Visualization device and method for multidirectional observation of hydrate generation and decomposition

Abstract

The invention relates to a visualization device and method for multidirectional observation of hydrate generation and decomposition. The visualization device comprises a low-temperature constant-temperature control system, a normal-pressure visualization reaction device, a temperature acquisition apparatus and a CCD imaging system, wherein the normal-pressure visualization reaction device comprises a temperature control circulating tank, a reaction tank, a circulating liquid inlet and a circulating liquid outlet; the reaction tank is arranged in the temperature control circulating tank; the tank wall of the temperature control circulating tank is communicated with the circulating liquid inlet and the circulating liquid outlet; a two-layer organic glass window is arranged on one side tank wall of the reaction tank, and comprises an observation window and an organic glass window in turn from inside to outside; the observation window and the organic glass window are both made of organic glass. According to the visualization device and method provided by the invention, the two-layer organic glass window is adopted, and is totally closed inside, air is dry, and the heat conductivity is low; the temperature of the outer-layer organic glass is close to room temperature, and the problem of water mist is solved.

Description

technical field [0001] The invention relates to a visualization device and method for multi-directional observation of hydrate formation and decomposition, and belongs to the technical field of oil and gas exploitation scientific research instruments. Background technique [0002] Gas hydrate is a solid crystal of water molecules in a cage structure. The structural cavities made up of water molecules are filled by small molecules that act to stabilize the crystal lattice. Small molecules include hydrocarbons with small relative molecular masses, such as methane, ethane, propane, as well as hydrogen and carbon dioxide. In the development of deep-water gas fields, the gathering and transportation pipeline generally adopts a mixed transportation process. There is free water in the pipeline, and at the same time, the pressure in the pipeline is high, and the temperature of the seabed environment is low, so hydrates are easily formed in the pipeline. The harm of hydrate is main...

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Problems solved by technology

However, this patent has the following defects: 1. Due to the low reaction temperature, the window is easily covered with a layer of water mist, which affects observation; 2. The reaction is carried out under low temperature and high pressure, and the conditions are not easy to control; 3. The hydrate formation cannot be observed in multiple directions and decomposition characteristics; 4. The equipment is relatively expensive and cannot be widely used in the research on the formation and decomposition characteristics of hydrates

However, the equipment is relatively expensive, and in order to achieve low temperature and high pressure reaction conditions, the device is more complicated and dangerous, and cannot be widely used in the research on the formation and decomposition characteristics of hydrates

In addition, the equipment uses CT scanning for three-dimensional imaging, so the observation of the growth and decomposition characteristics of hydrates is not clear enough

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