A multifunctional artificial core preparation instrument

Abstract

The invention provides a multifunctional artificial core preparation instrument at least comprising a compact model cylinder and a high-temperature high-pressure pump communicated with the compact model cylinder, wherein the compact model cylinder is arranged in a constant-temperature box. The compact model cylinder comprises a cavity A, a cavity B, a connecting block, a pressing rod, a pressing cap A, a pressing cap B and two pistons, wherein the cavity A and the cavity B are connected through the connecting block, a through hole is formed at the center of the connecting block, the side face of the connecting block is provided with an air inlet hole and an air outlet hole which are communicated with the cavity B, the air inlet hole is communicated with an air compressor, the pressing rod penetrates through the through hole of the connecting block, the two ends of the pressing rod are connected with the two pistons respectively, the cavity A is sealed through the pressing cap A which is installed at the end of the cavity A and provided with a liquid outlet hole, and the cavity B is sealed through the pressing cap B which is installed at the end of the cavity B and provided with an oil inlet hole and an oil outlet hole. According to the multifunctional artificial core preparation instrument, the compaction pressure can reach 150 MPa, the work temperature can reach 150 DEG C, the multifunctional artificial core preparation instrument can continuously work for over 120 h at the temperature of 120-150 DEG C, and the warm-pressing system of a stratum under the real condition can be simulated.

Description

technical field [0001] The invention relates to the technical field of making artificial rock cores for experimental research, in particular to an artificial rock core preparation device. Background technique [0002] Artificial cores, especially large-scale artificial cores, are the basic medium for the study of reservoir seepage law, perforation, acid fracturing evaluation, etc., and core compaction equipment is essential for the preparation of artificial cores. [0003] The existing artificial rock cores are mostly made of artificial glue materials bonded at high temperature, which cannot reflect the influence of factors such as porous structure, clay mineral expansion, micro-cracks and other factors on the seepage law in real rock cores. To make the artificial core conform to the structural characteristics of the real core, it is necessary to avoid the use of artificial glue and simulate the diagenetic process of formation high temperature, high pressure and long compact...

AI Technical Summary

Problems solved by technology

[0004] At present, most of the existing artificial core compaction equipment uses hydraulic cylinders to drive piston rods to compact core materials, such as the utility model patent (CN201220550483) simple artificial core preparation device, which presses down through the hydraulic cylinder and acts on the core of the core plunger. The plunger compacts the core material. This device has a simple structure and is easy to operate, but the compaction pressure provided is small. It can prepare artificial cores using artificial rubber materials. However, for materials that do not contain artificial rubber materials and require high temperature and high pressure conditions Artificial cores are difficult to meet the requirements of use; the pressing temperature and pressure required in the core pressing process change in steps, and the existing artificial core preparation equipment is difficult to achieve variable temperature and pressure pressing, and cannot be used to simulate high temperature, high pressure, and long time pressing in the formation. actual diagenesis

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