Hydrate saturation calibration standard sample and calibration method
A hydrate and saturation technology, applied in geophysical measurement, instruments, etc.
Active Publication Date: 2019-08-30
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology
However, in the actual application process, the detection signal is affected by many factors, and it is difficult to establish an accurate relationship between the detection results and the real hydrate saturation.
Therefore, there is also a lack of calibration standards that can calibrate the resistivity test probe and the acoustic wave probe in this field
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[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0023] The hydrate saturation calibration standard sample of the present invention has an integral structure. Such as figure 1 As shown, the hydrate saturation calibration standard sample includes a non-conductive cavity 1, a voltage stabilizing piston 3, a voltage stabilizing nut 5, a detection wire 7, a pressure sensor 10, a detection probe 8, a signal converter 11, sand grains, water and gas mixture 2; sand, water and gas mixture 2 are filled into the non-conductive cavity 1, and the pressure-stabilizing piston 3 is installed on one side of the non-conductive cavity, and is connected with the cavity through the threaded handle 6 of the pressure-stabilizing piston and the pressure-stabilizing nut 5 One end of the body is fixed, and the pressure of water and gas in the cavity is kept stable by rotating the pressure-stabilizing nut 5 . A hole 9 is ope...
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The invention discloses a hydrate saturation calibration standard sample, which comprises a non-conductive cavity, a pressure-stabilizing piston, a pressure-stabilizing nut, a detection wire, a digital display pressure sensor, a detection probe, a signal converter, sand grains, water and gas. The non-conductive cavity is filled with the sand grains, the gas and the water, the pressure-stabilizingpiston is arranged on one side of the inner part of the non-conductive cavity and is fixed to one end of the cavity through a pressure-stabilizing piston threaded handle and the pressure-stabilizing nut, and the pressure of the water and the gas in the cavity can be kept stable by rotating the pressure-stabilizing nut. A hole is formed in the middle of the non-conductive cavity, and the non-conductive cavity is connected with the digital display pressure sensor for monitoring the cavity pressure. The invention also discloses a method for carrying out calibration by using the hydrate saturationcalibration standard sample. When calibrating an instrument that requires calibration, the standard sample needs to be placed in a low-temperature incubator; and after the hydrate is generated, a signal value of the instrument is recorded and compared with the saturation value corresponding to the standard sample. The scheme of the invention has high practicability, and provides a tool for accurately measuring the hydrate saturation.
Description
technical field [0001] The invention relates to a hydrate saturation calibration standard sample and a calibration method, belonging to the technical field of unconventional oil and gas development. Background technique [0002] Gas hydrate is a new type of energy discovered in the ocean and tundra in the past two decades. Natural gas hydrate is a solid crystalline substance synthesized by natural gas and water molecules under high pressure and low temperature conditions. It is white or light gray and looks like ice and snow. It can be ignited like an alcohol block, so some people call it "combustible ice" ". my country has successfully implemented natural gas hydrate test production in the Shenhu area of the South China Sea, becoming the fourth country with hydrate test production capacity after Canada, the United States and Japan. [0003] At present, a large number of experimental studies have been carried out on the development of natural gas hydrate, especially the ...
Claims
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IPC IPC(8): G01V13/00
CPCG01V13/00
Inventor 杜庆军石丽娜纪云开赵二猛周康侯健
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)