US 11,946,345 B2
Natural gas hydrate exploitation experimental device and method for full-sized production wells
Xiaosen Li, Guangzhou (CN); Zhaoyang Chen, Guangzhou (CN); Yi Wang, Guangzhou (CN); Zhiming Xia, Guangzhou (CN); Gang Li, Guangzhou (CN); and Yu Zhang, Guangzhou (CN)
Assigned to GUANGZHOU INSTITUTE OF ENERGY CONVERSION, CHINESE ACADEMY OF SCIENCES, Guangzhou (CN)
Appl. No. 17/257,312
Filed by GUANGZHOU INSTITUTE OF ENERGY CONVERSION, CHINESE ACADEMY OF SCIENCES, Guangzhou (CN)
PCT Filed Sep. 8, 2020, PCT No. PCT/CN2020/114104
§ 371(c)(1), (2) Date Dec. 31, 2020,
PCT Pub. No. WO2021/159700, PCT Pub. Date Aug. 19, 2021.
Claims priority of application No. 202010784668.5 (CN), filed on Aug. 6, 2020.
Prior Publication US 2022/0298891 A1, Sep. 22, 2022
Int. Cl. G09B 23/40 (2006.01); E21B 41/00 (2006.01)
CPC E21B 41/0099 (2020.05) [G09B 23/40 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A device comprising a well; wherein the device is configured to be disposed in a reactor; the reactor comprises an upper cover, a lower cover, and a reactor body, and the upper cover and the lower cover are sealably attached to two ends of the reactor to form a closed chamber; the closed chamber is filled with porous medium and liquid; the well comprises an upper sealing unit and a lower sealing unit, and a heating circulation tube and a temperature sensor tube are disposed inside the well;
the upper sealing unit comprises an upper plug and an upper plug locking cap; the upper plug is sealingly inserted into an upper end of the well, and the upper plug is fixed by the upper plug locking cap; a gas discharging passage is provided penetrating the upper plug, wherein the gas discharging passage is configured to discharge methane gas;
the lower sealing unit comprises a lower plug and a lower plug locking cap; the lower plug is sealingly inserted into a lower end of the well, and the lower plug is fixed by the lower plug locking cap; an exploitation passage and a water discharging passage are provided penetrating the lower plug, wherein the exploitation passage is configured to discharge a gas-water-sand mixture, and the water discharging passage is configured to discharge water from the well to obtain a well fluid;
a first end of the heating circulation tube penetrates the upper plug, and the first end of the heating circulation tube is fixed at the upper plug; a second end of the heating circulation tube extends towards the lower end of the well until the second end of the heating circulation tube bends above the lower end of the well and then the second end of the heating circulation tube extends towards the upper end of the well; the heating circulation tube is configured to prevent hydrate formation inside the well;
a first end of the temperature sensor tube penetrates the upper plug, and the first end of the temperature sensor tube is fixed at the upper plug; a second end of the temperature sensor tube extends towards the lower end of the well; temperature sensors are provided inside the temperature sensor tube, wherein the temperature sensors are configured to obtain temperature data from an inside of the well;
perforations are provided along a body of the well; the perforations are configured to be closed during a hydrate formation process and be open to allow the gas-water-sand mixture to enter the well through the perforations, wherein each of the perforations is provided with a sand control unit.