CN114062640B - Separation metering experimental device and method for marine natural gas hydrate - Google Patents
Separation metering experimental device and method for marine natural gas hydrate Download PDFInfo
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- CN114062640B CN114062640B CN202010743917.6A CN202010743917A CN114062640B CN 114062640 B CN114062640 B CN 114062640B CN 202010743917 A CN202010743917 A CN 202010743917A CN 114062640 B CN114062640 B CN 114062640B
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- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 title claims abstract description 119
- 238000000926 separation method Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000007789 gas Substances 0.000 claims abstract description 75
- 239000007788 liquid Substances 0.000 claims abstract description 69
- 238000002474 experimental method Methods 0.000 claims abstract description 68
- 238000010438 heat treatment Methods 0.000 claims abstract description 53
- 238000007789 sealing Methods 0.000 claims description 11
- 239000011521 glass Substances 0.000 claims description 4
- 229910052594 sapphire Inorganic materials 0.000 claims description 4
- 239000010980 sapphire Substances 0.000 claims description 4
- 238000005553 drilling Methods 0.000 abstract description 26
- 230000008859 change Effects 0.000 abstract description 25
- 239000002245 particle Substances 0.000 abstract description 14
- 239000012530 fluid Substances 0.000 abstract description 10
- 239000012071 phase Substances 0.000 description 8
- 238000000354 decomposition reaction Methods 0.000 description 7
- 239000007791 liquid phase Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000005065 mining Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000004925 denaturation Methods 0.000 description 3
- 230000036425 denaturation Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005243 fluidization Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Natural products C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- -1 natural gas hydrates Chemical class 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels; Explosives
- G01N33/222—Solid fuels, e.g. coal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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Abstract
The invention discloses a separation metering experimental device and a method for marine natural gas hydrate, wherein the device comprises the following components: the sample experiment kettle is used for containing marine natural gas hydrate samples, the top of the sample experiment kettle is provided with a first kettle opening, and the bottom of the sample experiment kettle is provided with a second kettle opening; the heating device is sleeved outside the sample experimental kettle and is used for heating the marine natural gas hydrate sample; the gas flowmeter is used for measuring gas flow data at the first kettle opening; the liquid metering pump is used for measuring liquid flow data at the second kettle opening; the temperature sensor and the pressure sensor are used for measuring temperature and pressure data in the sample experimental kettle; the control equipment comprises a control cabinet and a PC end, wherein the control cabinet is used for controlling the heating device to be in an on state or an off state, and the PC end is used for recording gas flow data, liquid flow data, temperature data and pressure data. The invention can simulate the structural change of the ore body of the hydrate particles in an unstable state and master the rheological property of the drilling fluid and the flow parameter change of the shaft.
Description
Technical Field
The invention relates to the technical field of drilling and production of marine natural gas hydrates, in particular to a separation metering experimental device and a separation metering experimental method of marine natural gas hydrates.
Background
The natural gas hydrate resources are very abundant and are mainly distributed in the land permafrost zone and the submarine sediment at the periphery of the land margin, wherein the marine natural gas hydrate resources are more than 100 times of the land permafrost zone. The natural gas hydrate on the shallow surface layer of the seabed is kept in a relatively stable state under the original temperature and pressure environment of the seabed. However, with the development of offshore oil and gas drilling technology, hydrate test mining which has been implemented in the world is carried out in a diagenetic hydrate ore body, and when broken hydrate particles enter a shaft, the pressure and the temperature are changed to influence the stable state of the hydrate particles, so that the greatest threat is caused to drilling and mining construction safety. On the other hand, the hydrate layer drilling cuttings particles are different from rock cuttings particles in the conventional ocean drilling process, the rock cuttings particles are decomposed due to the change of the temperature and the pressure of a shaft in the annular space along with the upward movement of drilling fluid, the decomposition endothermic effect of the hydrate drilling cuttings particles can further influence the change of the hydrate ore body structure, and the gas-liquid two phases in the whole shaft can be changed, so that the change of the rheological property of the drilling fluid and the flow parameters of the shaft and the ocean drilling safety construction can be influenced. Therefore, it is necessary to study natural gas hydrate in an unstable state.
