Dataset Standard and Format

Exploration Activities Map

Section 10 Notices

Tenders

Dataset Standards and Formats

Borehole Data Open or Close

1. The following categories of geological samples originating from offshore wells are available

for viewing, studying and analysis:

o Borehole Cores & samples
   - Cores
   - Micropal Unwashed Cuttings
   - Fine Reference Cuttings
   - Coarse Reference Cuttings
   - Washed Micropal Reference Cuttings
o Sidewall Cores
o Microscope Slides

Cores and geological samples originating from onshore boreholes are available from the

Council for Geosciences in Pretoria, South Africa.

2. Geophysical Logs are available in digital TIFF format for printing or in original DLIS-,

TLIS- LIS or LAS Format.

3. All well related reports can be supplied in digital TIFF or PDF format including related

diagrams that was generated at the time of drilling the well.

4. A Geological Well Completion Report normally contains a number of well related diagrams

including but not limited to:

4.1 A geophysical base log on scale of 1:500 (called a geological composite log). This log typically displays gamma ray, sonic interval velocity, deep and intermediate penetration resistivity, caliper, and in some cases self-potential logs as well as a lithological interpretation.

4.2 A litholog is based on the interpretation of borehole cores, side-wall cores and cuttings as well as dip meter and other geophysical logs, micropaleontology, petrography and geochemical data and reports. They attempt to integrate all relevant information to provide an optimal interpretation of sedimentological facies and depositional environments.

4.3 Synthetic Seismogram

4.4 Overpressure Detection Log
Seismic Data Open or Close

A map and listing of seismic lines can be supplied for each seismic survey in the area of interest.

Processed seismic data can be provided in digital TIFF format images and/or as digital processed SEGY format files for the majority of surveys.
Survey field data acquired in 1976 and later years are stored on digital tape in original acquired format (SEGA, SEGB, SEGC and SEGD format).

Navigation data in digital ASCII format can be supplied free of charge with the purchase of seismic lines.

Processed migrated seismic data are available in SEGY digital format for data processed from 1984 onwards. Some raw stack data are available for lines processed between 1981 and 1983.

Survey acquisition and processing reports are available and listed as Technical Reports.

Separate listings can be provided for:
seismic lines (per length), seismic images, processed seismic SEGY data and field data alternatively visit our GIS Web portal.
Gravity and Magnetic Data Open or Close
A list of available gravity and magnetic data can be provided on request including:
- Raw total magnetic field
- Leveled total magnetic field
- Reduced to pole total magnetic field (gridded)
Consolidated offshore gravity and magnetic data sets are available from Getech, UK – click here for more information.
Technical Reports Open or Close

All relevant technical reports that are available and categorized as follows:

1. Well Reports:
These are borehole specific reports that includes Recommendation Reports for wells that have not been drilled.
Technical reports also include the following:
Well Recommendation Reports
Well Completion Reports
- Engineering
- Mud Logging
- Geological
Geochemistry Data and Summary Reports
Petrography
Biostratigraphy
Core Analysis
Core Photographs (and Descriptions)
Special Core Analysis (Scal)
DST - Contractor's and SOEKOR's Interpretation
PVT
VSP
Block and Regional Reports

2. Regional Reports: The offshore area is divided into West, South and East Coast Regional Reports.
Blocks 1-6 West Coast
Blocks 7-14 South Coast
Blocks 15-18 East Coast
Seismic Acquisition Reports
Seismic Processing Reports

Reports dealing with two or more blocks are set out under the heading Regional Reports.

3. Offshore General Reports - reports dealing with more than one region or that are of general relevance to the offshore.

4. Onshore Technical Reports - reports are available for exploration activities being carried out in the late 1960’s to 1970’s in the Karoo, Zululand and Algoa basins.

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