GUIDE

How to digitize a scanned well log and export LAS

For scanned paper logs, PDFs, TIFF, PNG, JPEG and WebP images · runs in your browser

In short

Open the scan, enter two known depths, set each curve's left and right scale values, then trace the curve.
Export the traced curves as LAS 2.0, LAS 3.0 or CSV at the depth interval you choose.
Your scan and data stay on your computer; nothing needs to be installed.

1. Open the scan

Open a PDF, TIFF, PNG, JPEG or WebP image of the log in the workspace. You can also try the built-in sample log first to learn the tools.

2. Calibrate the depth

Enter two known depths from the depth scale and pick their horizontal marks on the scan. Choose feet or metres. Depth ties and breaks are available in the advanced tools.

3. Calibrate each curve

Add a curve, enter its left and right track values, pick the track edges on the scan and choose a linear or logarithmic scale. Resistivity curves commonly use a logarithmic scale. A backup scale can be used where a curve wraps around the track.

4. Trace the curve

Use the pen to click anchors or draw a smooth stroke along the printed curve, or right-click the curve for automatic tracing. You can trace downward or upward, move or delete anchors, and undo. A new pen stroke replaces only its own depth span.

5. Review before you export

Use the data checks to look for values outside the printed scale, spikes and gaps, and review hints for crossings, faded ink and grid lines. Corrections change only the section you select.

6. Export LAS, CSV or Excel

Tick the curves you need, choose the sampling interval and export LAS 2.0, LAS 3.0 or CSV. Excel and text are in the advanced tools. Exports interpolate between traced points and leave untraced depths as null (−999.25). See LAS 3.0 and LAS 2.0 in Log Digitize for what each version contains.

7. Plot and correlate

Send the digitized curves to LogPlot Studio to plot them next to LAS or Excel data, build custom tracks, pick formation tops and correlate wells in a correlation chart.

Common questions

Do I need to install anything?

No. Log Digitize runs in your browser.

Where are my logs stored?

On your computer. Projects are saved in a folder you choose or as files you download.

Which scan formats work?

PDF, TIFF, PNG, JPEG and WebP. LAS, Excel, CSV, TSV and text data can be opened in LogPlot Studio without digitizing.