At present, the existing research object mainly aims at a physical simulation experiment system for generating natural gas hydrate and a solid-state fluidization mining machine, so that the structural change of a ore body of hydrate particles in an unstable state is difficult to simulate, the change of the rheological property of drilling fluid and the flow parameters of a shaft cannot be mastered, and potential safety hazards exist in later-stage drilling and production of marine natural gas hydrate.
Disclosure of Invention
The embodiment of the invention provides a separation metering experimental device for marine natural gas hydrate, which is used for simulating the structural change of ore bodies of hydrate particles in an unstable state, measuring the component content of the marine natural gas hydrate in the unstable state, grasping the change of the rheological property of drilling fluid and the flow parameters of a shaft, and providing theoretical and experimental foundation for later-stage drilling and production of the marine natural gas hydrate, and comprises the following steps:
The sample experiment kettle is used for containing marine natural gas hydrate samples, a first kettle opening is formed in the top of the sample experiment kettle, and a second kettle opening is formed in the bottom of the sample experiment kettle;
the heating device is sleeved outside the sample experimental kettle and is used for heating the marine natural gas hydrate sample contained in the sample experimental kettle;
the gas flowmeter is connected with the first kettle opening of the sample experimental kettle and is used for measuring gas flow data of the marine natural gas hydrate sample in the sample experimental kettle decomposed at the first kettle opening;
The liquid metering pump is connected with the second kettle opening of the sample experimental kettle and is used for measuring liquid flow data of the ocean natural gas hydrate sample in the sample experimental kettle decomposed at the second kettle opening;
the temperature sensor is arranged in the sample experimental kettle and is used for measuring temperature data in the sample experimental kettle;
the pressure sensor is arranged in the sample experimental kettle and is used for measuring pressure data in the sample experimental kettle;
The control equipment comprises a control cabinet and a PC end, wherein the control cabinet is connected with the heating device and used for controlling the heating device to be in an on state or an off state, the PC end is connected with the gas flowmeter, the liquid metering pump, the temperature sensor and the pressure sensor and used for recording gas flow data at the first kettle opening and liquid flow data at the second kettle opening, and temperature data and pressure data inside the sample experimental kettle are recorded.
The embodiment of the invention provides a metering method of marine natural gas hydrate, which is used for simulating the structural change of ore bodies of hydrate particles in an unstable state, measuring the component content of the marine natural gas hydrate in the unstable state, grasping the change of drilling fluid rheological property and shaft flow parameters and providing theoretical and experimental basis for later-stage marine natural gas hydrate drilling and production, and comprises the following steps:
Obtaining a marine natural gas hydrate sample, and placing the marine natural gas hydrate sample into a sample experimental kettle;
The control cabinet sets the heating device in an on state, and the heating device heats the marine natural gas hydrate sample in the sample experiment kettle;
The gas flow meter measures the gas flow data of first cauldron mouth department, and the liquid metering pump measures the liquid flow data of second cauldron mouth department, temperature sensor measures the inside temperature data of sample experiment cauldron, pressure sensor measures the inside pressure data of sample experiment cauldron, PC end record the gas flow data of first cauldron mouth department, the liquid flow data of second cauldron mouth department, the inside temperature data and the pressure data of sample experiment cauldron.
