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1
Week of February 07 - February 14, 2016 Quiz Winner: Uniquegee.

No member met the target 100% score. However, the highest score of 2.6 out of 4, was by Uniquegee. He is awarded 100% of the week's $50 cash prize.

The target remains Excellence.

2
Click to View This Week's Quiz / Week 23: Questions for $50!
« on: February 08, 2016, 04:31:43 AM »
1.   A  typical gas – condensate well (Well OXY – 002)  with average API 49.50 has the following characteristics;
                                                                                  
Initial Gas production rate  (MMSCFD): 18                                            
Final Gas production rate  (MMSCFD): 7.5
Initial Condensate Production rate(barrel/MMSCFDS): 30             
Final Condensate Production rate(barrel/MMSCFDS): 5
Initial Produced Water Production (BPD): NIL                                      
Final Produced Water Production (BPD): 2,000

a)   Determine the specific gravity of the mixture for both initial and final conditions (Assume specific gravity of produced water to be 1.04)
b)   What is the Gas liquid Ratio for both initial and final condition?



2.   In the design of 50m DIA x 10m height storage tank, first course and bottom plate thicknesses were evaluted to be 10mm.  How many number of plates will be required for the bottom and first course if 1.8 m x 10m x 10mm standard steel plate is selected if the tank contain 6 courses?



3.   A gas is measured at standard condition (600F) to be 25MMCFD.  What is the actual volumetric flow rate of the gas at 1100F and pressure of 5psig? (Use Z = 0.91)



4.   A typical gas mixture consists of the following components;
Methane (C1) =  78%
Ethane (C2) =    8%
Propane (C3) =  6%
Butane (C4) =    5%
C5+              =    3%
Determine the specific gravity and average molecular weight of the gaseous mixture.




To submit answers, click the 'SUBMIT ANSWERS' button.
Type-in your answers.
Click 'Send message'.




SUBMISSION DEADLINE: 23:00hrs WAT, Sunday, February 14, 2016

Winner(s) will be published on Wednesday, February 17, 2016.


3
Week of January 26 - February 02, 2016 Quiz Winner: Vintus12.

No member met the target 100% score. However, the highest score of 3 out of 4, was by Vintus12. He is awarded 100% of the week's $50 cash prize.

The target remains Excellence.

4
Week of January 19 - January 25, 2016 Quiz Winner: NO WINNER.

No member met the target 100% score and no entry received qualifies for partial reward. Hence, no member will be awarded the week's $50 prize.

The target remains Excellence!

5
Click to View This Week's Quiz / Week 22: Questions for $50!
« on: January 27, 2016, 05:20:59 AM »
1)   Common specifications for salable natural gas includes the following EXCEPT
a.   Water Content
b.   Hydrogen Sulphide Content
c.   Vapour Pressure
d.   Gross Heating Value
e.   ALL OF THE ABOVE



2)(a) Determine the Specific gravity of the following crude oil samples with the following API specifications
•   API 45
•   API 36
•   API 12
•   API 19

(b) If a separator is required to process each of the crude oil samples at a production rate of 10,000 BOPD, which of the crude oil samples will require the biggest size of the separator for processing ? Give at least TWO reasons to support your answer.



3)   A  Centrifugal pump with operating speed of 1250 RPM delivers 250 gpm at a TDH of 180 feet and BHP of 10 HP to operate.  What will be the flow rate Q, TDH (Total Delivery Head) and BHP(Break Horse Power) conditions if the operating speed is halved.



4)   Evaluate the pipe friction loss in a 4’’ SCH 40 ASTM 106 , Grade X42 Carbon steel pipe with a flow rate of 250 gpm for crude at 80F and a pipe length of 2.5 Km. The pipe roughness is 0.00015 ft and the viscosity is 1.13 cSt. The crude oil is of API 380




To submit answers, click the 'SUBMIT ANSWERS' button.
Type-in your answers.
Click 'Send message'.




