CN114062640A - Separation and measurement experimental device and method for marine natural gas hydrate - Google Patents
Separation and measurement experimental device and method for marine natural gas hydrate Download PDFInfo
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- CN114062640A CN114062640A CN202010743917.6A CN202010743917A CN114062640A CN 114062640 A CN114062640 A CN 114062640A CN 202010743917 A CN202010743917 A CN 202010743917A CN 114062640 A CN114062640 A CN 114062640A
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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 120
- 238000000926 separation method Methods 0.000 title claims abstract description 29
- 238000005259 measurement Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims description 18
- 238000002474 experimental method Methods 0.000 claims abstract description 136
- 239000007789 gas Substances 0.000 claims abstract description 74
- 239000007788 liquid Substances 0.000 claims abstract description 70
- 238000010438 heat treatment Methods 0.000 claims abstract description 54
- 238000004891 communication Methods 0.000 claims description 11
- 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
- 230000008859 change Effects 0.000 abstract description 25
- 238000005553 drilling Methods 0.000 abstract description 25
- 239000002245 particle Substances 0.000 abstract description 13
- 239000012530 fluid Substances 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 description 12
- 238000000354 decomposition reaction Methods 0.000 description 10
- 239000012071 phase Substances 0.000 description 8
- 239000007791 liquid phase Substances 0.000 description 7
- 230000036571 hydration Effects 0.000 description 6
- 238000006703 hydration reaction Methods 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Natural products C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000003345 natural gas Substances 0.000 description 4
- -1 natural gas hydrates Chemical class 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005243 fluidization Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 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
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 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
- 239000011435 rock Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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- 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
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Abstract
The invention discloses a separation and measurement experimental device and a separation and measurement experimental method for a marine natural gas hydrate, wherein the device comprises: the sample experiment kettle is used for containing an ocean natural gas hydrate sample, 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 experiment kettle and used for heating the marine natural gas hydrate sample; the gas flowmeter is used for measuring gas flow data at the first kettle mouth; 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 the temperature and pressure data in the sample experiment kettle; the control equipment comprises a control cabinet and a PC (personal computer) end, wherein the control cabinet is used for controlling the heating device to be in an opening state or a closing 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 ore body structure change of hydrate particles under an unstable state and master the rheological property of the drilling fluid and the change of the flow parameters of a shaft.
Description
Technical Field
The invention relates to the technical field of drilling and production of marine natural gas hydrates, in particular to a device and a method for a separation and measurement experiment of marine natural gas hydrates.
Background
The natural gas hydrate resource amount is abundant, and is mainly distributed in land permafrost zones and seabed sediments at the periphery of land margins, wherein the marine natural gas hydrate resource amount is about more than 100 times of the land permafrost zones. The natural gas hydrate on the shallow surface layer of the seabed is kept in a stable state under the original temperature and pressure environment of the seabed. However, with the development of the offshore oil and gas drilling and production technology, hydrate pilot production which has been implemented in the world is performed in diagenetic hydrate ore bodies, and when broken hydrate particles enter a shaft, the stable state of the hydrate particles is affected along with the changes of pressure and temperature, so that the greatest threat is caused to the drilling and production construction safety. On the other hand, the drill cutting particles of the hydrate layer are different from the rock cutting particles in the conventional marine drilling process, and can be decomposed due to the change of the temperature and the pressure of the shaft in the annular upward-returning process of the drilling fluid while drilling, the decomposition and heat absorption effects of the hydrate drill cutting particles can further influence the change of the hydrate ore body structure, the gas-liquid two phases in the whole shaft can be changed, and the rheological property of the drilling fluid, the change of the flow parameters of the shaft and the marine drilling safety construction can be further influenced. Therefore, it is necessary to study the gas hydrate in the unstable state.
At present, the existing research objects mainly aim at a natural gas hydrate generation physical simulation experiment system and a solid-state fluidization mining machine, the ore body structure change of hydrate particles in an unstable state is difficult to simulate, and the rheological property of drilling fluid and the change of shaft flow parameters cannot be mastered, so that potential safety hazards exist in the later-stage marine natural gas hydrate drilling.
