5 - Volumes & Maasp

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This quiz contains 25 questions on Volumes & MAASP which will help you prepare for your next Well Control School.

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Welcome to Well Control Practice Quiz Five. Before you start ensure you are running on full screen.There should only be a line with File, Edit, View etc at the top of the screen. If you can see more

This quiz contains 25 questions on Volumes & MAASP which will help you prepare for your next

Select a question from the Question Bank and choose from the answers given.

To select a question simply click on the appropriate button. Take your time answering as

To answer simply click on the "SELECT" button to the left of your choice for the question.

If you have answered correctly you will be told so and your score will be adjusted accordingly.

If you have answered incorrectly you will get a brief explanation of how to tackle the question

Each time you return to the Question Bank you will be able to see your running score.

than this then click on "View" from the top line above and select "Full Screen" from the drop down menu.

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CORRECT - WELL DONE

QUESTION ONE

What is the MAASP in the following case?

MAMW = 16.0 ppg; Current Mud Weight = 12.0 ppg; Shoe TVD @ 6000 feet

A: 1428 psi

B: 1248 psi

C: 1824 psi

D: 1384 psi

E: 1142 psi

MAMW = 16.0 ppg; Current Mud Weight = 12.0 ppg; Shoe TVD @ 6000 feet

WRONG - SORRY NOT CORRECTMAASP is the difference in hydrostatic pressure at the shoebetween the maximum mud weight and the current mud weight.

MAASP = (MAMW - CMW) x Shoe TVD x .052

QUESTION TWO

MAMW = 16.5 ppgCMW = 12 ppgShoe TVD = 7500 feet

MAASP = ?

A: 1952 psi

B: 2324 psi

C: 2692 psi

D: 1755 psi

E: 3132 psi

WRONG - SORRY NOT CORRECTMAASP is the difference in hydrostatic pressure at the shoebetween the maximum mud weight and the current mud weight.


QUESTION THREE

Drillpipe capacity = .01776 bbl/ftDrill collar capacity = .0076 bbl/ftBit is at 12000 feet MD with 960 ft of collars.

What is the string volume?

A: 304.2 bbls

B: 402.4 bbls

C: 258.8 bbls

D: 203.3 bbls

E: 196.7 bbls

WRONG - SORRY NOT CORRECTVolume = capacity x length

Drillpipe length = MD - Collar Length.

Work out Drillpipe & Collar volumes and add together.

WRONG - SORRY NOT CORRECT


QUESTION FOUR

The string volume is 203.4 bbls and the pump output is .147 bbl/stk.

How many strokes are needed to pump kill mud to the bit?

A: 1383 stks

B: 1843 stks

C: 1438 stks

D: 3148 stks

E: 3481 stks

The string volume is 203.4 bbls and the pump output is .147 bbl/stk.

WRONG - SORRY NOT CORRECTStrokes = Volume/Pump Output

QUESTION FIVE

MD = 12000 feet; Casing Shoe set at 8600 feet; DP/OH Annular Capacity = .0459 bbl/ftDC/OH Annular Capacity = .03 bbl/ft x 960 feet; Pump Output = .147 bbl/stk.

How many strokes are needed to pump from bit to shoe?

A: 826 stks

B: 713 stks

C: 1095 stks

D: 1144 stks

E: 957 stks

WRONG - SORRY NOT CORRECTFirst you need to find out the length of open hole = MD - Shoe Depth

Next you need to calculate the length of the DP/OH Annulus whichis done by subtracting the collar length from the open hole length You now need to work out the two annular volumes DC/OH & DP/OHand add them together to get the total open hole volume

Finally divide this volume by pump output to get strokes


Next you need to calculate the length of the DP/OH Annulus whichis done by subtracting the collar length from the open hole length

You now need to work out the two annular volumes DC/OH & DP/OHand add them together to get the total open hole volume


QUESTION SIX


How many strokes are needed to pump from bit to shoe?

A: 1275 stks

B: 1433 stks

C: 1531 stks

D: 1686 stks

E: 1822 stks


Next you need to calculate the length of the DP/OH Annulus whichis done by subtracting the collar length from the open hole length You now need to work out the two annular volumes DC/OH & DP/OHand add them together to get the total open hole volume



Next you need to calculate the length of the DP/OH Annulus whichis done by subtracting the collar length from the open hole length

You now need to work out the two annular volumes DC/OH & DP/OHand add them together to get the total open hole volume


QUESTION SEVEN

The 9 5/8" casing shoe was set at 9000 feet TVD. A LOT was performed with 12.0 ppg mud and a surface pressure of 2500 psi was recorded when leak off occurred.

What is the Maximum Allowable Mud Weight.

