CN115573708A - Assembled hydrate reservoir consolidation exploitation simulation reaction kettle and test device - Google Patents
Assembled hydrate reservoir consolidation exploitation simulation reaction kettle and test device Download PDFInfo
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- CN115573708A CN115573708A CN202211062012.8A CN202211062012A CN115573708A CN 115573708 A CN115573708 A CN 115573708A CN 202211062012 A CN202211062012 A CN 202211062012A CN 115573708 A CN115573708 A CN 115573708A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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Abstract
The invention discloses an assembled hydrate reservoir consolidation and exploitation simulation reaction kettle and a test device, wherein the assembled hydrate reservoir consolidation and exploitation simulation reaction kettle comprises a kettle body, an upper end cover, a lower end cover, a shaft and a sensor assembly; the kettle body is used for placing artificial seawater, methane or carbon dioxide gas, bacteria liquid and cementing liquid so as to form a hydrate reservoir in the kettle body, the kettle body comprises a plurality of kettle body units, and the kettle body units are sequentially stacked along the vertical direction so as to form a reaction cavity in a surrounding manner; the shaft provides a pressure reduction and production channel for the decomposition of a hydrate reservoir in the reaction cavity; the sensor assembly is arranged in the reaction kettle and used for acquiring the temperature, pressure, water content, hydrate saturation, deformation, strength and distribution of mineral components of the hydrate reservoir in the reinforcement-decomposition process. The invention provides an assembled reaction kettle, which is used for meeting related reactions of hydrate reservoirs under the conditions of different sizes of a kettle body.
Description
Technical Field
The invention relates to the technical field of hydrate research, in particular to an assembled hydrate reservoir consolidation and exploitation simulation reaction kettle and a test device.
Background
The natural gas hydrate is a novel energy source which is efficient, clean and huge in reserve, and the shortage of resources such as petroleum and natural gas can be relieved to a great extent by the development of the natural gas hydrate. In the process of exploiting the hydrate, the strength of the hydrate deposit is reduced, so that a shaft, a wellhead, a pipeline facility and an offshore platform buried in the deposit are easy to lose stability, and even large-area submarine stratum settlement, submarine landslide and other geological disasters occur. In order to realize safe and efficient exploitation of hydrate reservoirs, it is necessary to perform reinforcement and modification on hydrate-containing reservoirs so as to improve the strength and stability of the hydrate-containing reservoirs.
In recent years, in the field of geotechnical engineering, microbial induced calcium carbonate deposition (MICP) microbial technology is applied to soft soil foundation reinforcement, slope treatment and prevention of sandy soil liquefaction as a novel green and environment-friendly technology. However, few testing devices are used for reinforcing the natural gas hydrate reservoir through microorganisms and evaluating the mechanical properties of the reservoir, and the existing devices cannot observe the distribution and evolution rules of a reservoir pressure field, a temperature field, a deformation field, hydrate saturation and mineral content in the process of reinforcing and exploiting the natural gas hydrate reservoir through microorganisms in real time.
Therefore, in order to better study the influence law of the microbial reinforcement exploitation process on the physical property parameters of the hydrate reservoir model and the influence of the microbial reinforcement exploitation process on the hydrate exploitation process, a reaction kettle capable of observing the evolution law of the hydrate reservoir seepage field, the temperature field, the deformation field, the hydrate and mineral content distribution in the microbial reinforcement and natural gas hydrate reservoir exploitation process in real time is urgently needed to be provided; however, the reaction kettle used at present is of a fixed size, and cannot meet the reaction related to the hydrate reservoir under the condition that the reaction kettle has different sizes.
Disclosure of Invention
The invention mainly aims to provide an assembled hydrate reservoir reinforcement exploitation simulation reaction kettle, and aims to provide an assembled reaction kettle to meet the related reaction of a hydrate reservoir under the condition of different sizes of a kettle body.
