SEMINAR OUTLINE: ANALYZING ANCIENT LOGS
"50 Years Of Continuous Petrophysical
Experience, At Your Service"
 
COURSE
SUMMARY
This semi-quantitative course covers topics needed to calculate
shale volume, porosity, water saturation, and permeability from older (pre 1968)
open and cased hole well logs. Integration and calibration to
modern logs, cores, tests, and production data are stressed.
The best place to find By-Passed Pay is on older logs - find
out how to do it here.
Includes Russian Style Logs, still being run today in many parts
of the Former Soviet Union - essential for any operator planning
or evaluating joint venture projects in this part of the world.
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Basic tool
theory – ES logs (64"/16" normal),
laterologs, induction, SP, micrologs, sonic, density,
neutron, GR.
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Focusing,
or lack of it, on older log suites.
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Common
displays of older logs and how to identify each curve.
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How to
read older logs (e.g. bed boundaries, which log curve is
best to use).
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How do the
older measurements compare to current measurements, how have
these measurements evolved over time – direct comparisons.
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How much information can be read from older logs (porosity,
perm. hydrocarbon indicators, bypassed pay),
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Limitations, common pitfalls of older logs (borehole
condition. mud system, invasion, mud cake effects).
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Quality
control and troubleshooting on older logs.
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“Rule of Thumb” analysis techniques to help identify
hydrocarbons – carbonates and clastics..
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Using core data, local knowledge, modern logs in offset
wells to calibrate results.
COURSE
DURATION
1
day - 8 Professional Development Hours (PDH)
COURSE LEVEL
Beginner to Intermediate, calculator required.
AUDIO VISUAL SLIDE SHOW
AV-02: "Crain's Integrated
Petrophysics - Advanced Topics"
Audio Visual Narrated Slide Show on CD-ROM, for self study, can
be ordered separately,
Unlimited Worldwide Multi-Student
Corporate Licenses also available.
BENEFITS:
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understand what older logs really measured
understand uses and limitations of older logs
understand the rock/fluid model for log analysis
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provides
step-by-step procedures for analysis of older logs
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provides
"computer ready" mathematics
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gives
insight into rock quality versus well performance
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answer
oriented results, with quality control guidelines
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client
specific examples can be added
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permanent
reference material
SEMINAR
OUTLINE:
1 Ancient Logging Tools
Electrical Survey
Spontaneous Potential
Induction Logs
Laterologs
Micro Resistivity Logs
Sonic Logs
Density Logs
Neutron Logs
Gamma Ray Logs
Modern Resistivity Inversion Software
2 Shale Volume
3 Pore Volume
4 Porosity From The Neutron Log
5 Porosity from ES and Micrologs
6 Maximum Porosity Method
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7 Water Resistivity From Catalog or DST Recovery
8 Water Resistivity From Water Zone (R0 Method)
9 Water Resistivity From Spontaneous Potential
10 Water Saturation from Archie Method
11
Water Saturation from Simandoux Method
12 Water Saturation from Dual Water Method
13 Water Saturation From Buckles Number
14 Water Saturation and Porosity from Ratio Method
15 Irreducible Water Saturation
16 Permeability and Productivity
17 Permeability From Wyllie-Rose Method
18 Permeability From Porosity
19 Calibrating to Modern Logs and Core Data
20 Case Histories
ADDED Feature: Analyzing Russian Style Logs
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