西安石油大学学报（自然科学版）2025，Vol.40Issue(3)：39-47,9.DOI:10.3969/j.issn.1673-064X.2025.03.004
CO2分层配注气嘴结构优化
Structural Optimization of Nozzle for Layered CO2 Injection
摘要
Abstract
Stratified CO2 injection can effectively avoid interlayer interference and achieve balanced injection and production in multiple layers of oil and gas reservoir.The injection nozzle is the key to the design of single-tube layered injection tool,which requires the char-acteristics of large diameter and strong throttling to avoid the blockage of the nozzle by impurities in CO2.The flow characteristics of five common types of gas nozzles such as straight cone type and straight type are studied by numerical simulation.Based on the research re-sults,a class of flat-conical gas nozzles were designed and their structural parameters are optimized.The results show that the local pres-sure loss of sudden contraction type gas nozzles is large due to the sudden decrease of flow area,and their throttling effect is obviously better than that of the gradual contraction type gas nozzles.The gas nozzle with expansion section has the best throttling effect because fluid collision friction and vortex leads to greater kinetic energy loss.For the flat-cone nozzles,the larger the cone angle and angular mo-mentum,the greater the energy loss and pressure difference before and after the nozzle.The designed flat-cone type gas nozzle has the characteristics of large diameter and strong throttling,and can meet the requirements of layered CO2 injection.关键词
CO2分层配注/节流效果/气嘴结构/流动特性Key words
stratified CO2 injection/throttling effect/nozzle structure/flow characteristic分类
石油、天然气工程引用本文复制引用
邹明华,幸雪松,杨树坤,陈欢,赵广渊,李越,宫汝祥,王海柱,王瑞..CO2分层配注气嘴结构优化[J].西安石油大学学报（自然科学版）,2025,40(3):39-47,9.基金项目
中国海洋石油有限公司科研项目"海上油藏气驱提高采收率技术"(KJGG2021-0505) （KJGG2021-0505）
