Reservoir Engineering Concepts Quiz

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Questions and Answers

Which factor influences the gross rock volume of a reservoir?

Viscosity

Depositional environment (correct)

Fluid compositions

Formation volume factors

Which characteristic of the fluids in a reservoir is important to consider?

Hydrocarbon saturation

Gas:Oil ratio (correct)

Porosity

Net:Gross ratio

Which parameter is crucial to determine the hydrocarbon in place?

Reservoir quality

Depositional environment (correct)

Facies distributions

Capillary pressure

Which factor controls the gross rock volume of a reservoir?

Depositional environment (A) Signup and view all the answers

What does the Young Laplace Equation relate to in reservoir engineering?

Capillary pressure and interfacial tension (C) Signup and view all the answers

Which equation describes the relationship between capillary pressure and water saturation in a reservoir?

$P_c = \frac{{2\gamma}}{{r}}$ (C) Signup and view all the answers

What is the main objective of reservoir appraisal?

Determining the hydrocarbon in place (B) Signup and view all the answers

Which factor primarily controls the gross rock volume of a reservoir?

Depositional environment and facies distributions (A) Signup and view all the answers

What does Darcy's Law relate?

Volumetric flow rate to pressure difference, permeability, viscosity, length, and cross-sectional area (A) Signup and view all the answers

What is the main factor controlling porosity in a rock?

Grain size (D) Signup and view all the answers

What does the Young Laplace Equation relate capillary pressure to?

Principal radii of curvature, capillary pressure, and interfacial tension (B) Signup and view all the answers

What does the productivity index (PI) determine?

The flow rate of oil in a well during well testing (A) Signup and view all the answers

Which of the following tests involves analyzing pressure drawdown and build-up?

Drill Stem Test (DST) (D) Signup and view all the answers

What does Darcy's Law represent?

$q = \frac{K \Delta P}{\mu L A}$ (C) Signup and view all the answers

What is the main objective of reservoir appraisal?

To evaluate reservoir performance and characteristics (B) Signup and view all the answers

What does 'Horner time' describe in semilog plots of DST and production data?

The time that decreases as real time increases (B) Signup and view all the answers

What is the equation for capillary pressure in a reservoir?

$P_c = \frac{\gamma}{r^2}$ (C) Signup and view all the answers

What primarily controls the gross rock volume in a reservoir?

Shape of the structure and depths of fluid contacts (D) Signup and view all the answers

What is the equation for calculating pore pressure in a reservoir?

$P_{Hydrostatic} = \rho_{water}gh$ (B) Signup and view all the answers

What does Darcy's Law describe?

The flow of fluid through a porous medium (A) Signup and view all the answers

Study Notes

Reservoir Engineering Concepts

Capillary pressure in a reservoir is given by the equation $P_c = \frac{{\gamma}},{{r^2}}$, where $\gamma$ is the interfacial tension and $r$ is the radius of curvature of the meniscus.
The Young Laplace Equation relates capillary pressure difference between fluids to interfacial tension and principal radii of curvature of the interface.
Reservoir rock wettability can be water-wet, oil-wet, or mixed-wet, with mixed-wet being a combination of both.
The likely performance of a reservoir during production depends on factors such as reservoir quality, porosity, and hydrocarbon saturation, with high hydrocarbon production rates being more favorable.
Gross rock volume in a reservoir is primarily controlled by the shape of the structure, depths of fluid contacts, and facies distributions, rather than the depositional environment.
Permeability of a reservoir is primarily controlled by the grain size of the reservoir rock, with smaller grain sizes generally resulting in lower permeability.
Darcy's Law, which describes the flow of fluid through a porous medium, is given by the equation $q = \frac{k \Delta P A},{\mu L}$, involving permeability, pressure difference, cross-sectional area, viscosity, and length of the porous medium.
The main objective of reservoir appraisal is to estimate the hydrocarbon reserves in the reservoir by assessing the volume of recoverable hydrocarbons and their distribution within the reservoir.
A Drill Stem Test (DST) in oil exploration is conducted to evaluate the productivity of the reservoir by measuring the flow rate and pressure of the reservoir fluids.
The net-to-gross ratio in a reservoir is primarily controlled by the depositional environment, which determines the distribution of facies and diagenetic processes affecting the rock.
The equation for calculating pore pressure in a reservoir is $P_{Hydrostatic} = \rho_{water}gh$, where $\rho_{water}$ is the density of water, $g$ is the acceleration due to gravity, and $h$ is the depth.
The equation for capillary pressure in a reservoir is $PC = (\rho_o - \rho_w)gh$, where $\rho_o$ is the density of oil, $\rho_w$ is the density of water, $g$ is the acceleration due to gravity, and $h$ is the height above the free water level.

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Description

Test your knowledge of reservoir engineering concepts with this quiz covering topics such as capillary pressure, reservoir wettability, Darcy's Law, reservoir performance factors, and more. Dive into key equations and principles essential for understanding and evaluating reservoir behavior and productivity.