LAS viewer — g-Viewer
Well logs

LAS viewer

Well logs, one well or many.

g-Viewer opens LAS well logs next to your seismic — header and curve tables, a log view with curve tracks, multi-well correlation, the location map and export to LAS and Excel. Desktop software for Windows, Linux and macOS on Apple Silicon, with a 30-day full trial and a free version renewed annually.

Download free LAS versions Views & export
LAS 1.2 · 2.0
Wrapped & unwrapped
Multi-well
Correlation view
3 OS
Windows · Linux · macOS
g-Viewer LAS mode: the LAS files list with seven wells, File info and LAS header for well FLUOR 22 "X" #2-10, its LAS log view with NPHI, GRD, CALD, CORR, RHOB and TENR tracks, the LAS correlation view with four wells side by side, and the Location Map
g-Viewer LAS mode: the LAS files list, File info and LAS header panels for well 17-WX-21, the LAS log view with CALD, DT, GR, ILD, ILM, NPHI and RHOZ curve tracks, and the Location Map with the selected well
In view
LAS log view, correlation view and location map
g-Viewer is a LAS viewer for well logs. It reads LAS 1.2 and 2.0 files, wrapped or unwrapped, and runs on Windows, Linux and macOS on Apple Silicon. Geoscientists can check a well's header and curves, correlate several wells side by side and export the logs, without opening an interpretation package. For seismic, see the SEG-Y viewer and the SEG-D viewer.
Supported LAS

LAS 1.2 and 2.0, wrapped or unwrapped.

Load .las files with Load LAS files, by drag and drop, or with the Log loading wizard for full control. For files older than 2.0 the well name and UWI come from the description field, as LAS 1.2 requires. Reference: g-Viewer formats.

g-Viewer LAS mode: the LAS files list with seven wells, File info and LAS header for well FLUOR 22 "X" #2-10, its LAS log view with NPHI, GRD, CALD, CORR, RHOB and TENR tracks, the LAS correlation view with four wells side by side, and the Location Map
In viewSeven wells loaded: one in the log view, four side by side in the correlation view, and the Location Map
Read & write
LAS versions
LAS 1.2LAS 2.0WrappedUnwrapped
Export
LAS 2.0Excel (.xlsx)Resampled LAS 2.0Well headers (TSV)
Per well
File info, header and curves
File info
Well, UWI, X, Y, KB, TD, start / stop, step, curves, null value.
Header
The Well, Parameter and Curve sections with mnemonic, units, value and description.
Curves
Curve, units, type and range; hide a curve from the views.
Wells
Files grouped into wells by UWI, API, well name or file name.
Views & export

One well or many.

Logs are shown in their own views; wells also appear in the 3D view with the seismic, coloured or sized by a curve and placed in time with a depth-to-time velocity. Logs are not drawn on top of a 2D seismic section. Step by step in the manual: LAS well log viewing.

View
LAS log view

The tracks and curves of the selected well, with depth on hover and display settings per view.

Correlate
Wells side by side

Several wells in the correlation view, optionally spaced by their real distance, or one curve compared across all loaded wells.

Organise
Templates, colours, map

Templates for both views and one colour per curve name everywhere. Import well coordinates from CSV, edit a well's X/Y and show it on the Location Map.

Export
LAS, Excel, resampled

Write logs as LAS 2.0 or Excel, one file per well; resample a well to one depth step; export the well headers to TSV.

Free & licensed

Start free. Add the LAS licence when you need it.

Free version
Free licence, renewed annually
Opens
LAS files, as well as SEG-Y.
Limits
Only the first file in each list can be viewed; no projects; an advertisement is shown.
Unavailable
Projects, and viewing any LAS file beyond the first in the list.
LAS licence
One licence per file type
Keys
SEG-Y, SEG-D and LAS each have their own licence key.
Unlocks
The full LAS feature set: every file in the list, and projects.
Trial
Every download starts with 30 days of full functionality, SEG-D and LAS included.
Pricing
$300 per year, or $500 per year for SEG-Y, SEG-D and LAS together — see g-Viewer pricing.
Platforms

Windows, Linux and macOS.

The same LAS viewer on all three desktop systems, kept current by auto-update: g-Viewer checks for a newer version daily at start-up, and Help → Check for updates asks on demand.

—
Windows
Windows 11 and higher, 64-bit.
—
Linux
RHEL 8 to 10.
—
macOS
macOS 26 and higher on Apple Silicon (ARM).
More g-Viewer capabilities

What else g-Viewer does.

SEG-Y viewer overview SEG-D viewer Seismic data view 3D view Multiple datasets Pre-stack QC Location map
FAQ

Questions, answered.

What is the g-Viewer LAS viewer?
g-Viewer is Geomage's desktop viewer for seismic and well data. For LAS well logs it shows each file's header and curves, draws the curves in tracks, compares several wells side by side and exports the logs. It runs on Windows, Linux and macOS on Apple Silicon, and a free version is available, renewed annually.
Which LAS versions does g-Viewer read?
LAS 1.2 and LAS 2.0, in both wrapped and unwrapped form. For files older than 2.0, the well name and UWI are taken from the description field, as LAS 1.2 requires. LAS export is written as LAS 2.0. LAS 3.0 is not supported.
Can I compare several wells?
Yes. Add wells to the LAS correlation view to see them side by side, optionally spaced by their real distance once they have coordinates, or switch the log mode to Curves to compare one curve across all loaded wells. A layout can be saved as a template.
Can I display well logs on a seismic section?
No. Wells from LAS files are shown on the location map and in the 3D view, where a well can be coloured or sized by one of its curves and placed in time with a depth-to-time velocity. Logs are not drawn on top of a 2D seismic section.
What export formats are available for LAS?
LAS 2.0, Excel (.xlsx) and resampled LAS 2.0 at one depth step, one file per well, plus the well headers to a TSV or text file. Well headers such as UWI, X and Y can also be imported from a text or CSV file.
Is the LAS viewer free?
Every download starts with a 30-day full-functionality trial. After it, the free version opens LAS files under a free licence renewed annually, but shows only the first file in each list and has no projects. A LAS licence unlocks the full LAS feature set; SEG-Y and SEG-D have licences of their own.
Does g-Viewer run on Mac and Linux?
Yes. g-Viewer runs on Windows 11 and higher (64-bit), on Linux (RHEL 8 to 10) and on macOS 26 and higher on Apple Silicon (ARM). The installer for your system is picked automatically on the download page.
Get started free

Your well logs, on screen in minutes.

g-Viewer for Windows, Linux and macOS on Apple Silicon — a 30-day full trial, then free single-file viewing, with auto-update.

Download free Talk to Geomage