Compared with the scheme of a physical simulation experiment system and a solid-state fluidization mining machine for generating natural gas hydrate in the prior art, the separation metering experiment device for the marine natural gas hydrate provided by the embodiment of the invention comprises the following components: the sample experiment kettle is used for containing marine natural gas hydrate samples, a first kettle opening is formed in the top of the sample experiment kettle, and a second kettle opening is formed in the bottom of the sample experiment kettle; the heating device is sleeved outside the sample experimental kettle and is used for heating the marine natural gas hydrate sample contained in the sample experimental kettle; the gas flowmeter is connected with the first kettle opening of the sample experimental kettle and is used for measuring gas flow data of the marine natural gas hydrate sample in the sample experimental kettle decomposed at the first kettle opening; the liquid metering pump is connected with the second kettle opening of the sample experimental kettle and is used for measuring liquid flow data of the ocean natural gas hydrate sample in the sample experimental kettle decomposed at the second kettle opening; the temperature sensor is arranged in the sample experimental kettle and is used for measuring temperature data in the sample experimental kettle; the pressure sensor is arranged in the sample experimental kettle and is used for measuring pressure data in the sample experimental kettle; the control equipment comprises a control cabinet and a PC end, wherein the control cabinet is connected with the heating device and used for controlling the heating device to be in an on state or an off state, the PC end is connected with the gas flowmeter, the liquid metering pump, the temperature sensor and the pressure sensor and used for recording gas flow data at the first kettle opening and liquid flow data at the second kettle opening, and temperature data and pressure data inside the sample experimental kettle are recorded. According to the embodiment of the invention, the marine natural gas hydrate sample is obtained and put into the sample experimental kettle, the heating device is set to be in an open state by the control cabinet, the marine natural gas hydrate sample in the sample experimental kettle is heated by the heating device, the structural change of the ore body of the hydrate particles in an unstable state can be effectively simulated by arranging the heating device outside the sample experimental kettle, then the gas flow data at the first kettle opening is measured by the gas flowmeter, the liquid flow data at the second kettle opening is measured by the liquid metering pump, the temperature data in the sample experimental kettle is measured by the temperature sensor, the pressure data in the sample experimental kettle is measured by the pressure sensor, and the record is carried out at the PC end, so that the hydrate sample is decomposed into a liquid phase and a gas phase by the hydrate sample experimental kettle, the flow of the gas and the flow of the liquid are respectively measured, the measurement of the component content of the marine natural gas hydrate in the unstable state is realized, the change of the drilling fluid flow denaturation and the flow parameters of a shaft is conveniently mastered, and a theoretical and experimental foundation is provided for the later marine natural gas hydrate drilling.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. In the drawings:
FIG. 1 is a diagram of a separation metering experimental device for ocean natural gas hydrate in an embodiment of the invention;
Fig. 2 is a flow chart of an experimental method for separating and metering marine natural gas hydrate in an embodiment of the invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings. The exemplary embodiments of the present invention and their descriptions herein are for the purpose of explaining the present invention, but are not to be construed as limiting the invention.
In order to simulate the structural change of ore bodies of hydrate particles in an unstable state, measure the component content of the marine natural gas hydrate in the unstable state, master the change of the rheological property of drilling fluid and the flow parameters of a shaft, and provide theoretical and experimental basis for the later-stage drilling of the marine natural gas hydrate, the embodiment of the invention provides a separation metering experimental device of the marine natural gas hydrate, as shown in fig. 1, the device can comprise:
The sample experiment kettle 101 is used for containing marine natural gas hydrate samples, a first kettle opening is formed in the top of the sample experiment kettle 101, and a second kettle opening is formed in the bottom of the sample experiment kettle 101;
The heating device 102 is sleeved outside the sample experiment kettle 101 and is used for heating the marine natural gas hydrate sample contained in the sample experiment kettle 101;
a gas flowmeter 103 connected with the first kettle opening of the sample experimental kettle 101 and used for measuring gas flow data of the ocean natural gas hydrate sample in the sample experimental kettle 101 decomposed at the first kettle opening;
a liquid metering pump 104 connected with the second kettle opening of the sample experimental kettle 101 and used for measuring liquid flow data of the ocean natural gas hydrate sample decomposed at the second kettle opening in the sample experimental kettle 101;
A temperature sensor 105 disposed in the sample experimental tank 101 for measuring temperature data inside the sample experimental tank 101;
A pressure sensor 106 disposed in the sample experimental tank 101 for measuring pressure data inside the sample experimental tank 101;
The control equipment comprises a control cabinet 107 and a PC end 108, wherein the control cabinet 107 is connected with the heating device 102 and used for controlling the heating device 102 to be in an on state or an off state, the PC end 108 is connected with the gas flowmeter 103, the liquid metering pump 104, the temperature sensor 105 and the pressure sensor 106 and used for recording gas flow data at the first kettle opening and liquid flow data at the second kettle opening, and the temperature data and the pressure data inside the sample experimental kettle 101.