Disclosure of Invention
The embodiment of the invention provides a separation measurement experimental device of a marine natural gas hydrate, which is used for simulating ore body structure change of hydrate particles in an unstable state, measuring the component content of the marine natural gas hydrate in the unstable state, mastering the rheological property of drilling fluid and the change of shaft flow parameters and providing theoretical and experimental basis for later-stage drilling and production of the marine natural gas hydrate, and comprises the following components:
the device comprises a sample experiment kettle, a first kettle opening and a second kettle opening, wherein the sample experiment kettle is used for containing a marine natural gas hydrate sample;
the heating device is sleeved outside the sample experiment kettle and used for heating the marine natural gas hydrate sample contained in the sample experiment kettle;
the gas flow meter is connected with the first kettle opening of the sample experiment kettle and is used for measuring gas flow data of the ocean natural gas hydrate sample in the sample experiment 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 experiment kettle and used for measuring the temperature data in the sample experiment kettle;
the pressure sensor is arranged in the sample experiment kettle and used for measuring pressure data inside the sample experiment kettle;
the control device comprises a control cabinet and a PC (personal computer) end, wherein the control cabinet is connected with the heating device and used for controlling the heating device to be in an opening state or a closing 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 port and liquid flow data at the second kettle port, and the temperature data and the pressure data inside the sample experiment kettle.
The embodiment of the invention provides a method for metering marine natural gas hydrate, which is used for simulating ore body structure change of hydrate particles in an unstable state, measuring the component content of the marine natural gas hydrate in the unstable state, mastering the rheological property of drilling fluid and the change of shaft flow parameters and providing theoretical and experimental basis for later-stage drilling and production of the marine natural gas hydrate, and comprises the following steps:
obtaining a marine natural gas hydrate sample, and putting the marine natural gas hydrate sample into a sample experiment kettle;
the control cabinet sets the heating device to be in an open state, and the heating device heats the marine natural gas hydrate sample in the sample experiment kettle;
gas flowmeter measures the gas flow data of first cauldron mouth department, and the liquid metering pump is measured 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 aiming at a natural gas hydrate generation physical simulation experiment system and a solid-state fluidization mining machine in the prior art, the marine natural gas hydrate separation measurement experiment device provided by the embodiment of the invention comprises the following components: the device comprises a sample experiment kettle, a first kettle opening and a second kettle opening, wherein the sample experiment kettle is used for containing a marine natural gas hydrate sample; the heating device is sleeved outside the sample experiment kettle and used for heating the marine natural gas hydrate sample contained in the sample experiment kettle; the gas flow meter is connected with the first kettle opening of the sample experiment kettle and is used for measuring gas flow data of the ocean natural gas hydrate sample in the sample experiment 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 experiment kettle and used for measuring the temperature data in the sample experiment kettle; the pressure sensor is arranged in the sample experiment kettle and used for measuring pressure data inside the sample experiment kettle; the control device comprises a control cabinet and a PC (personal computer) end, wherein the control cabinet is connected with the heating device and used for controlling the heating device to be in an opening state or a closing 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 port and liquid flow data at the second kettle port, and the temperature data and the pressure data inside the sample experiment kettle. The embodiment of the invention obtains a marine natural gas hydrate sample, and the marine natural gas hydrate sample is placed in a sample experiment kettle, a control cabinet sets a heating device to be in an open state, the heating device heats the marine natural gas hydrate sample in the sample experiment kettle, the change of an ore body structure of hydrate particles in an unstable state can be effectively simulated by setting the heating device outside the sample experiment kettle, then gas flow data at a first kettle opening is measured by a gas flow meter, liquid flow data at a second kettle opening is measured by a liquid flow meter, temperature data inside the sample experiment kettle is measured by a temperature sensor, pressure data inside the sample experiment kettle is measured by a pressure sensor and is recorded at a PC end, thus the hydration is decomposed into a liquid phase and a gas phase by the hydration experiment kettle, the flow of the gas and the flow of the liquid are respectively measured, and the component content of the marine natural gas hydrate in the unstable state is measured, the method is beneficial to mastering the rheological property of the drilling fluid and the change of the flow parameters of the shaft, and provides theoretical and experimental basis for the drilling and production of the ocean natural gas hydrate in the later period.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. In the drawings:
