petekStatic

GEOMODEL layer of the petek subsurface-modelling ecosystem — a Rust library that turns model-ready inputs into a populated StaticModel and owns the static-uncertainty stack over it:

• Structural framework — horizons + zones (+ faults, planned).
• Grid construction — the convergent corner-point grid the properties live on.
• Property modelling — priors, property formulas, log upscaling, and the first PropertyPipeline lowering path; facies/geostatistics grow from there.
• Volumetrics + static uncertainty — GRV / in-place (OOIP/OGIP) off the model itself, and Monte-Carlo regeneration over static-model realizations (StaticModelTemplate::realize(&RealizationDraw)).

→ a populated StaticModel with its own volumes/P-curve surface, which petekSim (dynamic/engineering simulation + the Python product facade) consumes across the seam.

Documentation

The canonical docs for the whole petek family live on the petekSuite site — petekStatic's pages there:

• Library guide — the petekStatic guide.
• Tutorial — Static model build (flagship).
• Notebooks — executed examples: stack model from scatter · volumes & bundles.

Where it sits (deps flow one way, downward)

petekIO      DATA       → model-ready inputs (ModelInputs / .pproj)      [upstream]
   ↓
petekStatic  GEOMODEL   → populated StaticModel + volumetrics/uncertainty [here]
   ↓
petekSim     SIMULATION → dynamic/engineering + the Python product        [downstream]

petekTools   TOOLKIT    → gridding/kriging/warm-start kernels + units + pproj  [horizontal]

Python workflow facade

petekStatic now owns the first Python slice of the canonical static workflow. The facade is deliberately small: declare the grid, assign properties, calculate formulas through petekTools, and run deterministic smoke volumes.

import petekstatic as pst

grid = (
    pst.Grid.from_project(project)
    .geometry(cell=(50.0, 50.0), orient=0.0, outline="ModelEdge")
    .horizons(
        [
            {
                "name": "Top reservoir",
                "surface": "Top reservoir input surface",
                "well top": "well tops/Top reservoir",
                "zone": {
                    "name": "Reservoir",
                    "sub-zones": [
                        {"zone": "Top Reservoir", "type": "constant"},
                        {"name": "Intra Shale", "well top": "Top Lower Reservoir"},
                        {"name": "Lower Reservoir", "type": "isochore"},
                    ],
                },
            },
            "Base reservoir",
            {"name": "Custom model horizon name", "surface": "input surface"},
        ],
        well_tie={"influence_radius": 800},
    )
    .layers({"Top Reservoir": pst.Layering(n=2), "Lower Reservoir": pst.Layering(n=2)})
)

p = grid.properties
p.ntg = 0.80                         # scalar assignment broadcasts to the grid
p.por = p.ntg * 0.85                 # assignment expression via petekTools
p.sw = 0.20
p["PermXY_BC"].set(100.0)
p["PorE_BC"].set(0.25)
p.calc(["RQI = $lambda * sqrt(PermXY_BC / PorE_BC)"], params={"lambda": 0.0314})

result = grid.volumes(ntg="NTG", por="POR", sw="Sw", fluid="oil", fvf=1.30).run(progress=True)

Property recipes use the same facade and lower to the Rust PropertyPipeline shape:

logs = project.logs
vgm = pst.Var("spherical", major=1500, minor=700, vertical=20, azimuth=35)

p.por = pst.upscale(logs.PHIE(logs.NetSand > 0.50)).sgs(
    variogram=vgm,
    distribution=pst.distributions.from_logs(),
    seed=12,
)

spec = p.pipelines("por")            # serialization-ready PropertyPipelineSpec

If the project or source resolves positioned wells, p.execute_pipeline("por") returns a Rust-backed pst.PropertyPipeline handle:

iso = pst.Var("spherical", major=1500, minor=1500, vertical=1500, azimuth=0)
p.ntg = pst.upscale(logs.NetSand).sgs(
    variogram=iso,
    distribution=pst.distributions.from_logs(),
    seed=11,
)
pipe = p.execute_pipeline("ntg")
smoke_model = pipe.apply_to_flat_model()

Applying that handle to an arbitrary production grid is not exposed yet; PropertyPipeline.apply_to_flat_model(...) is the current smoke execution path. Lazy logs, cokriging/trend binding, non-from_logs distributions, and anisotropic Rust execution are guarded explicitly. Anisotropic pst.Var(...) specs are still preserved and can be lowered to the petekTools anisotropic variogram object.

Status — built and green

A single crate, petekstatic (0.1.12), whose modules preserve the historical layer boundaries and one-directional imports: petekstatic::{error, wireframe, grid, petro, gridder, volumetrics, uncertainty, data, spill, model} — with the top-of-DAG model surface (the StaticModel aggregate + the ratified MC-regeneration seam) re-exported at the crate root. Consolidated from the former ten-crate workspace on 2026-07-05 (owner ruling; the former srs-* and petekstatic-error package names are retired). The volumetrics/uncertainty code relocated here from petekSim on 2026-07-03 (the layer-charter re-scope). Design constitution: SPEC.md; public contract: API.md. Agents, actions, GitHub Actions, and releases are managed centrally from petekSuite.

Licensing

petekStatic is licensed under the Business Source License 1.1 — see LICENSE. Non-production use is freely granted; production use is permitted by the Additional Use Grant except as a competing commercial "as-a-service" offering of the Licensed Work's functionality. Each released version converts to the Change License (Apache-2.0) four years after its first publication. For alternative licensing, contact kkollsg@gmail.com. (The {VERSION} / Change Date parameters are filled in at each release cut.)