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胜利油区海上油田二元复合驱油体系优选及参数设计
赵方剑,曹绪龙,祝仰文,侯健,孙秀芝,郭淑凤,苏海波
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(1.中国石油大学(华东)石油工程学院,山东青岛266580;2.中国石化胜利油田分公司勘探开发研究院,山东东营257015;3.中国石化胜利油田分公司,山东东营257001)
摘要:
胜利油区海上油田水驱开发产量呈现逐年下降的趋势,急需转换为二元复合驱方式进行提速增效开发。二元复合驱作为大幅度提高原油采收率和采油速度的有效方法,已经在陆上油田大规模推广应用。但是,由于油藏条件存在差异,海上油田无法照搬陆上油田方案。按照海上油田开展二元复合驱技术要求,通过对多个驱油剂产品的溶解性、热稳定性、抗盐性等关键指标进行优选,得到由聚合物C10与复配的高效活性剂组成的配伍性和稳定性良好的二元复合驱油体系。结合室内物理模拟实验和数值模拟研究,对二元复合驱油技术的注入黏度、注入速度以及段塞尺寸等注入参数进行了优化设计。研究结果表明,该二元复合驱油体系注入0.4 PV之后,采收率提高29.2%,相对于同段塞尺寸单一聚合物驱增加11.3%。数值模拟预测结果显示,在最佳黏度比为0.5、注入速度为0.07 PV/a、最佳注入段塞尺寸为0.42 PV的条件下,与水驱相比二元复合驱可提高采出程度11.6%,最大幅度提高海上油田采油速度和原油采收率。
关键词:  二元复合驱  提高采收率  注入参数  采油速度  海上油田
DOI:10.13673/j.cnki.cn37-1359/te.2020.04.016
基金项目:国家科技重大专项“高温高盐油田化学驱提高采收率技术”(2016ZX05011-003)。
Injection parameters optimization of binary combination flooding system in offshore oil field,Shengli oil province
ZHAO Fangjian,CAO Xulong,ZHU Yangwen,HOU Jian,SUN Xiuzhi,GUO Shufeng,SU Haibo
(1.School of Petroleum Engineering,China University of Petroleum(East China),Qingdao City,Shandong Province,266580, China;2.Exploration and Development Research Institute,Shengli Oilfield Company,SINOPEC,Dongying City,Shandong Province,257015,China;3.Shengli Oilfield Company,SINOPEC,Dongying City,Shandong Province,257001,China)
Abstract:
The production rate through water flooding in offshore oil field,Shengli oil province is decreasing year by year,it is urgent to convert water flooding to binary combination flooding to accelerate the development and improve producing efficiency. As an effective method to dramatically improve oil recovery and oil recovery rate,binary combination flooding technology has been widely used in onshore oil fields. However,due to the difference of reservoir conditions,offshore oil field cannot copy the reservoir development program from onshore oil fields. According to the technical requirements of binary combination flooding in offshore oil field,Shengli oil province,the key factors such as solubility,thermal stability and salt resistance of oil displacement agents are evaluated,and the selected polymer C10 and high-efficiency compound surfactant form the binary combination flooding system with excellent performance of compatibility and stability. The injection viscosity,injection rate and plug size are optimized based on physical simulation and numerical simulation. The results show that after the injection volume of 0.4 PV,the EOR of binary compound flooding system reaches 29.2%,which is 11.3% higher than that of single polymer flooding system with the same plug size. Under the condition of the optimal viscosity ratio of 0.5,the injection rate of 0.07 PV/a and the optimal injection plug size of 0.42 PV,numerical simulation predicted that the EOR of binary compound flooding is 11.6% higher than that of water flooding,which can obtain the maximum increase of the oil recovery rate and oil recovery in offshore oil field.
Key words:  binary combination flooding  EOR  injection parameters  oil recovery rate  offshore oil field

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