FIG. 1 is a diagram of a separation and measurement experiment apparatus for marine natural gas hydrate according to an embodiment of the present invention;
FIG. 2 is a flow chart of an experimental method for separation and measurement of marine natural gas hydrates in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
In order to simulate the ore body structure change of hydrate particles in an unstable state, measure the component content of a marine natural gas hydrate in the unstable state, grasp the rheological property of drilling fluid and the change of well bore flowing parameters, and provide theoretical and experimental basis for drilling and production of the marine natural gas hydrate in the later period, an embodiment of the invention provides a marine natural gas hydrate separation and measurement experimental device, as shown in fig. 1, the device can comprise:
the device comprises a sample experiment kettle 101, a first kettle opening and a second kettle opening, wherein the sample experiment kettle 101 is used for containing a marine natural gas hydrate sample, the top of the sample experiment kettle 101 is provided with the first kettle opening, and the bottom of the sample experiment kettle 101 is provided with the second kettle opening;
the heating device 102 is sleeved outside the sample experiment kettle 101 and used for heating the marine natural gas hydrate sample contained in the sample experiment kettle 101;
the gas flow meter 103 is connected with the first kettle opening of the sample experimental kettle 101 and is 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;
the liquid metering pump 104 is connected with the second kettle opening of the sample experimental kettle 101 and is used for measuring liquid flow data of the ocean natural gas hydrate sample decomposition at the second kettle opening in the sample experimental kettle 101;
the temperature sensor 105 is arranged in the sample experiment kettle 101 and used for measuring temperature data inside the sample experiment kettle 101;
the pressure sensor 106 is arranged in the sample experiment kettle 101 and used for measuring pressure data inside the sample experiment kettle 101;
the control device comprises a control cabinet 107 and a PC (personal computer) 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 opening state or a closing state, and 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, liquid flow data at the second kettle opening, and temperature data and pressure data inside the sample experimental kettle 101.
As shown in fig. 1, the marine natural gas hydrate separation and measurement experimental apparatus provided in the embodiment of the present invention includes: the device comprises a sample experiment kettle, a first kettle opening and a second kettle opening, wherein the sample experiment kettle is used for containing a marine natural gas hydrate sample; the heating device is sleeved outside the sample experiment kettle and used for heating the marine natural gas hydrate sample contained in the sample experiment kettle; the gas flow meter is connected with the first kettle opening of the sample experiment kettle and is used for measuring gas flow data of the ocean natural gas hydrate sample in the sample experiment 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 experiment kettle and used for measuring the temperature data in the sample experiment kettle; the pressure sensor is arranged in the sample experiment kettle and used for measuring pressure data inside the sample experiment kettle; the control device comprises a control cabinet and a PC (personal computer) end, wherein the control cabinet is connected with the heating device and used for controlling the heating device to be in an opening state or a closing 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 port and liquid flow data at the second kettle port, and the temperature data and the pressure data inside the sample experiment kettle. The embodiment of the invention obtains a marine natural gas hydrate sample, and the marine natural gas hydrate sample is placed in a sample experiment kettle, a control cabinet sets a heating device to be in an open state, the heating device heats the marine natural gas hydrate sample in the sample experiment kettle, the change of an ore body structure of hydrate particles in an unstable state can be effectively simulated by setting the heating device outside the sample experiment kettle, then gas flow data at a first kettle opening is measured by a gas flow meter, liquid flow data at a second kettle opening is measured by a liquid flow meter, temperature data inside the sample experiment kettle is measured by a temperature sensor, pressure data inside the sample experiment kettle is measured by a pressure sensor and is recorded at a PC end, thus the hydration is decomposed into a liquid phase and a gas phase by the hydration experiment kettle, the flow of the gas and the flow of the liquid are respectively measured, and the component content of the marine natural gas hydrate in the unstable state is measured, the method is beneficial to mastering the rheological property of the drilling fluid and the change of the flow parameters of the shaft, and provides theoretical and experimental basis for the drilling and production of the ocean natural gas hydrate in the later period.
