Rock sample polishing method and device

Abstract

The application discloses a rock sample polishing method and device. The rock sample polishing device includes a housing; a placement table, the placement table is arranged in the housing, the placement table can move relative to the housing, and the rock sample can be placed on the placement table; a laser assembly, the laser assembly is arranged in the housing, and the laser assembly The laser can be emitted to the surface of the rock sample; the gas device is arranged in the casing for blowing gas to the rock sample; the roughness detection device is arranged in the casing and adapted to the sample stage, and is used for detecting the roughness of the rock sample surface Spend. The polishing device of the rock sample is polished by laser heating, which is different from the contact grinding and polishing method in which water and polishing agent are used as the medium in the polishing process of the current technology. The integrity of the rock sample is guaranteed.

Description

technical field [0001] The invention relates to the field of geological exploration, in particular to a polishing method and device for rock samples. Background technique [0002] Scanning electron microscopy is used in the field of geological exploration. For example, scanning electron microscopy can be used for observation and analysis of micropores in rock samples; composition and occurrence of reservoir pores; distribution and structure of cement; precipitation and regrowth of microcrystals, etc. [0003] Before the rock samples can be scanned by the electron microscope, the cut rocks need to be polished. In the prior art, the polishing method using water as the medium is mostly used for rock samples. The polishing process of this polishing method is longer. Under the action of water for a long time, the surface pore fillers and clay minerals of rock samples are likely to be destroyed. For example, a large amount of water may lead to macroscopic phenomena such as wat...

AI Technical Summary

Problems solved by technology

Furthermore, under the condition of no confining pressure in the laboratory, there may be micro-cracks caused by the expansion of clay minerals due to water absorption

The above changes in microstructure may not be clearly observed in conventional rock analysis such as thin section analysis, but in the field emission scanning electron microscope imaging observation, the above phenomenon becomes very obvious, resulting in large errors in the observation and quantification of the sample pores or Fallacy, which has a great influence on the experimental phenomenon and experimental results

[0004] In addition, for clastic rocks such as fine-grained sandstone and tight sandstone, due to the poor cementation between the mineral particles of this type of rock and the small bonding force between particles, it is easy for particles to be removed from the surface during the mechanical polishing process using water. Phenomena such as plane prolapse, artificially cause large holes, such samples will cause the illusion of pores when observed, resulting in errors in calculation results

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