Device and method capable of generating natural gas hydrate through confining pressure and transferring and decomposing under pressure maintaining

Abstract

The invention discloses a device and a method capable of generating natural gas hydrate by confining pressure and carrying out pressure-maintaining transfer decomposition. The device comprises a reaction kettle capable of simulating natural gas hydrate generation and pressure maintaining transfer under the stratum confining pressure condition, the bottom of the reaction kettle is connected with asecond two-way hydraulic cylinder, a pressure maintaining ball valve with the same drift diameter as the inner diameter of the kettle is arranged at the top end of the reaction kettle, and the other end of the pressure maintaining ball valve is connected with a first two-way hydraulic cylinder; the first bidirectional hydraulic cylinder and the second bidirectional hydraulic cylinder are respectively connected with a hydraulic station; and the reaction kettle is fixed on a support capable of rotating up and down at 180 degrees. The device can be used for simulating and generating the natural gas hydrate under the stratum confining pressure condition, pressure maintaining transfer of the natural gas hydrate is achieved, decomposition visualization of the natural gas hydrate is achieved, andmore real, more comprehensive and lower-cost guidance is provided for decomposition research of the natural gas hydrate.

Description

technical field [0001] The invention belongs to the technical field of basic physical property measurement of unconventional oil and gas reservoir engineering and geotechnical engineering, and specifically relates to a device and method capable of forming natural gas hydrate under confining pressure and transferring and decomposing under pressure. Background technique [0002] In May 2017, the trial production of natural gas hydrate in the Shenhu area of ​​the South my country Sea was successful, and the exploitation of natural gas hydrate entered a new chapter. my country's South China Sea and the Qinghai-Tibet Plateau are rich in natural gas hydrate resources, which will provide a strong guarantee for my country's future energy development. On November 3 of the same year, the State Council officially approved the listing of natural gas hydrate as a new mineral. [0003] However, the sediment reservoirs containing gas hydrates are deep, and their structures and environment...

AI Technical Summary

Problems solved by technology

The former monitors less information and cannot reflect the decomposition of natural gas hydrate well. The latter requires a large investment and has certain restrictions on the size and formation conditions of natural gas hydrate (confining pressure, pressure).

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