Selecting laser fluorosensor detection band to monitor oil pipeline leaks

Abstract

Detection bands of the laser fluorosensor to detect oil pipeline leaks have been studied at the fluorescence excitation wavelength 355 nm. It is shown that a diversity of the fluorescence spectra of different oils and plant species leads to the need to adapt the number and position of spectral detection bands of the laser fluorosensor for the specific types of the pipeline oil and vegetation along the pipe way. With no interfering factors (that emerge false alarms) to monitor along the pipe way, only one spectral channel (at maximum position of the oil fluorescence spectrum) can be used. However, there can be a need to use both the two spectral channels (the channel 1 at maximum position of the oil fluorescence spectrum, and the channel 2 at maximum position of the vegetation fluorescence spectrum within ∼ 680…690 nm or ∼ 730…740 nm) and the tree spectral channels (the channel 1 at maximum position of the oil fluorescence spectrum, the channel 2 at maximum position of the vegetation fluorescence spectrum within ∼680…690 nm or ∼ 730…740 nm, and the channel 3 in the spectral band of 625-650 nm).

The choice of spectral ranges of registration for the fluorescent method for detecting leaks in oil pipelines at an excitation wavelength of 355 nm

“…The most significant factor affecting the detection of oil leaks by the laser-induced fluorescence method is the fluorescence of vegetation. Examples of the spectra of laser-induced fluorescence of vegetation (at the oil fluorescence excitation wavelength of 355 nm) are shown in Figure 3 [11,27,28].…”

Leakage simulation and acoustic characteristics based on acoustic logging by ultrasonic detection

“…Keramat and Duan (2021) developed a new technique for leak detection, called Matched-Field Processing. Fedotov et al (2021) studied the detection band of laser fluorescence sensor to detect oil pipeline leakage. Fu et al (2020) established the relationship between pressure distribution and leakage parameters through simulation and verified it through experiments.…”