Development of alkane solvents enhanced steam + flue gas processes for enhancing heavy oil recovery from post-CHOPS reservoirs

开发烷烃溶剂增强蒸汽烟气工艺，以提高 CHOPS 后油藏的重油采收率

• 批准号: 514877-2017
• 负责人: Yang, Daoyong
• 金额: $ 17.24万
• 依托单位: University of Regina
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=696883
• 关键词: Development; alkane; solvents; enhanced; steam

As for the enormous heavy oil reserves deposited in Western Canada, the most common production process is the cold heavy oil production with sand (CHOPS) which can typically recover only 5-15% of original-oil-in- place due to both wormhole generation and foamy oil flow. As such, efficient follow-up enhanced oil recovery (EOR) techniques are required in these post-CHOPS reservoirs where both conventional steam-based thermal recovery techniques and solvent-based non-thermal recovery techniques find their limits. In practice, flue gas that typically consists of 80-88% N2 and 12-20% CO2 can be used as an efficient immiscible agent for enhancing heavy oil recovery through a free gas mechanism provided by N2 and a solubilization mechanism provided by CO2. The overall objective of this proposed research is to not only investigate the suitability and applicability for enhancing heavy oil recovery from the post-CHOPS reservoirs through the alkane/water-soluble solvents enhanced steam + flue gas recovery processes while minimizing environmental footprint, but also evaluate the possibility of safely storing CO2 in the depleted geological formations. With the successful development of direct contact steam generation (DCSG) processes referred to as the submerged combustion vaporizers (SCVs), this allows directly converting the untreated oilfield produced water into high-quality steam together with clean flue gas at high efficiency and low cost. With addition of alkane/water-soluble solvents, the newly proposed flue gas-assisted thermal recovery techniques with the optimized SCV operating parameters will be extended to the pilot tests in the targeted post-CHOPS reservoirs. The proposed research has the potential of providing the upstream oil and gas industry with viable techniques for efficiently and effectively recovering heavy oil from post-CHOPS reservoirs by taking advantages of both flue gas and thermal energy while minimizing freshwater usage as well as mitigating CH4 and CO2 emissions. This will also help Canada to become a technology resource centre, focusing on the usage of flue gases, EOR techniques for heavy oil reservoirs, and CO2 storage.

至于在加拿大西部存放的巨大重油储量，最常见的生产过程是用沙子（土壤）冷油生产（切成薄片），通常仅由于两种虫洞的产生而只能恢复原始油的5-15％和泡沫油流。因此，在这些后储层中，需要有效的随访增强的油回收率（EOR）技术，在这些后水库中，常规的基于蒸汽的热恢复技术和基于溶剂的非热恢复技术都可以找到其限制。实际上，通常由80-88％N2和12-20％CO2组成的烟气可以用作有效的不混溶剂，以通过N2提供的自由气体机制和CO2提供的溶解机制来增强重油的恢复。这项拟议的研究的总体目的不仅是调查通过通过整个储物柜从后库中增强重油回收的适用性和适用性 烷烃/水溶性溶剂增强了蒸汽 +烟气回收过程，同时最大程度地减少了环境足迹，但也评估了将CO2安全存储在耗尽的地质地层中的可能性。 随着直接接触蒸汽生成（DCSG）的成功开发，称为浸没燃烧蒸发器（SCV），这允许直接将未处理的油田生产的水与高质量的清洁烟气一起以高效率和低成本的方式转化为高质量的蒸汽。加上 烷烃/水溶性溶剂，新提出的具有优化SCV操作参数的新提出的烟道气体辅助热恢复技术将扩展到目标的后储藏室中的试验测试。拟议的研究具有为上游石油和天然气行业提供可行的技术，以通过摄入烟气和热能的优势，同时最大程度地减少CH4和CO2，从而有效，有效地从助后水库中回收重油。排放。这也将帮助加拿大成为一个技术资源中心，重点是烟气气体的使用，重油储层的EOR技术和二氧化碳存储。