A semi-cemented artificial core model and its sand filling device and method

Abstract

The invention relates to a semi-cemented artificial rock core model. The semi-cemented artificial rock core model is formed by a transparent organic glass tube, a quartz sand filling area at the middle portion, and sand grain cementing areas at two ends. A filling device of the semi-cemented artificial rock core model comprises a manual hydraulic pressure pump, a pressure release valve, a pressure meter, a fixed support, a solid threaded iron rod and a middle container with a stopper and an open end. The invention further provides a filling method of the semi-cemented artificial rock core model. The device and the method have the following advantages: 1, the making cost of the rock core is reduced, the technical threshold of making of the rock core is reduced, and the making efficiency of the rock core is improved; and 2, the aperture structure of the rock core is protected by the organic glass tube, so destroys of high confining pressure to the rock core and the change of the aperture structure are effectively avoided. The device has the advantages of simple structure, convenience in operation, high practicality and high simulation credibility, and the method is a novel rock core model making technology suitable for being promoted.

Description

technical field [0001] The invention relates to a semi-cemented artificial core model and a sand filling device and method thereof, belonging to the technical field of porous medium physical model construction. Background technique [0002] The artificial core model is a commonly used artificial porous media model in the field of petroleum engineering, which simulates the deposition process of sandstone. Sandstone is composed of sand grains of different properties, shapes, and sizes cemented by cement. The sand grains and cement form the rock skeleton, and the unfilled spaces between the skeletons form the pores. The artificial porous media model can effectively simulate the seepage law of oil, gas and water in porous media, and has the characteristics of low cost, simple method and high simulation reliability. In reservoir engineering, it is essential to use artificial cores for physical simulation experiments, which can provide important references for oil and gas field d...

AI Technical Summary

Problems solved by technology

①Choose plexiglass tube as the core shell, which greatly reduces the production cost, and also solves the problem of changing the core structure due to the high confining pressure of the core holder. The mature technical advantages of the core holder in displacement; ②The middle space of the core is filled with quartz sand, as the main part affecting the physical properties of the core, which overcomes the defects that the surface properties of the cemented core are changed by resin and is easily glued to death, and achieves full The purpose of simulating the sandstone in the oil reservoir; ③The two ends are cemented sand grains, which are compacted in the sand filling device, which completely avoids the problems of sand grain movement, sand plugging, sand leakage, and high permeability areas in the sand filling core.

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