In order to achieve the above object, the present invention provides an assembled hydrate reservoir consolidation and exploitation simulation reaction kettle, which comprises:
the reaction cavity is used for placing artificial seawater, methane or carbon dioxide gas, bacteria liquid and cementing liquid so as to form a hydrate reservoir in the reaction cavity;
the upper end cover is covered at the upper end of the uppermost kettle body unit in the kettle body and is provided with first injection ports and shaft external interfaces which are arranged at intervals;
the lower end cover is covered at the lower end of the kettle body unit positioned at the lowest part in the kettle body and is provided with a second injection port;
one end of the shaft is inserted into the kettle body through the shaft outer interface, and the shaft is provided with a production opening communicated with the reaction cavity so as to provide a pressure reduction and production channel for decomposition of a hydrate reservoir in the reaction cavity;
the sensor assembly is arranged on the kettle body and used for acquiring the temperature, pressure, water content, hydrate saturation, deformation, strength and distribution of mineral components of the hydrate reservoir in the reinforcement-decomposition process.
In an embodiment of the present invention, a first sealing ring is disposed between the upper end cover and the uppermost kettle unit in the kettle body.
In an embodiment of the present invention, a first annular groove is formed between the upper end cover and the uppermost kettle unit in the kettle body, and the first sealing ring is installed in the first annular groove.
In an embodiment of the present invention, a second sealing ring is disposed between the lower end cover and the lowest autoclave body unit in the autoclave body.
In an embodiment of the present invention, a second annular groove is formed between the lower end cover and the lowest autoclave body unit in the autoclave body, and the second sealing ring is installed in the second annular groove.
In an embodiment of the present invention, a third sealing ring is disposed between two adjacent kettle body units.
In an embodiment of the present invention, a third annular groove is formed between two adjacent kettle body units, and the third sealing ring is installed in the third annular groove.
In an embodiment of the present invention, a sealing rubber ring is disposed between the shaft and the shaft outer interface;
and/or the sensor assembly comprises a plurality of TDR probes which are distributed at intervals along the axial direction of the kettle body;
and/or the sensor assembly comprises a plurality of resistivity probes which are distributed at intervals along the axial direction of the kettle body;
and/or, the sensor subassembly includes pressure sensor and temperature sensor, pressure sensor with temperature sensor all is equipped with a plurality ofly, and is a plurality of pressure sensor and a plurality of temperature sensor all follows the axial interval distribution of the cauldron body.
In an embodiment of the invention, the assembled hydrate reservoir consolidation and exploitation simulation reaction kettle further comprises a constant temperature device, and the constant temperature device takes absolute ethyl alcohol as a circulating medium and is used for regulating and controlling the temperature in the reaction cavity.
The invention also provides a test device which comprises the assembled hydrate reservoir consolidation and exploitation simulation reaction kettle.
In the using process of the assembled hydrate reservoir reinforcing and mining simulation reaction kettle, artificial seawater, methane or carbon dioxide gas, bacterial liquid and cementing liquid can be added into a reaction cavity of the kettle body to form a hydrate reservoir in the reaction cavity, and the hydrate reservoir can be reinforced and decomposed, so that in the process, the temperature, pressure, water content, hydrate saturation, deformation, strength and mineral component distribution of the hydrate reservoir in the reinforcing and decomposing process can be obtained through sensor components (such as a displacement sensor, a TDR probe, a resistivity probe, a temperature sensor, a pressure sensor and the like), and the seepage field, temperature field, deformation field, hydrate and mineral content distribution evolution law of the hydrate reservoir can be obtained and observed in real time, so that the mechanical mechanism and yield change law in the hydrate reinforcing and mining process can be researched, potential geological disasters can be further prevented, and safe and efficient mining of hydrates can be realized; the reactor body units with different numbers can be selected according to test requirements to assemble the reactor body, so that the reactor bodies with different sizes can be formed, and the related reaction of the hydrate reservoir under the condition of different sizes of the reactor body can be met.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the embodiments or technical solutions of 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 structures shown in the drawings without creative efforts.