A: 13.74 ppg

B: 14.37 ppg

C: 14.73 ppg

D: 17.34 ppg

E: 18.22 ppg

WRONG - SORRY NOT CORRECTMAMW = Surface Leak Off Pressure + Test Mud Weight Shoe TVD x .052

WRONG - SORRY NOT CORRECTMAMW = Surface Leak Off Pressure + Test Mud Weight

QUESTION EIGHT


What pressure was exerted on the formation at the shoe at leak off?

A: 7026 psi

B: 1750 psi

C: 5276 psi

D: 2133 psi

E: 1709 psi


What pressure was exerted on the formation at the shoe at leak off?

WRONG - SORRY NOT CORRECTAt the time of leak off the shoe is feeling the pressure being exertedat surface along with the hydrostatic pressure of the column of mud.

QUESTION NINE

Mud Weight in use = 12.4 ppg; Surface Leak Off Pressure = 3640 psi with 11 ppg test mudShoe TVD = 10000 feet

What is MAASP?

A: 920 psi

B: 1962 psi

C: 2036 psi

D: 2178 psi

E: 2912 psi

Mud Weight in use = 12.4 ppg; Surface Leak Off Pressure = 3640 psi with 11 ppg test mud

WRONG - SORRY NOT CORRECTFirst calculate the MAMW = Surface Leak Off Pressure + Test Mud Weight Shoe TVD x .052

Then calculate MAASP which equals (MAMW - CMW) x Shoe TVD x .052

WRONG - SORRY NOT CORRECTFirst calculate the MAMW = Surface Leak Off Pressure + Test Mud Weight

Then calculate MAASP which equals (MAMW - CMW) x Shoe TVD x .052

QUESTION TEN

When should MAASP be re-calculated?

A: After every bit change

B: After every 1000 feet drilled

C: After every mud weight change

D: After a successful BOP test

E: After all of the above

WRONG - SORRY NOT CORRECTMAASP needs to be re-calculated after every change in mud weight.

QUESTION ELEVEN

What is the surface to bit circulating time if the string volume is 95 bbls, the pumpoutput is .123 bbl/stk and the pump speed is 25 SPM?

A: 15 mins

B: 20 mins

C: 25 mins

D: 30 mins

E: 35 mins

What is the surface to bit circulating time if the string volume is 95 bbls, the pump

WRONG - SORRY NOT CORRECTSrokes = volume/pump output

Time = strokes/SPM

QUESTION TWELVE

The fracture gradient of a well is .606 psi/ft at the casing shoe (4500 feet MD/TVD).

The drilling mud gradient is .495 psi/ft.

How much pressure can be closed in on the casing gauge before breaking down theformation at the shoe?

A: 450 psi

B: 500 psi

C: 600 psi

D: 650 psi

E: 1000 psi

The fracture gradient of a well is .606 psi/ft at the casing shoe (4500 feet MD/TVD).

How much pressure can be closed in on the casing gauge before breaking down the

WRONG - SORRY NOT CORRECTThis is a MAASP question using gradient in place of mud weight

Fracture gradient is maximum allowable mud weight

You are bieng asked to calculate MAASP and can do so using:

MAASP = (Fracture Gradient - Mud Gradient) x Shoe TVD

WRONG - SORRY NOT CORRECTThis is a MAASP question using gradient in place of mud weight

You are bieng asked to calculate MAASP and can do so using:

MAASP = (Fracture Gradient - Mud Gradient) x Shoe TVD

QUESTION THIRTEEN

Well depth is 7218 feet with 650 feet of drill collars.

Drill Collar Capacity = .00768 bbl/ft and Drillpipe Capacity = .01776 bbl/ft.

What is the approximate drill string volume?

A: 121.6 bbls

B: 128.1 bbls

C: 116.6 bbls

D: 177.5 bbls

E: 257.7 bbls

Drill Collar Capacity = .00768 bbl/ft and Drillpipe Capacity = .01776 bbl/ft.

WRONG - SORRY NOT CORRECTVolume = capacity x length

Drillpipe length = MD - Collar Length.


QUESTION FOURTEEN

The drill string volume is 121.6 bbls. The pump output is .1895 bbl/stk.

What is the approximate surface to bit time at 45 SPM?

A: 14 mins

B: 16 mins

C: 18 mins

D: 20 mins

E: 22 mins

The drill string volume is 121.6 bbls. The pump output is .1895 bbl/stk.

WRONG - SORRY NOT CORRECTStrokes = volume/pump output

Time = strokes/SPM

QUESTION FIFTEEN

The annulus holds a total of 346 bbls of mud. The pump output is .1895 bbl/stk.

How long will it take to circulate bottoms up at 60 SPM?

