地球物理学进展 ›› 2019, Vol. 34 ›› Issue (1): 251-256.doi: 10.6038/pg2019BB0563

• 应用地球物理学Ⅰ(油气及金属矿产地球物理勘探) • 上一篇    下一篇

油井电磁全息成像精度和分辨率初探

张阔1,3,吴锡令3,闫景富3,蔡家铁2,3   

  1. 1. 中国电子信息产业发展研究院, 北京 100048
    2. 辽宁石油化工大学, 辽宁抚顺 113001
    3. 中国石油大学(北京)油气资源与探测国家重点实验室, 北京 102249
  • 收稿日期:2018-04-15 修回日期:2018-11-27 出版日期:2019-02-20 发布日期:2019-04-15
  • 作者简介:张阔,男,1987年生,博士,研究方向为工业技术创新.(E-mail: 274739214@qq.com)
  • 基金资助:
    国家科技重大专项课题“油气田开发动态监测测井系列技术与装备”资助.(2011ZX05020-006)

Preliminary investigations on the precision and resolution of electromagnetic holographic tomography in oil wells

ZHANG Kuo1,3,WU Xi-ling3,YAN Jing-fu3,CAI Jia-tie2,3   

  1. 1. China Center for Information Industry Development, Beijing 100048, China
    2. Liaoning Shihua University, Liaoning Fushun 113001, China
    3. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China
  • Received:2018-04-15 Revised:2018-11-27 Online:2019-02-20 Published:2019-04-15

摘要:

提出一种成像精度和分辨率探究思路,考察油井内气—水两相流动下的电磁全息测量适用性.以典型的泡状流为研究对象,检验实验测量与数值模拟结果的吻合程度.在不同半径的居中气泡和不同偏心程度的小气泡等极端情况下,利用测量数据进行电磁全息成像,通过占空比考察成像精度和分辨率.结果表明,当气泡居中时,气泡半径不小于管道半径的1/6时方可初步分辨,不小于1/4时方可准确分辨;当气泡半径为管道半径的1/12时,偏心量不小于管道半径的1/2时方可初步分辨,不小于2/3时方可准确分辨.当气泡半径或偏心程度更大时,分辨率将好于上述极端情况.

关键词: 油井两相流动, 电磁全息成像, 泡状流, 偏心程度, 分辨率

Abstract:

To propose a research idea of tomography precision and resolution for the applicability investigation of electromagnetic holographic measurement for gas-water two-phase flow in oil wells. Classical bubble flow is taken as the research object. Consistency of experimental measurement and numerical modeling results are examined. By considering the extreme conditions including centric bubbles with different radius and tiny bubbles with different eccentricities, electromagnetic holographic tomography is performed using measurement data, and their precision and resolution are investigated through the duty ratios. For the case of centric bubbles, when the bubble radius is 1/6 of flow tube radius, the distinguishment can be achieved, but with a large error; when the ratio is up to 1/4, the resolution is with a good accuracy. For the case when the bubble radius is 1/12 of flow tube radius, when the eccentricity ratio is up to 1/2, the distinguishment can be achieved, but with a large error; when the eccentricity ratio is up to 2/3, the resolution is with a good accuracy. When the radius or eccentricity is larger, there ought to be better resolutions compared with above extreme conditions.

Key words: Two-phase flow in oil wells, Electromagnetic holographic tomography, Bubble flow, Eccentricity ratio, Resolution

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