As can be seen from fig. 1, the experimental device for separating and metering marine natural gas hydrate provided by the embodiment of the invention comprises: the sample experiment kettle is used for containing marine natural gas hydrate samples, a first kettle opening is formed in the top of the sample experiment kettle, and a second kettle opening is formed in the bottom of the sample experiment kettle; the heating device is sleeved outside the sample experimental kettle and is used for heating the marine natural gas hydrate sample contained in the sample experimental kettle; the gas flowmeter is connected with the first kettle opening of the sample experimental kettle and is used for measuring gas flow data of the marine natural gas hydrate sample in the sample experimental kettle decomposed at the first kettle opening; the liquid metering pump is connected with the second kettle opening of the sample experimental kettle and is used for measuring liquid flow data of the ocean natural gas hydrate sample in the sample experimental kettle decomposed at the second kettle opening; the temperature sensor is arranged in the sample experimental kettle and is used for measuring temperature data in the sample experimental kettle; the pressure sensor is arranged in the sample experimental kettle and is used for measuring pressure data in the sample experimental kettle; the control equipment comprises a control cabinet and a PC end, wherein the control cabinet is connected with the heating device and used for controlling the heating device to be in an on state or an off state, the PC end is connected with the gas flowmeter, the liquid metering pump, the temperature sensor and the pressure sensor and used for recording gas flow data at the first kettle opening and liquid flow data at the second kettle opening, and temperature data and pressure data inside the sample experimental kettle are recorded. According to the embodiment of the invention, the marine natural gas hydrate sample is obtained and put into the sample experimental kettle, the heating device is set to be in an open state by the control cabinet, the marine natural gas hydrate sample in the sample experimental kettle is heated by the heating device, the structural change of the ore body of the hydrate particles in an unstable state can be effectively simulated by arranging the heating device outside the sample experimental kettle, then the gas flow data at the first kettle opening is measured by the gas flowmeter, the liquid flow data at the second kettle opening is measured by the liquid metering pump, the temperature data in the sample experimental kettle is measured by the temperature sensor, the pressure data in the sample experimental kettle is measured by the pressure sensor, and the record is carried out at the PC end, so that the hydrate sample is decomposed into a liquid phase and a gas phase by the hydrate sample experimental kettle, the flow of the gas and the flow of the liquid are respectively measured, the measurement of the component content of the marine natural gas hydrate in the unstable state is realized, the change of the drilling fluid flow denaturation and the flow parameters of a shaft is conveniently mastered, and a theoretical and experimental foundation is provided for the later marine natural gas hydrate drilling.
In the embodiment, a sample experiment kettle 101 in a separation metering experiment device for marine natural gas hydrate is used for containing a marine natural gas hydrate sample, a first kettle opening is formed in the top of the sample experiment kettle 101, and a second kettle opening is formed in the bottom of the sample experiment kettle 101. The heating device 102 is sleeved outside the sample experimental kettle 101 and is used for heating the marine natural gas hydrate sample contained in the sample experimental kettle 101, wherein the heating device 102 can be an annular heating sleeve. The control cabinet 107 is connected to the heating device 102, and is used for controlling the heating device 102 to be in an on state or an off state. The gas flowmeter 103 is connected with the first kettle opening of the sample experiment kettle 101 and is used for measuring gas flow data of the marine natural gas hydrate sample in the sample experiment kettle 101 decomposed at the first kettle opening, the liquid metering pump 104 is connected with the second kettle opening of the sample experiment kettle 101 and is used for measuring liquid flow data of the marine natural gas hydrate sample in the sample experiment kettle 101 decomposed at the second kettle opening, the liquid metering pump 104 can meter the liquid flow of the marine natural gas hydrate decomposed, the liquid flow data of the second kettle opening is recorded through the connection PC end 108, and in addition, the liquid flow of the second kettle opening can be controlled through the PC end 108. The temperature sensor 105 is arranged in the sample experiment kettle 101 and is used for measuring temperature data inside the sample experiment kettle 101; a pressure sensor 106 is provided in the sample experimental tank 101 for measuring pressure data inside the sample experimental tank 101. Specifically, the pressure of the gas-liquid interface in the sample experimental tank 101 may be measured. The control equipment comprises a control cabinet 107 and a PC end 108, wherein the PC end 108 is connected with the gas flowmeter 103, the liquid metering pump 104, the temperature sensor 105 and the pressure sensor 106 and is used for recording gas flow data at the first kettle opening, liquid flow data at the second kettle opening, and temperature data and pressure data inside the sample experimental kettle 101.