FIG. 1 is a sectional view of an embodiment of an assembled hydrate reservoir consolidation production simulation reactor of the present invention;
FIG. 2 is a sectional view of a kettle body unit in an embodiment of the assembled hydrate reservoir consolidation and exploitation simulation reaction kettle of the present invention;
FIG. 3 is a top view of a kettle body unit in an embodiment of the assembled hydrate reservoir consolidation production simulation reaction kettle of the present invention;
FIG. 4 is a top view of an upper end cover in an embodiment of the assembled hydrate reservoir consolidation production simulation reactor of the present invention;
FIG. 5 is a schematic structural diagram of an embodiment of the testing apparatus of the present invention.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front, rear, 8230; \8230;) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components in a specific posture (as shown in the figure), the motion situation, etc., and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides an assembled hydrate reservoir consolidation and exploitation simulation reaction kettle 100, and aims to provide an assembled reaction kettle 100 to meet the relevant reaction of a hydrate reservoir under the condition that the kettle body 10 has different sizes.
The following description will be made about the specific structure of the modular hydrate reservoir consolidation production simulation reactor 100 of the present invention:
referring to fig. 1 to 4 in combination, in an embodiment of the assembled hydrate reservoir consolidation production simulation reaction kettle 100 of the present invention, the assembled hydrate reservoir consolidation production simulation reaction kettle 100 includes a kettle body 10, an upper end cover 20, a lower end cover 30, a wellbore 40, and a sensor assembly;
the kettle body 10 comprises a plurality of kettle body units 11, the kettle body units 11 are sequentially stacked along the vertical direction to form a reaction cavity in a surrounding manner, and the reaction cavity is used for placing artificial seawater, methane or carbon dioxide gas, bacteria liquid and cementing liquid to form a hydrate reservoir in the reaction cavity; the upper end cover 20 covers the upper end of the uppermost kettle unit 11 in the kettle 10 and is provided with a first injection port 21 and a shaft external interface 22 which are arranged at intervals; the lower end cover 30 is covered on the lower end of the lowest kettle unit 11 in the kettle body 10 and is provided with a second filling opening; one end of the shaft 40 is inserted into the kettle body 10 through the shaft external interface 22, and the shaft 40 is provided with a production opening 41 communicated with the reaction cavity so as to provide a pressure reduction and production channel for the decomposition of a hydrate reservoir stratum in the reaction cavity; the sensor assembly is arranged on the kettle body 10 and used for acquiring the temperature, pressure, water content, hydrate saturation, deformation, strength and mineral component distribution of the hydrate reservoir in the reinforcing-decomposing process.
It can be understood that, in the using process of the assembled hydrate reservoir consolidation and exploitation simulation reaction kettle 100 of the present invention, artificial seawater, methane or carbon dioxide gas, bacterial liquid, and cementing liquid may be added into the reaction cavity of the kettle body 10 to form a hydrate reservoir in the reaction cavity, and the hydrate reservoir may be consolidated and decomposed, during which process, the temperature, pressure, water content, hydrate saturation, deformation, strength, and distribution of mineral components of the hydrate reservoir in the consolidation and decomposition process may be obtained through sensor components (e.g., displacement sensor 50, TDR probe 60, resistivity probe 70, temperature sensor 80, pressure sensor 90, etc.), so that the seepage field, temperature field, deformation field, hydrate, and mineral content distribution evolution law of the hydrate reservoir may be obtained and observed in real time, thereby the mechanics mechanism and yield variation law in the hydrate consolidation and exploitation process are studied, potential geological disasters are further prevented, and safe and efficient exploitation of hydrates are realized; wherein, different numbers of kettle body units 11 can be selected according to the test requirements to assemble the kettle body 10, so that kettle bodies 10 with different sizes can be formed, thereby satisfying the related reaction of hydrate reservoirs under the condition of different sizes of the kettle body 10.
