CN112213336A - CT (computed tomography) enhanced imaging method and system for three-dimensional structure of natural gas hydrate - Google Patents
CT (computed tomography) enhanced imaging method and system for three-dimensional structure of natural gas hydrate Download PDFInfo
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Abstract
The invention belongs to the technical field of hydrates, and particularly relates to a CT enhanced imaging method and a CT enhanced imaging system for a three-dimensional structure of a natural gas hydrate, aiming at solving the problems of poor observation positioning precision and low observation precision of the three-dimensional structure of the natural gas hydrate caused by small gray level difference of CT images in the prior art. According to the CT enhanced imaging method for the three-dimensional structure of the natural gas hydrate, provided by the invention, the water solution containing the intervention reinforcing agent is fully filled in the sediments containing the natural gas hydrate, and the intervention tracer dissolved in the water improves the mass attenuation coefficient mu/rho difference of X-rays in the natural gas hydrate, ice, water and methane gas, and simultaneously improves the mass energy absorption coefficient mu of the X-rays of the natural gas hydrate, ice, water and methane gasenAnd the/rho difference value further changes the linear attenuation coefficient received by the detector, and improves the imaging resolution of each component of the natural gas hydrate deposit.
Description
Technical Field
The invention belongs to the technical field of hydrates, and particularly relates to a CT enhanced imaging method and system for a three-dimensional structure of a natural gas hydrate.
Background
The determination of the three-dimensional morphological structure of the sediment containing the natural gas hydrate has important significance for revealing the occurrence state and the growth decomposition process of the sediment containing the natural gas hydrate, and the research of the exploration, evaluation and formation mechanism of natural gas hydrate resources. The X-ray CT imaging technology is a way for directly observing the internal space structure and the fracture evolution process of the natural gas hydrate. However, since the densities of the natural gas hydrate, ice, water and methane gas are very close (the relative density of the hydrate is 0.91, the density of ice is 0.917, the relative density of water is 1 and the relative density of methane is 0.7), the gray scale difference of the four in the CT image is not large, so that the resolution of the CT image is limited, and a relatively accurate natural gas hydrate internal space structure and distribution of fracture evolution cannot be obtained.
Therefore, the current CT enhanced imaging observation method for the three-dimensional structure of the natural gas hydrate cannot meet the requirements of accurately observing the content change of each component and the spatial position distribution of the natural gas hydrate deposit, and restricts the research on the natural gas hydrate deposit mechanism in nature.
Disclosure of Invention
The method aims to solve the problems in the prior art, namely the problems that the observation positioning precision is poor and the observation precision of the three-dimensional structure of the natural gas hydrate is low due to the fact that the CT image gray scale difference is not large in the imaging of the three-dimensional structure of the natural gas hydrate in the prior art. The invention provides a gas hydrate three-dimensional structure CT enhanced imaging method, which is completed based on industrial CT and specifically comprises the following steps:
step S100, preparing a liquid intervention tracer and a gas intervention tracer, wherein the liquid intervention tracer is prepared by mixing nitric acid and lead nitrate powder in a mass fraction ratio of 1: 40, and the gas intervention tracer is krypton;
step S200, respectively pumping the liquid intervention tracer and the gas intervention tracer into pressure kettle equipment;
step S300, arranging the pressure kettle equipment on an objective table of the industrial CT, and starting the objective table to enable the objective table to drive the pressure kettle equipment to rotate around the axis of the pressure kettle equipment;
and S400, starting a ray source and a detector of the industrial CT, enabling a ray bundle excited by the ray source to transmit the pressure kettle equipment to the detector, receiving the transmitted ray by the detector, and calculating according to the distribution mu (x, y) of the linear attenuation coefficient to obtain a CT image.
In some preferred technical solutions, "the nitric acid and lead nitrate powder is mixed in the step S100 in a mass fraction ratio of 1: 40, and obtaining the liquid intervention tracer specifically comprises the following steps:
step S110, mixing nitric acid and lead nitrate powder according to a mass fraction ratio of 1: 40, dissolving in water to obtain a lead nitrate solution;
and step S120, putting the lead nitrate solution into a high-speed rotor instrument, stirring for 10min, and then oscillating for 30min through an ultrasonic oscillator to obtain the liquid intervention tracer.