In the embodiment, the sample experiment kettle 101 in the marine natural gas hydrate separation and metering experiment device is used for containing a marine natural gas hydrate sample, a first kettle opening is arranged at the top of the sample experiment kettle 101, and a second kettle opening is arranged at the bottom of the sample experiment kettle 101. The heating device 102 is sleeved outside the sample experimental kettle 101 and 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. Gas flowmeter 103 is connected with the first cauldron mouth of sample experiment cauldron 101 for the gaseous flow data of ocean natural gas hydrate sample decomposition in first cauldron mouth department in measuring sample experiment cauldron 101, liquid metering pump 104 is connected with the second cauldron mouth of sample experiment cauldron 101, a liquid flow data of ocean natural gas hydrate sample decomposition in second cauldron mouth department in measuring sample experiment cauldron 101, liquid metering pump 104 can measure the liquid flow that ocean natural gas hydrate decomposes out, and carry out the record to the liquid flow data of second cauldron mouth department through connecting PC end 108, can also control the liquid flow of second cauldron mouth department through PC end 108 in addition. 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 disposed in the sample lab kettle 101 for measuring pressure data inside the sample lab kettle 101. Specifically, the pressure at the gas-liquid interface in the sample experiment tank 101 can 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 experimental apparatus for separating and measuring marine natural gas hydrate further includes: the first sealing flange 109 is used for sealing a first kettle opening at the top of the sample experiment kettle 101; and the second sealing flange 110 is used for sealing the second kettle mouth at the bottom of the sample experimental kettle 101. Compared with other sealing devices, the sealing flange has the advantages of being convenient and fast to disassemble.
In an embodiment, the experimental apparatus for separating and measuring marine natural gas hydrate further includes: and the thermometer 111 is connected with the temperature sensor 105 and is used for observing the temperature data inside the sample experimental kettle 101 in real time. The thermometer 111 displays temperature data during heating of the sample kettle 101.
In an embodiment, the experimental apparatus for separating and measuring marine natural gas hydrate further includes: and the pressure gauge 112 is connected with the pressure sensor 106 and is used for observing the pressure data inside the sample experimental kettle 101 in real time. The pressure gauge 112 displays the pressure data during the heating process of the sample experimental kettle 101.
In the embodiment, the sample experimental kettle 101 in the marine natural gas hydrate separation and measurement experimental apparatus is made of sapphire glass. Sapphire glass is high temperature resistant, and the heat conduction is good, and hardness is high and chemical stability is good can prevent chemical corrosion, and can observe intraductal experimental phenomenon and change in the experimentation.
In an embodiment, in the marine natural gas hydrate separation and measurement experiment apparatus, the control device further includes: a first valve 113, which is arranged on a first pipeline connecting the gas flowmeter 103 and the first kettle mouth, and is used for controlling the communication or the blockage of the first pipeline; and a second valve 114 arranged on a second pipeline connecting the liquid metering pump 104 with the second kettle mouth and used for controlling the communication or the blockage of the second pipeline.
In an embodiment, in the marine natural gas hydrate separation and measurement experiment apparatus, the control device further includes: a third valve 115 provided on a third line connecting the PC terminal 108 and the gas flow meter 103, for controlling communication or blocking of the third line; and a fourth valve 116, which is disposed on the fourth pipeline connecting the PC end 108 and the liquid metering pump 104, and is used for controlling the communication or blocking of the fourth pipeline.
In an embodiment, in the marine natural gas hydrate separation and measurement experiment apparatus, the control device further includes: a fifth valve 117 disposed on a fifth pipeline connecting the PC terminal 108 and the temperature sensor 105, for controlling the communication or blocking of the fifth pipeline; and a sixth valve 118 disposed on the sixth pipeline connecting the PC end 108 and the pressure sensor 106 for controlling the communication or blocking of the sixth pipeline.
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 experimental apparatus is an electrically operated valve.
