Simulation method of oil and gas mixed transportation pipeline installation and hydrate formation, blockage and ablation

Abstract

The invention discloses an oil-gas mixed transportation pipeline device and a simulating method for hydrate formation, blockage and ablation, comprising a reactor I and a reactor II, both of which are connected to the same gas supply system, and react There is a grouting port on the kettle I, and the top and bottom of the reactor II are connected through a circulation pipeline, and a liquid injection port is provided on the circulation pipeline; both the reactor I and the reactor II are equipped with temperature regulators to adjust their temperature. A control device, and a detection device for detecting the reaction state of natural gas hydrate in the pipeline is installed on the circulation pipeline, the detection device is connected with the data processing system, and the detection device is connected with the data processing system. The measure of the present invention for the high-risk blockage state has a very good effect on controlling the loss of long-term stoppage of pipeline due to blockage.

Description

technical field [0001] The invention belongs to the technical field of pipeline safety control, and in particular relates to an oil-gas mixed transportation pipeline device and a simulation method for hydrate formation, blockage and ablation. Background technique [0002] Natural gas hydrate is a non-stoichiometric cage-like crystal substance formed by water and small molecular gases such as methane, ethane, carbon dioxide and hydrogen sulfide. During oil and gas extraction and transportation, due to high pressure and low temperature conditions, natural gas hydrates are easily formed to block pipelines and hinder normal production. Since the Soviet Union first discovered hydrate ice blockage in natural gas pipelines in 1934, with the continuous development of oil and gas resources to the deep water field, various problems caused by hydrates have gradually become a research hotspot in the field of oil industry flow security. Among them, the research on the prevention and con...

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Problems solved by technology

[0010] (1) The above patents can study the formation process of hydrate in the pipeline and the flow characteristics after hydrate formation, but cannot effectively analyze and study the clogging process and mechanism of hydrate in the pipeline

[0011] (2) The above patents are mainly used to study the prevention and generation process of hydrates in the pipeline, and cannot effectively study the decomposition processes of hydrates such as heating, depressurization, and injection after the formation of hydrates in the pipeline or after the pipeline is blocked.

[0012] (3) All the above patents can be used to study the blockage removal technology of hydrate in the pipeline, but the method used cannot consider the formation process of hydrate, and a single method is used for the blockage removal of hydrate

[0013] (4) The above patents are mainly used to study the plugging removal process of hydrates in the pipeline, and do not consider in detail the different states of hydrates after they are generated. The methods used are also uniform, which makes the effect of the plugging removal method not ideal

[0014] In short, the above patents are not comprehensive in the research on the entire process of hydrate formation, flow, blockage and decomposition in the pipeline. Therefore, the present invention designs an experimental device and a A comprehensive method capable of unblocking hydrate plugging according to its formation stage

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