determine hole cleaning requirement in deviated wells

7/17/2019 Determine Hole Cleaning Requirement in Deviated Wells

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Determine Hole Cleaning

Requirement in DeviatedWells

SPE Paper – 23884 & 2 48!



© MEDCO E&P 2007 All Information are Con dential

Hole Cleaning "e# $a%tor

• Flow rate Critical Flow Rate CFR!• Flow rate i" #e$ %arameter com%are

to ot er" 'aria(le in de'iated well• Mat ematical model for CFR'alidated wit e)%erimental & eldte"tin*




aria'les o( Hole Cleaning)Controlla'le*

• M+d Flow Rate• M+d r eolo*$

• ROP• M+d ,ow re*ime• M+d wei* t

• -ole an*le• -ole "i.e




aria'les o( Hole Cleaning)+n%ontrolla'le*,

• Drill%i%e Eccentricit$• C+ttin*" Den"it$

• C+ttin* "i.e




$or%e -nal#sis




$lo. Patterns




C$R 8/012 ole


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Determine Hole Cleaning

Requirement in DeviatedWells+sing Hole Cleaning C art



aria'les o( Hole Cleaning)Controlla'le*

• M+d Flow Rate• M+d r eolo*$

• ROP• M+d ,ow re*ime• M+d wei* t

• -ole an*le• -ole "i.e



$ormula

/I RF ) AF ) M1• /I /ran"%ort Inde)

• RF R eolo*$ Factor• AF An*le Factor• M1 M+d 1ei* t "*!



-ngle $a%tors



R$ & P5 – 0 /012 ole



R$ & P5 – 02/014 ole



R$ & P5 – 8/012 ole

470



Corre%tion (or .as /out ole

CFR (wash out) = Corr. Factor x CFR (gauge)



E6e%t o( $lo. Regime



E7ample

• 34 P5E6 89:2; ole< M1 90 %%* "* 9=2!<an*le >? de*< P@ 9?< P 20< ROP 50m: r= CFRBB

• An"wer6AF 9=9 RF 0= ?

/I 0= ? ) 9=9 ) 9=2 9=5>?

CFR > ? PM=If wa" o+t to ;6 CFR 9=92)>70 ?2

PM



/-AG4 OH

determine hole cleaning requirement in deviated wells

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