A high-temperature core clamping device and its experimental method

Abstract

The invention discloses a high-temperature rock core clamping device, which comprises a shell, a test core and a core clamping mechanism. The bottom end of the shell is closed and the top end is open. Caps, inlet joints, outlet joints and metal sealing sleeves for wrapping test cores, end caps and pressure caps are set on the top of the shell, metal sealing sleeves are placed in the inner cavity of the shell, and test cores are placed in metal seals. In the casing, after the inlet joint passes through the end cap, the bottom end of the inlet joint is placed in the upper part of the metal sealing sleeve, the top of the inlet joint is located above the end cap pressing cap, and the top end of the outlet joint is placed in the metal sealing sleeve. lower part. The present invention also provides an experiment method using the above-mentioned high-temperature rock core clamping device. The invention can simulate the working condition of the formation, test the seepage and strain characteristics of the rock core, and know the action ability of the downhole operation on the formation in time.

Description

technical field [0001] The invention belongs to the technical field of oil and gas exploration, and in particular relates to a high-temperature rock core clamping device and an experimental method thereof. Background technique [0002] With the in-depth development of oil drilling technology, there are more and more deep wells and ultra-deep wells. Generally, with the increase of well depth, the pressure and temperature of the formation will increase, and the downhole situation is complicated, which puts forward higher requirements for oil drilling technology. This requires simulating downhole working conditions on the ground, simulating and analyzing the cores taken out of the downhole, knowing the properties of the formation in a timely manner, and providing a basis for formulating oil drilling plans. [0003] In order to simulate the continuous change of reservoir physical parameters under compaction during the actual formation burial and diagenesis, the simulation exper...

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Problems solved by technology

The entire clamping device and its internal components are cylinders. The most important thing in the experiment is the force problem. Since the fluid or gas is mostly added from the inlet in the experiment, the core clamping device bears a large force, which is easy to clamp the core. At the same time, the high temperature resistance and corrosion resistance of the existing rock core holding device are poor, thus affecting the determination of the experimental index. When the rock core holding device is working, high temperature and high pressure are required, so for its sealing The performance puts forward high requirements, and the compaction process of modern sediment samples needs to be carefully observed during the experiment, so a clamping device with uniform force, high temperature resistance, corrosion resistance and good sealing is required

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