A Leak Location Method for Oil and Gas Pipeline Based on Acoustic Amplitude

Abstract

The invention discloses a method for locating oil and gas pipeline leakage based on acoustic wave amplitude, which includes: establishing a calculation formula for locating leakage in the pipeline to be tested; Collect the leakage acoustic wave signal propagating along the medium in the pipe to obtain the leak detection threshold and reference pressure; carry out the second simulated leak test experiment between the sensors at both ends of the pipeline to be tested, and the acoustic wave sensors at the first and last ends collect the leakage acoustic wave propagating along the medium in the pipe signal, to obtain the amplitude of the low-frequency acoustic signal; for normal monitoring of the pipe section to be tested, leak detection is performed according to the leak detection threshold obtained from the first leak test experiment; leak location is performed according to the second leak test experiment and the positioning calculation formula. The invention does not consider the calculation of the sound wave propagation speed and the calculation of the time difference, avoids the installation of a GPS clock, has low cost, high sensitivity and strong applicability to oil and gas pipelines.

Description

technical field [0001] The invention belongs to the technical field of pipeline safety monitoring, in particular to an oil and gas pipeline leakage location method based on an acoustic wave amplitude attenuation model. Background technique [0002] When the oil and gas pipeline leaks, the fluid medium flows out of the pipeline, and the pressure in the pipeline drops suddenly to generate sound waves. According to the classification of the acoustic wave sensor, the sound wave can be divided into the sound collected by the audio sensor, the vibration signal collected by the acceleration sensor, and the dynamic pressure sensor. The dynamic pressure wave collected by the sensor has different waveform presentation methods depending on the sensor. The former two are suitable for short-distance pipelines, and the dynamic pressure wave is suitable for long-distance oil and gas pipelines. The sound wave propagates along the medium in the pipe and is collected by the dynamic pressure s...

AI Technical Summary

Problems solved by technology

[0010] (1) There is no unified formula for solving the sound wave propagation velocity that oil and gas pipeline leakage location depends on, and the applicability to oil pipelines and gas pipelines is insufficient, making the applicability of the leakage location method not universal. The reliability needs to be guaranteed, which increases the calculation amount of leak location

[0011] (2) The solution to the time difference for oil and gas pipeline leak location requires the use of GPS system to time the data signal collected by the acoustic sensor, which increases the cost of leak location on the one hand, and reduces the positioning accuracy on the other hand

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