Cased Hole Logging: Cement Logs
Date: TBA | Location: TBA
Course Duration: 1 week
Interpretation & QA/QC
(This course can be modified to focus on cement logs only)
Workshop: You can bring your own logs to the course to be interpreted by our specialist instructor
Who Should Attend:
The course is intended for early career engineers as well as for more experienced subsurface workers needing to better understand the principles of cased hole log interpretation and to update themselves on the range of log measurements and techniques now available to them.
Objectives:
This course covers traditional and new technology tools used in today’s cased hole production logging. The basic principles of measurements of the tool sensors and their QCs are discussed along with their applications and limitations. Fundamentals of production log interpretation in vertical, deviated and horizontal wells are also covered with the use of field examples and worked exercises from field data, both producing and injection wells are covered. Participants are encouraged to attend with cased hole log examples for group discussions.
The basic principles of horizontal production logging would be introduced using the Schlumberger FSI, Open Fields FAST and Soundex MAPS logging tools.
The basic principles of measurement along with interpretation methods of today’s most common cased hole saturation monitoring tools, PNL (pulse neutron log) would be covered using examples.
Well integrity is covered, and it includes mechanical and ultrasonic methods of measuring casing thicknesses and diameters for casing and tubing inspection. Casing inspection can be used to detect mechanical damage, corrosion, scale and other problems. It also includes the traditional CBL/VDL logs and ultrasonic pulse echo imaging tools used in the evaluation of casing cementation.
Learning Outcomes:
On completion of this course, participants will have built up competence in their ability to understand the results of cased hole logs and their interpretation to the Basic Application Level. They would become familiar with the principles of measurement of common cased hole logging tools and their interpretation methodologies, improving their ability to diagnose cased hole well issues.
Participants completing this course will be able to:
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- Use the principle of measurement to better understand cased hole production logs data
- Quickly calculate percentage zonal contributions for producing layers in a producing/injection well using production log data.
- Apply skills covered to calculate zonal and total flow contributions in the well
- Determine phase fluid split in a producing well
- Use production log data to quickly identify zones of increased water or gas production
- Calculate from PNL data, oil saturation of a reservoir sand using time lapse and water saturation methods
- Determine the presence of gas in a formation using PNL “Gas Detection” methods
- Interpret a cement evaluation log to determine the presence and extent of cement in a cemented casing
- Identify the presence of channels in a cemented well using Ultrasonic imaging tools
- Establish the degree of mechanical damage in a casing or tubing using Ultrasonic and mechanical caliper tools
- Calculate casing metal loss and burst pressure from Ultrasonic and mechanical tool data
Content
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- Common conveyance systems
- Depth measurements
- Reservoir basic concepts
- Phase behaviour of hydrocarbon
- Fluid flow fundamentals
- Fluid flow conversion
- Objectives of Production Logging Tools
- Job planning and acquisition requirements for Production Logging
- Production Logging measurements and their principles
- Basic production logging interpretation
- Temperature and pressure measurements, interpretation and uses
- Fluid identification and influx monitoring
- Multi-phase flow sensors
- Measuring liquid holdup in wellbore
- Two-phase flow theory and interpretation
- Three-phase flow situations and interpretation
- Production logging in horizontal wells
- Horizontal job design and examples
- Saturation related problems
- Introduction to nuclear interactions
- Pulse neutron tools
- Pulse neutron interpretation
- Cased Hole Resistivity overview
- Cementation review
- Cement evaluation tools and principles of measurement
- Formation isolation using sonic and ultra sonic tools
- Corrosion monitoring tools
- Corrosion examples
- Probe tools