In specific implementation, firstly, sample preparation is performed, a marine natural gas hydrate sample is placed in the sample experiment kettle 101, the sealing condition of equipment is checked, after the checking is completed, the computer transmits an instruction to the control cabinet 107 through a pipeline of the computer and the control cabinet 107, the control cabinet 107 is connected with the kettle body outer layer heating jacket, namely, an experiment operator opens the heating jacket through the control cabinet 107 to enable the heating jacket to be in an open state, the marine natural gas hydrate sample in the sample experiment kettle 101 is heated, and the connected valves (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) are opened. The ocean natural gas hydrate sample in the kettle is heated and begins to be decomposed into a gas phase and a liquid phase, the gas phase decomposed by the ocean natural gas hydrate enters the gas flowmeter 103 through the first kettle opening of the sample experiment kettle 101, the gas flowmeter 103 measures the decomposed gas amount of the hydrate sample, the decomposed liquid amount of the ocean 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, the computer records the decomposed gas amount and liquid amount of the ocean 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 gas flow data at the first kettle port, the liquid metering pump 104 measures liquid flow data at the second kettle port, the temperature sensor 105 measures temperature data inside the sample experimental kettle 101, the pressure sensor 106 measures pressure data inside the sample experimental kettle 101, the PC end 108 records gas flow data at the first kettle port, liquid flow data at the second kettle port, temperature data inside the sample experimental kettle 101, and pressure data. That is, the 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 using the gas flow meter 103 and the liquid metering pump 104 of the sample experimental kettle 101. And observing the change of the temperature according to the reading of the thermometer, and selecting a time interval as a calculation node of the next step, so that the gas content and the decomposition rate of the marine natural gas hydrate sample can be analyzed and obtained. The gas void fraction of the marine natural gas hydrate sample can be calculated by a drainage method, a vacuum-volumetric method or a gravimetric method, and the decomposition rate of the natural gas hydrate sample is obtained by the amount of natural gas hydrate substances at the beginning of decomposition of the natural gas hydrate and real-time temperature pressure data after the start of the decomposition. According to the embodiment of the invention, the change of the pressure in the experimental sample kettle is observed by the 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 temperature in the kettle body, the gas flowmeter and other parameters, so that an experimental basis 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 by 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 according to the amount of the substance when the natural gas hydrate sample is initially decomposed. Scientific researchers can more accurately research the flowing process of the hydrate in the shaft, and can prevent the secondary generation and blockage of the marine natural gas hydrate in the shaft 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 and metering of the marine natural gas hydrate is achieved.
Based on the same inventive concept, the embodiment of the invention also provides a method for metering the marine natural gas hydrate by using the device, which is described in the following embodiment. Because the principles for solving the problems are similar to those of the experimental device for the separation and measurement of the marine natural gas hydrate, the implementation of the method can be referred to the implementation of the device, and repeated details are not repeated.
Fig. 2 is a flowchart of a method for metering marine natural gas hydrates according to an embodiment of the present invention, as shown in fig. 2, the method includes:
In summary, the experimental apparatus for separating and measuring the marine natural gas hydrate provided by the embodiment of the present invention includes: the device comprises a sample experiment kettle, a first kettle opening and a second kettle opening, wherein the sample experiment kettle is used for containing a marine natural gas hydrate sample; the heating device is sleeved outside the sample experiment kettle and used for heating the marine natural gas hydrate sample contained in the sample experiment kettle; the gas flow meter is connected with the first kettle opening of the sample experiment kettle and is used for measuring gas flow data of the ocean natural gas hydrate sample in the sample experiment 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 experiment kettle and used for measuring the temperature data in the sample experiment kettle; the pressure sensor is arranged in the sample experiment kettle and used for measuring pressure data inside the sample experiment kettle; the control device comprises a control cabinet and a PC (personal computer) end, wherein the control cabinet is connected with the heating device and used for controlling the heating device to be in an opening state or a closing 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 port and liquid flow data at the second kettle port, and the temperature data and the pressure data inside the sample experiment kettle. The embodiment of the invention obtains a marine natural gas hydrate sample, and the marine natural gas hydrate sample is placed in a sample experiment kettle, a control cabinet