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。
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:①the tool meets the requirements of strength while drilling,pressure resistance,and tightness,and the particle imaging has a good visibility;②the processing average background is better than the collection background,precenting a good performance of the effect of background subtraction;③detected 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 nondiagenetic gas hydrate mining.
作者
邓江
王国荣
谢冲
周守为
钟林
DENG Jiang;WANG Guorong;XIE Chong;ZHOU Shouwei;ZHONG Lin(College of Mechatronic Engineering,Southwest Petroleum University,Chengdu 610500,China;China National Offshore Oil Corporation,Beijing 100010,China;State Key Laboratory of Oil&Gas Reservoir Geology and Exploitation/Southwest Petroleum University,Chengdu 610500,China)
出处
《中山大学学报（自然科学版）（中英文）》
CAS
CSCD
北大核心
2021年第5期23-31,共9页
Acta Scientiarum Naturalium Universitatis Sunyatseni
基金
国家重点研发计划重点专项(2018YFC0310200)
国家重点研发计划(2016YFC0304008)
中国工程院重大咨询项目(2020-ZD-13-02)。
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
natural gas hydrate
detection while drilling
particle size detection
background subtraction
imaging visibility