SUBMISSION DEADLINE: 23:00hrs WAT, Monday, February 01, 2016

Winner(s) will be published on Wednesday, February 03, 2016.

6
Week of January 12 - January 18, 2016 Quiz Winner: NO WINNER.

No member met the target 100% score and no entry received qualifies for partial reward. Hence, no member will be awarded the week's $50 prize.

The target remains Excellence!

7
Click to View This Week's Quiz / Week 21: Questions for $50!
« on: January 19, 2016, 08:08:23 AM »
1.  Which of the following methods is the most accurate method for natural gas sampling?
(a). Purge and Fill
(b). Glycol displacement
(c). Water Displacement
(d). None of the above



2. A hydrocarbon reservoir has a GOR of 3500 scf/bbl, how would you classify this reservoir?
(a). Oil
(b). Gas
(c). Condensate
(d). Others
Give REASONS to support your answer.



3.   A reciprocating(Positive Displacement) pump has the following characteristics:
Pump Head       = 2460 ft of head
Stroke length      = 7.125inch
Speed of revolution   = 200rpm
Plunger diameter   = 5.25inch
If this pump is to be used to deliver a crude oil of S.G 0.84 at the flow rate of 20,000 BOPD through 10’’ ASTM A106 Gr B pipe, determine the pump mean plunger speed and NPSH required for the pump to operate.



4. Common specifications for saleable natural gas includes the following EXCEPT
(a). Water Content
(b). Hydrogen Sulphide Content
(c). Vapour Pressure
(d). Gross Heating Value
(e). ALL OF THE ABOVE




Submission Deadline Expired!!!



8
Click to View This Week's Quiz / Week 20: Questions for $50!
« on: January 12, 2016, 05:37:52 AM »
1.   A process engineer specifies the dimension of a 3-phase separator as 35” (O.D) x 40’ (S/S) as the nominal separator size. Is anything wrong with the selection?  If yes, what are the 2 main errors in this specification?



2.   A typical oil well with average API 420 has the following characteristics;
BOPD(Barrels of Oil Per Day)
                                  Initial            Final
Oil Production           10,000          2,000
Water Production      1,000            8,000
Determine the specific gravity of the mixture for both initial and final conditions (Assume specific gravity of produced water to be 1.0)



3.   In the design of 35m DIA x 12.5m height storage tank, first course and bottom plate thicknesses were evaluted to be 12mm.  How many number of plates will be required for the bottom and first course if 2.5m x 10m x 12mm standard steel plate is selected if the tank contain 5 courses?



4.   Crude oil of API 380 and dynamic viscosity of 5.0cp flows through an 8-inch ASTM A106 Grd B Sch 40 pipe at the rate of 500GPM.
The design pressure is given as 100psi, joint efficiency factor is 1.0, design factor is 0.72 and the pipe SMYS is 35,000psi, determine the required pipeline wall thickness.  Use corrosion allowance of 3mm.




Submission Deadline Expired!!!


9
Week of December 15 - December 22, 2015 Quiz Winner: Enwose.

No member met the target 100% score. However, the highest score of 3.2 out of 4, approximately 80% was by Enwose. He is awarded 100% of the week's $50 cash prize.

The target remains Excellence.

10
Week of December 08 - December 14, 2015 Quiz Winner: Vintus12.

The highest score of 4 out of 4, 100% was by Vintus12. He is awarded 100% of the week's $50 cash prize!!!


"Excellence is the gradual result of always striving to do better." - PAT RILEY

11
Click to View This Week's Quiz / Week 19: Questions for $50!
« on: December 15, 2015, 09:58:14 AM »
1.   Determine the crude oil viscosity using Beggs-Robinson equation for a crude oil of API 420 at a flowing temperature of 750F.



