THE UNIVERSITY OF OKLAHOMACOLLEGE OF EARTH AND ENERGY

\MEWBOURNE SCHOOL OF PETROLEUM AND GEOLOGICALENGINEERING - SPRING 2010

PE 4331 - DRILLING AND PRODUCTION LAB QUIZ 2 - 02115/2010 (60 pt.)

Name: FmHIE 'PA'PM~E.A- 0021. Give 2 major functions of drilling fluid

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e\-\Mrr F~Fill~ ~h\S.t /2. Give 3 major physical properties of drilling fluid

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3. Give 3 m jor chemical properties of drilling fluid• !=lPr\M \BlUl'1 s- \/1----~ 5RJV;r LC&S». --) siB pM,CHlDR'~ ~~1~11 co~• 'ECLlre c.~asr/

4.(2) Define pH

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5.(2) What is the main purpose of clay in a water-based fluid?

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.: 6.(5) From the yield curve developed in the lab, do you think the clay used was ofcommercial value? Why or why not?

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7.(10) Compute the yield of clay that requires addition of 30 lbmlbbl of clay to 1 bbl ofwater to raise the apparent viscosity of water to 15 cp. (measured in a FannViscometer at 600 rpm)

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8.(5) Explain why salt influences the viscosity of ater-based clay mud::Atr ,/-,j.C1 WHeIE mERe r.> \'l7 Sl-\cr 1 C<P>'i

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9.(6) Explain how you would handle the problems of drilling through a thick section(500 ft) of salt if you entered the salt with an ordinary water-based clay mud.

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10.(6) Explain the influence of temperature on saturated salt-water mud

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11,(6) List three observations that you saw when water-based fluid with salt is tesrea~

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12.(10) A drilling fluid exhibited a water loss of 8.0 cc in 15 minutes. Assuming noinitial spurt loss occurred, what would be reported as the API filter loss?

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