GHG Emissions Consulting



Different emission sources require different carbon-capture methods:

  • Ammonia, ethanol, natural gas processing: Emit gas streams with more than 80% CO2. The CO2 is captured with compression and dehydration, membranes, or physical solvents.
  • Chemical plants, iron, steel and paper mills: Emit gas streams with 15–80% CO2. The CO2 can be captured with physical solvents, solid sorbents, or membranes.
  • Coal and natural gas power plants and boilers: Emit gas streams with less than 15% CO2. The CO2 can be captured with chemical solvents.
  • Ambient air: Has a CO2 concentration around 0.041%. The CO2 can be captured with metal-organic frameworks or chemical systems.

Sources: Global CCS Institute, National Petroleum Council


Estimating Greenhouse Gas (GHG) Emissions from Petroleum Exploration and Production Operations, Midstream Operations, Oil & Gas Plant Operations, and Oil Refinery Operations, is a topic of growing interest to the oil & gas producing companies, midstream companies, oil & gas plant operations and oil refining companies, regulatory authorities, and investment organizations around the world.

The high-level and seasoned consultants of A&A Consulting Team, who have worked on major CO2 projects since the seventies, are available to estimate energy use and GHG emissions in your company’s conventional and unconventional oil & gas production operations, midstream operations, oil & gas plant operations, and oil refining operations.

A&A Consulting Team employs state-of-the-art software tools to estimate GHG emissions: 


Oil Production Greenhouse Gas Emissions Estimator (OPGEE)


Oil Production Greenhouse Gas Emissions Estimator (OPGEE), developed by Stanford University, is "an engineering based life cycle assessment (LCA) software tool that estimates greenhouse gas (GHG) emissions from the production, processing, and transport of crude petroleum. The system boundary of OPGEE extends from initial exploration to the refinery gate". 

Petroleum Refinery Life Cycle Inventory Model (PRELIM)


Petroleum Refinery Life Cycle Inventory Model (PRELIM), developed by the University of Calgary, is “a mass and energy-based process unit-level software tool for the estimation of energy use and greenhouse gas (GHG) emissions associated with processing a variety of crude oils within a range of configurations in a refinery”. 

Sustainable Energy System Analysis Modeling Environment (SESAME)


Sustainable Energy System Analysis Modeling Environment (SESAME), developed by MIT, is another software tool for modeling of emissions. “SESAME is a novel, system-scale energy analysis tool to assess the system-level greenhouse gas (GHG) emissions of today’s changing energy system. The underlying analytic tool constitutes more than a thousand individual energy pathways. SESAME, developed as a MATLAB application, provides a consistent platform to estimate life cycle GHG emissions of all stages of the energy sector. Furthermore, the system representation is embedded into the tool for power and transportation sectors”.


To put the high-level and seasoned consultants of A&A Consulting Team, subject matter experts (SME) in CO2 projects, to work on your company's challenging GHG emissions estimation projects, please contact us.  









Contact: +1-281-359-2674 or send us an e-mail

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