+200 Petroleum Company Interview Questions part.2

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Petroleum Exams Collection

a very big collection of more than 200 questions asked in petroleum companies exams and interviews, enjoy!

1. What can you do if an instrument is suddenly shut down?
A. Check fuse.
B. Check the resistors,
C. Check the capacitors.

2. Write the Ohm’s Law.
3. To measure the resistance of a resistor fixed in the printed circuit board:
A. Disconnect both legs.
B. Disconnect one leg.
C. Measure direct.

4. To measure the voltage drop on the resistor, connect AVO meter:
A. In series with the resistor.
B. In parallel with the resistor.
C. Connect one leg with the resistor and the other with ground.

5. To be sure that the capacitor is OK using the Ohm meter, the reading should be:
A. Infinity.
B. Constant.
C. Changing.
D. Zero.


1. Voltage of normal dry cell battery used for baby toys, clock… etc is: (….).

2. In a diesel engine what actually ignites the fuel?

3. Speed of light is: (….) m/sec.

4. Rock types are: (..,….and..).

5. Atom can be defined as: (….)

6. Isotope can be defined as: (….)

7. Avogadro’s constant is: (….)

8. A pencil lead composed mainly of:(….)

9. Approximate temperature of absolute zero in degree centigrade is:(….).
(Absolute zero is the lowest possible temperature where nothing could be colder, and no heat energy remains in a substance. absolute zero is defined as precisely 0 K on the Kelvin scale and −273.15 on the Celsius (centigrade) scale and −459.67 degrees on the Fahrenheit scale.)

10. S.I unit of electrical resistivity is: (….)

11. S.I unit of current is: (….)

12. S.I unit of power is: (….)

13. The three colors used to make a color TV picture are:(….,…and….)

14. Chemical composition of ozone: (….)

15. The closest planet to the sun: (….)

16. The mass of the electron is equal to the mass of the neutron.(….)

17. Boiling point of water in degree centigrade = (….)

18. Boiling point of water in Fahrenheit = (….)

19. Freezing point of water in degree centigrade = (….)

20. Draw a diagram showing what would be seen on an oscilloscope screen if the following electrical supplies were connected to the oscilloscope input:

• The mains (or line) supply from the socket in the wall provided by the electricity (utility) company.

• A battery such as used in question 1.

21. Freezing point of water in Fahrenheit = (….)
Tc = (5/9)*(Tf-32);
Tf = (9/5)*(Tc+32);
Tc = temperature in degrees Celsius, Tf = temperature in degrees Fahrenheit

22. Seconds in 24 hours = (….)

23. Mass of 1000 cm3 of water = (….)

24. Mention 3 isotopes of Hydrogen:(….,….and….)

25. Calculate the area of this triangle:
base=3m and height=5m

26. Calculate the volume of this shape:
Cylinder of diameter= 2 m and height=5m

27. Complete only one of the following equations:>>dynamics
S =
V =
V2 =
V: velocity, u: initial velocity, a: acceleration, s: distance

28. Which is more greater in frequency: ultraviolet or visible light: (….)

29. The wavelength of visible light is: (….).

30. A problem: given voltage of 400 V, power of 800 Watt, the current is ………

31. The electric resistance in the problem above is: ……

33. The speed of sound = (….)

34. If I drop a mass of 1 Kg from rest vertically down, at what speed will it be travelling after 10 seconds? (ignore air resistance)
Vf = Vi + g t

• If I used a mass of 2 kg, will it fall faster?

35. The half life of a radioactive material is: (….)

36. Does the half life time decreases or increases with increasing temperature?

37. A box contains 250 cm3 of a fluid with a mass of 260 kg (ignore the mass of the box)
• Density = 1.04 g/ cm3
• Is the fluid oil or fresh water or salt water or gas?

38. In the given circuit, what will happen if you connect the switch?

39. Which fluid is lower in density: A or B?


1-Write the stratigraphic column of GOS, WD, Nile delta

formation – structure- index fossil- unconformity- sequence- mud log unit- time lag- mud circulation- attic oil-clysmic fault-muting- CDP- NMO- migration-  stacking- pull up- ghost multiple

3-what is difference between
1-fault, joint
2-erosion, diagensis

4-when SP can not measure

5-mention 5 fields in GOS and mention the horizon of production

6-what is the major type of traps in GOS

7-what are the favorable conditions to form oil

8-how can you calculate?
1-interval velocity
2-reflection coefficient

9-According to stratigraphic sequence what is the reservoir geometry in the down dip


1- Draw a map for Egypt, Highlighting the main provinces and cities.

