Long-term preservation method for frangible rock core

Abstract

The invention relates to a long-term preservation method for a frangible rock core. The method comprises steps of firstly, subjecting the rock core to cutting to obtain a to-be-polished core body, and then polishing the cutting surface of the to-be-polished core body to obtain a to-be-casted core body with a smooth cutting surface, and then placing the to-be-casted core body in a transparent U-shaped groove for casting. Therefore, the frangible rock core can be preserved for a long time. By using the method of the invention, the frangible rock core can be preserved for a long time after polishing and casting, so that the lithology, structure and configuration of the rock core can be further observed and researched more directly. It is easy to carry out high-resolution photographic, scanning, non-destructive test analysis and other scientific research work, while reducing weathering and fragmentation of the rock core after being influenced by the temperature, humidity and other natural factors for a long time.

Description

technical field [0001] The invention belongs to the technical field of core polishing and casting, and in particular relates to a method for long-term preservation of fragile cores. Background technique [0002] With the progress and development of human civilization, industry, technology and engineering construction, the exploration and exploration activities of mineral geology, hydrogeology, engineering geology, scientific geology, etc. are becoming more and more extensive. In various geological surveys and exploration activities, drilling is mainly used to collect cores below the surface for reference and analysis of the original geological state to achieve the purpose of scientifically developing geological resources. [0003] In actual operation, after the core is taken out from below the surface, due to the difference between the pressure and temperature of the formation below the surface and the surface, as well as the influence of other natural factors, the core is e...

AI Technical Summary

Problems solved by technology

After the disintegration, the core was blocky, with uneven shapes and sizes, which caused certain difficulties for subsequent cutting, observation and test analysis.

[0004] In the prior art, there are generally two methods for the preservation of fragile rock cores: one is natural storage, and the rock cores taken out from the bottom of the well are placed in an open plastic box without any sealing measures, and exposed to air with temperature and humidity changes for a long time , which increases the breakage and weathering of the core, resulting in the disintegration of the whole core, disordered rock blocks, unclear structure, and loss of scientific research significance; the second is a simple wax sealing method, wrapping the core with an opaque wax paper, and then dipping the whole in wax

This method has the effect of waterproofing and isolating the air, but it brings a lot of inconvenience to the observation or test analysis of the core. Every time the observation or test analysis of the core must be unpacked with wax seal, and the core must be re-wrapped with wax after observation, so it is time-consuming

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