Borehole Geophysics & Petrophysics

25 Questions | By Kapil_IITR | Updated: Mar 22, 2022 | Attempts: 2768

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Borehole Geophysics & Petrophysics - Quiz

This Quiz is dedicated to Well Logging & petrophysics concepts. . . Carry On Guys. . . . Have Fun. . Best Wishes ,, Kapil Tyagi

Questions and Answers

1.

Number of Sedimentary Basins of India are :
- A.
  
  24
- B.
  
  25
- C.
  
  26
- D.
  
  27
2.

What is Exploration ???
- A.
  
  Discovering new commercial units of Hydrocarbon
- B.
  
  Discovering Hydrocarbon
- C.
  
  Discovering possible Reservoir Facies
- D.
  
  None of the above
3.

For accurate identification of a basin you need :
- A.
  
  Age
- B.
  
  Location
- C.
  
  Sediment Type
- D.
  
  Age & Location
4.

Presence of source rock ensures Hydrocarbon in a Basin.
- A.
  
  True
- B.
  
  False
5.

High Resistivity is always indicator of Hydrocarbons .
- A.
  
  True
- B.
  
  False
6.

Source rocks of petroleum are :
- A.
  
  Highly Porous and Permeable Rocks
- B.
  
  Fine Grained Sediments
- C.
  
  Granitic rocks
- D.
  
  None of these
7.

Gamma Ray detected in density log is :
- A.
  
  Natural Gamma present in the formation
- B.
  
  Gamma Ray from Epithermal Neutron source
- C.
  
  Gamma Ray scattered from the formation
- D.
  
  Gamma ray produced due to neutron absorption
8.

If the saturation exponent in Archie's Equation is 2 (n=2) , Then By what factor the bulk resistivity of 50 % water saturated formation increases in comparision to fully water saturated formation ???
- A.
  
  4
- B.
  
  8
- C.
  
  16
- D.
  
  32
9.

A combination of Radioactive Logging to detect chlorine in a formation is ::
- A.
  
  Neutron-Thermal Neutron Log & Gamma Gamma Log
- B.
  
  Neutron-Epithermal Neutron Log and Neutron-Gamma Log
- C.
  
  Neutron Gamma Log and Gamma Gamma Log
- D.
  
  Neutron-Epithermal Neutron Log and Gamma Gamma Log
10.

Spine and Ribs plots are used for :
- A.
  
  Mineral Identification
- B.
  
  Porosity Determination
- C.
  
  Mud Compensation
- D.
  
  None of above
11.

Which logging tool has largest depth of investigation ??
- A.
  
  Induction tools
- B.
  
  Porosity tools
- C.
  
  MSFL Tools
- D.
  
  Laterolog
12.

Which Resistivity logging tool is able to identify the thin beds sharply ??
- A.
  
  Laterolog
- B.
  
  Induction Log
- C.
  
  Micro Spherically Focused Log (MSFL)
- D.
  
  All of the above
13.

In electrical logging the measured resistivity of flushed zone is 19.2 ohm-m , the resistivity of mud filtrate is 1.33 ohm-m and computed value of residual oil saturation in flushed zone is 20 % . What is the value of Formation Resistivity Factor ???
- A.
  
  9.24
- B.
  
  8.50
- C.
  
  9.11
- D.
  
  8.85
14.

No current source is used for SP Log recording .
- A.
  
  True
- B.
  
  False
15.

Induction Resistivity Tool is preferred over Latero-Type tools in non conductive muds .
- A.
  
  True
- B.
  
  False
16.

Depth of Investigation of Focussed Current resistivity tools is less than unfocussed tools .
- A.
  
  True
- B.
  
  False
17.

It is possible to record certain logs simultaneously .
- A.
  
  True
- B.
  
  False
18.

Free fluid index (FFI) of a formation is estimated from ::
- A.
  
  Neutron Log
- B.
  
  Resistivity Log
- C.
  
  SP Log
- D.
  
  NMR Log
19.

Litho-density Log works on the principle of :
- A.
  
  Compton Scattering
- B.
  
  Photoelectric absorption
- C.
  
  Pair production
- D.
  
  All of the above
20.

In a shale formation , which clay mineral are most radioactive ?
- A.
  
  Illite
- B.
  
  Kaolinite
- C.
  
  Chlorite
- D.
  
  Montmorillonite
21.

A log that helps in finding the fractured porosity is: :
- A.
  
  Neutron
- B.
  
  Density
- C.
  
  Sonic
- D.
  
  NMR
22.

Positive SP is developed against reservoir section when salinity of formation water is more than the salinity of mud filtrate .
- A.
  
  True
- B.
  
  False
23.

How depth of invasion of mud filtrate is related to porosity ??
- A.
  
  Directly proportional
- B.
  
  Inversely proportional
- C.
  
  Independent
- D.
  
  Exponentially related
24.

Temperature range for oil window is :
- A.
  
  0 -100 degree celsius
- B.
  
  60-175 degree celsius
- C.
  
  100-325 degree celsius
- D.
  
  None of the above
25.

Which of the following log is used for depth matching and well to well correlation while running with other logs ??
- A.
  
  Natural Gamma Log
- B.
  
  Gamma Gamma log
- C.
  
  Neutron log
- D.
  
  None of these