2- Calculate in steps the scale of your map?

3- Draw the following in a simplified form:

– Gulf of Suez Stratigraphic Column.

– Western Desert Stratigraphic Column.

– Nile Delta Stratigraphic Column.

4- Give a brief note about:

– Lag Time

– Mud Circulation

– Mud Logging Unit

5- Correct the following statements:

– Urn Bogma formation is related to Cretaceous Age.
– Jurrasic sediments are well exposed in G. Maghara.
– The plant remains are called Trace Fossils.
– Zeit formation is related to the Pliocene Age.
– The Genus may contain many orders.
– Belayim formation is younger than Abu Roash formation.
– Kareem formation is well developed in Abu Gharadig field.
– Abu Madi formation is well developed in Gulf of Suez (GOS)
– Sudr formation is very thick body of fine Sandstone in Gulf of Suez (GOS).

6- Choose the correct answer:

1- Urn Baraka Field is in
a) Nile Delta.
b) Western Desert.
c) Gulf of Suez.
d) Sinai.

2- Known oil seeps exist in
a) AbuMadi.
b) Alamein.
c) Gemsa.
d) Abu Rudeis.

3- What is the daily oil production of Egypt?
a) About 100,000 bbls/day
b) About 250,000 bbls/day
c) About 550,000 bbls/day
d) About 1000,000 bbls/day

4- What is the current approximate price of one barrel oil?

a) US $70.
b) US $90.
c) About US $110.
d) US $50.

5- Shoaab Ali oil Field present: in

a) Western Desert.
b) Nile Delta.
c) Gulf of Suez.

6- Most of the gold mines in Egypt exist in

a) Western Desert.
b) Eastern Desert.
c) Sinai.

7-Which Oasis has iron ore?

a) El Kharga Oasis.
b) El Bahariya Oasis.
c) Siwa Oasis. d) Farafra Oasis.

8- Where is the known phosphate mining in Egypt?

a) Edfo.
b) Ras El Dip.
c) Abu Tartoor.
d) Badracheen.

9- Where is the oil shale Present in Egypt?

a) Ras Shukeir.
b) Gebel El Zeit.
c) Abu Tartoor Plateau. d) Alexandria.

10- Nearly the whole land surface of earth was covered by huge sheet of ice during

a) Cambrian.
b) Precambrian.
c) Cretaceous.
d) Pleistocene.
e) Jurassic.

11- The Dead Sea is located in

a) Rift valley.
b) Canyon.
c) Between chains of mountains.
d) Intermountain plain.

12- The age of economic coal bearing rocks in Egypt is

a) Cretaceous.
b) Carboniferous.
c) Triassic.
d) Jurassic.

13- First vertebrates (Fishes) appeared in

a) Paleocene.
b) Devonian.
c) Ordovician.
d) Cambrian.

14- Outcrop of strata shown in geological map as parallel contours indicates

a) Horizontal Strata.
b) Vertical Strata.
c) Inclined Strata.
d) Strata inclined 45°.

15- On a map, which of the following scales is considered the largest

a) 1:100,000.
b) 1:50,000.
c) 1:10,000.
d) 1:200,000.

16- The Tethys sea evaporated completely during

a) Eocene.
b) Middle Miocene.
c) Pliocene.
d) Oligocene.

17- In which period the Red Sea was opened?

a) Eocene.
b) Tertiary.
c) Mesozoic.
d) Proterozoic.

18- Time rock units are defined as

a) Lithologic characteristics.
b) Lithologic characteristics and time boundaries.
c) Lithologic characteristics and fossil content.
d) Lithologic characteristics and index fossils.

19- Syrian arc structures in Egypt date back to

a) Paleozoic time.
b) Miocene time.
c) Cretaceous.
d) Jurassic time.

20- Strike slip movement shows

a) Right Lateral.
b) Left Lateral.
c) Clock wise.
d) Anti clock wise.

21- Cross beds are produced when

a) The Flow direction of current changes gradually.
b) The Flow direction of current changes suddenly.
c) Velocity of current decrease suddenly.
d) Ripples migrate from one place to another.

22- Arrange the following environmental zones sea-ward

a) Bathyal.
b) Neritic.
c) Abyssal.
d) Littoral.

23- What type of log do we use for porosity calculation?

a) Density / Neutron.
b) Resistivity.
c) Gamma Ray.

24- What type of log do we use for Lithology identification?

a) Microspherical.
b) Density.
c) Caliper.

25- How can we differentiate between heavy and light oil response on resistivity curves?

a) Deep & Shallow readings are the same.
b) Separation between Deep & Shallow readings in good permeable reservoirs.
c) We can’t differentiate.

