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An early warning method for hydrate blockage in simulated circulation submarine pipelines

A technology for submarine pipelines and hydrates, which is used in forecasting, instrumentation, data processing applications, etc., can solve problems such as inability to obtain submarine pipelines, and achieve the effect of improving overall flow safety prediction and reducing transportation risks.

Active Publication Date: 2022-04-01
DALIAN UNIV OF TECH
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Problems solved by technology

[0004] The current flow safety assessment cannot obtain real-time images of the hydrate formation blockage process in the submarine pipeline, and there is currently no solution for the flow safety problem in the submarine gas pipeline transportation process under the influence of different concentrations of thermodynamic inhibitors

Method used

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  • An early warning method for hydrate blockage in simulated circulation submarine pipelines
  • An early warning method for hydrate blockage in simulated circulation submarine pipelines
  • An early warning method for hydrate blockage in simulated circulation submarine pipelines

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Embodiment Construction

[0050] figure 1 and figure 2 A flow chart of the early warning method is shown, and the method includes the following steps:

[0051] S1. Collect the basic information of all pipelines in the area, including pipeline inner diameter, pipeline outer diameter, pipeline length, pipeline material, ambient temperature, inhibitor type, inhibitor concentration, fluid temperature, fluid inlet pressure, etc. The hydrate equilibrium triple point is obtained by inputting parameters, fluid pressure and fluid temperature at the inlet of the submarine gas pipeline;

[0052] S2. According to the type of inhibitor and the concentration of the inhibitor, call the corresponding model from the preset system to obtain the activity of the water in the submarine pipeline system, thereby calculating the degree of supercooling;

[0053] S3. Based on the subcooling degree of the pipeline system, the amount of hydrate formation is calculated through the first-order kinetic formula of hydrate formatio...

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Abstract

The invention relates to an early warning method for hydrate blockage of a simulated circulation submarine pipeline, which belongs to the technical field of pipeline flow safety. This method includes hydrate formation, transportation and deposition processes and the influence of inhibitors on water activity on hydrate formation; it realizes the prediction of regional subsea gas pipeline blockage risk under the action of different types and different concentrations of inhibitors , which provides a solution for the existing regional subsea gas pipeline flow safety risk prediction and assessment; this method can not only predict the overall level of the subsea pipeline in the region, but also accurately deal with each section of the subsea pipeline with different risks , reduce the risk of submarine pipeline transportation, and turn the passive monitoring and processing of the flow safety of submarine gas pipelines into active prediction and response. The method can judge the flow safety of the submarine pipeline, has the characteristics of low cost, wide coverage and high efficiency, provides data and evaluation for flow safety issues, and improves the safety of submarine natural gas transportation.

Description

technical field [0001] The invention belongs to the technical field of submarine gas pipeline early warning, and in particular relates to a flow safety early warning method and system for a hydrate submarine gas pipeline containing an inhibitor. Background technique [0002] As a clathrate compound, natural gas hydrate is a solid compound formed by methane gas and water under low temperature and high pressure conditions. In the process of oil and gas exploitation and transportation, especially the low temperature and high pressure in the deep water environment is more conducive to the formation of hydrates. However, if the natural gas hydrates cannot be disposed of on site and block the pipeline, the oil and gas recovery efficiency will be seriously affected. Therefore, the pipeline Research on the flow safety problems caused by hydrate blockage in the road is the basic guarantee for solving the above problems. [0003] The inhibitors used in this simulation are mainly for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F30/28G06Q10/04G06Q50/06G06F113/08G06F119/08G06F119/14
CPCG06F30/20G06F30/28G06Q10/04G06Q50/06G06F2113/08G06F2119/14G06F2119/08
Inventor 王大勇陈天宇李孟昕沙婕宋永臣郑展鹏赵良黄雪华
Owner DALIAN UNIV OF TECH
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