Development of geochemical approaches to monitor the fate, transport, and retention of CO2 in steam-assisted gravity drainage reservoirs in the Canadian oil sands

森科尔能源公司是使用蒸汽辅助重力排水(SAGD)技术从加拿大油砂中回收沥青的全球领先企业。注蒸汽技术是从沥青中提取石油的有效技术；然而，该过程是能源密集型的，因为相对较高的汽油比(SOR)在阿萨巴斯卡油砂中仍然被认为是非常好的(低于3立方米/立方米)。减少或减少温室气体排放的技术进步将显著节省石油开采成本，减少能源使用，并减少温室气体排放。关于二氧化碳对沥青回收的影响，现有的信息有限。二氧化碳浓度受到SAGD过程中自然产生的二氧化碳的影响。多个二氧化碳来源使二氧化碳在SAGD水库中的去向、传输和滞留的量化和识别变得复杂。该提案旨在开发地球化学技术，以更全面地了解二氧化碳在水库中的体积和迁移路径，这是准确评估二氧化碳对沥青回收、能源使用和温室气体排放的影响所需的关键参数。

Suncor Energy is a global leader in the recovery of bitumen from the Canadian oil sands using Steam AssistedGravity Drainage (SAGD) technology. Steam injection techniques are effective for oil extraction from bitumen;however, the process is energy intensive as relatively high steam to oil ratios (SOR) are still regarded as verygood in the Athabasca oil sands (less than 3 m3/m3). Technological advancements that decrease SOR wouldlead to significant cost savings in oil recovery, reductions in energy use, and decreases in greenhouse gasemissions (GHGs). Limited information is available on the impacts of CO2 on bitumen recovery. CO2concentrations are impacted by natural production of CO2 as a result of the SAGD process. Multiple CO2sources complicate the quantification and identification of the fate, transport, and retention of CO2 in a SAGDreservoir. The proposal seeks to develop geochemical techniques to achieve a more complete understanding ofthe volumes and migration pathways of CO2 in the reservoir, a key parameter needed to accurately assess theimpacts of CO2 on bitumen recovery, energy use, and GHG emissions.