Quantification of the concentration dependent diffusivity and dispersivity of light hydrocarbons in heavy oil

重油中轻质烃的浓度依赖性扩散率和分散率的量化

• 批准号: 402561-2011
• 负责人: James, Lesley
• 金额: $ 1.75万
• 依托单位: Memorial University of Newfoundland
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=509879
• 关键词: Quantification; concentration; dependent; diffusivity; dispersivity

The oil sands in western Canada account for 180 of the 185 billion barrels of recoverable oil but contain heavy oil and bitumen whose viscosity ranges from 1,000 to over one million centipoises (water is 1 cP). The recovery of the in-situ heavy oil relies on our ability to reduce the oil's viscosity and mobilize it in the pore space of tightly packed sand grains or consolidated carbonate rocks. Commercially, energy and water intensive thermal methods are used where steam is injected into one well, viscosity is reduced by heat transfer, the oil is mobilized to the production well and brought to the surface. A less energy intensive and more sustainable method uses light hydrocarbon solvents instead of steam to reduce the bitumen's viscosity via mass transfer.

加拿大西部的油砂占1850亿桶可采石油中的180亿桶，但含有稠油和沥青，其粘度在1000到100多万厘泊（水为1厘泊）之间。原位稠油的开采取决于我们降低原油粘度的能力，并将其动员到致密砂岩或固结碳酸盐岩的孔隙空间中。在商业上，采用能源和水密集型热法，将蒸汽注入一口井，通过传热降低粘度，将石油动员到生产井并带到地面。一种能耗更低、更可持续的方法是使用轻烃溶剂代替蒸汽，通过传质来降低沥青的粘度。