In an embodiment, the separation metering experiment device of marine natural gas hydrate further comprises: a first sealing flange 109 for sealing a first port on the top of the sample experimental kettle 101; and a second sealing flange 110 for sealing a second kettle opening at the bottom of the sample experimental kettle 101. Compared with other sealing devices, the sealing flange has the advantage of convenience and rapidness in disassembly.
In an embodiment, the separation metering experiment device of marine natural gas hydrate further comprises: and a thermometer 111 connected to the temperature sensor 105 for observing the temperature data in the sample experimental vessel 101 in real time. Thermometer 111 displays temperature data during heating of the sample experimental tank 101.
In an embodiment, the separation metering experiment device of marine natural gas hydrate further comprises: and the pressure gauge 112 is connected with the pressure sensor 106 and is used for observing the pressure data in the sample experimental kettle 101 in real time. Pressure gauge 112 displays pressure data during heating of the sample tank 101.
In the embodiment, the sample experiment kettle 101 in the marine natural gas hydrate separation and measurement experiment device is made of sapphire glass. The sapphire glass has high temperature resistance, good heat conduction, high hardness and good chemical stability, can prevent chemical corrosion, and can observe the experimental phenomenon change in the pipe in the experimental process.
In an embodiment, in the marine natural gas hydrate separation metering experimental device, the control device further comprises: a first valve 113, disposed on a first pipeline connecting the gas flowmeter 103 and the first tank opening, for controlling the first pipeline to be communicated or blocked; a second valve 114 is disposed on a second line connecting the liquid metering pump 104 to the second tank port for controlling the second line to communicate or block.
In an embodiment, in the marine natural gas hydrate separation metering experimental device, the control device further comprises: a third valve 115, disposed on a third pipeline connecting the PC end 108 and the gas flowmeter 103, for controlling the third pipeline to be communicated or blocked; and a fourth valve 116, disposed on a fourth line connecting the PC end 108 and the liquid metering pump 104, for controlling the fourth line to communicate or block.
In an embodiment, in the marine natural gas hydrate separation metering experimental device, the control device further comprises: a fifth valve 117, disposed on a fifth pipeline connecting the PC end 108 and the temperature sensor 105, for controlling the fifth pipeline to be communicated or blocked; a sixth valve 118 is disposed on a sixth line connecting the PC end 108 and the pressure sensor 106, for controlling the sixth line to communicate or block.
In an embodiment, one or any combination of the first valve 113, the second valve 114, the third valve 115, the fourth valve 116, the fifth valve 117 and the sixth valve 118 of the marine natural gas hydrate separation and metering experiment device is an electric valve.
