Julius Bacani

Carbon Capture and Storage (CCS) is an important decarbonisation technology that plays a major role in meeting Greenhouse Gas (GHG) reduction targets in the oil and gas industry. QatarEnergy LNG has implemented the first CCS project of its kind in Qatar by converting its acid gas injection system, operational since 2005, into a dedicated CO₂ injection facility in 2019 with a design injection capacity of 2.2 million tonnes per annum (MTPA). This abstract presents the journey, results, and learnings from this landmark environmental project representing one of the largest and most impactful carbon mitigation efforts in the region. The CO₂ utilised by QatarEnergy LNG’s CCS facility is separated from natural gas as part of LNG production. It is then compressed and transported to a deep geological formation for injection and permanent storage. The facility is integrated within QatarEnergy LNG’s gas processing infrastructure, and as of the end of 2024, it has successfully sequestered approximately 7.5 MTPA of CO₂ with the equivalent environmental impact of powering 260,000 homes or removing 120,000 gasoline-powered vehicles from the road on an annual basis. The CCS project has delivered strong technical performance across key injection parameters, including stable pressure, high injectivity index, and no containment breaches over a multi-year period. Data from 2019 to 2024 illustrates a consistent and safe CO₂ storage profile, verified by pressure sensors and subsurface modeling. Key lessons emerged from the project included early-stage integration of stakeholders across engineering, operations, and environmental domains, robust monitoring technologies and subsurface analysis and alignment with Qatar’s National Vision 2030 elevated the strategic significance of the project beyond emissions abatement. In conclusion, QatarEnergy LNG’s CO2 injection facility serves as a benchmark for successful CCS implementation in the region. Its evolution from an acid gas injection system to a dedicated CO2 storage facility exemplifies effective adaptation to emerging environmental imperatives. The insights garnered from this case study aim to inform and guide decarbonisation initiatives within the energy sector while providing a model for LNG operators worldwide to embed CCS at scale using existing infrastructure to ensure measurable and verifiable GHG reductions.