Method for making microcosmic model of real rock core

Abstract

The invention belongs to the technical field of petroleum exploitation, in particular to an ultra-thin, high-definition real rock core micromodel manufacturing method and a grinding holder and an adhesive used in the microcosmic simulated oil displacement technology in the field of laboratory experiments in the petroleum industry to enhance oil recovery . Using the core grinding holder, filling and adhesive, the core slices are directly bonded between two layers of chrome glass, the production process is controlled, and the one-piece molding achieves high definition on the basis of maintaining the original shape of the real core pore structure. imaging. It is mainly used for indoor microcosmic simulation of oil displacement experiments in the petroleum industry, and is suitable for the study of seepage laws of underground fluids such as oil and gas in porous media.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, in particular to an ultra-thin, high-definition real rock core micromodel manufacturing method and a grinding holder and an adhesive used in the microcosmic simulated oil displacement technology in the field of laboratory experiments in the petroleum industry to enhance oil recovery . Background technique [0002] At present, there are two types of microcosmic models used in the field of microcosmic simulation of oil displacement technology in laboratory experiments of enhanced oil recovery in the petroleum industry. [0003] 1. Microscopic seepage simulation model (patent number: 00109777) [0004] This technology uses a photochemical etching process to precisely photoetch the pore structure of natural rock core slices onto flat optical glass, which is etched with hydrofluoric acid and then sintered at high temperature to form it. [0005] Main disadvantages: using hydrofluoric ...

AI Technical Summary

Problems solved by technology

[0005] Main disadvantages: using hydrofluoric acid etching technology, the minimum throat can only be controlled at 50-80 microns, the size of the pore throat is too large, and the degree of simulation is low. In addition, there are differences between glass and rock particles, which cannot simulate the original appearance of the core. The experimental results are convincing Poor strength

[0008] Main disadvantages: Although the original appearance of the real core is maintained, the thickness of the core slice is at the millimeter level. Under the microscope, the layer of rock particles is seriously superimposed, and the imaging resolution is low. The boundary between crude oil and rock particles is not clear, and it is impossible to clearly observe the pore-level oil displacement. the whole process

In addition, although the models all have good surface smoothness, the adhesive (epoxy resin) used to fix the rock slices affects its light transmission and reduces the imaging clarity

Although the latter makes up for the lack of core simulation of the former, it is far behind the former in terms of imaging clarity

Images