In the concrete implementation, firstly, sample preparation is carried out, a marine natural gas hydrate sample is put into a sample experiment kettle 101, the sealing condition of equipment is checked, after the checking is finished, a computer transmits instructions to a control cabinet 107 through a pipeline of the computer and the control cabinet 107, the control cabinet 107 is connected with an outer heating sleeve of the kettle body, namely, an experiment operator opens the heating sleeve through the control cabinet 107 to enable the heating sleeve to be in an open state, the marine natural gas hydrate sample in the sample experiment kettle 101 is heated, and all connected valves (a first valve 113, a second valve 114, a third valve 115 and a fourth valve 116, fifth valve 117, sixth valve 118) is open. The marine natural gas hydrate sample in the kettle is heated to be decomposed into a gas phase and a liquid phase, the gas phase decomposed by the marine natural gas hydrate enters the gas flowmeter 103 through the first kettle opening of the sample experiment kettle 101, the gas flow rate decomposed by the hydrate sample is measured through the gas flowmeter 103, the liquid amount decomposed by the marine natural gas hydrate sample enters the liquid metering pump 104 from the second kettle opening of the sample experiment kettle 101 and the liquid metering pump 104 pipeline, and the computer records the gas amount and the liquid amount decomposed by the marine natural gas hydrate sample in real time and simultaneously records the temperature and pressure data change in the sample experiment kettle 101. Specifically, the gas flow meter 103 measures the gas flow data at the first kettle opening, the liquid flow data at the second kettle opening, the temperature sensor 105 measures the temperature data inside the sample experiment kettle 101, the pressure sensor 106 measures the pressure data inside the sample experiment kettle 101, and the PC end 108 records the gas flow data at the first kettle opening, the liquid flow data at the second kettle opening, the temperature data and the pressure data inside the sample experiment kettle 101. That is, nodes are divided according to the pressure change of the marine natural gas hydrate sample, and the flow rate of the marine natural gas hydrate sample dissolved into the gas phase and the liquid phase is measured by the gas flow meter 103 and the liquid metering pump 104 of the sample experiment kettle 101. And according to the change of the temperature observed by the reading of the thermometer, selecting a time interval as a calculation node of the next step, and further analyzing and obtaining the gas content and the decomposition rate of the marine natural gas hydrate sample. The gas content of the marine natural gas hydrate sample can be calculated by using a drainage method, a vacuum volumetric method or a gravimetric method, wherein the natural gas hydrate sample decomposition rate is obtained by using the natural gas hydrate substance amount at the initial time of the natural gas hydrate decomposition and real-time temperature and pressure data after the decomposition is started. According to the embodiment of the invention, the change of the pressure in the experimental sample kettle is observed through a computer, and the stable state of the marine natural gas hydrate sample can be judged and the gas content of the marine natural gas hydrate sample can be calculated by combining the parameters such as the temperature in the kettle body, the gas flowmeter and the like, so that an experimental foundation is provided for drilling and production of the marine natural gas hydrate. And, the decomposition condition of the marine natural gas hydrate sample is recorded through the gas flowmeter 103 and the liquid metering pump 104, the nodes are divided according to the change of the temperature and the pressure, and the decomposition rate of the hydrate sample is calculated when the natural gas hydrate sample is initially decomposed. The flow process of the hydrate in the shaft can be accurately researched by scientific researchers, and secondary generation and blockage of the ocean natural gas hydrate in the shaft can be prevented in the deep sea drilling and production process in the later period. In addition, in the embodiment of the invention, the gas phase decomposed by the marine natural gas hydrate enters the gas flowmeter 103 through the sapphire glass tube of the sample experimental kettle 101, and the liquid phase decomposed by the hydrate flows into the liquid phase metering pump through the connecting pipeline of the sample experimental kettle 101 and the liquid metering pump 104, so that the experimental purpose of gas-liquid separation metering of the marine natural gas hydrate is achieved, and the device has the advantages of simple structure, reliable performance and convenience in operation.
Based on the same inventive concept, the embodiment of the invention also provides a method for metering marine natural gas hydrate by using the device, as described in the following embodiment. Because the principles of solving the problems are similar to that of the separation metering experimental device of the marine natural gas hydrate, the implementation of the method can be referred to the implementation of the device, and the repetition is omitted.
Fig. 2 is a flow chart of a method for metering sea natural gas hydrate according to an embodiment of the present invention, as shown in fig. 2, the method includes:
step 201, obtaining a marine natural gas hydrate sample, and placing the marine natural gas hydrate sample into a sample experimental kettle;
Step 202, a control cabinet sets the heating device to be in an on state, and the heating device heats the marine natural gas hydrate sample in the sample experimental kettle;
Step 203, a gas flowmeter measures gas flow data at the first kettle opening, a liquid metering pump measures liquid flow data at the second kettle opening, a temperature sensor measures temperature data inside the sample experimental kettle, a pressure sensor measures pressure data inside the sample experimental kettle, a PC end records gas flow data at the first kettle opening, liquid flow data at the second kettle opening, and temperature data and pressure data inside the sample experimental kettle.
