Consortium Alumni Association Presents A One-day Course on

132 Pages·2008·2.07 MB·English

Consortium Alumni Association Presents
A One-day Course on
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• Introduction (8:15)
• Lecture‐I  Basic Theory/Interpretation 
• Break (10 – 10:15)
• Lecture‐II  Logging Program/Design
• Break (12:00)
• Workshop (1:30 – 4:00)
• Wrap‐up (4:00 – 5:00)
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Get to know various log measurements
♦
Recognize fluid type and lithology of major reservoirs, 
♦
and some practical application of log data
Familiarize with factors affecting the log response
♦
Understand the strategy in well evaluation
♦
Get to know various approaches to well logging design
♦
Exercise with well log design
♦
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According to
4th Edition of J.A.Jackson’s Glossary of Geology:
Log : A continuous record as a function of depth,
usually graphic and plotted to scale on a narrow
paper strip, of observations made on the rocks
and fluids of the geologic section exposed in
the well-bore.
Wireline Logging Logging while Drilling
Mud in
Mud out
Cable
LWD Tools
Tools
Drill Bit
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• The first electrical log was introduced in 1927 in France using stationed 
resistivity method.
• The first commercial electrical resistivity tool in 1929 was used in 
Venezuela, USA and Indonesia.
• SP was run along with resistivity first time in 1931
• Schlumberger developed the first continuous recording in 1931
• GR and Neutron logs was started in 1941
• Microresistivity array dipmeter and lateralog were first time introduced 
in 1950’s
• The first induction tool was used in 1956 followed by Formation tester 
in 1957, Fomation Density in 1960’s, Electromagnetic tool in 1978 and  
most of Imaging logs were developed in 1980’s 
• Advanced formation tester was commercialized in early 1990’s
Well in Pechelbronn - France Surface Recording Instrument
The “First” Log recorded in 1927
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Practical definition of a log
Log is an indirect measurement of formation properties 
exposed by the well‐bore acquired by lowering a device or 
a combination of devices in the well bore.
A Formation Evaluation Specialist is essential to understand
The theory of measurements, quality control, interpretation
principles, geophysics and petroleum geology as well as
petroleum reservoirs
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Advantages:
- Continuous measurements
- Easy and quick to work with
- Short time acquisition
- Better resolution than seismic data
- Economical
Limitations:
- Indirect measurements
- Limited by tool specification
- Affected by environment
- Varying resolution
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