neqsim-reservoir-3d-visualisation

Reservoir 3D Visualisation

A reservoir figure is evidence, not decoration. A sweep claim, a bypassed-oil claim, or a "the property field looks reasonable" claim is far easier to check in a picture than in a table — and far easier to get silently wrong.

This skill renders a simulation grid from the simulator's own output files, so the picture shows what the simulator actually used rather than what the build script intended.

When to Use

• An OPM Flow or Eclipse run needs a 3D figure for a report or decision gate.
• A sweep, channelling or bypassed-oil statement needs visual support.
• A generated property field must be inspected before it is trusted.
• A model's layering, well placement or grid extent must be shown to a reviewer.

Do not use it to measure anything. Read numbers from the summary vectors; use the picture to show where they came from.

Inputs

Group	Fields
Geometry	CASE.EGRID (cell-corner geometry, valid for box or corner-point grids)
Static properties	CASE.INIT (e.g. PERMX, PORO, SATNUM)
Dynamic properties	CASE.UNRST (e.g. SWAT, PRESSURE, SGAS) — requires RPTRST BASIC=2 in the deck
Wells	Well trajectories/completions from the grid or a separate well-track source
Presentation choices	Vertical exaggeration factor VE, colour-map range clim, crinkle-cut plane, threshold value

All inputs are the simulator's own output files — never hand-built geometry — so the picture matches what the simulator actually solved.

Outputs

• A full-block static-property render (extent, layering, well placement).
• A crinkle cutaway exposing vertical heterogeneity.
• A threshold view isolating cells above/below a dynamic-property cutoff (e.g. remaining oil).
• An optional exploded-layer view.
• Each figure's caption states the vertical-exaggeration factor and the clim range used, per neqsim-professional-reporting conventions.

Engineering Method

1. Read cell-corner geometry from the EGRID (never rebuild from DXV/DYV/DZV) and permute Eclipse corner ordering to VTK hexahedron ordering.
2. Negate depth to elevation and apply the stated vertical exaggeration.
3. Re-centre the mesh on the origin before framing the camera.
4. Attach static (INIT) and dynamic (UNRST, last report step) property arrays as cell data.
5. Render the full block, a crinkle cutaway, and a threshold view, each with an explicit clim.
6. Interpret only location claims from the figure (sweep, channelling, bypassed-oil shape); take magnitudes from the summary vectors.