Reservoir Petrophysics with Hydrocarbon Phase Analysis | Midterm Exam

a measure of the storage capacity

ratio of the total pore space

percentage of interconnected pore space

- fraction or percent of the pore volume

- forces retaining the water

- the saturation of the oil must exceed a certain value

- remaining oil left

- fraction of pore volume occupied by movable oil

- gas phase remains immobile until its saturation exceeds a certain saturation

• maximum water saturation

- tendency of one fluid

- forces acting on the interface

- when the interface is between two liquids

- when two immiscible fluids are in contact

- pore spaces of reservoir rocks were originally filled with water

process of generating the capillary pressure

- reversing the drainage process by displacing the nonwetting phase

- process of saturating and desaturating a core

– vertical thickness

- free water level

- dimensionless function of saturation

- property of the porous medium

- equation that defines permeability in terms of measurable quantities

– he developed a fluid flow equation

1 Darcy =

- usually used in permeability determination because of its convenience, availability, and to minimize fluid-rock reaction

- discovered that permeability measurements made with air

- defined as upstream flowing

- studied the gas slip phenomena

- averaging method is used to determine the average permeability of layered-parallel beds

- illustrated experimentally that the most probable behavior of a heterogeneous formation

- suggested that in an ideal pore configuration

- as the saturation of a particular phase decreases, the permeability to that phase also decreases

- pressure difference between overburden and internal pore pressure

- defined as the fractional change in volume of the solid rock

- defined as the fractional change in volume of the bulk volume

- defined as the fractional change in pore volume of the rock

- total compressibility

- stated that in a reservoir only the vertical component

- same order of magnitude

- used 79 samples

- variation in reservoir Properties

- a number that characterizes the departure

- introduced the concept of the permeability variation coefficient

- the ratio of effective permeability

- developed a probability model to estimate three-phase relative permeability

- a nonzero residual oil saturation

RESERVOIR FLUID PROPERTIES

- the ratio of the gas density

RESERVOIR FLUID PROPERTIES

- volume occupied by a unit mass

RESERVOIR FLUID PROPERTIES

- ideal gas mixture

RESERVOIR FLUID PROPERTIES

• homogeneous fluid

RESERVOIR FLUID PROPERTIES

• measure of the internal fluid friction

the result of sedimentary processes

- reservoirs that contain almost entirely natural gas

- if the fluid at the surface still remains gas

- if the surface pressures cause some liquid hydrocarbons to evolve

- almost all oil reservoirs except those classified as extra heavy or tars will produce some natural gas at the surface

• geological setting and rock type

- formed in sandstones

- methane gas that is found adsorbed in many buried coalbed deposits

- found in organic shale rocks

- function of pressure, temperature, and volume

- the curve that separates the pure liquid phase from the two-phase

- the point on the phase envelope where the bubble point curve meets the dew point curve

- the highest temperature at which liquid and vapor can coexist

- the highest pressure at which a liquid and vapor can coexist

- unique phenomenon that appears only among hydrocarbon mixtures.

- the ratio of the molecular weight

- a measure of a fluid’s internal resistance to flow.