基于时变时间序列分析的凝析天然气流量计量  

Wet Gas Flow Measurement Based on Time-varying Series Analysis

作　　者：孙世稳[1] 郑金吾[1] 耿艳峰[1] 孔倩倩[1] 

机构地区：[1]中国石油大学信息与控制工程学院,山东东营257061

出　　处：《化工自动化及仪表》2009年第6期37-40,共4页Control and Instruments in Chemical Industry

基　　金：国家自然科学基金资助项目(60672003);山东省自然科学基金资助项目(Y2006F49);中国石油大学硕士研究生创新基金资助项目(S2007-11)

摘　　要：凝析天然气的各相流量是监测、控制气井和气藏动态特性的主要依据.为了研究分相流量,采用一种新的软测量技术,开发出一种在线计量的多相流计量系统。首先对差压信号进行小波模极大值去噪;建立时变AR模型提取相关特征值,研究特征值与气液两相流流量之间的关系,采用RBF网络预报气液分相流量。Gas-liquid two phase flow rates of wet gas can provide essential reference to monitor gas well and gas reservoir dynamic characteristic. In order to study the individual flow rate,a new soft-measuring technique is introduced, an online measuring system of two-phase flow was opened out. Firstly, the differential pressure signal was pretreated through wavelet transform modulus maximum method;Secondly,the time-varying model was set up, got the relative eigenvalues,studied on the correlation between eigenvalues and the individual flow rate;Finally, the RBF network is used to predict the individual flow rate.

关 键 词：差压信号 时变AR分析 递推最小二乘法 气液分相流量 

分 类 号：O359[理学—流体力学]