An Interactive 5-Day Training Course
Mud Logging Fundamentals
Reading Cuttings and Gas
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Duration
5 Days
Price
$ 2,500
Starting From
25 Oct 2027
Mud Logging Fundamentals
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Mud Logging Fundamentals - DC-MUD-PEA27
| Code | Date | Time | Duration | Location | Currency | Early Bird Fee Per Person |
|---|---|---|---|---|---|---|
| DC-MUD-PEA27 | 25 - 29 Oct 2027 | 10 AM CST | 4 Hours / Day |
Online |
USD |
2500 |
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Mud Logging Fundamentals
This course covers mud logging practice. Participants study the mud logging unit and its sensors, cuttings collection, preparation and description, lag calculation, gas detection and analysis, gas ratio interpretation, drilling parameter monitoring, hydrocarbon shows evaluation, log preparation and the use of mud logging data in drilling and geological decisions.
Description
Mud logging is continuous surveillance of the well from surface measurements: what comes out of the hole, what gas it carries and how the rig is drilling. It provides lithology, hydrocarbon shows, pressure indications and drilling performance data at low cost, and it is often the first evidence of a change downhole.
This course covers the discipline. It starts with the mud logging unit, its sensors and data acquisition, then covers cuttings: collection, lag calculation and depth assignment, washing, preparation and description, including lithology, porosity estimates and fluorescence. It covers gas detection and analysis, chromatography, gas ratios and their interpretation, and background, connection and trip gas. It then covers drilling parameter monitoring and the calculated parameters derived from it, hydrocarbon show evaluation, the mud log itself and its preparation, and the use of mud logging data in drilling decisions, pressure monitoring and geological correlation.
Lag is the first thing to get right. Cuttings arriving at surface were drilled some time earlier, and assigning them to the wrong depth makes every description wrong. Lag depends on annular volume and flow rate and changes as the hole deepens and the string changes, so it is calculated and checked rather than assumed.
Gas data is the most used and most misread output. Total gas depends on what the formation contains but also on penetration rate, mud properties, degasser efficiency and flow rate, so comparisons are only valid when those are stable. Gas ratios are more robust because they compare components within the same sample, which is why they are used for fluid typing.
Mud logging is also the drilling team's early warning. Changes in gas, cuttings volume, shale density, drilling rate and torque often appear before anything shows in pressure or returns, and a mud logger who understands what the drilling team needs to know is a valuable part of the rig crew rather than a data recorder.
By the end of this training, participants will be able to:
- Describe the mud logging unit, its sensors and data acquisition.
- Calculate lag and assign cuttings to the correct depth.
- Collect, prepare and describe cuttings samples.
- Estimate lithology, porosity and shows from cuttings.
- Operate and interpret gas detection and chromatography systems.
- Interpret gas ratios and distinguish gas sources.
- Monitor and interpret drilling parameters and derived calculations.
- Evaluate hydrocarbon shows and report them appropriately.
- Prepare a mud log to professional standards.
- Use mud logging data to support drilling, pressure and geological decisions.
The course is instructor-led. Cuttings description and show evaluation are taught with sample material and photographs, and gas interpretation with real chromatograph data and mud logs. Participants prepare and interpret mud logs and work through pressure and lithology interpretation exercises. Participants are encouraged to bring their own mud logs for discussion.
Organisations sending participants to this training will:
- Improve the quality and usefulness of mud logging data.
- Detect formation and pressure changes earlier.
- Improve lithology and show reporting accuracy.
- Strengthen the link between mud logging and drilling decisions.
- Improve oversight of mud logging contractors.
Participants will:
- Understand how a mud logging unit works.
- Be able to calculate lag and describe cuttings accurately.
- Be able to interpret gas data and ratios.
- Be able to evaluate hydrocarbon shows.
- Be able to prepare and use a mud log.
- Mud loggers and data engineers
- Wellsite and operations geologists
- Drilling engineers
- Rig site supervisors
- Petrophysicists using mud log data
- Graduate geoscientists entering wellsite roles
Module 1: The Mud Logging Unit
- Unit layout and equipment
- Sensors and data acquisition
- Calibration and maintenance
- Roles and shift structure
- Interfaces with the rig crew
Module 2: Lag and Depth Control
- Annular volume calculation
- Lag time and lag strokes
- Checking lag with tracers
- Depth assignment of samples
- Errors and their consequences
Module 3: Cuttings Collection and Preparation
- Sampling frequency and procedure
- Washing and sieving
- Sample preservation
- Contamination and caving recognition
- Sample storage and shipment
Module 4: Cuttings Description
- Lithology description conventions
- Colour, texture and mineralogy
- Porosity estimation
- Calcimetry and basic tests
- Describing under the microscope
Module 5: Gas Detection and Analysis
- Gas extraction and degassers
- Total gas detectors
- Gas chromatography
- Calibration and response
- Factors affecting gas readings
Module 6: Gas Interpretation
- Background, connection and trip gas
- Gas ratio methods
- Fluid typing from gas composition
- Pressure indications from gas trends
- Common misinterpretations
Module 7: Drilling Parameters
- Parameters recorded and their sensors
- Rate of penetration normalisation
- D-exponent and derived parameters
- Torque, pressure and pit volume monitoring
- Alarms and warnings
Module 8: Hydrocarbon Shows
- Fluorescence and cut testing
- Show description and grading
- Oil, condensate and gas indications
- False shows and contamination
- Reporting shows
Module 9: The Mud Log and Its Use
- Mud log format and content
- Preparing the log
- Quality control and checking
- Use in drilling decisions
- Use in pressure monitoring and correlation
- Final well reporting
Upon successful completion of this training course, delegates will be awarded an official Certificate of Completion issued by the Petroleum Engineers Association (PEA), an ISO 9001:2015 certified training organization. The certificate carries 10 Credits and formally records the total learning hours completed.
Each certificate is signed by the Course Facilitator and the CEO of the Petroleum Engineers Association, and serves as verifiable proof of professional training that delegates can present to employers and professional bodies worldwide.
Frequently Asked Questions
All course bookings made through PEA are strictly non-refundable. By registering for a course, you acknowledge and accept that all fees are payable in full and are not subject to refund under any circumstances, including changes in personal or professional commitments or partial attendance.
PEA reserves the right to make reasonable adjustments to course content, trainers, or schedules where necessary, without entitling delegates to a refund. Comprehensive details of each course — including objectives, target audience, and content — are clearly outlined before enrolment, and it is the responsibility of the delegate to ensure the course's suitability prior to booking.
For any inquiries related to cancellations or bookings, please contact our support team, who will be happy to assist you.
