Increase Mud Density

Mud weight, ppg, increase with barite (average specific gravity of barite 4.2)

• Example: Determine the number of sacks of barite required to increase the density of 100bbl of 12.0ppg (W ₁) mud to 14.0ppg (W ₂):

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  • Barite = 140 sk/100 bbl

Metric calculation

S.I. units calculation

Volume increase, bbl, due to mud weight increase with barite

• Example: Determine the volume increase when increasing the density from 12.0ppg (W ₁) to 14.0ppg (W ₂):

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  • Volume increase = 9.52bbl per 100bbl

Starting volume, bbl, of original mud weight required to yield a predetermined final volume of desired mud weight with barite

• Example: Determine the starting volume, bbl, of 12.0ppg (W ₁) mud required to achieve 100bbl (V _F) of 14.0ppg (W ₂) mud with barite:

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  • Starting volume = 91.3bbl

Mud weight increase with calcium carbonate (SG 2.7)

• Example: Determine the number of sacks of calcium carbonate/100 bbl required to increase the density from 12.0ppg (W ₁) to 13.0ppg (W ₂):

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  • Sacks/100bbl = 99.5

Volume increase, bbl, due to mud weight increase with calcium carbonate

• Example: Determine the volume increase, bbl/100bbl, when increasing the density from 12.0ppg (W ₁) to 13.0ppg (W ₂):

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  • Volume increase = 10.53bbl per 100bbl

Starting volume, bbl, of original mud weight required to yield a predetermined final volume of desired mud weight with calcium carbonate

• Example: Determine the...