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An early warning method for simulating hydrate blockage in submarine gas pipeline transportation

A technology for gas transmission pipelines and submarine pipelines, which is applied to pipe elements, pipes/pipe joints/pipes fittings, instruments, etc., can solve problems such as affecting the efficiency of oil and gas production, blocking pipelines by natural gas hydrates, and unable to obtain real-time images of hydrates. Achieve the effect of reducing transportation risk and improving the overall safety prediction of submarine pipeline flow

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

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 current flow safety evaluation cannot achieve the overall observation of the blockage state of natural gas hydrate in the pipeline, nor can it obtain real-time images of the blockage process of hydrate formation, and cannot provide a basis for solving flow safety problems in the process of submarine oil and gas pipeline transportation. Basic data

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  • An early warning method for simulating hydrate blockage in submarine gas pipeline transportation
  • An early warning method for simulating hydrate blockage in submarine gas pipeline transportation
  • An early warning method for simulating hydrate blockage in submarine gas pipeline transportation

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Embodiment Construction

[0038] figure 1An early warning system for submarine oil and gas pipeline transportation based on the hydrate effect is shown, and the system includes a collection module, a hydrate generation module, a hydraulic diameter module, a heat transfer module, a pressure module and an early warning module.

[0039] Acquisition module: collect basic information of all pipelines in the area, basic information includes pipeline inner diameter, pipeline outer diameter, pipeline length, pipeline material, ambient temperature, fluid temperature, fluid flow rate, fluid inlet pressure, inhibitor type and concentration or volume ratio , The proportion of moisture content.

[0040] Hydrate generation module: Based on the subcooling degree of the submarine pipeline system and the gas-water interface area, the first-order kinetic equation of hydrate generation is used to obtain the total hydrate generation amount of the system; based on physical conditions, the hydrate generation amount cannot b...

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Abstract

The invention relates to an early warning method for simulating hydrate blockage of submarine gas pipeline transportation, which belongs to the technical field of pipeline flow safety. This method simulates the physical and chemical changes in the flow process of submarine pipelines, reveals the influence of hydrate generation, transportation, and deposition in submarine pipelines on pipeline flow safety, and takes hydrate into consideration in pipeline flow safety, in order to determine the blockage of submarine pipelines. It is of practical and scientific significance to provide reference and better provide technical support for sea area gas pipeline transportation. The invention preliminarily predicts the generation of hydrate in the submarine pipeline, and provides data and evaluation for the flow safety of the submarine oil and gas transportation, realizes low cost, wide coverage and high efficiency, and improves the safety of the submarine natural gas transportation.

Description

technical field [0001] The invention relates to an early warning method for simulating hydrate blockage for submarine gas pipeline transportation, and belongs to the technical field of oil and gas pipeline early warning. 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 current flow safety evaluation cannot achieve the overall observation of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/28F16L55/24G06F119/14G06F113/14
CPCG06F30/28F16L55/24G06F2119/14G06F2113/14
Inventor 王大勇李孟昕陈天宇沙婕宋永臣王启林贾靖冬王子明
Owner DALIAN UNIV OF TECH
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