Mud Retort - Audit

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Mud retort analysis, release 3a, issued 1 July 2008. AUDIT version.

The current release of this worksheet exists in three different versions. They are identical apart from the way they are formatted. The Work version displays the intermediate calculations. The Audit version shows all intermediate calculations. The PDA version removes all text and formats the input and output fields for optimum viewing on a mobile, small-screen device.

User input

 

320

Enter empty retort chamber weight. Frt1 =

 

380

Enter full retort chamber weight. Frt2 =

 

331

Enter final retort chamber weight after retorting. Frt3 =

 

50

Volume of mud sample in chamber. Vrt =

mL

 

45

Volume of distillate after the test. Vdl =

 

40

Volume of water after the test. Vw =

  

Click here when any values are modified to update the result.

Calculations

Note that the first 3 entries are entered in units of grams Force, not Mass. This allows pressure gradients to be calculated first, then divided by g (gravitational acceleration) to find mudweights.

Calculate the pressure gradient of the mud.

Calculate the mud weight of the mud (note; g = acceleration due to gravity converts force based units to mass based units).

Calculate the VOL percentage of oil in the mud.

Calculate the VOL percentage of water in the mud.

Calculate the VOL percentage solids in the mud

Calculate the MASS percentage solids in the mud.

For the oil/water ratio, calculate the volume percentage of oil and water in the fluid part of the mud only.

Results

Pressure gradient of the mud under test.

Mud weight of the mud under test

Mass percentage of solids in the mud.

Volume percentage of solids in the mud.

Volume percentage of oil in the mud.

Oil – water ratio.

Worksheet references

Original formulae from MI Drilling Fluids Handbook, ref MI-0020 6/97.

Version 1 of this worksheet was issued on 27 June 2008.

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