摘要
为解决Thornhill-Craver方法预测气举阀流量不准确的问题,以空气为介质,在气举阀实验平台上开展气举阀流量研究。对2.8、3.2、4.8、6.4 mm阀孔尺寸的气举阀进行实验,得到不同阀孔尺寸下阀杆行程与流量系数、临界压力比的函数关系;通过考虑阀球表面压力随工况条件的动态变化过程,引入阀的打开程度,优化了阀杆行程求解方法;对气举阀过流面积进行建模,利用已知参数分析推导了过流面积计算新方法;在实验及理论分析基础上,建立了气举阀流量预测新模型。研究结果表明:新模型对不同阀孔尺寸及工况条件下气举阀流量预测准确,平均相对误差为3.34%,较Thornhill-Craver方法有了较大提高,对判断气举阀在井下的工作状态及提高气举设计的精度具有重要意义。
To address the inaccuracy of the Thornhill-Craver method in predicting gas-lift valve flow rates,research on gas-lift valve flow was conducted using air as the medium on a gas-lift valve test platform.Experiments were carried out on gas-lift valves with orifice sizes of 2.8,3.2,4.8 and 6.4 mm,resulting in a functional relationship between valve stem travel and flow coefficient,as well as critical pressure ratio for different orifice sizes.By considering the dynamic changes in surface pressure of the valve ball under operating conditions and introducing the degree of valve opening,the method for solving the valve stem stroke was optimized.A model for the flow area of the gas-lift valve was developed,and a new method for calculating the flow area was derived using known parameters.Based on experimental and theoretical analysis,a new model for predicting the flow rate of gas-lift valves was established.The research results indicate that the new model accurately predicts the flow rates of gas-lift valves for different orifice sizes and under various working conditions,with an average relative error of 3.34%,which is a significant improvement over the Thornhill-Craver method.This is of great importance for determining the working state of gas-lift valves downhole and for improving the precision of gas-lift design.
作者
侯耀东
廖锐全
王伟
罗威
周东慧
陈雯
HOU Yao-dong;LIAO Rui-quan;WANG Wei;LUO Wei;ZHOU Dong-hui;CHEN Wen(School of Petroleum Engineering,Yangtze University,Wuhan 430100,China;Laboratory of Multiphase Pipe Flow of CNPC Gas Lift Innovation Center,Wuhan 430100,China;Hubei Key Laboratory of Drilling and Production Engineering for Oil and Gas,Wuhan 430100,China;Research and Development Center,Tuha Oilfield Company,CNPC,Shanshan 838202,China)
出处
《科学技术与工程》
北大核心
2024年第25期10746-10754,共9页
Science Technology and Engineering
基金
国家自然科学基金(62173049)
油气钻采工程湖北省重点实验室开放基金(YQZC202309)。