sets a heating device to be in an open state, the heating device heats the marine natural gas hydrate sample in the sample experiment kettle, the change of an ore body structure of hydrate particles in an unstable state can be effectively simulated by setting the heating device outside the sample experiment kettle, then gas flow data at a first kettle opening is measured by a gas flow meter, liquid flow data at a second kettle opening is measured by a liquid flow meter, temperature data inside the sample experiment kettle is measured by a temperature sensor, pressure data inside the sample experiment kettle is measured by a pressure sensor and is recorded at a PC end, thus the hydration is decomposed into a liquid phase and a gas phase by the hydration experiment kettle, the flow of the gas and the flow of the liquid are respectively measured, and the component content of the marine natural gas hydrate in the unstable state is measured, the method is beneficial to mastering the rheological property of the drilling fluid and the change of the flow parameters of the shaft, and provides theoretical and experimental basis for the drilling and production of the ocean natural gas hydrate in the later period.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a marine natural gas hydrate's separation measurement experimental apparatus which characterized in that includes:
the device comprises a sample experiment kettle, a first kettle opening and a second kettle opening, wherein the sample experiment kettle is used for containing a marine natural gas hydrate sample;
the heating device is sleeved outside the sample experiment kettle and used for heating the marine natural gas hydrate sample contained in the sample experiment kettle;
the gas flow meter is connected with the first kettle opening of the sample experiment kettle and is used for measuring gas flow data of the ocean natural gas hydrate sample in the sample experiment 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 experiment kettle and used for measuring the temperature data in the sample experiment kettle;
the pressure sensor is arranged in the sample experiment kettle and used for measuring pressure data inside the sample experiment kettle;
the control device comprises a control cabinet and a PC (personal computer) end, wherein the control cabinet is connected with the heating device and used for controlling the heating device to be in an opening state or a closing 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 port and liquid flow data at the second kettle port, and the temperature data and the pressure data inside the sample experiment kettle.
2. The marine natural gas hydrate separation and metering experimental facility as claimed in claim 1, further comprising:
the first sealing flange is used for sealing a first kettle opening at the top of the sample experiment kettle;
and the second sealing flange is used for sealing a second kettle opening at the bottom of the sample experiment kettle.
3. The marine natural gas hydrate separation and metering experimental facility as claimed in claim 1, further comprising:
and the thermometer is connected with the temperature sensor and is used for observing the temperature data in the sample experiment kettle in real time.
4. The marine natural gas hydrate separation and metering experiment device as claimed in 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 experiment kettle in real time.
5. The marine natural gas hydrate separation and metering experimental device as claimed in claim 1, wherein the sample experimental kettle is made of sapphire glass.
6. The marine natural gas hydrate separation and metering experimental apparatus as claimed in claim 1, wherein the control device further comprises:
the first valve is arranged on a first pipeline connecting the gas flowmeter and the first kettle mouth and used for controlling the communication or the blockage of the first pipeline;
and the second valve is arranged on a second pipeline connecting the liquid metering pump and the second kettle opening and used for controlling the communication or the blockage of the second pipeline.
7. The marine gas hydrate separation and metering experimental facility as claimed in claim 6, wherein the control device 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 is used for controlling the communication or the blockage of the fourth pipeline.
8. The marine gas hydrate separation and metering experimental facility as claimed in claim 7, wherein the control device further comprises:
the fifth valve is arranged on a fifth pipeline which is connected with the PC end and the temperature sensor and is used for controlling the communication or the blockage of the fifth pipeline;
and the sixth valve is arranged on a sixth pipeline connecting the PC end and the pressure sensor and used for controlling the communication or the blockage of the sixth pipeline.
9. The marine natural gas hydrate separation and metering experiment device as claimed in 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 electrically operated valve.
10. A method for conducting a marine natural gas hydrate separation and metering experiment using the apparatus of any one of claims 1 to 9, comprising:
obtaining a marine natural gas hydrate sample, and putting the marine natural gas hydrate sample into a sample experiment kettle;
the control cabinet sets the heating device to be in an open state, and the heating device heats the marine natural gas hydrate sample in the sample experiment kettle;
gas flowmeter measures the gas flow data of first cauldron mouth department, and the liquid metering pump is measured 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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