petekio 0.3.13

Subsurface data ingestion + structure layer: surfaces, wells, points, polygons — loading, interpolation, statistics.

petekIO

The subsurface data layer — a Rust library (with optional PyO3 bindings) that turns raw subsurface files into clean, validated, interpreted data: surfaces, wells (trajectories / tops / logs), points, and polygons, with loading, mnemonic and unit normalisation, validation, petrophysical interpretation, interpolation, and statistics.

The pipeline is the point:

ingest → normalize → validate → interpret → characterise

Documentation

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

• Library guide — the petekIO guide.
• Tutorials — Data ingest with petekIO · Well analysis.
• Notebooks — executed examples: ingest tour · well analysis.

Why build on it

Subsurface data is the unglamorous, error-prone groundwork under every reservoir application: vendor LAS mnemonics, mismatched units, out-of-range samples, cutoffs, gridding that has to honour its control points, uncertainty. petekIO does that work once and behind a stable API, so the application on top stays thin and stays in its own domain:

• The whole path, not just parsing. Files in; normalized, validated, interpreted domain objects out — no re-implementing LAS aliasing, unit harmonisation, petrophysical cutoffs (net pay included), or surface gridding/resampling further up the stack.
• Values know what they are. Results come back in canonical units, each carrying an uncertainty distribution and a provenance flag (measured / interpolated / defaulted) — so downstream code propagates uncertainty rather than re-deriving it.
• A substrate, not a grab-bag. Load a project once into a GeoData and operations broadcast across the whole collection. Immutable, strictly layered, fluent.
• Rust core, thin Python. Fast and embeddable, with PyO3 bindings that mirror the Rust API.

Install

Rust:

[dependencies]
petekio = "0.3"

Python (PyO3 wheel):

pip install petekio

Quickstart (Python)

Import raw source data once, then read interpreted results — no parsing or interpolation in your own code. Save/load is reserved for compact .pproj projects:

import petekio

project = petekio.Project.import_data(
    "Data",
    settings=petekio.ImportSettings(
        crs="EPSG:32631",
        aliases={"por": ["PHIE", "PORO"]},
    ),
)
project.inventory()
geo = project.geodata
project.rename_surface("Top reservoir", "structure/top dome")
project.surfaces.structure.top_dome
project.save("field.pproj")
project = petekio.Project.load("field.pproj")

# Or build the same substrate manually:
geo = petekio.GeoData(unit="m")

# A surface (IRAP classic) — sample, stats, volumetrics, resample.
top = geo.load_surface("top_res", "surfaces/top_res.irap")
top.stats.mean
top.area_below(2400)
top.dip_angle()                         # world-frame dip, degrees
top.extrapolate("nearest")              # fill NaN holes; IDW/min-curvature too

# A multi-bore well: a Petrel export tree (one bore per .wellpath) + logs.
# head/kb are optional — the .wellpath header fills them.
geo.load_well("15/9-A1", files="wells/15_9-A1/")
geo.load_well_tops("WellTops.tops")        # Horizon picks → matching well + bore

w = geo.well("15/9-A1")
w.bores()                                  # e.g. ["", "A", "B", "ST2"]
bore = w.sidetrack("A")
bore.log_stats("PHIE").mean                # whole-bore curve stats

# Per-zone stats, returned in lithostratigraphic order:
bore.zone_stats("PHIE")                    # [(zone, Stats), ...]
bore.zone_stats("PHIE", "Top A").mean      # one zone directly (None if absent)
geo.strat_order                            # the field's lithostratigraphic column

# A tidy per-zone×bore table (pandas; pip install petekio[pandas]):
w.zone_table("PHIE", stats=("mean", "p50"))  # DataFrame, zone in lithostrat order

Lithostratigraphic ordering

Zones come back in true stratigraphic order, not just measured-depth order. load_well_tops reads every well in the tops file and merges their relative orderings into one field-wide column — so a marker that pinches out (zero thickness) in one well is ordered correctly by a well that develops it. Geometry is untouched; only the order zones are presented in follows the column.

Capabilities

Domain	What you get
Surfaces	IRAP-classic load, sample/resample, typed attribute lanes, arithmetic, smoothing, dip angle/azimuth, NaN-hole extrapolation, edge polygons, stats/volumetrics, and gridding from scattered points
Wells	Positioned .wellpath trajectories (MD preserved; minimum-curvature interpolation), multi-bore (sidetracks), imported logs stored as MD/value pairs with mnemonic aliasing, Petrel well-tops, per-zone stats, field-wide lithostratigraphic ordering
Points / polygons	IRAP / GeoJSON / CSV load, strict regular-grid geometry inference, clip, point-to-surface gridding
Project	GeoData substrate — import raw data once, broadcast across the collection; views are read-only filtered subsets; compact .pproj load/save

Built in gates

petekIO grows in gated phases against a locked contract: every public signature is specified in API.md (a change needs sign-off), and the design + build roadmap live in SPEC.md.

Status: early development. The public API is locked and the core data path (ingest → normalize → validate → interpret → characterise) is in place; surfaces, multi-bore wells (trajectories / tops / logs), per-zone stats, and lithostratigraphic ordering are landed. Breadth is still filling in — more ingest formats, fluid contacts, richer interpretation.

Documentation

• API.md — the locked public API contract (Rust, mirrored in Python).
• SPEC.md — design constitution + architecture.
• Guides + API reference: the docs/ site (MkDocs Material; published on Read the Docs).

Design at a glance

• Strictly layered, one-way deps: foundation → algorithms → io → core → analysis → manager → py.
• A manager substrate (GeoData): load once, operations broadcast across the collection — no per-item loops.
• Domain objects carry their operations (arithmetic, filters, interpolation, stats) and expose history() for generated objects — fluent and chainable; immutable (ops return new objects).
• Algorithms are isolated, QC-able kernels grouped by discipline (e.g. the minimum-curvature survey, the cross-well stratigraphic merge) — pure and type-light.
• Rust core + thin PyO3; the Python API mirrors the Rust API.

Built on

• petekTools — standalone numerics / geostatistics kernels (gridding, interpolation) that petekIO builds on.

License

Apache-2.0 — see LICENSE and NOTICE.