Oil and gas pipeline leakage positioning method based on sound wave amplitude

Abstract

The invention discloses an oil and gas pipeline leakage positioning method based on sound wave amplitude. The oil and gas pipeline leakage positioning method comprises the following steps of establishing a leakage positioning computing formula in a to-be-tested pipeline; performing the first simulating leakage testing experiment at the upstream of a sensor at the head end, enabling sound wave sensors at the head end and the tail end to collect leakage sound wave signals which are propagated along the pipeline medium, and obtaining a leakage detection threshold value and the reference pressure; performing the second simulating leakage testing experiment between the sensors at the two ends of the to-be-tested pipeline, enabling the sound wave sensors at the head end and the tail end to collect leakage sound wave signals which are propagated along the pipeline medium, and obtaining the amplitude of a low-frequency sound wave signal; normally monitoring the to-be-tested pipeline, and detecting the leakage according to the leakage detection threshold value obtained by the first leakage testing experiment; according to the second leakage testing experiment and the positioning computing formula, positioning the leakage. The oil and gas pipeline leakage positioning method has the advantage that by not considering the computing of the sound wave propagation speed and the computing of the time difference, the mounting of a GPS (global positioning system) clock is avoided, the cost is low, the sensitivity is high, and the suitability for the oil and gas pipeline is high.

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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