同心双管射流泵流量修正系数的优化研究  

Optimization of Flow Rate Correction Coefficient of Concentric Double-Tube Jet Pump

作　　者：乔倩瑜 罗懿[1,2] 赵润冬 周瑞立[1,2] 周舰[1,2] Qiao Qianyu;Luo Yi;Zhao Rundong;Zhou Ruili;Zhou Jian(North China Oil&Gas Company,SINOPEC;Sinopec Key Laboratory of Deep CBM Exploration and Development)

机构地区：[1]中国石化华北油气分公司,河南省郑州市450006 [2]中国石化深层煤层气勘探开发重点实验室

出　　处：《石油机械》2025年第3期109-114,共6页China Petroleum Machinery

基　　金：中国石油化工股份有限公司科研项目“东胜气田钻采工艺关键技术研究”(KJGLB-2022-13)。

摘　　要：射流泵排水采气工艺是释放高产水气井产能的重要排采工艺,但在实际应用中射流泵理论方程存在气井适应性差、计算结果误差大、无法精准指导工艺参数设计的问题。基于射流泵理论排量方程,分析造成理论计算值与实际值之间存在误差的原因,明确流量修正系数优化对射流泵工艺设计的重要作用,并依托Q1井同心双管射流泵工艺+井下智能监测技术,建立了一套有效的流量修正系数计算方法,拟合出一个六元参数流量修正系数经验方程,准确率达98%;相较于常规计算方法误差减小了48.2%,提升了吸入口压力的计算精度。采用该方程对另外3口同心双管射流泵进行参数优化,优化后的平均日产气量增加1542 m^(3),平均日产液量增加2.5 m^(3)。所得结论对于进一步指导射流泵工艺在排水采气中的实际应用具有重要意义。Gas recovery by water drainage with jet pump is a critical technology to release the production capacity of gas wells with high water production.In practice,however,the theoretical equation of jet pump has problems such as poor adaptability to gas wells,large calculation errors and failure to accurately guide technical parameter design.In this paper,based on the theoretical displacement equation of jet pump,the causes for the error between the calculated value and the actual value were analyzed,and the importance of the flow rate correction coefficient optimization in the technical design of jet pump was clarified.Furthermore,relying on the combination of concentric double-tube jet pump process and downhole intelligent monitoring in Well Q1,an effective flow rate correction coefficient calculation method was established,and a six-element empirical equation of flow rate correction coefficient was determined by fitting,with an accuracy of 98%.This method yields an error 48.2%lower than traditional calculation method,indicating an improved accuracy of intake pressure calculation.Using the sixelement equation,the parameters of other three concentric double-tube jet pumps were optimized,showing the average daily gas flow rate increased by 1542 m^(3) and the average daily liquid flow rate increased by 2.5 m^(3).The conclusions are of great significance for further guiding the practical application of jet pump technology in gas recovery by water drainage.

关 键 词：排水采气 同心双管射流泵 理论排量方程 流量修正系数 吸入口压力 多因素拟合 

分 类 号：TE37[石油与天然气工程—油气田开发工程]