Hydrate generation, decomposition and blockage mechanism visual simulation device and method

Abstract

The invention discloses a hydrate generation, decomposition and blockage mechanism visual simulation device and method. a normal-pressure visual hydrate reaction system comprises a metal ball, a mounting frame, a metal detector and a transparent tube, the transparent tube is sealed and can contain hydrate slurry to be detected, the metal ball is arranged in the transparent tube, the transparent tube is mounted on the mounting frame, the metal detector used for detecting the metal ball is mounted on the mounting frame, the mounting frame and the transparent tube are arranged in a visual water bath, a driving system is connected with the mounting frame, a probe of a first temperature sensor is arranged in the transparent tube, a second temperature sensor is arranged in the visual water bath,and a CCD imaging system is arranged outside the visual water bath and is used for shooting the transparent tube. Real-time recording and analysis of hydrate generation, decomposition, aggregation and blockage and other processes under the normal pressure condition can be achieved, and effective evaluation of the hydrate anti-agglomerant under the normal pressure condition is achieved.

Description

Technical field [0001] The invention belongs to the field of oil and gas exploitation hydrate prevention and control research, and specifically relates to a visual simulation device and method for hydrate formation, decomposition and blockage mechanism. Background technique [0002] Gas hydrates generally refer to clathrate solid substances formed by gas molecules such as methane, ethane, propane, and carbon dioxide and water molecules in a low temperature and high pressure environment. In the hydrate structure, gas molecules are stably enclosed in cage-shaped cavities formed by water molecules. In the process of oil and natural gas drilling, exploitation, and gathering and transportation, the formation of hydrates will cause blockage of wellbore or pipelines, causing production operations to stop, and bring serious safety and environmental pollution risks. Traditional hydrate prevention and control are based on complete suppression strategies, including the addition of thermody...

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Problems solved by technology

High-pressure reactors and high-pressure swing tanks require equipment with harsh pressure resistance conditions, large investment in equipment, complex experimental operations, and high safety risks

Large-scale circulation devices are more complicated and take up a lot of space. A large amount of simulated liquid and chemicals are required for one test, and the input cost is relatively high.

Hydrate particle microscopic force measuring instrument (MMF) is often used to evaluate the performance of hydrate antipolymerization agent, but the microscopic force measuring instrument cannot test the antipolymerization effect of hydrate under the condition of fluid disturbance

In addition, differential scanning calorimetry (DSC) can also evaluate the effect of antipolymerization agents on the formation, decomposition and aggregation of hydrates in oil, methane and water systems under high pressure conditions, but DSC equipment is expensive, and maintenance and operation costs are high

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