Large-scale experimental device and method for detecting magnetic signals in solute transport in saturated media

Abstract

The invention relates to the technical field of solute migration, in particular to a large-scale experimental device for detecting magnetic signals in the process of solute migration under a saturated medium. The device includes a sampling unit, a pretreatment unit and a sandbox testing unit, the sampling unit is connected to the sandbox testing unit through a pipeline, and the pretreatment unit is arranged on the connecting pipeline between the sampling unit and the sandbox testing unit. The device makes it suitable for magnetic signal inversion by adjusting the proportion of the sand box, and can add a fixed-source magnetic field when the magnetic signal is insufficient to generate an alternating electromagnetic field to enhance the magnetic signal. For collection, the bottom of the sand box and its surroundings are reinforced with wooden boards to avoid deformation and breakage of the joints of the sand box caused by excessive internal pressure of the sand box. The sand box is wrapped with heat-insulating materials to maintain temperature stability during the experiment. The whole set of experimental equipment does not contain any metal materials, so as to avoid interference to the magnetic signal monitoring.

Description

Technical field: [0001] The invention belongs to the technical field of solute migration, and in particular relates to a large-scale experimental device and method for detecting magnetic signals in the process of solute migration under a saturated medium. Background technique: [0002] The inversion of reservoir structure characteristics in deep saturated aquifers has always been the bottleneck of current exploration technology. The most important problem is that the currently applied tracer technology uses the inversion and analysis of water outlet concentration data, and cannot analyze The material signal is monitored in real time, and the results obtained by the tracer technology are two-dimensional, which cannot be used for three-dimensional tracer of the reservoir. In order to solve this problem, the research and development of new exploration technology has become an important research direction, among which magnetic detection technology is expected to solve this probl...

AI Technical Summary

Problems solved by technology

[0002] The inversion of reservoir structure characteristics in deep saturated aquifers has always been the bottleneck of current exploration technology. The most important problem is that the currently applied tracer technology uses the inversion analysis of water outlet concentration data, and cannot analyze The material signal is monitored in real time, and the result obtained by the tracer technology is two-dimensional, so it is impossible to perform three-dimensional tracer on the reservoir

In order to solve this problem, the research and development of new exploration technology has become an important research direction, among which magnetic detection technology is expected to solve this problem. In the process of magnetic detection technology research and development, indoor experiments are particularly important, but it is often difficult to simulate deep aquifers in current experiments Reservoir structure characteristics, this is because when the experiment is carried out, due to the change of temperature and pressure of sand box reservoir medium and injected fluid, there will be local subsidence, which will lead to the existence of preferential flow during the migration process, which will affect the reaction of the experiment. At the same time, the background value of the magnetic signal is strong, so the current experimental device also lacks large-scale experimental devices and experimental methods that can monitor, enhance and perform magnetic signal inversion.

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