Seabed superficial hydrate exploiting apparatus and exploiting method thereof

Abstract

The invention discloses a seabed superficial hydrate exploiting apparatus and an exploiting method thereof and relates to the technical field of unconventional oil-gas reservoir development engineering. A seabed mining vehicle is controlled from a vessel; the seabed mining vehicle exploits hydrates and deposit from the seabed, discharges water and performs crushing; the seabed mining vehicle is then lifted to the seawater superficial layer for heating. The seabed superficial hydrate exploiting apparatus and the exploiting method thereof have the advantages that hydrates are decomposed in a hydrate decomposition station in the seawater superficial layer, the superficial layer close to the sea level features low pressure and high temperature as compared to the seabed environment and has theunique temperature and pressure conditions for the decomposition of hydrates, and auxiliary heat is supplied to promote decomposition rate of the hydrates; the apparatus herein has the modules, such as a seabed self-traveling functional module and a multi-angle multi-directional exploiting technique module; the decomposed hydrate deposit is backfilled to a gob, geological disasters, such as landslide, can be effectively avoided, single-line operation speed is high, operation time is short, and the influence of hydrate decomposition upon the marine environment and marine lives is effectively avoided.

Description

technical field [0001] The invention relates to the technical field of unconventional oil and gas reservoir development engineering, in particular to a seabed shallow surface hydrate exploitation device and a exploitation method thereof. Background technique [0002] Natural gas hydrate is a kind of energy resource with great potential. It is widely distributed in oceans and permafrost around the world. In my country, hydrates have also been found in the seabed of the South China Sea and the permafrost of Qilian Mountains. [0003] Due to the unique physical and chemical properties of hydrate itself and the variable dynamic characteristics in different environments, various geological and landform types will appear on the seabed during the formation, migration and decomposition of hydrate. The survey found that seabed landforms such as seabed pockmarks, submarine mud volcanoes, cold springs, and hydrate mounds are closely related to hydrates, which are favorable geological e...

AI Technical Summary

Problems solved by technology

[0004] As far as massive hydrates occur in shallow surface mud volcanoes, pits, and hydrate mounds in the sea area, no efficient and authoritative mining device has been invented yet

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