Free Printable Reservoir Fluid Laboratory

1.

In laboratory work the isothermal compressibility of oil is determined at pressures relative to the bubble point pressure $P_b$ . At what pressure range is it found according to the procedure?

a)

Above $P_b$ only

b)

Below $P_b$ only

c)

Exactly at $P_b$ only

d)

Across all pressures regardless of $P_b$

2.

At the start of the procedure, which action is required for the crude oil sample? Use crude oil sample and place it in the P.V.T. cell as showed in the sample transportation experiment.

a)

Place the crude oil sample in a P.V.T. cell

b)

Pour the crude oil into an open beaker

c)

Load the crude oil into a core holder

d)

Inject the crude oil directly into a viscometer

3.

During the experiment, the pressure is declined and the volume is recorded at each pressure from the pump ruler until reaching a specified stop point. What is the stop point?

a)

The bubble point

b)

Atmospheric pressure

c)

The maximum pump pressure

d)

When volume becomes constant

4.

After recording data, what relationship must be plotted according to the procedure?

a)

Volume as a function of pressure

b)

Pressure as a function of time

c)

Volume as a function of temperature

d)

Compressibility as a function of pressure

5.

From the plot between pressure and volume, which slope is to be determined?

a)

$\Delta V/\Delta P$

b)

$\Delta P/\Delta V$

c)

$dT/dP$

d)

$\Delta V/\Delta T$

6.

Using equation (1) at any pressure and volume, what coefficient is calculated in the final step of the procedure?

a)

Oil compressibility coefficient $C_o$

b)

Gas formation volume factor

c)

Water salinity

d)

Oil density at standard conditions

7.

According to the theory section, the oil formation volume factor is defined mathematically as the ratio of reservoir-condition oil volume to stock-tank oil volume, expressed as $B_o = \dfrac{V_{Res}}{V_{St}}$ . Which equation below matches this definition?

a)

$B_o = \dfrac{V_{Res}}{V_{St}}$

b)

$B_o = \dfrac{V_{St}}{V_{Res}}$

c)

$B_o = \dfrac{V_{Res}}{V_{pb}}$

d)

$B_o = V_{Res} - V_{St}$

8.

While the oil relative volume is defined as the volume at each reservoir pressure to the volume at bubble point pressure, written as $V_R = \dfrac{V_{Res}}{V_{pb}}$ . Which equation below represents the relative volume of oil?

a)

$V_R = \dfrac{V_{Res}}{V_{pb}}$

b)

$V_R = \dfrac{V_{pb}}{V_{Res}}$

c)

$V_R = \dfrac{V_{St}}{V_{Res}}$

d)

$V_R = V_{Res} - V_{pb}$

9.

The mathematical relation between oil formation volume factor and relative volume is given as $B_o = V_R \times \dfrac{V_{pb}}{V_{St}}$ . Which of the following expressions matches this relation?

a)

$B_o = V_R \times \dfrac{V_{pb}}{V_{St}}$

b)

$B_o = V_R \times \dfrac{V_{St}}{V_{pb}}$

c)

$B_o = \dfrac{V_R}{V_{pb}} \times V_{St}$

d)

$B_o = \dfrac{V_{pb}}{V_{St}}$

10.

In the list of symbol descriptions, what does $V_{St}$ represent?

a)

Oil volume in stock tank condition (STB)

b)

Oil volume in reservoir condition (bbl)

c)

Oil volume in bubble point condition (bbl)

d)

Relative volume of oil (bbl/STB)

11.

In the list of symbol descriptions, what does $V_{pb}$ represent?

a)

Oil volume in bubble point condition (bbl)

b)

Oil volume in stock tank condition (STB)

c)

Oil volume in reservoir condition (bbl)

d)

Formation volume factor of oil (bbl/STB)

12.

The volume of a fluid phase can have a sensitive dependence on changes in which variables, according to the theory section?

a)

Pressure

b)

Temperature

c)

Salinity

d)

Porosity

13.

According to the text, formation volume factor of oil is measured in which type of labs?

a)

PTV labs

b)

PVT labs

c)

SCAL labs

d)

Core analysis labs

14.

In the given empirical correlation for $B_o$ , $B_o = 0.9759 + 0.00012\,[\,R_s\,\sqrt{\dfrac{\gamma_g}{\gamma_o}} + 1.25\,t\,]^{1.2}$ , to what power is the bracketed term raised?

a)

1.2

b)

1.0

c)

2.0

d)

0.5

15.

During the procedure, how is the pressure of fluid in the cell decreased?

a)

By rotating the hand wheel in reverse direction of clockwise

b)

By rotating the hand wheel clockwise

c)

By increasing mercury pump rate

d)

By venting the cell suddenly to atmosphere

16.

According to the procedure, the experiment continues until reaching which condition?

a)

Atmospheric pressure

b)

Bubble point pressure only

c)

Initial reservoir pressure

d)

Vacuum conditions

17.

When making the table in the procedure, which set of variables is included?

a)

$P$ (psi), $V$ (cc), $B_o$ (cc/cc), $V_R$ (cc/cc)

b)

Temperature (°C), $V$ (cc), $B_g$ (ft³/scf), $R_s$ (scf/STB)

c)

Depth (m), Porosity, Permeability, Saturation

d)

$P$ (psi), $V$ (cc), $R_s$ (scf/STB), API gravity

18.

For the plot described in the procedure, which axis should show $B_o$ when plotting $B_o$ against pressure?

a)

$B_o$ on Y-axis and pressure on X-axis

b)

$B_o$ on X-axis and pressure on Y-axis

c)

Both on Y-axis

d)

Both on X-axis

19.

For the second plot described in the procedure, which axis should show pressure when plotting $V_R$ against pressure?

a)

Pressure on X-axis and $V_R$ on Y-axis

b)

Pressure on Y-axis and $V_R$ on X-axis

c)

Both on X-axis

d)

Both on Y-axis

Reservoir Fluid Laboratory — Third stage: Procedure

Total questions: 19

Worksheet time: 10mins

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