Corestone manufacture method

Abstract

The invention relates to a corestone manufacture method, which comprises the following steps: (1) mold manufacture; (2) material preparation; (3) sand mixing; (4) molding; (5) pressurization; (6) electrode wire and pressure measuring pipe pre-burying in the corestone; (7) heating; (8) electrode lengthening wire welding; and (9) sealing. Compared with a physical model used at present, the invention has the advantages that indoor oil displacement experiments can be carried out under the condition of high pressure, the in-site production conditions can be simulated more accurately, oil-water distribution charts inside the model can be drawn more accurately, the oil-containing saturation change inside the corestone can be tracked in time, and the invention provides the scientific basis for the establishment of the development scheme.

Description

Technical field: [0001] The invention relates to a method for making rock cores in the field of oil recovery in oil fields. Background technique: [0002] In the research of oilfield development technology, many evaluation works are inseparable from core flow experiments. At present, when various domestic research institutions conduct core experiments, due to the limitation of natural core sources, except for a small amount of natural cores, most of them use artificial cores. There are three commonly used methods for making artificial cores: quartz filling, aluminum phosphate quartz sintering, and epoxy resin cementing. From the perspective of the similarity between the pore structure of the core and the natural core, the ease and repeatability of core production, the epoxy resin cemented pressing method has greater advantages. [0003] The main factors affecting the physical parameters of artificial cores, such as permeability, porosity, and median pore radius, are sand t...

AI Technical Summary

Problems solved by technology

The production of artificial cores with different physical parameters is generally achieved by changing the types or levels of the above factors. However, because the primary and secondary relationships between these factors are still based on perceptual knowledge, the level adjustment is often blind to a certain extent, which is different from the need for a large number of different infiltration The current situation of conducting scientific experiments on cores is very incompatible

[0004] In addition, the artificial rock core used in the physical simulation oil displacement test can only be carried out under normal pressure, and the distribution of oil and water inside the core cannot be observed, which brings inconvenience to the test and analysis work

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