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Device and method for dynamic separation of water and gas in natural gas hydrate drilling fluid

A separation device and hydrate technology, applied in the field of natural gas hydrate research, can solve the problem of few monitoring methods, and achieve the effect of improving the efficiency of real-time online monitoring

Active Publication Date: 2018-10-30
OIL & GAS SURVEY CGS +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the monitoring of gas hydrate content changes in formation water during the exploitation of gas hydrate in the consolidated rock strata in permafrost regions has attracted the attention of many scholars, but there are few monitoring methods.

Method used

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  • Device and method for dynamic separation of water and gas in natural gas hydrate drilling fluid
  • Device and method for dynamic separation of water and gas in natural gas hydrate drilling fluid

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Embodiment Construction

[0018] Such as figure 1 As shown, this device for dynamic separation of water and gas in natural gas hydrate drilling fluid includes: deep submersible pump 1, diversion device 2, flow meter 3, water-gas balancer 4, drainage tank 5, condenser 6, gas detection and analysis Instrument 7;

[0019] Put the deep submersible pump into the drilling well, turn on the deep submersible pump, let the water enter the water-gas balancer, adjust the valve of the diversion device through the flow meter, and the separated water will be discharged into the drainage tank, and the separated gas will pass through the condenser Enter the gas detection analyzer.

[0020] In addition, the deep submersible pump is placed at least 0.5m away from the bottom of the well.

[0021] In addition, the water-gas balancer includes a water inlet 41 , a spiral nozzle 42 , a silica gel ball 43 , a pressure balance port 44 , and a main body of the water-gas balancer.

[0022] Such as figure 2 As shown, a metho...

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Abstract

The invention discloses a dynamic separation device for water and gas in natural gas hydrate drilling fluid. The device can dynamically separate dissolved methane in water (drilling fluid) along with drilling work, achieve comparison detection on methane in atmosphere, and can accurately measure response of decomposition of the natural gas hydrate on the atmosphere and water. The device comprises a deep diving pump, a branching device, a flowmeter, a water and gas balancer, a discharge box, a condenser and a gas detection analyzer; after being put into a finished drilled well, the deep diving pump is started to drive water to enter the water and gas balancer, a valve of the branching device is adjusted via the flowmeter, water generated after separation is discharged to the discharge box, and separated gases enter the gas detection analyzer after passing through the condenser. The invention also provides a dynamic separation method for water and gas in natural gas hydrate drilling fluid.

Description

technical field [0001] The invention relates to the technical field of natural gas hydrate research, in particular to a device and method for dynamic separation of water and gas in natural gas hydrate drilling fluid. Background technique [0002] Natural gas hydrate (Natural Gas Hydrate) is an ice-like, non-stoichiometric, clathrate solid compound composed of water and small guest gas molecules at low temperature and high pressure, commonly known as "combustible ice", because the gas component in it is mainly methane, so Also known as methane hydrate (Methane Hydrate). Natural gas hydrate has a high energy density. Under ideal conditions, 1m 3 The natural gas hydrate can be decomposed into 164m 3 methane gas and 0.8m 3 of water. The natural gas hydrate reserves on the earth are very rich, and the natural gas hydrates are widely distributed in permafrost regions, deep-sea sediments and deep lake sediments at the edge of the continental shelf, and the carbon storage in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/22
CPCG01N33/225
Inventor 庞守吉祝有海黄霞王明君王平康高相宇张帅肖睿
Owner OIL & GAS SURVEY CGS
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