Design and experimental study of natural gas hydrate multiphase flow detection tool

DENG Jiang; WANG Guorong; XIE Chong; ZHOU Shouwei; ZHONG Lin

doi:10.13471/j.cnki.acta.snus.2020.01.09.2020B002

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Design and experimental study of natural gas hydrate multiphase flow detection tool

Research articles | 更新时间：2023-11-01

- Design and experimental study of natural gas hydrate multiphase flow detection tool
- Acta Scientiarum Naturalium Universitatis Sunyatseni Vol. 60, Issue 5, Pages: 23-31(2021)
- 作者机构：
  
  1.西南石油大学机电工程学院，四川成都 610500
  2.中国海洋石油集团有限公司，北京 100010
  3.油气藏地质及开发工程国家重点实验室 / 西南石油大学，四川成都 610500
- 作者简介：
- 基金信息：
- DOI：10.13471/j.cnki.acta.snus.2020.01.09.2020B002
  CLC： TH3
- Published：25 September 2021，
  
  Published Online：11 November 2020，
  
  Received：09 January 2020，
  
  Accepted：12 February 2020
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邓江,王国荣,谢冲等.天然气水合物多相流检测工具设计及实验研究[J].中山大学学报(自然科学版),2021,60(05):23-31.

DENG Jiang,WANG Guorong,XIE Chong,et al.Design and experimental study of natural gas hydrate multiphase flow detection tool[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2021,60(05):23-31.
邓江,王国荣,谢冲等.天然气水合物多相流检测工具设计及实验研究[J].中山大学学报(自然科学版),2021,60(05):23-31. DOI： 10.13471/j.cnki.acta.snus.2020.01.09.2020B002.

DENG Jiang,WANG Guorong,XIE Chong,et al.Design and experimental study of natural gas hydrate multiphase flow detection tool[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2021,60(05):23-31. DOI： 10.13471/j.cnki.acta.snus.2020.01.09.2020B002.

摘要

天然气水合物作为一种储量丰富的清洁能源，具有极高的开发价值和能源战略意义。为了研究固态流化开采中原位天然气水合物开采环境和开采过程中多相流的流动特性以及多相流中颗粒粒径等参数，设计了一套基于图像技术的随钻检测工具。在模拟的天然气水合物开采环境下，验证了装置的强度、耐压性、密封性以及成像的可见性；对比了平均背景、采集背景两种背景处理方式的处理效果；并通过背景扣除、中值滤波、阈值基剪切、Canny处理、形态学处理等图像处理技术从流动图像中提取了颗粒的粒度分布。结果表明：①该工具满足随钻强度、耐压性、密封性要求，颗粒成像具有良好的可见性；②平均背景处理效果优于采集背景处理效果，具有良好的背景扣除效果；③粒度检测分布与实验取样结果大体一致，证明了装置粒度检测的可行性。

Abstract

As a kind of clean energy with abundant reserves， natural gas hydrate has extremely high exploitation value and energy strategic significance. In order to the in-situ natural gas hydrate extraction environment in solid-state fluidized mining and the characteristics and the parameters such as extraction particle size of multiphase flow and the particle size of the multiphase flow during the extraction process， a set of inspection-while-drilling tools based on image technology was designed. In the simulated environment of natural gas hydrate， the strength， pressure resistance， tightness and visibility of the device were verified； the performance of the processing methods between average background and acquisition background was compared； the size distribution of particles was extracted from the flow image through processing techniques such as background subtraction， median filtering， threshold base clipping， Canny processing， morphological processing， etc. The results show that： ① the tool meets the requirements of strength while drilling， pressure resistance， and tightness， and the particle imaging has a good visibility； ② the processing average background is better than the collection background， precenting a good performance of the effect of background subtraction； ③ detected size distribution of particles is generally consistent with the experimental sampling results， which proves the feasibility of the device and lays the research foundation for the general law of multiphase flow detection and exploiting fragmentation in non-diagenetic gas hydrate mining.

关键词

天然气水合物随钻检测粒度检测背景扣除成像可见性

Keywords

natural gas hydratedetection while drillingparticle size detectionbackground subtractionimaging visibility

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