One-dimensional simulation device for development simulation experiment apparatus of natural gas hydrate

Abstract

The invention discloses a one-dimensional simulation device of a development simulation experiment apparatus for natural gas hydrate. The device comprises a core simulation cavity and a displacement pressure supply chamber. High-pressure bushings are arranged on the inner wall of the core simulation cavity. The interior of the core simulation cavity is divided into a displacement chamber and a pneumatic pressure floating chamber through a floating inner piston. A core holder is installed inside the displacement chamber through a compensating core barrel. An open temperature maintenance deviceand a pneumatic pressure compensation device are arranged on side surfaces of the displacement chamber and the pneumatic pressure floating chamber respectively. Two pressure control tubes are arrangedat the top of the displacement chamber and are provided with compression valves and extension valves respectively. A damping tube is arranged between the two pressure control tubes. According to theone-dimensional simulation device of the development simulation experiment apparatus of the natural gas hydrate, more intuitive data is obtained through test, and through the open temperature controland the self-pressure adjustment, the temperature and pressure are always in a dynamic balance when passing a model test, so that the actual environment can be better simulated, and the testing effectis more accurate.

Description

technical field [0001] The invention relates to the technical field of hydrate simulation devices, in particular to a one-dimensional simulation device of a natural gas hydrate development simulation experiment device. Background technique [0002] Considerable reserves promote the continuous progress of development technology, and technological innovation will drive the efficient development of reserves. Since this century, the whole world has recognized that natural gas hydrate is a clean energy alternative to conventional fossil fuels. More than 200 hydrate deposits have been discovered in the world. Based on the current energy consumption trend, only 15% of hydrate mining can be used globally for 200 years. However, the stable temperature and pressure conditions formed by itself determine the particularity of its mining method. In addition, the impact of its mining process on the environment needs further evaluation. Therefore, most of the current research on hydrate m...

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Problems solved by technology

[0008] (1) Existing simulation devices cannot construct specific stratum structures based on actual geological data, or simulate the actual environment through stratum structures. Because this process is difficult to simulate effectively, the simulation effect is different from the actual results. Inconsistencies or obvious differences lead to simulation results that cannot be directly used to guide actual production, but can only be used as an auxiliary basis for theoretical guidance;

[0009] (2) Existing simulation devices are often closed, and the simulated conditions are limited to the model body, and all its parameters and simulation conditions cannot be combined to form a dynamic equilibrium, which cannot simulate hydrate The dynamic environment, especially in the process of mining, the environment in which it is located is in the process of establishing balance and destroying balance, so it is impossible to simulate the dynamic mining process;

[0010] (3) In the existing simulation device, there is a fixed structure between the model body and the base, but this fixed structure limits the scope of application of the model, that is, for a model, what is preset to simulate Well patterns of different types can only simulate this type and cannot exceed this range, which is obviously unscientific

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