---
id: resfo-utilities
version: "1.1.0"
license: LGPL-3.0-or-later
license_treatment: copyleft
maintenance: active
---

# resfo-utilities — A utility library for working with the output of reservoir simulators.

License: copyleft · Maintenance: active · Downloads: 102.8K/mo

## What it is and what it does

resfo-utilities is a Python library designed to work with output files from reservoir simulators, particularly opm-flow. It abstracts away the complexity of parsing and manipulating simulation results, allowing engineers and researchers to focus on analysis rather than file format handling. The package depends on numpy, scipy, natsort, and resfo for its core functionality.

The library is actively maintained (latest release 7 days ago) and supports modern Python versions from 3.11 through 3.14. It is distributed under LGPL-3.0-or-later, which means any modifications or derivative works must be shared under the same copyleft terms. The package carries medium install friction due to its compiled wheel distribution across multiple platforms and Python versions.

Use it for:

- Parse and load output files from opm-flow reservoir simulations for post-processing analysis.
- Extract specific data fields or time steps from simulator output for visualization or reporting.
- Automate workflows that depend on reading and transforming simulation results across multiple runs.
- Integrate reservoir simulation data into Python-based engineering pipelines or data analysis frameworks.

## Worth the install?

AI-flagged interpretation of the facts above — verify before relying.

resfo-utilities parses and processes output data from reservoir simulators like opm-flow, providing utilities to work with simulation results in Python.

Yes, if you work with opm-flow or similar reservoir simulator output and need Python-based utilities to parse and process results. The active maintenance, modern Python support, and lack of known vulnerabilities make it a safe choice. The LGPL-3.0-or-later license is acceptable for most open-source and research use; verify compatibility if your project has proprietary distribution requirements.

## Install

pip install resfo-utilities
uv add resfo-utilities
poetry add resfo-utilities

## Installing resfo-utilities

Before you install: Medium install friction due to compiled wheels for multiple Python versions (3.11–3.14) and platform combinations. Active maintenance with a release 7 days ago; repository is not archived and remains under active development.

License in practice: Licensed under LGPL-3.0-or-later (copyleft). Any derivative work or modification must be distributed under the same or compatible license; proprietary use requires careful review of your distribution model.

Quickstart:

pip install resfo-utilities

import resfo_utilities
# Process reservoir simulator output data

Requires Python 3.11 or later (supports up to 3.14); numpy, scipy, natsort, and resfo must be installed as runtime dependencies.

Verify before relying:

- What specific file formats or simulator output types are supported beyond opm-flow.
- API surface and core functions available in the public interface.
- Performance characteristics when processing large simulation datasets.

## Package facts

- License: LGPL-3.0-or-later (copyleft)
- Python support: supports_current
- Install friction: medium
- Maintenance: active
- Downloads: 102.8K/month (top 15,000 on PyPI)
- Known vulnerabilities: none known

## Tags

reservoir simulator output parsing, opm-flow data processing, simulation results analysis, reservoir engineering utilities, simulator output utilities, reservoir-simulation, scientific-computing

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