Combustible ice mining stratum instability mechanism simulation test device and use method thereof

Abstract

The invention discloses a combustible ice mining stratum instability mechanism simulation test device and a use method thereof. According to the combustible ice mining stratum instability mechanism simulation test device and the use method thereof, a deep sea natural gas hydrate mining stratum instability mechanism simulation test device is combined with a supply part and a discharging part, so that the deep sea natural gas hydrate mining process is effectively simulated, the whole process of deformation and instability of the hydrate reservoir is clearly recorded through a data collecting and processing assembly, so that the mechanism of deformation and instability of the hydrate reservoir can be effectively revealed, deep reasons influencing deformation and instability in the hydrate stratum exploitation process are analyzed, a seabed stratum deformation control method in the current deep sea natural gas hydrate exploitation process and enlightenment on hydrate well treatment are discussed, reference is provided for follow-up research and engineering application, the device has the advantages of being simple in structure, convenient to disassemble, low in cost and capable of visualizing the stratum deformation and instability process. The method has wide popularization and application values in the technical field.

Description

technical field [0001] The invention relates to the technical fields of petroleum and natural gas and ecological environment, in particular to a simulation test device for formation instability mechanism in combustible ice mining and a use method thereof. Background technique [0002] Natural gas hydrate, commonly known as combustible ice, is an ice-like cage-like crystalline compound formed by natural gas and water under low temperature and high pressure conditions. It is widely distributed in deep-water formations such as high-latitude polar permafrost and ocean lakes. It has reserves Large and high energy density, it is considered as a potential energy source with great strategic significance. [0003] Hydrate-bearing sediments in the ocean are actually a mixture system of hydrate-formation water-sediments coexisting under certain pressure and temperature; The process actually breaks the existing mechanical balance, which will inevitably lead to a series of engineering g...

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Problems solved by technology

Hydrates in the South China Sea are filled in the pores of muddy sediments in a dispersed or weakly cemented manner, which may cause formation subsidence and deformation or seabed formation slip during the process of hydrate decomposition, which seriously restricts the production efficiency of deep-sea gas hydrates. Increase its mining cost and affect its commercialization process

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