低渗油藏CO_(2)非混相驱过程原油沥青质沉积影响因素研究  

Study on Influencing Factors of Asphaltene Deposition During CO_(2) Immiscible Flooding in Low Permeability Reservoirs

作　　者：李超跃 陈龙龙 汤瑞佳 谢旭强 王蓓蕾 尚庆华 Li Chaoyue;Chen Longlong;Tang Ruijia;Xie Xuqiang;Wang Beilei;Shang Qinghua(Research Institute of Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Xi’an 710075)

机构地区：[1]陕西延长石油(集团)有限责任公司研究院,陕西西安710075

出　　处：《石化技术》2025年第2期277-279,共3页Petrochemical Industry Technology

摘　　要：针对延长油田CO_(2)非混相驱原油沥青质沉积因素不明确的问题,采用区块天然岩心以及油样进行CO_(2)非混相驱室内驱油实验,研究驱替压差、驱替压力、原油沥青质初始含量、温度、岩心渗透率、CO_(2)注入量对沥青质沉积量的影响。实验结果表明,不同因素影响下,岩心中沥青质沉积量在20.14%~59.64%之间;驱替压力、CO_(2)注入量、原油沥青质初始含量与沥青质沉积量成正相关,渗透率、驱替压差成负相关;原油沥青质初始含量随温度升先降低后增加。利用灰色关联法得出CO_(2)注入量、驱替压力、原油沥青质初始含量、温度对沥青质沉积量影响相对较大,驱替压差对沥青质沉积量相对较小,岩心渗透率的影响程度最低。Aiming at the unclear asphaltene deposition factors of CO_(2) immiscible flooding crude oil in Yanchang Oilfield,the natural cores and oil samples of the block were used to carry out indoor oil displacement experiments of CO_(2) immiscible flooding,and the displacement pressure difference,displacement pressure,and initial asphaltene of crude oil were studied.The experimental results show that under the influence of different factors,the amount of asphaltene deposition in the core is between 20.14%and 59.64%;displacement pressure,CO_(2) injection rate,initial asphaltene content of crude oil and asphaltene deposition.Using the gray correlation method,it can be concluded that the amount of CO_(2) injection,displacement pressure,initial asphaltene content of crude oil,and temperature have a relatively large impact on the amount of asphaltene deposition.

关 键 词：CO_(2)驱油 非混相 沥青质沉积 灰色关联法 多孔介质 

分 类 号：U41[交通运输工程—道路与铁道工程]