In some preferred embodiments, the step S200 of pumping the liquid intervention tracer and the gas intervention tracer into the autoclave device respectively is to pump the liquid intervention tracer and the gas intervention tracer into a liquid tracer pumping device and a gas tracer pumping device of the autoclave device respectively.
In some preferred technical schemes, the pressure kettle equipment comprises a pressure kettle, a pressure-resistant flexible cabin and a pressure control system, the pressure-resistant flexible cabin is arranged inside the pressure kettle, natural gas hydrate sediments are arranged inside the pressure-resistant flexible cabin, and the pressure control system is used for adjusting the pressure inside the pressure-resistant flexible cabin.
In some preferred embodiments, the "starting the radiation source and the detector of the industrial CT" in step S400 is to start the radiation source and the detector of the industrial CT after the pressure control system adjusts the pressure inside the pressure-resistant flexible cabin to be stable and starts the stage to rotate.
In some preferred technical solutions, the autoclave apparatus further includes a temperature control system, and the temperature control system is disposed between the autoclave housing and the pressure-resistant flexible compartment, and is configured to adjust the temperature inside the autoclave.
In some preferred technical schemes, the inside of the pressure kettle equipment is also provided with a vertical displacement control base, the pressure-resistant flexible cabin is connected with the vertical displacement control base, and the vertical displacement control base can drive the pressure-resistant flexible cabin to reciprocate along the height direction of the pressure-resistant flexible cabin.
In some preferred technical schemes, the mass fraction of the nitric acid is 0.5%, and the mass fraction of the lead nitrate powder is 20%.
In some preferred embodiments, the method further includes step S500, changing the line attenuation coefficient received by the detector to improve the imaging resolution of different components of the gas hydrate deposit.
The invention further provides a gas hydrate three-dimensional structure CT enhanced imaging system, which comprises an industrial CT and the pressure kettle equipment in any one of the technical schemes.
The invention has the beneficial effects that:
according to the CT enhanced imaging method for the three-dimensional structure of the natural gas hydrate, the X-ray projection process is influenced by an interventional enhanced imaging method of improving the difference of mass attenuation coefficients mu/rho between different substances and simultaneously improving the difference of mass energy absorption coefficients mu en/rho between the different substances through the liquid tracer high-concentration lead nitrate and the gas tracer krypton. The difference of the attenuation coefficients of the natural gas hydrate, the ice, the water and the methane gas in the pressure kettle is small, the CT imaging contrast of each component of the natural gas hydrate deposit is small, the resolution ratio is low, and the liquid tracer high-concentration lead nitrate is dissolved in the water, so that the attenuation coefficient of the ice is increased. Meanwhile, because krypton has the property of absorbing X-rays, methane gas is mixed with krypton and is traced by the gas. The attenuation coefficient of the natural gas hydrate is kept unchanged because the growth process of the natural gas hydrate has a salt elimination effect, and the contrast difference value of the linear attenuation coefficient received by the detector is increased, so that the imaging resolution of the three-dimensional structure of the natural gas hydrate is improved.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a flow chart of a CT enhanced imaging method for a three-dimensional structure of a gas hydrate according to an embodiment of the invention;
fig. 2 is a schematic view of the overall structure of a gas hydrate three-dimensional structure CT enhanced imaging system according to an embodiment of the present invention.
List of reference numerals:
1-a detector; 2-liquid tracer pumping into the apparatus; 3-pumping the gas tracer into the device; 4-a temperature control system; 5-a pressure control system; 6-X-ray source; 7-pressure kettle; 8-a vertical displacement control base; 9-a pressure-resistant flexible cabin; 10-natural gas hydrate deposits; 11-a high-precision turntable; 12-autoclave booster pump inlet.
Detailed Description
In order to make the embodiments, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
The invention discloses a CT enhanced imaging method for a three-dimensional structure of a natural gas hydrate, which is completed based on industrial CT and specifically comprises the following steps:
step S100, preparing a liquid intervention tracer and a gas intervention tracer, wherein the liquid intervention tracer is prepared by mixing nitric acid and lead nitrate powder in a mass fraction ratio of 1: 40, and the gas intervention tracer is krypton;
step S200, respectively pumping the liquid intervention tracer and the gas intervention tracer into pressure kettle equipment;
step S300, arranging the pressure kettle equipment on an objective table of the industrial CT, and starting the objective table to enable the objective table to drive the pressure kettle equipment to rotate around the axis of the pressure kettle equipment;
and S400, starting a ray source and a detector of the industrial CT, enabling a ray bundle excited by the ray source to transmit the pressure kettle equipment to the detector, receiving the transmitted ray by the detector, and calculating according to the distribution mu (x, y) of the linear attenuation coefficient to obtain a CT image.
