Experimental device and method for stability of tubular column in hydrate pilot production process

Abstract

The invention provides an experimental device and method for the stability of a tubular column in the hydrate pilot production process, and relates to the technical field of deep water hydrate exploitation. The experimental device comprises a hydrate preparation and exploitation simulation system, a hydrate exploitation well well mouth-multi-layer pipe system and a data acquisition and processingsystem. The hydrate preparation and exploitation simulation system is used for simulating collection of gas and / or liquid generated after decomposition in the depressurized decomposition process of hydrates. The hydrate exploitation well well mouth-multi-layer pipe system is used for simulating vertical loads and bending moment applied in the hydrate experimental process and simulating different working conditions. The data acquisition and processing system is used for monitoring and simulating data of the settling condition, and / or the inclination condition and / or the strain and stress changecondition in the decomposition process of the hydrates and carrying out analysis and processing. The scheme is used for evaluating the stability of the hydrate exploitation well well mouth-multi-layer pipe system under different exploitation working conditions, the relevant parameter change rule of the stability of a shaft in the hydrate exploitation process is disclosed with a method in which the simulation experimental device and a simulation experiment are combined, and great significance is achieved for next relevant value simulated analysis.

Description

technical field [0001] The invention relates to the technical field of deep-water hydrate mining, in particular to an experimental device and method for stability of a pipe string during a hydrate trial production process. Background technique [0002] With the sharp increase in the consumption of oil and gas resources, the development and utilization of new energy, especially clean energy, is the research direction of future energy. Natural gas hydrate is recognized as the most valuable alternative energy source for petroleum due to its advantages such as wide distribution, large amount of resources, high energy density, cleanliness and no pollution. However, compared with traditional oil and gas exploitation, marine hydrates are buried in deep water and shallow layers, and their operating environment is more complex, and considering that the stability of hydrates is greatly affected by changes in temperature and pressure, how to avoid damage caused by hydrate exploitation?...

AI Technical Summary

Problems solved by technology

However, compared with traditional oil and gas exploitation, marine hydrates are buried in deep water and shallow layers, and their operating environment is more complex, and considering that the stability of hydrates is greatly affected by changes in temperature and pressure, how to avoid damage caused by hydrate exploitation? A series of hazards such as landslides, eruptions, seabed subsidence, wellhead instability, and damage to underwater production systems have become important factors restricting the commercial production of hydrates.

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