In this embodiment, artificial seawater, methane or carbon dioxide gas, bacteria liquid, and cementing liquid may be added into the reaction cavity of the kettle 10 through the first injection port 21 or the second injection port.
Specifically, two adjacent kettle units 11 may be hermetically connected by using flange bolts 12, and the upper end cover 20 and the kettle unit 11 located at the uppermost position in the kettle 10 may also be hermetically connected by using flange bolts 12, and the lower end cover 30 and the kettle unit 11 located at the lowermost position in the kettle 10 may also be hermetically connected by using flange bolts 12.
Illustratively, the sensor assemblies may include a displacement sensor 50, a TDR probe 60 (time domain reflectometry probe), a resistivity probe 70, a temperature sensor 80, and a pressure sensor 90; the displacement sensor 50 is arranged on the kettle body 10, specifically can be positioned in the reaction cavity or outside the reaction cavity, and is used for monitoring the displacement change of the hydrate reservoir in the reaction cavity in real time; the TDR probe 60 is arranged on the kettle body 10, can be specifically positioned in the reaction cavity or outside the reaction cavity, and is used for monitoring the saturation distribution of a hydrate reservoir in the reaction cavity in real time; the resistivity probe 70 is arranged on the kettle body 10, specifically can be positioned in the reaction cavity or outside the reaction cavity, and is used for monitoring the mineral distribution of a hydrate reservoir in the reaction cavity in real time; the temperature sensor 80 is arranged on the kettle body 10, and can be specifically positioned in the reaction cavity or outside the reaction cavity, and is used for monitoring the temperature distribution in the reaction cavity in real time; the pressure sensor 90 is disposed on the kettle 10, and may be specifically located in the reaction chamber or outside the reaction chamber, for monitoring the pressure distribution in the reaction chamber in real time.
Specifically, the displacement sensor 50 measures the deformation of the top sediment by using the modified displacement sensor 50; the modified displacement sensor 50 is characterized in that a round non-compressible sheet is fixed at the tip of a Linear Variable Differential Transformer (LVDT) to prevent the LVDT tip from being placed in a hydrate reservoir stratum to influence the measurement accuracy.
Further, referring to fig. 1 in combination, in an embodiment of the assembled hydrate reservoir consolidation and production simulation reaction kettle 100 of the present invention, a first sealing ring 120 is disposed between the upper end cap 20 and the uppermost kettle unit 11 in the kettle 10; by such arrangement, the hydrate reservoir in the kettle body 10 can be prevented from leaking through the gap between the upper end cover 20 and the uppermost kettle body unit 11 in the kettle body 10 in the using process.
Similarly, in an embodiment, a second sealing ring 130 may also be disposed between the lower end cover 30 and the lowermost kettle unit 11 in the kettle 10; by the arrangement, the hydrate reservoir in the kettle body 10 can be prevented from leaking through the gap between the lower end cover 30 and the kettle body unit 11 positioned at the lowest position in the kettle body 10 in the use process.
Similarly, a third sealing ring 140 is disposed between two adjacent kettle units 11. By the arrangement, the hydrate reservoir in the kettle body 10 can be prevented from leaking through the gap between two adjacent kettle body units 11 in the using process.
Further, referring to fig. 1 in combination, in an embodiment of the assembled hydrate reservoir consolidation and production simulation reaction kettle 100 of the present invention, a first annular groove 11a is formed between the upper end cover 20 and the uppermost kettle unit 11 in the kettle 10, and a first sealing ring 120 is installed in the first annular groove 11 a; in this way, during the assembly process, the first sealing ring 120 is installed in the first annular groove 11a, so that the first sealing ring 120 is stably installed between the upper end cover 20 and the uppermost kettle unit 11 in the kettle 10.