26- Caliper log helps to determine

a) Oil zones.
b) Hole size.
c) Hole inclination.

27- Dipmeter tool measures

a) Oil bearing reservoirs.
b) Bed dips.
c) TWT.

28- We measure shaliness (VSH) from

a) VSP.
b) Sonic.
c) GR.

29- Resistivity is inversely proportional to

a) Tightness.
b) Oil presence.
c) Formation water salinity.

30- Petrophysical Computation is performed on

a) Any data.
b) Raw data.
c) Data after Environmental Correction

8- How do we measure the Mud cake thickness?

9- Write Archie’s Equation for saturation?

10- How many geophysical methods are there? (Name them)


Different Questions and Their Answers

a) Porosity:

It is the percentage of pore volume or void space to the total volume of rock.
• Primary porosity: The porosity preserved from deposition through lithification.
• Secondary porosity: created through alteration of rock, commonly by processes such as dolomitization, dissolution and fracturing.

• Total porosity: is the total void space and as such includes isolated pores and the connected
• Effective porosity: The interconnected pore volume or void space in a rock that contributes to fluid flow or permeability in a reservoir.

b) Permeability:

It is the ability of the rock to transmit fluids, to be permeable; a formation must have interconnected porosity (Unit is Darcie)
• Absolute permeability: ability to flow or transmit fluids through a rock, conducted when a single fluid, or phase, is present in the rock.
• Effective permeability: The ability to preferentially flow or transmit a particular fluid when other immiscible fluids are present in the reservoir. If a single fluid is present in a rock, its relative permeability is 1.0
• Relative permeability: is the ratio of effective permeability of a particular fluid at a particular saturation to absolute permeability of that fluid at total saturation.

c) Sedimentary rock:

Is a type of rock that is formed by sedimentation of material at the Earth’s surface and within bodies of water. the most important for the oil industry as it contains most of the source rocks and cap rocks and virtually all reservoirs. Sedimentary rocks come from the debris of older rocks ; and are split into two categories:

• Clastic rocks: Formed from the materials of older rocks by the actions of erosion, transportation and deposition. (Mechanical process). Such as conglomerate, sandstone, shale.
• Non clastic rocks: are formed by chemical precipitation (settling out from a solution). Such as Limestone, calcite and halite.

d) Formation:

– It is basic unit for the naming of rocks in stratigraphy: a set of rocks that are or once were horizontally continuous, that share some distinctive feature of lithology, and are large enough to be mapped.
– Is the fundamental unit of lithostratigraphy. A formation consists of a certain number of rock strata that have a comparable lithology, facies or other similar properties. A formation can be divided into member and are themselves grouped together in groups.

e) Sequence:

A group of relatively conformable strata that represents a cycle of deposition and is bounded by unconformities or correlative conformities. Sequences are the fundamental unit of interpretation in sequence stratigraphy. Sequences comprise systems tracts.

f) Index fossil:

Are fossils used to define and identify geologic periods (or faunal stages). They work on the premise that, although different sediments may look different depending on the conditions under which they were laid down, If the species concerned were short-lived (in geological terms, lasting a few hundred thousand years), then it is certain that the sediments in question were deposited within that narrow time period. The shorter the lifespan of a species, the more precisely different sediments can be correlated, and so rapidly evolving types of fossils are
particularly valuable. The best index fossils are common, easy-to-identify at species level, and have a broad distribution—otherwise the likelihood of finding and recognizing one in the two sediments is minor.

g) Unconformity:

Is a buried erosion surface separating two rock masses or strata of different ages. There are many type from unconformity surface:
• Angular unconformity: is an unconformity where horizontally parallel strata of sedimentary rock are deposited on tilted and eroded layers, producing an angular discordance with the overlying horizontal layers.

• Disconformity: unconformity between

parallel layers of sedimentary rocks which represents a period of erosion or non-deposition. paraconformity is a type of disconformity in which the separation is a simple bedding plane with no obvious buried erosional surface.

• Paraconformity:  is a type of unconformity in which strata are parallel; there is little apparent erosion and the unconformity surface resembles a simple bedding plane.
• Nonconformity: exists between sedimentary rocks and metamorphic or igneous rocks when the sedimentary rock lies above and was deposited on the pre- existing and eroded metamorphic or igneous rock.

h) Structure:

A geological feature produced by deformation of the Earth’s crust, such as a fold or a fault; a feature within a rock, such as a fracture or bedding surface; or, more generally, the spatial arrangement of rocks.

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