基于小扰动理论的低频脉冲压力波在井筒内传播规律分析  

Analysis of Propagation Law of Low-frequency Pulse Pressure Wave in Wellbore Based on Small Disturbance Theory

作　　者：刘承婷[1] 陈甜 于振国 尹井奇 杨钊[1] 李盖宇 LIU Cheng-ting;CHEN Tian;YU Zhen-guo;YIN Jing-qi;YANG Zhao;LI Gai-yu(School of Petroleum Engineering, Northeast Petroleum University, Daqing 163318, China)

机构地区：[1]东北石油大学石油工程学院,大庆163318

出　　处：《科学技术与工程》2022年第4期1424-1431,共8页Science Technology and Engineering

基　　金：中石油创新基金(2019D-5007-0205)。

摘　　要：脉冲压力可以提高驱油效果,为了研究低频脉冲压力波在注入井筒中的传播衰减规律及影响因素。基于线性小扰动理论,建立脉冲压力波动在井筒中传播的数学模型,通过数学模型找到影响低频脉冲驱油的关键因素,用FLUENT的UDF(user define function)接口模拟脉冲压力波在井筒中传播的过程,采用因素分析方法进行岩心实验,结合低频脉冲器-井筒-地层的一体化实验验证方法。结果表明:频率为0.03~0.04 Hz,波长45~60 m,振幅为0.8 MPa为适合井筒和地层的最佳驱油参数。Pulse pressure can enhance the oil displacement effect.In order to study the transmission and decay laws of low-frequency pulse pressure wave and influencing factors during injection.The mathematical model of pulse pressure wave transmission in the wellbore was created based on the linear perturbation theory,the key factors of affecting oil displacement by low-frequency pulse were found through the mathematical model,the process of pulse pressure wave transmission in the wellbore was simulated through user define function(UDF)interface of FLUENT,the core experiment was carried out by factor analysis method and the integrated experimental verification method of low-frequency pulser-wellbore-formation was used.The results show that the optimal oil displacement parameters suitable for wellbore and formation are the frequency of 0.03~0.04 Hz,the wavelength of 45~60 m and the amplitude of 0.8 MPa.

关 键 词：低频脉冲 线性小扰动 压力波动 UDF接口 FLUENT 

分 类 号：TE357[石油与天然气工程—油气田开发工程]