垂直上升管内多光纤传感器持气率估计算法研究  

Estimation Method of Gas Holdup in Vertical Rising Pipe by Multi-fiber Sensors

作　　者：于莉娜[1] 孔维航[1] 孔令富[1] 刘晓磊[2] 李英伟[1] 

机构地区：[1]燕山大学信息科学与工程学院,河北秦皇岛066004 [2]大庆油田有限责任公司测试技术服务分公司,黑龙江大庆163100

出　　处：《测井技术》2013年第5期476-480,共5页Well Logging Technology

基　　金：国家科技重大专项油气田开发动态监测测井系列技术与装备(项目编号:2011ZX05020-006)

摘　　要：提出一种基于油井井下新型多光纤传感器数据融合估计的油气水三相流持气率测量方案。传感器工作于内径为20 mm垂直上升管内。利用多传感器数据融合技术,对采集的原始数据进行预处理,然后基于时间融合的自适应加权对各单光纤传感器进行局部估计,最后基于时间-空间融合的加权平均及递推估计对多光纤传感器进行全局估计,从而提高系统的测量精度和准确性。实验研究表明,该方法使系统测量平均截面持气率误差小于1.0%,降低了系统误差,提高了系统准确性,可为油气田开发动态监测过程提供真实、有效的结果。Proposed is a new gas holdup measurement method of oil-gas water three phase flow in the logging well, which is based on a novel multi-fiber sensors data fusion estimation in 20 mm inner diameter vertical rising pipe. After preprocessing of the collected raw data, we do locality estimation for each fiber optical sensor based on time fusion adaptive-weighting method. And then, we do global estimation for multi-fiber sensor based on time space fusion of the weighted average and recursive estimation, so as to improve the measure precision and accuracy of the system. Experiment research indicates that by using this method, the system average cross section gas holdup error is less than 1.0%, the system error is reduced, and the system accuracy is improved. This method could provide authentic and effective dynamic monitoring result for oilfield development.

关 键 词：生产测井 垂直上升管 光纤传感器 加权均值 递推估计 自适应加权 持气率 

分 类 号：P631.84[天文地球—地质矿产勘探]