In order to more clearly explain the CT enhanced imaging method of the three-dimensional structure of the gas hydrate of the present invention, a preferred embodiment of the present invention is described in detail below with reference to the accompanying drawings.
As a preferred embodiment of the present invention, the CT enhanced imaging method for a three-dimensional structure of a natural gas hydrate according to the present invention is based on industrial CT (ict), which is computed tomography or computed tomography, and generally includes a radiation source, a mechanical scanning system, a detector system, a computer system, and a shielding facility. Industrial CT is common knowledge in the art.
In a preferred embodiment of the present invention, an industrial CT includes a detector, a source of radiation, and a stage. Specifically, the radiation source is an X-ray source 6 as shown in FIG. 1, and the object stage is a high-precision turntable 11; wherein, the high-precision rotary table 11 is provided with a pressure kettle device, an X-ray beam excited by the X-ray source 6 transmits the pressure kettle device, the transmitted X-ray is received by the detector 1, and a CT image is calculated according to the distribution mu (X, y) of the linear attenuation coefficient.
Specifically, the pressure kettle equipment comprises a liquid tracer pumping device 2, a gas tracer pumping device 3, a temperature control system 4, a pressure control system 5, a pressure kettle 7, a pressure-resistant flexible cabin 9 and a vertical displacement control base 8. The pressure-resistant flexible cabin 9 is arranged inside the pressure kettle 7 and is used for containing natural gas hydrate sediments 10; the pressure control system 5 is used to control the pressure inside the pressure-resistant flexible tank 9. The pressure kettle 7 is arranged on the high-precision rotary table 11, and the temperature control system 4 is arranged between the shell of the pressure kettle 7 and the pressure-resistant flexible cabin 9. It is understood that the forms (solid, liquid or gas) of the components of the natural gas hydrate can change due to the change of temperature, and the existence condition of the hydrate natural gas hydrate requires certain temperature and pressure, so the temperature control system 4 and the pressure control system 5 are arranged for adjusting the temperature and the pressure inside the pressure kettle 7.
Further, the test pressure of the pressure-resistant flexible cabin 9 can be adjusted through the inlet 12 of the pressure kettle booster pump, so that the pressure-resistant flexible cabin 9 can control the high-precision rotary table 11 to rotate at a certain speed after being stabilized in a certain pressure environment, the X-ray source 6 and the detector 1 of the industrial CT are started, a ray bundle excited by the X-ray source 6 is enabled to transmit from the pressure kettle 7 to the detector 1, the detector 1 receives the transmitted ray, and a CT image is obtained through calculation according to the distribution mu (X, y) of the linear attenuation coefficient.
It will be appreciated that the liquid tracer pumping means 2, the gas tracer pumping means 3, and the autoclave booster pump inlet 12 of the present invention are all schematically shown in the drawings as being disposed below the autoclave 7, and those skilled in the art can adjust the positions thereof at will, as long as they can load the pressure vessel 7 with the interventional tracer or the loading pressure.
In a preferred embodiment of the present invention, the method for CT enhanced imaging of a three-dimensional structure of a gas hydrate specifically includes the following steps:
step S100, preparing a liquid intervention tracer and a gas intervention tracer, wherein the liquid intervention tracer is prepared by mixing nitric acid and lead nitrate powder in a mass fraction ratio of 1: 40, and the gas intervention tracer is krypton;
step S200, respectively pumping the liquid intervention tracer and the gas intervention tracer into a pressure-resistant flexible cabin 9 in a pressure kettle 7, so that the liquid intervention tracer, the gas intervention tracer and the natural gas hydrate sediment 10 are uniformly mixed;
step S300, arranging the pressure kettle equipment on a high-precision rotary table 11 of the industrial CT, and starting the high-precision rotary table 11 to enable the high-precision rotary table 11 to drive the pressure kettle equipment to rotate around the axis of the pressure kettle equipment;
step S400, starting the X-ray source 6 and the detector 1 of the industrial CT, enabling a ray beam excited by the X-ray source 6 to transmit from the autoclave 7 to the detector 1, receiving the transmitted ray by the detector 1, and calculating according to the distribution mu (X, y) of the linear attenuation coefficient to obtain a CT image.
