[1]刘立. 基于雷诺数的流量校准点优化设计新方法[J].油气井测试,2020,29(06):8-14.[doi:10.19680/j.cnki.1004-4388.2020.06.002]
　LIU Li.A new method of optimal design of flow calibration point based on Reynolds number[J].Well Testing,2020,29(06):8-14.[doi:10.19680/j.cnki.1004-4388.2020.06.002]
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 基于雷诺数的流量校准点优化设计新方法()
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《油气井测试》[ISSN:1006-6977/CN:12-1485/TE]

卷:
29卷
期数:
2020年06期
页码:
8-14
栏目:
出版日期:
2020-12-25

文章信息/Info

Title:
A new method of optimal design of flow calibration point based on Reynolds number
文章编号:
1004-4388(2020)06-0008-07
作者:
刘立
中国石油大庆油田有限责任公司测试技术服务分公司 黑龙江大庆 163513
Author(s):
LIU Li
Well Testing Technology Service Branch, PetroChina Daqing Oilfield Co., Ltd., Daqing, Heilongjiang 163513, China
关键词:
 ; 井下流量计; 校准点; 雷诺数; 临界流量; 校准曲线拐点; 流道切换点
Keywords:
 ; Downhole flowmeter;  calibration point;  Reynolds number;  critical flow rate;  inflection point of calibration curve;  switching point of flow channel
分类号:
TE21
DOI:
10.19680/j.cnki.1004-4388.2020.06.002
文献标志码:
A
摘要:
 为有效提高井下流量计流量校准精度，落实在一定流量校准区间或特定流量校准点出现示值超差或偏差的问题，采用基于雷诺数的流体力学临界流量方程数学推导模型，确定了按流型流量区间、临界流量、流量校准曲线拐点、流道切换点等进行流量校准点选取新原则，考虑了井下流量计校准影响因素，实施了流量校准点优化设计新方法。流量校准点采用新方法后流量校准结果表明，在流量校准精度上，流量曲线标定方程相关系数R较未采用流量校准点优化设计前明显提高；在流量曲线台阶平稳性上，150支井下流量计流量曲线台阶平稳率平均达80%以上；在流量校准上限选定上，当测量上限不大于100 m3/d，150支井下流量计一次校准成功率平均达80%以上；当测量上限大于100 m3/d，一次校准成功平均达90%以上，流量校准上限不同，一次校准成功率有所不同，流量校准上限越高，一次校准成功率越高。流量校准点优化再设计，有效规避一定流量校准区间或特定流量校准点，为提高流量校准质量提供可借鉴方法。
Abstract:
 In order to effectively improve the flow calibration accuracy of downhole flowmeter, and solve the problem that the indication value is out of tolerance or deviation in a certain flow calibration interval or a specific flow calibration point, the mathematical derivation model of critical flow equation based on Reynolds number is used to determine the new principle of selecting flow calibration points according to flow pattern and flow interval, critical flow rate, inflection point of flow calibration curve and channel switching point This method takes the influence factors of downhole flowmeter calibration into account, and implements a new method of flow calibration point optimization design. The flow calibration results show that the correlation coefficient R of the calibration equation of the flow curve is significantly improved compared with that before the optimization design of the flow calibration point. In terms of the step stability of the flow curve, the average stability rate of the 150 downhole flowmeters is more than 80%. When the upper limit of flow calibration is selected, and the upper limit of measurement is not more than 100 m3/d, the average success rate of one calibration of 150 downhole flowmeters is more than 80%; when the upper limit of measurement is greater than 100 m3/d, the average success rate of one calibration is more than 90%. The higher the upper limit of flow calibration is, the higher the success rate of primary calibration is. The optimal redesign of flow calibration points can effectively avoid a certain flow calibration interval or a specific flow calibration point and provide a reference method for improving the quality of flow calibration.

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备注/Memo

备注/Memo:
 2020-07-20收稿，2020-11-01修回，2020-11-07接受，2020-12-20 网络版发表
刘立，男，1970年出生，工程师，2005年毕业于哈尔滨工程学院计算机专业，现主要从事生产测井仪器维修、校准及管理工作。电话：0459-5298956，15304698291；Email：dlts_liuli@petrochina.com.cn。通信地址：黑龙江省大庆市红岗区图强东街7号，邮政编码：163414。
更新日期/Last Update: 2021-01-07