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Early warning method for simulating hydrate-blocked submarine gas pipeline transportation

A technology for gas transmission pipelines and submarine pipelines, applied to pipe components, pipes/pipe joints/fittings, instruments, etc., can solve problems affecting oil and gas production efficiency, natural gas hydrate blocking pipelines, and inability to obtain real-time images of hydrates, etc. Achieve the effect of improving the overall safety prediction of submarine pipeline flow and reducing transportation risks

Active Publication Date: 2021-05-14
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

Method used

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  • Early warning method for simulating hydrate-blocked submarine gas pipeline transportation
  • Early warning method for simulating hydrate-blocked submarine gas pipeline transportation
  • Early warning method for simulating hydrate-blocked submarine gas pipeline transportation

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Experimental program
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Embodiment Construction

[0039] figure 1 An 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.

[0040] 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 , Moisture content ratio.

[0041] 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 be negative v...

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Abstract

The invention discloses an early warning method for simulating hydrate-blocked submarine gas pipeline transportation, and belongs to the technical field of pipeline flow safety. According to the method, physical and chemical changes in the flowing process of a submarine conveying pipeline are simulated, influence of generation, transportation and deposition of hydrates in the submarine pipeline on the pipeline flowing safety is revealed, the hydrates are considered in the pipeline flowing safety, reference is provided for submarine pipeline blockage judgment, technical support is better provided for sea area gas conveying pipeline transportation, and the method has practical and scientific significance. The submarine pipeline hydrate generation is preliminarily predicted, data and evaluation are provided for the flowing safety problem of submarine oil and gas transportation, the implementation cost is low, the coverage is wide, the efficiency is high, and the submarine natural gas transportation safety is improved.

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 Applications(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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