摘要
为了解决火烧油层燃烧前缘监测问题,对室内一维燃烧管试验所采集的压力数据,运用Daubechies一阶小波提取其高频分量并进行对比分析。结果表明:压力波动的小波低频分量表征了燃烧管内压力水平的整体变化,而高频分量则与流体流动和燃烧稳定性变化一致;燃烧稳定时,压力波动的小波高频分量幅值基本恒定,而燃烧不稳定时,小波高频分量幅值波动较大;利用压力信号的高频分量能够监测火烧油层燃烧的稳定性。
Aimed to the problem of in situ combustion front detection, the pressure data of one-dimensional combustion tube experiment and its high-frequency component extracted by Daubechies one order wavelet were analyzed. The results show that the wavelet low-frequency component of pressure fluctuation indicates the overall pressure change in the combustion tube, and the wavelet high-frequency component is consistent with the change of fluid flow and combustion stability. The amplitude value of wavelet high-frequency component is constant when the combustion is stable, and the amplitude value fluctuates with a wide margin when the combustion is unstable. The combustion stability of in situ combustion can be detected by high-frequency component of pressure fluctuation.
出处
《中国石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第2期80-84,共5页
Journal of China University of Petroleum(Edition of Natural Science)
基金
中石化集团公司重大先导试验项目(P03001)
关键词
火烧油层
压力波动
小波分析
高频分量
燃烧稳定性
in situ combustion
pressure fluctuation
wavelet analysis
high-frequency component
combustion stability
