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The Division of Geological Survey has released a major oil-and-gas dataset comprised of digital images of geophysical logs, some dating back to 1947, for nearly 69,000 wells throughout the state. All 126,000 geophysical logs residing in the Division’s archives are now available to the public. These logs are a fundamental dataset used by industry for oil and gas exploration, by government agencies for environmental restoration and remediation, and by academic institutions for research.
Raster Format
Raster-format digital logs simply are scanned images of the logs saved in TIF format. Features include:
- Use with software applications for automatic or semiautomatic creation of cross-sections and other custom displays.
- Large file size—500 KB for a shallow well up to 80 MB for a deep well with color.
- Image quality depends on quality of original image. (E.g., if paper copy of log is dark, washed out, or smudged, these same deficiencies will be evident in the digital image.)
Click here to access lists of available digital logs, log abbreviations, logging company abbreviations, and an explanation of scanning procedure. Use these materials to choose which digital logs you would like to order.
Geophysical Log Pricing
| Digital files on CD-ROM |
$2.00 per log; $25 minimum order |
Paper prints of
scanned logs |
$4.00 for entire well with TD of <4,000 ft. |
| $6.00 for entire well with TD of 4,000–6,000 ft. |
| $8.00 for entire well with TD of >6,000 ft. |
The Division of Geological Survey actively seeks out geophysical logs to help build its archives. Click here to learn about donating oil and gas logs.
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