seisvtk

Server-side 3D seismic cross-section viewer (trame + VTK) with a lightweight, VTK-free I/O core. The viewer renders inline / crossline / Z slices of a cube and streams the rendered frames to the browser, so the client stays thin and the cube is read out-of-core — only the chunks a visible slice touches are loaded, from local disk or straight from object storage (s3://). Wells (including deviated) and horizons drape on the same grid.

Install

pip install seisvtk            # I/O core: SEG-Y -> Zarr, wells, horizons, geometry
pip install "seisvtk[viz]"     # + the trame/VTK viewer
pip install "seisvtk[s3]"      # + read cubes directly from s3://

The core has no VTK dependency, so a data producer (e.g. a pipeline step that only converts SEG-Y and writes overlays) installs just seisvtk. For a headless / CPU render host, install the vtk-osmesa wheel in place of vtk (see docker/Dockerfile).

Use

Serve a single cube:

python -m seisvtk.viz.app path/to/cube.zarr --mode property --port 8910

Serve a scene manifest (a cube plus well/horizon overlays — s3:// cubes work):

seisvtk-viewer scene.json --port 8910

Convert a SEG-Y to a chunked Zarr from Python:

from seisvtk.io.loaders import convert_segy
convert_segy("survey.segy", "survey.zarr")   # geometry auto-detected from headers

What's in the box

• I/O (seisvtk.io, no VTK): streaming SEG-Y→Zarr conversion with survey-geometry recovery; an out-of-core Volume reader (local or s3://); readers for wells (LAS/CSV, deviation surveys, checkshots), horizons, and the survey affine (GridTransform).
• Viewer (seisvtk.viz): a trame app streaming inline/crossline/Z slice planes, well tubes coloured by a log, and horizon surfaces; amplitude and property colormaps; vertical exaggeration; runtime cube swap.

License

MIT © 2026 Aashrit