Specifically, "nitric acid and lead nitrate powder are mixed in a mass fraction ratio of 1: 40, and obtaining the liquid intervention tracer specifically comprises the following steps:
step S110, mixing nitric acid and lead nitrate powder according to a mass fraction ratio of 1: 40, dissolving in water to obtain a lead nitrate solution;
and step S120, putting the lead nitrate solution into a high-speed rotor instrument, stirring for 10min, and then oscillating for 30min through an ultrasonic oscillator to obtain the liquid intervention tracer.
Further, the method of "pumping the liquid intervention tracer and the gas intervention tracer into the autoclave facility respectively" in step S200 is to pump the liquid intervention tracer and the gas intervention tracer into the autoclave facility respectively through the liquid tracer pumping device 2 and the gas tracer pumping device 3 of the autoclave facility.
In a preferred embodiment of the invention, the liquid interventional tracer is a high concentration lead nitrate solution and the gaseous tracer is krypton. Preferably, lead nitrate powder with the mass fraction of 20% and nitric acid with the mass fraction of 0.5% are dissolved in water to obtain a high-concentration lead nitrate solution; and then stirring for 10min by a high-speed rotor instrument, oscillating for 30min by an ultrasonic oscillator to obtain a liquid reinforcing agent, pumping the liquid reinforcing agent into the natural gas hydrate deposit 10 in the pressure kettle 7 by a liquid tracer pumping device 2, and pumping krypton into the natural gas hydrate deposit 10 in the pressure kettle 7 by a gas tracer pumping device 3.
In step S400, the "starting the radiation source and the detector of the industrial CT" is to start the X-ray source 6 and the detector 1 of the industrial CT after the pressure control system 5 adjusts the pressure inside the pressure-resistant flexible chamber 9 to be stable and starts the objective table to rotate at a certain speed. Specifically, the pressure vessel 7 is arranged on the high-precision rotary table 11, the test pressure is adjusted to the pressure-resistant flexible cabin 9 through the inlet 12 of the pressure vessel booster pump, and the high-precision rotary table 11 rotates at a certain speed when the pressure vessel booster pump is stabilized in a certain pressure environment; it will be appreciated that the rotational speed of the high-precision gantry may be selected to operate in accordance with conventional choices of industrial CT imaging equipment.
Preferably, the pressure-resistant flexible cabin 9 is connected with the vertical displacement control base 8, and the vertical displacement control base 8 can drive the pressure-resistant flexible cabin 9 to reciprocate along the height direction of the pressure-resistant flexible cabin. It will be appreciated that the subject table of the present invention, as part of an industrial CT, is also rotatable about its axis and vertically movable up and down.
Preferably, the CT enhanced imaging method for the three-dimensional structure of the gas hydrate further includes step S500, changing the line attenuation coefficient received by the detector 1, so as to improve the imaging resolution of different components of the gas hydrate deposit.
To sum up, the specific implementation manner of the natural gas hydrate three-dimensional structure CT enhanced imaging method is as follows:
firstly, preparing a liquid tracer with a certain concentration, dissolving 20 mass percent of lead nitrate powder and 0.5 mass percent of nitric acid in water, stirring for 10min by using a high-speed rotor instrument, oscillating for 30min by using an ultrasonic oscillator to obtain a liquid reinforcing agent, pumping high-concentration lead nitrate into a natural gas hydrate deposit 10 in a pressure kettle 7 by using a liquid tracer pumping device 2, and simultaneously pumping the high-concentration lead nitrate into the natural gas hydrate deposit 10 in the pressure kettle 7 by using a gas tracer pumping device 3.
The pressure kettle is arranged on the high-precision rotary table 11, the test pressure is adjusted to the pressure-resistant flexible cabin 9 through the inlet 12 of the pressure kettle booster pump, and the high-precision rotary table 11 rotates at a certain speed when the pressure kettle is stabilized in a certain pressure environment.
Operating industrial CT, the X-ray beam excited by X-ray source 6 transmits natural gas hydrate deposit 10, and detectsThe X-ray after transmission is received by the device 1, and a CT image is calculated according to the distribution mu (X, y) of the linear attenuation coefficient. Because the interventional tracer increases the difference of the mass attenuation coefficient mu/rho between different substances, i.e. increases the mass-energy absorption coefficient mu between different substancesenThe difference of/[ rho ] influences the X-ray projection process, changes the linear attenuation coefficient received by the detector 1, and further improves the imaging resolution of different components of the natural gas hydrate deposit 10.