Specifically, the first annular groove 11a may be formed only on one side of the upper end cover 20 facing the kettle body unit 11; alternatively, the first annular groove 11a may be formed only on one side of the kettle unit 11 facing the upper end cap 20; or, a first groove may be formed on one side of the upper end cover 20 facing the kettle body unit 11, and a second groove may be formed on one side of the kettle body unit 11 facing the upper end cover 20, so that the first groove and the second groove form a first annular groove 11a.
Similarly, a second annular groove 11b is formed between the lower end cover 30 and the lowermost kettle unit 11 in the kettle 10, and a second sealing ring 130 is installed in the second annular groove 11 b; in this way, during the assembly process, the second sealing ring 130 can be installed in the second annular groove 11b, so that the second sealing ring 130 is stably installed between the lower end cover 30 and the lowermost kettle unit 11 in the kettle 10.
Specifically, the second annular groove 11b may be formed only on one side of the lower end cover 30 facing the kettle body unit 11; alternatively, the second annular groove 11b may be formed only on one side of the kettle unit 11 facing the lower end cover 30; or, a third groove may be formed on a side of the lower end cover 30 facing the kettle body unit 11, and a fourth groove may be formed on a side of the kettle body unit 11 facing the lower end cover 30, so that the third groove and the fourth groove form a second annular groove 11b.
Similarly, a third annular groove 11c is formed between two adjacent kettle body units 11, and a third sealing ring 140 is installed in the third annular groove 11 c; in this way, during the assembly process, the third sealing ring 140 may be installed in the third annular groove 11c, so that the third sealing ring 140 is stably installed between two adjacent tank units 11.
Specifically, the third annular groove 11c may be formed only on one side of one of the kettle body units 11 facing the other kettle body unit 11; or, a fifth groove and a sixth groove may be respectively formed on two adjacent kettle body units 11, so that the fifth groove and the sixth groove form a third annular groove 11c.
Further, referring to fig. 1, in an embodiment of the assembled hydrate reservoir consolidation production simulation reactor 100 of the present invention, a sealing rubber ring 150 is disposed between the wellbore 40 and the wellbore external interface 22. By such arrangement, leakage of the hydrate reservoir in the kettle body 10 through the gap between the wellbore 40 and the external wellbore interface 22 can be avoided during use.
Further, referring to fig. 1 in combination, in an embodiment of the assembled hydrate reservoir consolidation production simulation reactor 100 of the present invention, the sensor assembly includes a plurality of TDR probes 60, the plurality of TDR probes 60 are axially spaced along the reactor body 10; because in the process of reinforcing and decomposing the hydrate reservoir, the saturation of the hydrate reservoir at different depths can be different, in order to reduce detection errors and improve accuracy, therefore, a plurality of TDR probes 60 are distributed in the kettle body 10 at intervals, so that the hydrate saturation of the hydrate reservoir at different positions can be obtained through the TDR probes 60, more accurate physical property parameter changes can be obtained through calculation, and the monitoring accuracy is improved.
Similarly, the sensor assembly comprises a plurality of resistivity probes 70, and the resistivity probes 70 are distributed at intervals along the axial direction of the kettle body 10; because in the process of reinforcing and decomposing the hydrate reservoir, the mineral distribution of the hydrate reservoir at different depths is different, in order to reduce detection errors and improve the accuracy, therefore, the mineral distribution of the hydrate reservoir at different positions can be obtained through the plurality of resistivity probes 70 by distributing the plurality of resistivity probes 70 in the kettle body 10 at intervals, and more accurate physical property parameter changes can be obtained through calculation so as to improve the monitoring accuracy.
Similarly, the sensor assembly comprises a plurality of pressure sensors 90 and a plurality of temperature sensors 80, the pressure sensors 90 and the temperature sensors 80 are arranged, and the plurality of pressure sensors 90 and the plurality of temperature sensors 80 are distributed at intervals along the axial direction of the kettle body 10; because in the process of reinforcing and decomposing the hydrate reservoir, parameters such as pressure, temperature and the like of the hydrate reservoir at different depths are different, in order to reduce detection errors and improve accuracy, the changes of the parameters such as pressure, temperature and the like of the hydrate reservoir at different positions can be respectively obtained through the plurality of pressure sensors 90 and the plurality of temperature sensors 80, and more accurate physical property parameter changes can be obtained through calculation so as to improve monitoring accuracy.
