page_title: Carbon capture and storage
section_title: In Salah CO2 injection – Algeria
hierarchical_section_title: Carbon capture and storage / Example CCS projects / Industrial-scale projects / In Salah CO2 injection – Algeria
caption_attribution_description: English: NET Power oxy-combustion natural gas facility
context_page_description: Carbon capture and storage, or carbon capture and sequestration and carbon control and sequestration, is the process of capturing waste carbon dioxide usually from large point sources, such as a cement factory or biomass power plant, transporting it to a storage site, and depositing it where it will not enter the atmosphere, normally an underground geological formation. The aim is to prevent the release of large quantities of CO
  2 into the atmosphere from heavy industry. It is a potential means of mitigating the contribution to global warming and ocean acidification of carbon dioxide emissions from industry and heating. Although CO
  2 has been injected into geological formations for several decades for various purposes, including enhanced oil recovery, the long-term storage of CO
  2 is a relatively new concept. Direct air capture is a type of CCS which scrubs CO
  2 from ambient air rather than a point source.
  Carbon dioxide can be captured directly from the air or from an industrial source using a variety of technologies, including absorption, adsorption, chemical looping, membrane gas separation or gas hydrate technologies.
context_section_description: In Salah was a fully operational onshore gas field with CO₂ injection. CO₂ was separated from produced gas and reinjected into the Krechba geologic formation at a depth of 1,900m. Since 2004, about 3.8 Mt of CO₂ has been captured during natural gas extraction and stored. Injection was suspended in June 2011 due to concerns about the integrity of the seal, fractures and leakage into the caprock, and movement of CO₂ outside of the Krechba hydrocarbon lease. This project is notable for its pioneering in the use of Monitoring, Modeling, and Verification (MMV) approaches.
caption: NET Power Facility. La Porte, Tx
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