In the technical solution in the embodiment of the present application, at least the following technical effects and advantages are provided:
the X-ray CT image of the natural gas hydrate deposit reflects the X-ray absorption degree of each component of the natural gas hydrate deposit, the density of each component in the natural gas hydrate deposit is in direct proportion to the X-ray absorption coefficient, and the higher the atomic number of the component is, the more obvious the X-ray attenuation is, and the larger the mass attenuation coefficient is. The greater the difference in density of adjacent components, the greater the X-ray CT imaging contrast and the higher the resolution. By utilizing the principle, the invention provides a CT enhanced imaging method for a three-dimensional structure of a natural gas hydrate, which influences the X-ray projection process by an interventional enhanced imaging method of improving the difference of mass attenuation coefficients mu/rho between different substances and simultaneously improving the difference of mass energy absorption coefficients mu en/rho between the different substances through a liquid tracer high-concentration lead nitrate and a gas tracer krypton. The difference of the attenuation coefficients of the natural gas hydrate, the ice, the water and the methane gas in the pressure kettle is small, the CT imaging contrast of each component of the natural gas hydrate deposit is small, the resolution ratio is low, and the liquid tracer high-concentration lead nitrate is dissolved in the water, so that the attenuation coefficient of the ice is increased. Meanwhile, because krypton has the property of absorbing X-rays, methane gas is mixed with krypton and is traced by the gas. The attenuation coefficient of the natural gas hydrate is kept unchanged because the growth process of the natural gas hydrate has a salt elimination effect, and the contrast difference value of the linear attenuation coefficient received by the detector is increased, so that the imaging resolution of the three-dimensional structure of the natural gas hydrate is improved.
It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The terms "comprises," "comprising," or any other similar term are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. A CT enhanced imaging method for a three-dimensional structure of a natural gas hydrate is characterized by being completed based on industrial CT and specifically comprising the following steps of:
step S100, preparing a liquid intervention tracer and a gas intervention tracer, wherein the liquid intervention tracer is prepared by mixing nitric acid and lead nitrate powder in a mass fraction ratio of 1: 40, and the gas intervention tracer is krypton;
step S200, respectively pumping the liquid intervention tracer and the gas intervention tracer into pressure kettle equipment;
step S300, arranging the pressure kettle equipment on an objective table of the industrial CT, and starting the objective table to enable the objective table to drive the pressure kettle equipment to rotate around the axis of the pressure kettle equipment;
and S400, starting a ray source and a detector of the industrial CT, enabling a ray bundle excited by the ray source to transmit the pressure kettle equipment to the detector, receiving the transmitted ray by the detector, and calculating according to the distribution mu (x, y) of the linear attenuation coefficient to obtain a CT image.
2. The CT-enhanced imaging method for the three-dimensional structure of the natural gas hydrate as recited in claim 1, wherein the ratio of the nitric acid to the lead nitrate powder in the step S100 is 1: 40 "comprises the following steps:
step S110, mixing nitric acid and lead nitrate powder according to a mass fraction ratio of 1: 40, dissolving in water to obtain a lead nitrate solution;
and step S120, putting the lead nitrate solution into a high-speed rotor instrument, stirring for 10min, and then oscillating for 30min through an ultrasonic oscillator to obtain the liquid intervention tracer.
3. The CT-enhanced imaging method for the three-dimensional structure of the natural gas hydrate as claimed in claim 1, wherein the step S200 of pumping the liquid intervention tracer and the gas intervention tracer into the autoclave facility respectively comprises the step of pumping the liquid intervention tracer and the gas intervention tracer into a liquid tracer pumping device and a gas tracer pumping device of the autoclave facility respectively.
4. The CT enhanced imaging method for the three-dimensional structure of the natural gas hydrate as recited in claim 1, wherein the autoclave device comprises an autoclave, a pressure-resistant flexible cabin and a pressure control system, the pressure-resistant flexible cabin is arranged inside the autoclave, natural gas hydrate sediments are arranged inside the pressure-resistant flexible cabin, and the pressure control system is used for adjusting the pressure inside the pressure-resistant flexible cabin.