Further, referring to fig. 1 to 3 in combination, in an embodiment of the assembled hydrate reservoir consolidation production simulation reaction kettle 100 of the present invention, at least one TDR probe 60, at least one resistivity probe 70, at least one temperature sensor 80, and at least one pressure sensor 90 are correspondingly disposed in a space formed by each kettle body unit 11; like this, in can stacking the cauldron body 10 that forms in a plurality of cauldron body units 11, can be in the axial direction of cauldron body 10, relatively evenly distributed has a plurality of TDR probes 60, a plurality of resistivity probe 70, a plurality of temperature sensor 80 and a plurality of pressure sensor 90 to further promote the accuracy of monitoring.
Specifically, during the assembly process, the plurality of TDR probes 60, the plurality of resistivity probes 70, the plurality of temperature sensors 80, and the plurality of pressure sensors 90 may be respectively installed into the reaction chamber from the top or the bottom of the autoclave body 10, or may be installed into the reaction chamber from the installation channel on the sidewall of the autoclave body 10.
Further, referring to fig. 1 to 3 in combination, in an embodiment of the assembled hydrate reservoir consolidation and production simulation reaction kettle 100 of the present invention, a side wall of each kettle body unit 11 is provided with a first installation channel and a second installation channel which are arranged at intervals, the first installation channel accommodates at least one TDR probe 60, and the second installation channel accommodates at least one resistivity probe 70; so configured, at least one TDR probe 60 can be accommodated at the first mounting channel, and at least one resistivity probe 70 can be accommodated at the second mounting channel; for example, when the tank 10 has four tank units 11 stacked and five TDR probes 60 and five resistivity probes 70 are to be installed, two TDR probes 60 may be accommodated at one of the first installation channels and two resistivity probes 70 may be accommodated at one of the second installation channels.
Further, referring to fig. 1 to 3 in combination, in an embodiment of the assembled hydrate reservoir consolidation production simulation reactor 100 of the present invention, the TDR probe 60 includes a first transmitter 61 and a first receiver 62, in the same TDR probe 60, the first transmitter 61 and the first receiver 62 are located on the same horizontal plane, and a connection line between the first transmitter 61 and the first receiver 62 does not pass through the axis of the reactor body 10; therefore, the hydrate saturation of the hydrate reservoir at the corresponding position can be obtained and observed in real time under the action of the first emitter 61 and the first receiver 62, and the specific working principle is the prior art, which is not described in detail herein; in addition, since the shaft 40 is disposed at the axial center of the autoclave body 10 and the shaft 40 is disposed coaxially with the autoclave body 10, the shaft 40 can be prevented from affecting the normal operation of the TDR probe 60 by making the connection line between the first transmitter 61 and the first receiver 62 not pass through the axial center of the autoclave body 10, so that the first receiver 62 can receive the signal transmitted by the first transmitter 61.
Further, in the same TDR probe 60, a connection line between the first transmitter 61 and the axis of the kettle 10 is defined as a first connection line, and a connection line between the first receiver 62 and the axis of the kettle 10 is defined as a second connection line, so that an included angle between the first connection line and the second connection line is α, and then the following conditions are satisfied: 0 ° < α <170 °; because the shaft 40 has a certain size, the shaft 40 can be sufficiently prevented from influencing the normal operation of the TDR probe 60 by controlling the included angle between the first connecting line and the second connecting line to be 0-170 degrees, so that the first receiver 62 can receive the signal sent by the first transmitter 61.
Also, in order to secure the accuracy of detection, the distance between the first receiver 62 and the first transmitter 61 may be made larger than 2cm.
