A method and device for preparing an artificial core

Abstract

The present invention provides a method and device for preparing an artificial rock core, the method comprising: constructing the primary structure of the core pores by 3D printing technology, which characterizes and describes the contour shape of the core pores; coating a shape-defining layer on the primary structure, It is used to increase the strength of the primary structure so that it maintains a stable shape; solid embedding is performed outside the primary structure forming a shape-defining layer to form a core sample; heat treatment is performed on the core sample to vaporize and volatilize the material of the primary structure , forming a porous medium core model with internal pore microstructure; performing a chemical corrosion process on the porous medium core model to ablate the shape-defining layer on the inner wall of the porous medium core model; cutting the porous medium core model to obtain an artificial core with internal pore structure . The artificial rock core prepared by using the embodiment of the present invention has a relatively smooth and accurate internal pore structure, and the requirement for the preparation material is relatively low, which is easy to realize.

Description

technical field [0001] The invention relates to the field of petroleum geology, in particular to a method and device for preparing artificial rock cores. Background technique [0002] The statements in this section only provide background information related to the present disclosure and may not constitute prior art. [0003] Understanding and mastering geological microscopic pore structure, microscopic flow mechanism and law has great scientific guiding significance for the development of tight oil and gas reservoirs. To this end, multiple destructive experimental analyzes of the cores are required. [0004] However, the actual cores need to invest tens of millions of dollars in drilling to take them out from the ground, and the quantity is very limited. In addition, rock cores are natural samples "prepared" by nature, and their mineral composition and pore structure are very complex. Each core is different, and it is impossible to find the same batch of cores with simil...

AI Technical Summary

Problems solved by technology

[0007] The printing consumables currently used in the above-mentioned known embodiments are mostly limited to materials with poor temperature and pressure resistance, such as resin, or mineral particles or mineral powder slurry

Therefore, when using materials with poor temperature and pressure resistance as printing consumables, the artificial rock cores cannot be used in the physical simulation environment of high temperature and high pressure, which leads to a limited range of application of the artificial rock cores prepared by the above known embodiments. big limit

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