In summary, the experimental device for separating and metering marine natural gas hydrate provided by the embodiment of the invention comprises: the sample experiment kettle is used for containing marine natural gas hydrate samples, a first kettle opening is formed in the top of the sample experiment kettle, and a second kettle opening is formed in the bottom of the sample experiment kettle; the heating device is sleeved outside the sample experimental kettle and is used for heating the marine natural gas hydrate sample contained in the sample experimental kettle; the gas flowmeter is connected with the first kettle opening of the sample experimental kettle and is used for measuring gas flow data of the marine natural gas hydrate sample in the sample experimental kettle decomposed at the first kettle opening; the liquid metering pump is connected with the second kettle opening of the sample experimental kettle and is used for measuring liquid flow data of the ocean natural gas hydrate sample in the sample experimental kettle decomposed at the second kettle opening; the temperature sensor is arranged in the sample experimental kettle and is used for measuring temperature data in the sample experimental kettle; the pressure sensor is arranged in the sample experimental kettle and is used for measuring pressure data in the sample experimental kettle; the control equipment comprises a control cabinet and a PC end, wherein the control cabinet is connected with the heating device and used for controlling the heating device to be in an on state or an off state, the PC end is connected with the gas flowmeter, the liquid metering pump, the temperature sensor and the pressure sensor and used for recording gas flow data at the first kettle opening and liquid flow data at the second kettle opening, and temperature data and pressure data inside the sample experimental kettle are recorded. According to the embodiment of the invention, the marine natural gas hydrate sample is obtained and put into the sample experimental kettle, the heating device is set to be in an open state by the control cabinet, the marine natural gas hydrate sample in the sample experimental kettle is heated by the heating device, the structural change of the ore body of the hydrate particles in an unstable state can be effectively simulated by arranging the heating device outside the sample experimental kettle, then the gas flow data at the first kettle opening is measured by the gas flowmeter, the liquid flow data at the second kettle opening is measured by the liquid metering pump, the temperature data in the sample experimental kettle is measured by the temperature sensor, the pressure data in the sample experimental kettle is measured by the pressure sensor, and the record is carried out at the PC end, so that the hydrate sample is decomposed into a liquid phase and a gas phase by the hydrate sample experimental kettle, the flow of the gas and the flow of the liquid are respectively measured, the measurement of the component content of the marine natural gas hydrate in the unstable state is realized, the change of the drilling fluid flow denaturation and the flow parameters of a shaft is conveniently mastered, and a theoretical and experimental foundation is provided for the later marine natural gas hydrate drilling.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The utility model provides a separation metering experimental apparatus of ocean natural gas hydrate which characterized in that includes:
The sample experiment kettle is used for containing marine natural gas hydrate samples, a first kettle opening is formed in the top of the sample experiment kettle, and a second kettle opening is formed in the bottom of the sample experiment kettle;
the heating device is sleeved outside the sample experimental kettle and is used for heating the marine natural gas hydrate sample contained in the sample experimental kettle;
the gas flowmeter is connected with the first kettle opening of the sample experimental kettle and is used for measuring gas flow data of the marine natural gas hydrate sample in the sample experimental kettle decomposed at the first kettle opening;
The liquid metering pump is connected with the second kettle opening of the sample experimental kettle and is used for measuring liquid flow data of the ocean natural gas hydrate sample in the sample experimental kettle decomposed at the second kettle opening;
the temperature sensor is arranged in the sample experimental kettle and is used for measuring temperature data in the sample experimental kettle;
the pressure sensor is arranged in the sample experimental kettle and is used for measuring pressure data in the sample experimental kettle;
The control equipment comprises a control cabinet and a PC end, wherein the control cabinet is connected with the heating device and used for controlling the heating device to be in an on state or an off state, the PC end is connected with the gas flowmeter, the liquid metering pump, the temperature sensor and the pressure sensor and used for recording gas flow data at the first kettle opening and liquid flow data at the second kettle opening, and temperature data and pressure data inside the sample experimental kettle are recorded.
