Lab 11 measurement of resistivity of drilling mud and mud cake using resistivity meter.

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This document describes an experiment to measure the resistivity of drilling mud and mud cake using a resistivity meter. The objectives are to measure the resistivity of drilling mud and understand how factors like salt concentration, temperature, and solid content affect resistivity. The procedure involves filling a sample cell with mud, measuring its temperature and resistivity using a resistivity meter, then calculating the salt concentration using a nomograph. Precautions are taken to avoid air bubbles and ensure safety.

Engineering

Experiment # 11
• Objective:
1) Measurement of resistivity of drilling mud and mud cake
using resistivity meter.
5/5/2021

Apparatus
• Resistivity Meter
• Testing Drilling Mud Balance
• PPE’s (Personal Protective Equipments)
5/5/2021

Related Theory
• The resistivity of a drilling mud is influenced by the dissolved salts
(ppm) or (gpg, grain per gallon) in the water portion and the insoluble
solid material contained in the water portion.
• Unlike metals, the resistivity of a solution decreases as temperature
increases.
• It is necessary to measure resistivity because the mud, mud cake, mud
filtrate resistivity exert a strong effect on the electric logs taken in that
mud.
• The mud resistivity varies greatly from the actual resistivity values due
to the various factors encountered in the actual operation
• Resistivity Meter
• Resistivity Meters are electronic meters used to measure
the resistivity of fluids, slurries or semi-solids.
5/5/2021

Measurement Procedure
1) Remove the sample cell from the resistively meter and
fill it with the test sample.
2) When filling the cell with filtrate, fill and discharge the
sample several times before the final filling.
3) Make sure there are no air bubbles in the sample.
4) Reattach the sample cell onto the pains on the meter.
5) Insert the temperature probe in the wall in the sample
cell, set the mods switch to temp and allow the
temperature reading to stabilize. This will take at least
three min if meter and samples are not at room
temperature.
5/5/2021

6) Set the mode switch to RES, read and record the
resistively in ohmmeters.
7) Remove the sample cell and clean with distilled water.
If necessary, a pipe cleaner and mild soap (no solvents)
can be used to clean the bore of the cell.
8) Using the monographer, convert resistively values to
concentrations of chlorides.
5/5/2021

Observation and
Calculations
5/5/2021
Temperature = _______________ ⁰ F
Resistivity = _______________ Ωm
Nacl concentration = _________________ Kppm

Nomograph of Nacl Solution-
Concentration Measurement
5/5/2021

Precautions
1. Make sure there are no air bubbles in the sample.
2. Follow the general safety instructions during
experiment .
3. Wear relevant Personal protective equipment.
5/5/2021

Viva Voce
1. Explain the parameters which influence the resistivity of
a drilling mud?
2. Explain the importance of drilling mud resistivity?
5/5/2021

Viscosity and yield point exp. by jarjis Experiment Number 5: Yield Point. Koya University. Faculty of Engineering. Drilling Lab Supervised By Muhammad Jamal Determine Plastic Viscosity, Apparent Viscosity, And Yield point of a drilling fluid (mud) by using Fann VG viscometer. ============= This a report about Filtration. written by Jarjis Muhammad, Petroleum Engineering Dep. Koya University. For more Information please contact me: www.facebook.com/Jarjis.shaqlawaee

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Rheology model 900 viscometer by jarjis Experiment Number 7: Rheological Properties using Model 900 Viscometer. Koya University. Faculty of Engineering. Drilling Lab Supervised By Muhammad Jamal ============= This a report about Rheological Properties using Model 900 Viscometer.. written by Jarjis Muhammad, Petroleum Engineering Dep. Koya University. For more Information please contact me: www.facebook.com/Jarjis.shaqlawaee

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