South African Geophysical Association
presents
WIRELINE WORKSHOP
6
th
& 7th NOVEMBER 2008 – 2 full days
CSIR, Auckland Park, Johannesburg
Course Instructor: Marcus Chatfield (Wireline Workshop)
Course description
Borehole wireline geophysical logging refers to the in situ measurement of physical properties of
the geological formations intersected by the borehole. The data is digital and calibrated, hence
the dataset is objective and processing can be automated for quick turnaround. High-resolution
sampling (cm range) and unbiased, continuous coverage of the formations intersected by the
borehole provide a true spatial dataset for modeling. Such data has useful input in all spheres of
the mining industry, e.g.



In mineral exploration, characterization of the in situ physical signatures of a known orebody
provides necessary information for selecting and designing appropriate exploration strategies
in the search for new orebodies in the region and / or extensions to existing orebodies.
In orebody evaluation, changes in physical characteristics can be related to changes in grade
and / or metallurgical parameters or indicate the presence of country rock diluting the ore.
In mining, geophysical logs provide oriented structural and geotechnical information for mine
planning and safety as well as objective mapping of formation parameters for continued
orebody evaluation programs and / or grade control.
Despite this, wireline geophysical logging, with some notable exceptions, is not routinely
employed in exploration programs and on mines. In part, this may be due to lack of knowledge of
the techniques available. Poor results can often be traced to inappropriate selection of survey
tools. This course presents an overview of the suite of tools and techniques available to the
minerals mining (hard rock and coal) industry – slimline logging. Each tool is described along with
the advantages and limitations of the measurement. Data examples are presented to illustrate
the unique value of each tool to mapping different rock mass characteristics. Management of risk
in the downhole environment, e.g. the use of nuclear measurement techniques is also presented.
Course Outline
WIRELINE LOGGING SEMINAR (2 DAYS) - SAGA - CSIR auditorium (6-7 November2008)
THURSDAY
08:00
WELCOME TEA BREAK
08:45
1.
WIRELINE LOGGING INTRODUCTION / EMPIRICISM/ GENERAL QA / DEPTH MEASUREMENT
09:30
2.
THE BOREHOLE ENVIRONMENT / BOREHOLE DEVIATION / PLANNING FOR RISK
10:30
TEA BREAK
11:00
3.
LOGGING TOOLS / BASIC MEASUREMENT TYPES
11:30
4.
FIRST RUNS – CALIPER / GAMMA RAY / TEMPERATURE / CONDUCTIVITY
12:00
5.
SPECTRAL GAMMA RAY / URANIUM LOGGING
13:00
LUNCH
14:00
6.
GAMMA-GAMMA / DENSITY LOGS / PE DENSITY / COMBINATION TOOLS
15:00
7.
RADIATION SAFETY / EXPOSURE / CONTAMINATION
15:30
TEA BREAK
16:00
8.
NEUTRON LOGS
16:30
9.
COAL LITHOLOGY LOGGING / POROSITY / COAL BED METHANE
17:00
FINISH SESSION
17:00
Drinks & Snacks in Lapa at CSIR
FRIDAY
08:00
BREAKFAST
08:45
10. REVIEW / CONTEXT OF LITHOLOGY LOGS DENSITY, NEUTRON AND GAMMA RAY
09:00
11. SONIC LOGS / SONIC POROSITY / FULL WAVEFORM SONIC / LOG EXAMPLES
10:00
12. ACOUSTIC TELEVIEWER
10:30
TEA BREAK
11:00
13. TELEVIEWER LOGS / GEOTECHNICAL APPLICATIONS / FLOWMETERS / THE BUSHVELD
12:00
14. RESISTIVITY / SP / MICRO RESISTIVITY
12:30
15. DIPMETER / DATA PROCESSING / STRUCTURE LOGS
13:00
LUNCH
14:00
16. OPTICAL TELEVIEWER / STRUCTURE LOGS
14:30
17. HARD ROCK LOGGING
15:00
18. MAG SUSCEPTIBILITY / IP / INDUCTIVE CONDUCTIVITY
15:30
TEA BREAK
16:00
19. IRON ORE LOGGING
16:30
20. LOG EXAMPLES
1700
SEMINAR ENDS – Drinks and Snacks in Lapa
Course Fees
Fees include: Materials, tea and coffee breaks, lunches on both days, equipment demonstrations.
SAGA / GSSA or affiliated societies
R2 500.00
Non society member
R3 000.00
Full time students
R1 500.00
Course Secretariat
Jann @ RCA
P O BOX 72147 Parkview 2122
Tel +27 11 728 8173 Fax +27 11 728 1675
events@rca.co.za
www.sagaonline.co.za or www.rca.co.za
Please note there are a limited number of delegates that can be
accommodated. Registration will be first come, first served.