Mud logging involves monitoring drilling parameters and the lithology, gas content, and oil shows of downhole formations in real-time. A mud logger collects and examines rock cuttings for geological description and oil shows, monitors hydrocarbon gases and hydrogen sulfide levels, and tracks mud volume, drilling parameters, and trip sheets. Issues like losses or gains in mud volume and stuck pipe can occur due to pressure imbalances or poor hole cleaning and require solutions like adjusting mud weight or using a jar tool.

1. Mud logging
By: MOHAMMED ELSAYED

2. Definition
• Mud logging is the implement by which it could be communicating to
the down hole formations systematically and comprehensively to
study and monitor immediately the lithology, gas content, oil shows
and drilling parameters.

3. Mud Types/ Drilling Fluids Types ( Wbm &
Obm )

5. Drilling Fluids Functions
• 1-Hole Cleaning.
• 2-Cooling and Lubricating Drill String.
• 3-Lifting Cutting To The Surface.
• 4-Carrying Information About Formations.
• 5-Stablizing Wellbore.
• 6-Controlling Formation Pressure.
• 7-Susbending Cuttings.

6. Mud Logger Engineer
Duties
• Collection of the Rock Cuttings which is
geologically described, examined for any Oil
Shows.
• Hydrocarbon Gas Monitoring while
Drilling(Chromatograph).
• Detection of the Hydrogen sulfide (H2S)
Percentage.
• Monitoring of the Mud volume.
• Monitoring of the drilling parameters such as
: WOB, RPM, TRQ. ...etc.
• Monitoring the Trips and updating a Trip
Sheet.

7. Problems
• A-Loss(Decreasing)
&Gain(Increasing):
• -Mud’s Hydrostatic pressure is
not equilibrium with FM
pressure.
Solving:
1-Increasing Hydrostatic
Pressure.
2-Decreasing Hydrostatic
Pressure.

8. • B-Stuck:
• 1-Differential Stuck:
• In Permeable Formations.
• 2-Mechanical:
• -Formation instability.
• -Ignore hole cleaning.
• -Key seating.
• -Deferential Sticking Mud Cake too thick
Solving:
1-Calibration Hydrostatic Pressure & Mud Weight.
2-Using Jar Tool.

24. THANK YOU