2.   A gas is measured at standard condition (600F) to be 13MMCFD.  What is the actual volumetric flow rate of the gas at 1000F and pressure of 2psig? (Use Z = 0.91)



3.   Which of the under listed separator sizes violates ASME vessel code guidelines?
A.   36’’(O.D) x 10’ (S/S) – Vertical Separator
B.   60’’(O.D) x 20’ (S/S) – Horizontal Separator
C.   72’’(O.D) x 20’ (S/S) –  Horizontal Separator
D.   42’’(O.D) x 30’ (S/S) –  Vertical Separator
E.   24’’ (O.D) x  12’ (S/S) – Vertical Separator



4.   A natural gas of S.G 0.65 at a flow rate of 20MMSCFD flows through a 16inch SCH-80 ASTM 106 Grade B carbon steel pipe at inlet pressure of 200psig and temperature of 770F. Determine the Reynold’s number and friction factor (either by moody chart or Swamee-Jain equation). (Take roughness for carbon steel pipe as 0.0018inch, gas viscosity = 0.0013cp, Z = 0.9)




Submission Deadline Expired!



12
Week of November 30 - December 07, 2015 Quiz Winner: Enwose.

No member met the target 100% score. However, the highest score of 2.2 out of 4, approximately 55% was by Enwose. He is awarded 50% of the week's $50 cash prize ($25).

The target remains Excellence.

13
Click to View This Week's Quiz / Week 18: Questions for $50
« on: December 08, 2015, 03:54:29 AM »
1.   Stabilized Crude oil with specific gravity of 0.82 and Kinematic viscosity of 4.1 Centistoke is flowing through a 6-inch S-40 pipe, 12.5km long at the rate of 230 GPM. Calculate the pressure drop across the entire length of the pipe.



2.   A natural gas mixture consists of the following components;
  • Methane (C1) = 75%
  • Ethane (C2) = 16%
  • Propane (C3) = 9%
Determine the specific gravity and average molecular weight of the natural gas mixture.



3.   Using the CNGA equation, determine the compressibility factor of natural gas of specific gravity, 0.65 with average pressure of 500psig and gas temperature of 800F.



4.   A natural gas pipeline made of API 5L X42 14 - inch pipe (wall thickness of 0.5 inch) is 200km long. The inlet pressure is 90bar absolute, the outlet pressure is 20bar absolute and the average temperature is 250F. The gas consists of the following components;
  • Methane (CH4) = 78%
  • Ethane (C2H6) = 19%
  • Propane (C3H8) = 3%
Calculate the flow rate in Million cubic meter/day and MMSCFD using Weymouth and Panhandle B equations. (Use Z = 0.85 and E = 1.0)




Submission Deadline Expired!!!



14
Week of November 22 - November 28, 2015 Quiz Winner: Vintus12.

No member met the target 100% score. However, the highest score of 3 out of 4, was by Vintus12. He is awarded 100% of the week's $50 cash prize.

The target remains Excellence.

15
Click to View This Week's Quiz / Week 17: Questions for $50!
« on: December 02, 2015, 03:12:28 AM »
1.   Evaluate the fluid release (leak) mass flow rate through a 5mm hole when crude oil of API 40 DEG is flowing through a 6-inch S-40 pipe.  (The gauge pressure is 140psig and orifice discharge coefficient Co = 0.70)



2.   A flow rate of 28,500 BOPD (Barrels of Oil Per Day) of API 40 DEG, dynamic viscosity of 5cp of crude oil is required at the delivery point, 5km away from the source Oil storage tank.  The vertical elevation of the delivery point is 80m higher than the centre-line nozzle of the storage tank outlet nozzle. The pressure head available at the source is 150m and the required pressure at the delivery point is 50 psig. What nominal pipe diameter would you recommend for this service? Give reasons for your selection (use f = 0.002).



3.   Crude oil of API 35 DEG, at 75F flows through and 8-inch, Sch 40 pipe at the rate of 300 gpm. Calculate the flow velocity in the pipe.



4.   In a 10km pipeline system, crude oil of API 38 DEG at 80 DEG Fahrenheit flows through ASTM A 106-GrB, 4-inch S-40 pipe at the flow rate of 50,000BPD. Is the selected pipe suitable for the operation? YES/NO : Give justification for your answer.




Submission Deadline Expired!!!


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