2. The marine natural gas hydrate separation metering experiment device according to claim 1, further comprising:
the first sealing flange is used for sealing a first kettle opening at the top of the sample experimental kettle;
and the second sealing flange is used for sealing a second kettle opening at the bottom of the sample experimental kettle.
3. The marine natural gas hydrate separation metering experiment device according to claim 1, further comprising:
And the thermometer is connected with the temperature sensor and is used for observing the temperature data in the sample experimental kettle in real time.
4. A marine natural gas hydrate separation metering experiment device according to any one of claims 1 or 3, further comprising:
And the pressure gauge is connected with the pressure sensor and is used for observing the pressure data in the sample experimental kettle in real time.
5. The experimental device for separating and metering marine natural gas hydrate according to claim 1, wherein the sample experimental kettle is made of sapphire glass.
6. The marine natural gas hydrate separation metering experiment device according to claim 1, wherein the control apparatus further comprises:
the first valve is arranged on a first pipeline connecting the gas flowmeter with the first kettle opening and is used for controlling the first pipeline to be communicated or blocked;
the second valve is arranged on a second pipeline connecting the liquid metering pump and the second kettle opening and used for controlling the second pipeline to be communicated or blocked.
7. The marine natural gas hydrate separation metering experiment device according to claim 6, wherein the control apparatus further comprises:
the third valve is arranged on a third pipeline connecting the PC end and the gas flowmeter and used for controlling the third pipeline to be communicated or blocked;
and the fourth valve is arranged on a fourth pipeline connecting the PC end and the liquid metering pump and used for controlling the fourth pipeline to be communicated or blocked.
8. The marine natural gas hydrate separation metering experiment device according to claim 7, wherein the control apparatus further comprises:
the fifth valve is arranged on a fifth pipeline connecting the PC end and the temperature sensor and is used for controlling the fifth pipeline to be communicated or blocked;
and the sixth valve is arranged on a sixth pipeline connecting the PC end and the pressure sensor and used for controlling the sixth pipeline to be communicated or blocked.
9. The experimental device for the separation and metering of marine natural gas hydrate according to claim 8, wherein one or any combination of the first valve, the second valve, the third valve, the fourth valve, the fifth valve and the sixth valve is an electric valve.
10. A method of conducting a marine natural gas hydrate separation metering experiment using the apparatus of any one of claims 1-9, comprising:
Obtaining a marine natural gas hydrate sample, and placing the marine natural gas hydrate sample into a sample experimental kettle;
The control cabinet sets the heating device in an on state, and the heating device heats the marine natural gas hydrate sample in the sample experiment kettle;
The gas flow meter measures the gas flow data of first cauldron mouth department, and the liquid metering pump measures the liquid flow data of second cauldron mouth department, temperature sensor measures the inside temperature data of sample experiment cauldron, pressure sensor measures the inside pressure data of sample experiment cauldron, PC end record the gas flow data of first cauldron mouth department in the sample experiment cauldron, the liquid flow data of second cauldron mouth department, the inside temperature data and the pressure data of sample experiment cauldron.
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| CN105717271B (en) * | 2016-03-11 | 2018-01-16 | 西南石油大学 | A kind of ocean gas hydrate solid state fluidizing extracting experiment circuit system |
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| CN103645285A (en) * | 2013-12-17 | 2014-03-19 | 中国海洋石油总公司 | Visualized natural gas hydrate simulation test device and method |
| CN105259003A (en) * | 2015-11-25 | 2016-01-20 | 中国科学院广州能源研究所 | Experiment device and method for synthesizing marine natural gas hydrate sample |
| CN109115984A (en) * | 2018-09-10 | 2019-01-01 | 西南石油大学 | The non-diagenesis hydrate solid state fluidizing exploitation characteristics of decomposition test device in ocean and method |
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