Special reaction kettle for simulating sand production process of hydrate-containing sediments and its test method

Abstract

The invention belongs to the technical field of marine gas hydrate resource exploitation engineering and in particular relates to a special reaction kettle capable of simulating a dynamic variation rule of parameters in a sand production process of a hydrate-containing sediment under a true stress condition and a testing method thereof. The reaction kettle comprises a pressurizing kettle device and a holding device. The pressurizing kettle device comprises a reaction kettle body, a sediment clamping rubber gasket, an upper flange disc, a supporting flange, a lower flange cover and a piston pressurizing ejector rod. The sediment clamping rubber gasket and the supporting flange are arranged in the reaction kettle body, the supporting flange slides along the inner wall of the reaction kettle body, and a flowing channel where a confining pressure liquid circulates is arranged between the supporting flange and the inner wall of the reaction kettle body; one end of the piston pressurizing ejector rod penetrates through the upper flange cover and is in contact with the supporting flange, and a groove in contact with the piston pressurizing ejector rod is arranged on the end surface of the corresponding supporting flange. An in-situ forming demand of a hydrate sediment test sample is met, and sand production dynamic simulation in a condition of hydrate saturated degree of actual stratum is achieved.

Description

technical field

[0001] The invention belongs to the technical field of marine natural gas hydrate resources development engineering, and specifically relates to a reaction kettle capable of simulating the observation of the sand production process of hydrate-containing loose sediments under real seabed stress conditions and corresponding dynamic sand production parameters of hydrate-containing sediments testing method. Background technique

[0002] Natural gas hydrate resource is a kind of potential energy, which has the characteristics of wide distribution and high energy density. The research on the exploitation of hydrate resource has become an international hot issue. At present, the global hydrate research has gradually shifted from the exploration stage to the trial mining stage, and there is still a long way to go before industrialized mining.

[0003] At present, my country has accelerated the pace of research and accelerated the exploration and development of marin...

Examples

Embodiment 1

[0070] A test method for simulating a reactor for testing the sand production of hydrate-containing sediments, comprising the following steps:

[0071] The first step, sealing inspection:

[0072]Connect the upper and lower flange covers without installing the sample, inject 20MPa hydraulic pressure into the kettle body, and check whether the sealing rings at each sealing position are intact. The main inspection points are the piston pressurized ejector rod 10 and the upper flange cover 2, the dynamic seal between the pore pressure injection straight pipe 1 and the upper flange cover 2, the dynamic seal between the adjustment connecting rod 17 and the kettle body 3, and the upper flange cover 2 and the kettle body 3 The seal between the lower flange cover 8 and the kettle body 3, the standard that each sealing point does not leak is that the internal pressure of the kettle body remains constant for more than 10h.

[0073] The second step, sample loading:

[0074] Turn the au...

technical field

[0001] The invention belongs to the technical field of marine natural gas hydrate resources development engineering, and specifically relates to a reaction kettle capable of simulating the observation of the sand production process of hydrate-containing loose sediments under real seabed stress conditions and corresponding dynamic sand production parameters of hydrate-containing sediments testing method. Background technique

[0002] Natural gas hydrate resource is a kind of potential energy, which has the characteristics of wide distribution and high energy density. The research on the exploitation of hydrate resource has become an international hot issue. At present, the global hydrate research has gradually shifted from the exploration stage to the trial mining stage, and there is still a long way to go before industrialized mining.

[0003] At present, my country has accelerated the pace of research and accelerated the exploration and development of marin...

Examples

Embodiment 1

[0070] A test method for simulating a reactor for testing the sand production of hydrate-containing sediments, comprising the following steps:

[0071] The first step, sealing inspection:

[0072]Connect the upper and lower flange covers without installing the sample, inject 20MPa hydraulic pressure into the kettle body, and check whether the sealing rings at each sealing position are intact. The main inspection points are the piston pressurized ejector rod 10 and the upper flange cover 2, the dynamic seal between the pore pressure injection straight pipe 1 and the upper flange cover 2, the dynamic seal between the adjustment connecting rod 17 and the kettle body 3, and the upper flange cover 2 and the kettle body 3 The seal between the lower flange cover 8 and the kettle body 3, the standard that each sealing point does not leak is that the internal pressure of the kettle body remains constant for more than 10h.

[0073] The second step, sample loading:

[0074] Turn the au...

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