测井技术2023，Vol.47Issue(6)：701-709,9.DOI:10.16489/j.issn.1004-1338.2023.06.008
CO2注入井恒流堵塞器气嘴嘴损系数影响因素研究
On the Factors Influencing the Loss Coefficient of the Gas Nozzle of the Constant Flow Blocker in CO2 Injection Wells
摘要
Abstract
In recent years,most oilfields have entered the high-water cut development stage,and layered injection has become an important method to further increase crude oil production.The choke valve,as a key instrument for water distribution,is directly affected by factors such as nozzle size,injected fluid medium,and wellhead pressure,which have a significant impact on the nozzle loss coefficient.In this paper,numerical simulation is used to calculate the devices of choke valves under different influencing factors,and obtain velocity and pressure distribution maps of the fluid.The changes in the nozzle loss coefficient in the gas nozzle system during CO2 injection are analyzed,and the relationship between the nozzle loss coefficient and nozzle size and inlet pressure is determined.The analysis results show that under the same nozzle size,as the inlet pressure increases,the CO2 changes from gas phase to liquid phase,and the nozzle loss coefficient decreases monotonically and then tends to be flat.By setting appropriate inlet pressure and nozzle size,the pressure loss of the choke valve can be minimized.Based on the obtained variation law of the nozzle loss coefficient,real-time and accurate control of CO2 injection wells can be achieved by changing the nozzle size.The conclusions obtained have guiding significance for the selection and matching of gas nozzles for on-site layered CO2 injection.关键词
CO2注入/嘴损系数/恒流堵塞器/压损Key words
CO2 injection/nozzle loss coefficient/choke valve/pressure loss引用本文复制引用
李烨烨,孟玟妤,杨韵桐,刘兴斌..CO2注入井恒流堵塞器气嘴嘴损系数影响因素研究[J].测井技术,2023,47(6):701-709,9.基金项目
国家自然基金面上基金项目"网络模型的智能分层注水井压力脉冲数据传输方法"(52174021) （52174021）
黑龙江省大学生创新创业训练计划项目"分层注气井中恒流堵塞器水嘴嘴损系数影响因素及响应特性研究"(S202210220108) （S202210220108）