Similarly, the resistivity probe 70 comprises a second transmitter 71 and a second receiver 72, in the same resistivity probe 70, the first transmitter 61 and the first receiver 62 are located on the same horizontal plane, and the connection line between the second transmitter 71 and the second receiver 72 does not pass through the axis of the tank 10; in this way, the mineral distribution of the hydrate reservoir at the corresponding position can be obtained and observed in real time under the action of the second transmitter 71 and the second receiver 72, and the specific working principle is the prior art, which is not described in detail herein; in addition, because the shaft 40 is arranged at the axial center of the autoclave body 10, and the shaft 40 and the autoclave body 10 are coaxially arranged, the connection line between the second transmitter 71 and the second receiver 72 does not pass through the axial center of the autoclave body 10, so that the shaft 40 can be prevented from affecting the normal operation of the resistivity probe 70, and the second receiver 72 can receive the signal sent by the second transmitter 71.
Further, in the same resistivity probe 70, a connection line between the second transmitter 71 and the axis of the autoclave body 10 is defined as a third connection line, and a connection line between the second receiver 72 and the axis of the autoclave body 10 is defined as a fourth connection line, so that an included angle between the third connection line and the fourth connection line is α, then the conditions are satisfied: 0 ° < α <170 °; because the shaft 40 has a certain size, the angle between the third connecting line and the fourth connecting line is controlled between 0-170 degrees, so that the shaft 40 can be sufficiently prevented from influencing the normal operation of the resistivity probe 70, and the second receiver 72 can receive the signal sent by the second transmitter 71.
Also, in order to secure the accuracy of detection, the distance between the second receiver 72 and the second transmitter 71 may be made larger than 2cm.
Further, referring to fig. 1, in an embodiment of the assembly type simulation reactor 100 for hydrate reservoir consolidation and production according to the present invention, the assembly type simulation reactor 100 for hydrate reservoir consolidation and production further includes a constant temperature device 110, and the constant temperature device 110 uses absolute ethyl alcohol as a circulation medium to regulate and control the temperature inside the reactor body 10. So set up, in the experimentation, accessible constant temperature equipment 110 regulates and control the temperature in the cauldron body 10 for the temperature in the cauldron body 10 is transferred to and is studied the temperature that the sea area degree of depth corresponds, with the simulation actual environment, thereby further guarantees the accuracy of monitoring.
Further, referring to fig. 1, in an embodiment of the assembled hydrate reservoir consolidation and production simulation reactor 100 of the present invention, the constant temperature device 110 includes a housing 111, a temperature controller 112, a liquid inlet pipe and a liquid outlet pipe; a mounting cavity is formed in the shell 111, the reaction kettle 100 is arranged in the mounting cavity, a circulating refrigeration space is formed between the outer surface of the kettle body 10 and the wall of the mounting cavity and used for inputting absolute ethyl alcohol, and the shell 111 is also provided with a liquid inlet and a liquid outlet which are communicated with the circulating refrigeration space; the temperature controller 112 is arranged outside the shell 111 and is provided with a temperature control chamber; the outlet and the inlet of the liquid inlet pipe are respectively communicated with the liquid inlet and the temperature control chamber; the inlet and the outlet of the liquid outlet pipe are respectively communicated with the liquid outlet and the temperature control chamber.
So set up, at first through the temperature controller 112 control temperature of the indoor absolute ethyl alcohol of temperature control (absolute ethyl alcohol), after the temperature regulation of the indoor absolute ethyl alcohol of temperature control reached required temperature, just carry absolute ethyl alcohol to the circulation refrigeration space in through the feed liquor pipe, in order to carry out the temperature regulation and control to the cauldron body 10 through the absolute ethyl alcohol in the circulation refrigeration space, then the absolute ethyl alcohol in the circulation space will flow back to the temperature control room through the drain pipe, so, alright pass through the temperature control room, form the circulation runner between feed liquor pipe, circulation refrigeration space and the drain pipe, in order to carry out the temperature regulation and control to cauldron body 10, alright make the temperature in the cauldron body 10 adjust to the temperature that corresponds with research sea area degree of depth, in order to simulate actual environment.
