A marine natural gas hydrate reservoir remodeling and exploitation device

Abstract

The invention belongs to the technical field of marine hydrate sample simulation and provides a marine natural gas hydrate reservoir remodeling and exploitation device. The device includes overburden pressure control system, hydrate production system, hydrate storage system, gas supply system, water supply system, temperature control system, and data acquisition system. The cap rock movement of different water depths is used to simulate the force of different water depths on the hydrate reservoir; the second guiding screw in the hydrate production system drives the wellbore to move up and down to adjust the penetration depth of the wellbore, which can simulate different production well heights and Avoid the phenomenon of hydrate growing along the wellbore; by changing the pore structure of the surrounding formation, the surrounding formation with different permeability can be simulated. The invention can effectively and accurately simulate the real occurrence conditions of hydrate reservoirs, and provide theoretical and experimental support for the actual exploitation of natural gas hydrates.

Description

technical field [0001] The invention belongs to the technical field of marine hydrate sample simulation, and more specifically relates to a marine natural gas hydrate reservoir remodeling and exploitation device. Background technique [0002] Natural gas hydrate is a new type of high-efficiency clean energy with wide distribution, large scale and high energy density. It is an important natural gas resource that can be commercially developed in the future. It is mainly stored in seabed sediments and permafrost. However, marine gas hydrates are different from conventional oil and gas resources. They form solid-state reservoirs and have complex conditions. They are generally distributed in marine sediments hundreds of meters below the seabed, and have the characteristics of high pressure and low permeability. [0003] At this stage, due to the difficulty in the exploitation of marine gas hydrates, the complete exploitation technology is not yet mature, and a large number of lab...

AI Technical Summary

Problems solved by technology

At present, most of the natural gas hydrate simulation systems owned by the vast majority of hydrate laboratories in the world are just simple pressure vessels, which cannot reflect the actual occurrence environment of the seabed more realistically, and are not true to the occurrence state of marine gas hydrate. simulation

In addition, before simulating the decomposition process of natural gas hydrate in the laboratory, it is inevitable to pre-generate natural gas hydrate in the reaction vessel. Wellbore growth, resulting in uneven gas hydrate formation

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