The general formula of naphthenes is
Anonymous Poll
28%
(A) CnH2n+2
35%
(B) CnH2n-6 (where, n ≥ 6)
10%
(C) CnHn-4
26%
(D) Same as that for olefins i.e. CnH2n
Carbon percentage (by weight) in crude petroleum may be about
Anonymous Poll
30%
(A) 65
23%
(B) 75
37%
(C) 85
10%
(D) 95
Which of the following has maximum hydrogen/carbon ratio (by weight)?
Anonymous Poll
36%
(A) Naphtha
37%
(B) Gasoline
13%
(C) Diesel
13%
(D) Fuel oil
The torque on a motor shaft follows a sinusoidal pattern with a maximum amplitude of 8,000 ft-lbf. The torque will always be positive through the cycle. Shaft speed is 200 rpm. Calculate the motor horsepower.
Anonymous Poll
40%
3214
36%
1219
21%
5521
3%
7321
Subsea wells may be installed individually, in a clusters, or on a template where the reservoir fluids from all the wells are channeled to a manifold that is tied back to a host platform.
Template System: A subsea production facility where the wells, connectionsand manifolds are on a common supporting structure or template.
Cluster Well System: A centrally located manifold around which independent satellite wells are clustered. These wells individually connect to theproduction manifold.
Which type of system is shown above ?
Template System: A subsea production facility where the wells, connectionsand manifolds are on a common supporting structure or template.
Cluster Well System: A centrally located manifold around which independent satellite wells are clustered. These wells individually connect to theproduction manifold.
Which type of system is shown above ?
What will be the effect on permeability when specific surface decreases?
Anonymous Poll
42%
a) Decrease
42%
b) Increase
17%
c) Remains same
Estimate the total theoretical maximum overpressure gradient in lb/feet3 if the specific gravity of is earth crust taken equal to 2.7. Consider porosity of average sedimentary rock equals to 20 %. The specific gravity of saltwater taken to be 1.07.
Anonymous Quiz
13%
120
29%
152
51%
148
8%
190
Unconventional reservoirs are not characterised by _____
Anonymous Quiz
16%
Low Permeability
16%
Same Reservoir & Source Rock
22%
Large Areal Extent
47%
Uniform Reservoir Properties
Which one of the following logging techniques is most suitable to detect a shale layer sandwiched between two sandstone layers?
Anonymous Quiz
37%
Neutron-Gamma
24%
Gamma-Gamma
28%
Natural Gamma
11%
Sonic
There are known effects of gas on logging tool responses. Which of the following statements is correct?
Anonymous Quiz
16%
Density log porosities are not affected by gas
38%
Neutron log porosities are increased by gas
27%
NMR log porosities are reduced by gas
19%
Sonic log porosities are reduced by gas
__________represents the relative effect of viscous forces and surface tension acting across the interface between two immiscible liquids.
Anonymous Quiz
74%
a) capillary number
23%
b) Reynolds number
3%
c) Formation volume factor
DIRECTION, MOTION & ENVIRONMENTAL FORCES at OFFSHORE
Wind force is given by
Fw = 0.00338 (Vw)^2 *Ch *Cs* A
where Fw = wind force, lbf,
VA = wind velocity, knots,
Cs = shape coefficient,
Ch - height coefficient, and
A = projected area of all exposed surfaces, sq. ft.
Current force is given by
Fc=gc*(Vc )^2*Cs*A,
where Fc = current drag force, lbf,
Vc = current velocity, ft/sec,
Cs =drag coefficient same as wind coefficient, and
A = projected area of all exposed surfaces, sq. ft.
Wind force is given by
Fw = 0.00338 (Vw)^2 *Ch *Cs* A
where Fw = wind force, lbf,
VA = wind velocity, knots,
Cs = shape coefficient,
Ch - height coefficient, and
A = projected area of all exposed surfaces, sq. ft.
Current force is given by
Fc=gc*(Vc )^2*Cs*A,
where Fc = current drag force, lbf,
Vc = current velocity, ft/sec,
Cs =drag coefficient same as wind coefficient, and
A = projected area of all exposed surfaces, sq. ft.
🕹Refining Of CRUDE- is Boiling Oil👇🏼
A large part of refining involves separating the different fractions of crude oil and other intermediate streams. While water boils at a single temperature, crude oil boils over a wide range of temperatures. By controlling the temperature using very tall distillation columns, different fractions of the crude oil can be separated.
At the top of the column, fuel gas and liquefied petroleum gas (or LPG) is produced. A little lower down the column, gasoline (or, more precisely, one of the blending stocks for gasoline called naphtha) is withdrawn. Still lower down the column, jet fuel and diesel fuel are produced.
A large part of refining involves separating the different fractions of crude oil and other intermediate streams. While water boils at a single temperature, crude oil boils over a wide range of temperatures. By controlling the temperature using very tall distillation columns, different fractions of the crude oil can be separated.
At the top of the column, fuel gas and liquefied petroleum gas (or LPG) is produced. A little lower down the column, gasoline (or, more precisely, one of the blending stocks for gasoline called naphtha) is withdrawn. Still lower down the column, jet fuel and diesel fuel are produced.
What is the common drilling fluid type which is widely used in drilling?
a) Compressed air
b) Oil-based mud
c) Foam-based mud
d) Water-based mud
a) Compressed air
b) Oil-based mud
c) Foam-based mud
d) Water-based mud