摘要
由于稠油油藏油层物性差异,导致油井各层或不同井段的吸汽、吸热不均,油层动用程度较差,常采用分层注汽技术来解决这一问题.针对分层注汽管柱的喷嘴设计,通过理论分析和数值模拟方法,研究了喷嘴扩容和喷嘴角度对蒸汽干度的影响.结果表明:喷嘴角度大小将影响湿蒸汽两相流动相分离效果,导致喷嘴内蒸汽干度发生变化;因喷嘴结构、数量、壁面散热、高速流动产生的耗散热以及后期油层压力升高,湿蒸汽经喷嘴靠扩容提高蒸汽干度的能力极小.
Due to the differences of the oil reservoir properties,the entering performance of steam is always uneven in different layers or different sections in a same well.Because of the low yield,zonal steam injection is proposed as a promising solution.Aimed at the design of the nozzle structure,the influence of dilatation and dip angle of spray nozzle in steam injection pipe string on steam dryness are studied by theoretical analysis and numerical simulation.The results show that the nozzle dip would affect the phase separation of the two-phase flow of wet steam,which cause the steam dryness change within the nozzle.The nozzle capacity of increasing steam dryness is minimal because of many factors such as nozzle structure,the number of nozzle,heat loss of tube wall,dissipated heat generated by the high-speed flow,and later elevated reservoir pressure.
出处
《曲阜师范大学学报（自然科学版）》
CAS
2018年第1期69-75,共7页
Journal of Qufu Normal University(Natural Science)
基金
山东省自然科学基金(ZR2017MEE030)
"十三五"国家科技重大专项子课题(2016ZX05012-002-005)
关键词
热采
注蒸汽
干度
喷嘴
Thermal recovery
steam injection
steam dryness
spray nozzle
