eCalc™ is a software tool for calculation of energy demand and greenhouse gas emissions from oil and gas production and processing.

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eCalc is a software tool for calculation of energy demand and greenhouse gas (GHG) emissions from oil and gas production and processing.


eCalc is a work in progress and is by no means considered a finished and final product. We currently recommend to use the YAML API when using eCalc, and only fallback to the Python API when it is strictly needed, as a breaking v2 version of the Python API is in development and expected finished in 2023.


The quality of the results produced by eCalc is highly dependent on the quality of the input data. Further, we do not make any guarantees and are not liable for the quality of results when using eCalc.

eCalc Illustration

Reference Links


eCalc is a software tool for calculation of energy demand and GHG emissions from oil and gas production and processing. It enables the cross-disciplinary collaboration required to achieve high-quality and transparent energy and GHG emission prognosis and decision support.

eCalc performs energy and emission calculations by integrating data, knowledge and future plans from different disciplines. This could be production and injection profiles from the reservoir engineer, characteristics of energy consuming equipment units such as gas turbines, compressors and pumps from the facility engineer, and emission factors for different fuels from the sustainability engineer. The main idea is using physical or data-driven models to relate production rates and pressures to the required processing energy and resulting emissions. Integrated bookkeeping for all emission sources is offered.

eCalc uses a bottom-up approach to give high-quality installation and portfolio level forecasts at the same time as detailed insights about the energy drivers and processing capacities for the individual installation.

Getting started

eCalc is both a Python library and has a command line interface (CLI) to use with eCalc YAML Models. We currently recommend using eCalc from the command line with eCalc YAML Models, since the Python API is about to change soon, but the YAML will be more or less stable and backwards compatible.

To get started, please refer to the eCalc Docs - Getting Started, or follow the quick guide below:


  • Python, version 3.8 or higher
  • Java, version 8 or higher
  • Docker (Optional), Linux or MacOS

eCalc only supports Python 3, and will follow Komodo wrt. minimum requirement for Python, which currently is 3.8.


pip install libecalc
ecalc --version
ecalc selftest

Alternative using Docker:

docker build --target build -t ecalc .
docker run -it ecalc /bin/bash

Inside the docker container, run:

ecalc --version
ecalc selftest

Please refer to Docker Docs for details on how to use Docker.

Create and run your first model

Please refer to the on how to set up your own model with the YAML API and on how to run it.

See Examples below to use one of our predefined examples.

Development and Contribution

We welcome all kinds of contributions, including code, bug reports, issues, feature requests, and documentation. The preferred way of submitting a contribution is to either make an issue on GitHub or by forking the project on GitHub and making a pull request.

See Contribution Document on how to contribute.

See the Developer Guide for details.


Jupyter Notebook examples can be found in /examples. In order to run these examples, you need to install the optional dependencies.

pip install libecalc[notebooks]

In the examples you will find examples using both the YAML specifications and Python models. See /examples


The documentation can be found at

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