For determining a hydrogen concentration (pH) of mud

1. Koya University
Faculty of engineering
Petroleum department
Drilling engineering laboratory
(PH)
Mar.31th
.2015
Lab EXP. (7)
Supervised By Prepared By
Mr. Pishtiwan Bakhtiar Star M.
Eng. Muhamad
Submitted on: April.7th
2015

2. Table of Contents
Objective…………………………………………………………………………………………………………3
Theory ……………………………………………………………………………….4
Introduction of experiment …………………………………………………………..5
Procedure ……………………………………………………………………………..6-
Calculation ……………………………………………………………………………7
Discussion………………………………………………………………………….....8
Reference ……………………………………………………………………………..9

3. Objective
For determining a hydrogen concentration (pH) of mud.

4. Theory
The pH is important because it affects the solubility of the organic thinners,
contaminant removal, corrosion mitigation and the dispersion of clays
presents in the mud.
PH is a value representing the hydrogen ion concentration in liquid. We use
it to indicate acidity or alkalinity of drilling mud especially water base
mud. Let’s talk about general of the pH. The pH is presented in a numerical
value (0-14) which means an inverse measurement of hydrogen
concentration in the fluid.
The pH formula is listed below;
pH = -log10[H]
Where: H is the hydrogen ion concentration in mol.
According to the pH formula, the more hydrogen atoms present, the more
acidity of substance is but the pH valve decreases. Generally speaking, the
pH of 7 means neutral. Fluids with a pH above 7 are considered as alkaline.
On other hand, the fluids with pH below 7 are defined as acidic.
In the drilling mud, there are three main chemical components involving in
Alkalinity of drilling fluid which are bicarbonate ions (HCO3-), hydroxyl
ions (OH-), and carbonate ions (CO3-2). As you may not know about what
is the Alkalinity. The Alkalinity means ions that will reduce the acidity.
So as to get accurate measurements for the pH, you need to use a pH meter
instead of using a pH paper because it can give you more accurate figures.
However, you need to ensure that the pH meters should be calibrated
frequently. James D. Watson. (2000)

5. Introduction of experiment:
( PH meter )

6. Procedure
Calibration
1-Put the electrode in distilled water.
2-Wait for the meter to stabilize, then adjust the meter until it reads
a pH of 7.00.
3-Remove the electrode from the solution and rinse it with distilled
water.
Test
1-Place the electrode in the mud which we want monitor pH.
2-Wait a moment for the meter to stabilize, then read and record the
pH of mud.
3-Remove the electrode and you can repeat the test to get more
accurate result.

7. Calculation

8. DISCUSION
PH is a value representing the hydrogen ion concentration in liquid. We use
it to indicate acidity or alkalinity of drilling mud especially water base mud
Some point in this experiment we noticed, we can discuss like that:
1-pH measurements are important in petroleum , so we have to beware
about the (ph) of mud and test (ph) for a mud when we pump mud in to the
hole and returning mud
2- it’s important because it affects the solubility of the organic thinners,
contaminant removal, corrosion mitigation and the dispersion of clays
presents in the mud
3-The temperature is not standard for the test so temperature great effect on
the value of (PH).standard temperature is 25 C,but the temperature was 14.6
C.
4-We have to wait till the reading of ph meter stabilize, but we don’t wait
until the reading stabilize perfectly
5-wash the electrode with distilled water and dry, before we start the
assessment.
6-We should be stirring the mud perfectly.

9. References
1- AK Yetisen, H Butt, F da Cruz Vasconcellos, Y Montelongo, CAB Davidson, J Blyth, JB Carmody, S Vignolini,
U Steiner, JJ Baumberg, TD Wilkinson and CR Lowe (2013). "Light-Directed Writing of Chemically Tunable
Narrow-Band Holographic Sensors.". Advanced Optical Materials. doi:10.1002/adom.201300375
2- Travis, Anthony S.; Schröter, H.G.; Homburg, E.; Morris, P.J.T. (1998). Determinants in the evolution of the
European chemical industry : 1900-1939 : new technologies, political frameworks, markets and companies.
Dordrecht: Kluwer Acad. Publ. p. 332. ISBN 978-0-7923-4890-0. Retrieved 29 May 2015.
3- Arnold Thackray and Minor Myers, Jr. ; foreword by James D. Watson. (2000). Arnold O. Beckman : one
hundred years of excellence. Philadelphia, Pa.: Chemical Heritage Foundation
4- "Development of the Beckman pH Meter". National Historic Chemical Landmarks. American Chemical
Society. Retrieved March 25, 2013.
5- Luther, Claudia (May 19, 2004). "Arnold O. Beckman, 104". Chicago Tribune News. Retrieved 8 March 2014.
6- Jaehnig, Kenton G. "Finding Aid to the Beckman Historical Collection 1911 - 2011 (Bulk 1935 - 2004 )".
Chemical Heritage Foundation. Chemical Heritage Foundation Archives. Retrieved 30 October 2015. Click on
'Beckman Historical Collection Finding Aid' to go to full document