5. The CT-enhanced imaging method for the three-dimensional structure of the natural gas hydrate as recited in claim 4, wherein the step S400 of starting the radiation source and the detector of the industrial CT is that after the pressure control system adjusts the pressure inside the pressure-resistant flexible cabin to be stable and starts the stage to rotate, the radiation source and the detector of the industrial CT are started.
6. The CT-enhanced imaging method for the three-dimensional structure of the natural gas hydrate as recited in claim 4, wherein the autoclave device further comprises a temperature control system, and the temperature control system is arranged between the autoclave shell and the pressure-resistant flexible cabin and used for adjusting the temperature inside the autoclave.
7. The CT enhanced imaging method for the three-dimensional structure of the natural gas hydrate as recited in claim 4, wherein a vertical displacement control base is further arranged inside the autoclave device, the pressure-resistant flexible cabin is connected with the vertical displacement control base, and the vertical displacement control base can drive the pressure-resistant flexible cabin to reciprocate along the height direction of the pressure-resistant flexible cabin.
8. The CT-enhanced imaging method for the three-dimensional structure of the natural gas hydrate as recited in claim 1, wherein the mass fraction of the nitric acid is 0.5%, and the mass fraction of the lead nitrate powder is 20%.
9. The CT enhanced imaging method for the three-dimensional structure of the gas hydrate as claimed in claim 1, wherein the method further comprises step S500 of changing the line attenuation coefficients received by the detector to improve the imaging resolution of different components of the gas hydrate deposit.
10. A gas hydrate three-dimensional structure CT enhanced imaging system, characterized in that the system comprises an industrial CT and the autoclave apparatus as claimed in any one of claims 1 to 7.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113916727A (en) * | 2021-12-15 | 2022-01-11 | 中国科学院地质与地球物理研究所 | Natural gas hydrate in-situ simulation multifunctional experiment system |
| CN117173031A (en) * | 2023-06-01 | 2023-12-05 | 广州科易光电技术有限公司 | Image processing method and device for gas, electronic equipment and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101699258A (en) * | 2009-10-23 | 2010-04-28 | 中国科学院力学研究所 | Device and method thereof for testing synthesis and decomposition parameters of hydrate sediment |
| CN106323999A (en) * | 2016-08-12 | 2017-01-11 | 中国科学院地质与地球物理研究所 | Intervention enhancement imaging method for rock hydrofracture test cracks |
| CN106950355A (en) * | 2017-05-23 | 2017-07-14 | 中国石油大学(华东) | A kind of ocean gas hydrate with the comprehensive on-line measuring device of ship and method |
| CN107976351A (en) * | 2017-11-27 | 2018-05-01 | 大连理工大学 | A kind of ocean gas hydrate core remodeling device and method |
| CN110567814A (en) * | 2019-08-26 | 2019-12-13 | 中国科学院地质与地球物理研究所 | Neutron imaging method for natural gas hydrate sediment triaxial mechanical test |
-
2020
- 2020-09-02 CN CN202010909866.XA patent/CN112213336A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101699258A (en) * | 2009-10-23 | 2010-04-28 | 中国科学院力学研究所 | Device and method thereof for testing synthesis and decomposition parameters of hydrate sediment |
| CN106323999A (en) * | 2016-08-12 | 2017-01-11 | 中国科学院地质与地球物理研究所 | Intervention enhancement imaging method for rock hydrofracture test cracks |
| CN106950355A (en) * | 2017-05-23 | 2017-07-14 | 中国石油大学(华东) | A kind of ocean gas hydrate with the comprehensive on-line measuring device of ship and method |
| CN107976351A (en) * | 2017-11-27 | 2018-05-01 | 大连理工大学 | A kind of ocean gas hydrate core remodeling device and method |
| CN110567814A (en) * | 2019-08-26 | 2019-12-13 | 中国科学院地质与地球物理研究所 | Neutron imaging method for natural gas hydrate sediment triaxial mechanical test |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113916727A (en) * | 2021-12-15 | 2022-01-11 | 中国科学院地质与地球物理研究所 | Natural gas hydrate in-situ simulation multifunctional experiment system |
| US11519866B1 (en) | 2021-12-15 | 2022-12-06 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Multifunctional experimental system for in-situ simulation of gas hydrate |
| CN117173031A (en) * | 2023-06-01 | 2023-12-05 | 广州科易光电技术有限公司 | Image processing method and device for gas, electronic equipment and storage medium |
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