Method of monitoring underground leakage of oil storage region in real time

Abstract

The invention relates to a method of monitoring underground leakage of an oil storage region in real time. Underground leakage real-time monitoring is established for the oil storage region, leakage condition of the oil storage region and migration direction and process of post-leak oily matters can be monitored in real time; a warning is sent after leaking occurs. The method herein includes the steps of establishing a monitoring region 1-3 meters around the oil storage region, dividing the monitoring region that is circular into n rectangular sub-regions equal in area an distributed in singlerows and columns, wherein vertexes of the n rectangular sub-regions are totally provided with (2n+2) resistivity probes; sequentially powering electrodes of the probes during resistivity measurement,subjecting all the electrodes of the adjacent probes to potential measurement; performing inversion imaging to obtain probe resistivity distribution; performing initial resistivity measurement to obtain resistivity background values of the probes, and determining leak position in the oil storage region and a diffusion direction of oil according to ratios I1 of the resistivities at all moments tothe background values.

Description

technical field [0001] The invention relates to a system and method for real-time monitoring of underground seepage in an oil storage area, and belongs to the technical fields of pollution prevention and control and environmental monitoring. Background technique [0002] Petroleum is a serious pollutant. With the development of my country's economy in recent years, the number of domestic gas stations has continued to increase, and some oil storage tanks have serious aging problems, and the risk of oil storage tank leakage has also increased. If oil leakage occurs in the oil storage tank, it will cause the oil to be discharged into the surrounding soil and water and cause pollution. Therefore, more and more attention has been paid to the monitoring of oil storage tank leakage. [0003] At present, the main monitoring methods for underground oil pollution are monitoring wells and borehole sampling, and chemical analysis of soil and water samples. If problems are found, the d...

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Problems solved by technology

[0006] The above two patents were applied for earlier, although they are based on real-time monitoring, automatic data collection and intelligent processing, but the technical defects are also obvious

First, it is aimed at the monitoring of the scope of pollution diffusion after leakage outside the pipeline and pollution source, and real-time monitoring cannot be implemented for the oil storage area (or oil storage tank) as the pollution source; second, the front-end monitoring area is selected along the pipeline Due to the randomness of the time and location of leakage accidents, this kind of monitoring is easy to miss judgment.

[0007] Third, based on the high-density resistivity method, each probe rod works independently, and the power supply and measurement are on the same probe rod. The resistivity strip measurement pipeline leakage is also based on this technology, and a single point of data is measured each time, so it is impossible Identify tiny leaks, but the monitoring accuracy is not high

Therefore, the monitoring effect is not precise enough, the error is large, and it is difficult to detect and predict the direction of pollution diffusion

[0009] Based on the above comparative analysis, the existing monitoring techniques are still difficult to meet the requirements of real-time monitoring in the oil storage area, and it is impossible to detect and determine the location of the leakage point in the early stage of leakage.

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