A: 44 mins

B: 49 mins

C: 30 mins

D: 26 mins

E: 53 mins

The annulus holds a total of 346 bbls of mud. The pump output is .1895 bbl/stk.

WRONG - SORRY NOT CORRECTStrokes = volume/pump output

Time = strokes/SPM

QUESTION SIXTEEN

Surface line volume does not have to be taken into consideration when pumpingKill Mud down the string.

A: True

B: False

C:

D:

E:

Surface line volume does not have to be taken into consideration when pumping

WRONG - SORRY NOT CORRECTKil mud is only helping you hydrostatically when it is going downthe string so it is important to know when this is.

You need to know surface line volume.

WRONG - SORRY NOT CORRECTKil mud is only helping you hydrostatically when it is going down

QUESTION SEVENTEEN

A LOT Pressure of 1800 psi is recorded at surface with 12 ppg mud in the hole.

What is the maximum allowable mud weight if the shoe is set at 9000 feet TVD?

A: 12.5 ppg

B: 15.8 ppg

C: 18.2 ppg

D: 16.4 ppg

E: 13.5 ppg

A LOT Pressure of 1800 psi is recorded at surface with 12 ppg mud in the hole.

What is the maximum allowable mud weight if the shoe is set at 9000 feet TVD?

WRONG - SORRY NOT CORRECTMAMW = Surface Leak Off Pressure + Test Mud Weight Shoe TVD x .052

WRONG - SORRY NOT CORRECTMAMW = Surface Leak Off Pressure + Test Mud Weight

QUESTION EIGHTEEN

The Leak Off Test shows the amount of surface pressure added to the column ofmud hydrostatic to cause a formation break down.

A: True

B: False

C:

D:

E:

The Leak Off Test shows the amount of surface pressure added to the column of

WRONG - SORRY NOT CORRECTIt is True.

QUESTION NINETEEN

A Leak Off Test is used to determine the maximum mud weight or maximumsurface pressure before lost circulation is likely to occur at the shoe.

A: True

B: False

C:

D:

E:

A Leak Off Test is used to determine the maximum mud weight or maximumsurface pressure before lost circulation is likely to occur at the shoe.

WRONG - SORRY NOT CORRECTIt is True.

QUESTION TWENTY

A LOT was conducted with the Casing Shoe set at 8885 feet TVD using 10.7 ppg mudand the Maximum Allowable Mud Weight was calculated as being 17.6 ppg.

Well depth is now 11275 feet TVD and 14.6 ppg mud is being used.

What is MAASP?

A: 3187 psi

B: 1758 psi

C: 4045 psi

D: 1801 psi

E: 1386 psi

WRONG - SORRY NOT CORRECTMAASP = (MAMW - CMW) x Shoe TVD x .052

The well may be deeper but the shoe has not moved.

QUESTION TWENTY ONE



What is MAASP?

A: 2984 psi

B: 671 psi

C: 1541 psi

D: 2078 spi

E: 933 psi

WRONG - SORRY NOT CORRECTMAASP = (MAMW - CMW) x Shoe TVD x .052


QUESTION TWENTY TWO

In order to get accurate leak off test information you need:

A: Known shoe TVD

B: Known and consistent mud weight in the well

C: An accurate pressure gauge

D: All of the above

E: None of the above

WRONG - SORRY NOT CORRECTYou need all three for an accurate leak off test.

QUESTION TWENTY THREE

If the fracture gradient is .85 psi/ft what is the maximum allowable mud weight?

A: .16.3 ppg

B: 18.2 ppg

C: 14.7 ppg

D: 15.8 ppg

E: 12.4 ppg

QUESTION TWENTY THREE

If the fracture gradient is .85 psi/ft what is the maximum allowable mud weight?

WRONG - SORRY NOT CORRECTFracture gradient gives maximum mud weight if you divide by .052,

QUESTION TWENTY FOUR

Fracture gradient is .775 psi/ft at Shoe TVD of 7200 feet.

What pressure was applied at surface if 9.5 ppg test mud was used at the LOT?

A: 5580 psi

B: 2021 psi

C: 3556 psi

D: 1977 psi

E: 2456 psi

QUESTION TWENTY FOUR


WRONG - SORRY NOT CORRECTSurface Leak Off Pressure at the test is MAASP for the test mud.

Firstly convert Fracture Gradient to MAMW by dividing by .052.

Then apply to the MAASP formula using test mud as current mud weight.


QUESTION TWENTY FIVE

Fracture gradient is .91 psi/ft at Shoe TVD of 9855 feet.


A: 8968 psi

B: 6303 psi

C: 4378 psi

D: 3155 psi

E: 2664 psi

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5 - Volumes & Maasp

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