volume of rock that can be moved on production called
Movable Hydrocarbon
The ability, or measurement of a rock’s ability, to transmit fluids, typically measured in darcies or millidarcies called
Permeability
The measurement of the permeability, or ability to flow or transmit fluids through a rock, conducted when a single fluid, or phase, is present in the rock, called
Absolute Permeability
The ability to preferentially flow or transmit a particular fluid when other immiscible fluids are present in the reservoir (e.g., effective permeability of gas in a gas-water reservoir), called…
Effective Permeability
The ratio of effective permeability of a particular fluid at a particular saturation to absolute permeability of that fluid at total saturation called
Relative Permeability
A phenomenologically derived constitutive equation that describes the flow of a fluid through a porous medium called
Darcy’s Law
The process of absorbing a wetting phase into a porous rock called
Imbibition
The difference in pressure across the interface between two immiscible fluid phase called
Capilarry Pressure
The ratio of water produced compared to the volume of total liquids produced called
Water cut
The change in the oil-water contact profile as a result of drawdown pressures during production called
Water coning
The process of forcing a nonwetting phase into a porous rock called
Drainage
A method to predict future oil well or gas well production based on past production history called
Decline Curve Analysis
