Brine Density with Temperature Correction Calculation

Temperature has an effect on brine density so it is very critical to compensate loss of density due to temperature. Higher wellbore temperature will reduce the brine density more.  The calculation below demonstrates how to determine brine weight to mix on surface in order to get required brine density at a wellbore condition.


Brine weight with temperature correction equation is listed below;

Brine Density to Mix = Brine Density at Average Wellbore Temp + (Average Wellbore Temp – Surface Temp) x Weight Loss Factor


Brine Density to Mix = ppg

Brine Density at Average Wellbore Temp = ppg

Average Wellbore Temp = F

Surface Temp = F

Weight Loss Factor = ppg/F

Weight Loss Factor can be found in the table below;

Brine Weight Loss Table

Determine the weight of brine that you need to mix on surface based on the following information.

Surface temperature = 90 F

Wellbore temperature at TD = 300 F

Density of brine required for this well = 10.0 ppg

Brine Weight Loss Table 2


Average Wellbore Temp = (Surface Temperature + Wellbore Temperature) ÷ 2

Average Wellbore Temp = (90 + 300) ÷ 2= 195 F

According to the table, the weight loss factor for this case is 0.0025 ppg/F. This figure is selected because the desired weight is 10.0 ppg.

Brine Density to Mix = Brine Density at Average Wellbore Temp + (Average Wellbore Temp – Surface Temp) x Weight Loss Factor

Brine Density to Mix = 10 + (195 – 90) x 0.0025

Brine Density to Mix = 10.26 ppg

The brine density on surface must be 10.3 ppg (round up figure) to suit with this condition.

Reference books: Well Control Books

Related Post

BOP Stack Organization and BOP Stack Arrangement Blow Out Preventor (BOP) is a very important part of well control equipment and the first thing which we would like to discuss in this article is the ...
Determine the actual gas migration rate You have learned how to estimate the gas migration rate. Today, I would like to show you how to figure out the actual gas migration rate after you shu...
Understand More about Pipe Rams, Variable Bore Ram... I would like to share these 3 VDO's demonstrating how Pipe Rams, Variable Bore Rams and Shear Rams work. This eliminate confusion when the new peop...
Deepwater Horizon Incident VDO Transocean demonstrates an excellent animated video of the Deepwater Horizon incident. This video will show you what was happened to the Deepwater Hor...
Share the joy
  • 45
Tagged , . Bookmark the permalink.

About DrillingFormulas.Com

Working in the oil field and loving to share knowledge.

2 Responses to Brine Density with Temperature Correction Calculation

  1. Clif Posey says:

    Shouldn’t you use (bht – ((mto – mti)/2) as the average temperature instead of using the bht – surface temperature? It would better represent the average well ire temp. I suppose that may or may not affect your constants.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.