Experimental simulation device and method for exploiting natural gas hydrate
A technology of experimental simulation and hydrate, which is applied in the direction of mining fluid, gas fuel, earth drilling, etc., can solve the problems of low replacement efficiency, slow replacement rate, hydrate decomposition, etc., and achieve low cost, prevention of decomposition, and easy operation Effect
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Embodiment 1
[0038] like figure 1 As shown in the figure, an experimental simulation device for exploiting natural gas hydrate includes a regulated gas supply and liquid supply module, a reactor 8, a control module, a data measurement module, and a data acquisition and processing module, wherein:
[0039] The reactor 8 includes a kettle body 48, a piston 37 that is sealingly matched with the inner wall of the kettle body 48 and can move up and down, a kettle cover 47 connected to the top of the kettle body 48, and a bracket 12 that supports the bottom of the kettle body 48. The kettle cover 47 is provided with a pressure detection interface 44, a gas inlet and outlet 45, and a temperature detection interface 46 that can be connected to the inner cavity of the kettle body 48. The inner cavity of the kettle body 48 is provided with a microporous filter 35 at one end close to the kettle cover 47. , to achieve uniform distribution of pressure, a temperature sensor 38 and a one-way valve 36 a...
Embodiment 2
[0047] A method for exploiting natural gas hydrate, comprising the steps of:
[0048] (1) generate hydrate: place the piston 37 at the bottom of the reactor 8, add a certain amount of sodium dodecyl sulfate solution in the reactor 8, vacuumize, open the fourth valve 21, the seventh valve 30, go to Reactor 8 is filled with CH 4 To the pressure of 4MPa, adjust the temperature of the constant temperature tank 4, under the conditions of the temperature of 1°C and the pressure of 4MPa, the reaction time is 100h to generate hydrate;
[0049] (2)CO 2 Reserve: When hydrate is formed, close the first valve 7, put the CO 2 The gas is charged into the buffer tank 5, the volume of the buffer tank 5 is 100ml, and the mass flow meter 3 is used to measure the CO entering the buffer tank 5 2 amount;
[0050] (3) Isobaric exhaust: after the hydrate is formed, open the second valve 13 and the third valve 16, and inject the prepared brine with a certain mass fraction into the bottom of the r...
Embodiment 3
[0059] A method of producing natural gas hydrates, comprising the steps of:
[0060] (1) Generate hydrate: place the piston 37 at the bottom of the reactor 8, add a certain amount of sodium lauryl sulfate solution into the reactor 8, vacuumize, open the fourth valve 21, the seventh valve 30, and Reactor 8 is filled with CH 4 To a pressure of 8MPa, adjust the temperature of the constant temperature tank 4, under the conditions of a temperature of 6°C and a pressure of 8MPa, the reaction time is 50h to form a hydrate;
[0061] (2) CO 2 Reserve: when generating hydrate, close the first valve 7, 2 The gas is charged into the buffer tank 5, and the volume of the buffer tank 5 is 500ml, and the CO entering the buffer tank 5 is measured with a mass flow meter 3 2 amount;
[0062] (3) Isobaric exhaust: After the hydrate is formed, open the second valve 13 and the third valve 16, and use the hand pump 17 to inject a certain mass fraction of brine into the bottom of the reactor 8 fr...
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