Marine soil resistivity measuring method and device

Abstract

The invention discloses a marine soil resistivity measuring method and device. The device comprises a probe bar which comprises a top tank, a bar body and a probe. The bar body is connected with the top tank and the probe. The top tank is provided with a hook. A built-in power supply, a control circuit, a constant current source circuit, a data acquisition circuit, a sensing circuit and an acceleration sensor which is connected with the sensing circuit are formed in the top tank. An electrode sequence is formed on the probe. The electrode sequence comprises two power supply electrodes and at least two measuring electrodes. The power supply electrodes and the measuring electrodes are communicated with the outside and are arranged on the probe. The power supply electrodes are connected with the constant current source circuit through a wire located in the bar body. The measuring electrodes are connected with the data acquisition circuit through a wire located in the bar body. According to the invention, in-situ, fast and accurate measurement of the resistivity of marine soil in a certain depth is realized.

Description

technical field [0001] The invention belongs to the technical field of ocean measurement, and in particular relates to a method and a device for measuring ocean soil resistivity. Background technique [0002] The 21st century is the century of the ocean. With the laying of submarine pipelines and cables, and the exploration and development of submarine oil and gas resources, the research on the physical mechanics and engineering geological properties of marine soils, especially the research on the properties of complex deep-sea marine soils, has attracted more and more attention. . In recent years, resistivity detection technology has been widely used in the testing of marine soil physical indicators, resource development and utilization, etc. Resistivity is a basic physical index that characterizes the conductivity of soil, and can reflect the basic physical and mechanical properties and structural characteristics of soil. Therefore, measuring the resistivity of marine soi...

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Problems solved by technology

However, the electrical logging method will still cause a large disturbance to the soil layer around the well wall during the excavation and logging process, which leads to uncertainty and inaccuracy of the measurement results

Moreover, the method of electrical logging requires excavation logging, the process is complex, the cost and cost are too high, and the investment in a measurement process is relatively large

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