And, casing 111 is explosion-proof cauldron, and because the pressure that the research sea area degree of depth of reality corresponds is higher, consequently in the test process, the pressure in the cauldron body 10 also needs set up higher pressure, so, through setting up the cauldron body 10 in the installation cavity of explosion-proof cauldron, alright protect experimenter's personal safety, prevent that the cauldron body 10 from exploding in the test process, and injure the experimenter.
Of course, in other embodiments, a refrigeration sheet may also be directly disposed in the kettle 10, so as to regulate and control the temperature inside the kettle 10 through the refrigeration sheet.
With reference to fig. 5, the present invention further provides a testing apparatus 1000, where the testing apparatus 1000 includes a cleaning robot and the assembled hydrate reservoir consolidation production simulation reaction kettle 100 as described above, and the specific structure of the assembled hydrate reservoir consolidation production simulation reaction kettle 100 is described in detail in the foregoing embodiments. Since the cleaning robot system adopts all the technical solutions of the foregoing embodiments, at least all the beneficial effects brought by all the technical solutions of the foregoing embodiments are achieved, and details are not repeated herein.
In this embodiment, the testing apparatus 1000 may further include an injection control system 200, a seawater supply system 300, an air supply system 400, a microorganism supply system 500, a cementing liquid supply system 600, and a hydrate mining system 700;
the injection control system 200 is communicated with the reaction cavity of the kettle body 10; an outlet of the seawater supply system 300 is communicated with the reaction cavity of the kettle body 10 through the injection control system 200 so as to add artificial seawater into the reaction cavity; the gas outlet of the gas supply system 400 is communicated with the reaction cavity of the kettle body 10 through the injection control system 200 so as to add methane or carbon dioxide gas into the reaction cavity; an outlet of the microorganism supplying system 500 is communicated with the reaction cavity of the kettle body 10 through the injection control system 200 so as to add bacteria liquid into the reaction cavity; an outlet of the cementing liquid supply system 600 is communicated with the reaction cavity of the kettle body 10 through the injection control system 200 so as to add cementing liquid into the reaction cavity; the hydrate producing system 700 is connected to the wellbore 40 and is used for reducing the pressure in the kettle body 10 to promote the decomposition of the hydrate in the kettle body 10.
Specifically, the kettle body 10 is used for filling test sand to provide a reaction environment; the seawater supply system 300 can be communicated with the kettle body 10 through the first injection port 21 of the upper end cover 20 by the first booster pump 210 and the first liquid flow meter 220 in the injection control system 200, so as to inject seawater into the kettle body 10; the gas supply system 400 can be communicated with the reaction chamber through the second injection port of the lower end cap 30 by the second booster pump 230, the gas path stabilization tank 240, the first gas flow meter 250 and the PID pressure controller 260 in the injection control system 200, so as to add methane or carbon dioxide gas into the reaction chamber; the microorganism supplying system 500 can be communicated with the kettle body 10 through the first injection port 21 of the upper end cover 20 by the third booster pump 270 and the second liquid flow meter 280 in the injection control system 200 to add the bacteria liquid into the kettle body 10; the cementing liquid supplying device can be communicated with the kettle body 10 through a fourth booster pump 290 and a third liquid flow meter 291 in the injection control system 200 via a second injection port of the lower end cover 30, so as to add cementing liquid into the kettle body 10; the hydrate mining system 700 may include a vacuum pump 710, a fume hood 720, a PID regulator 730, a gas-liquid separator 740, a measuring cylinder 750 and a second gas flowmeter 760, so that the pressure in the kettle 10 may be controlled by the vacuum pump 710, the fume hood 720 and the PID regulator 730 to form a low-pressure environment in the kettle 10, so as to perform depressurization mining on the hydrate reservoir in the kettle 10, the mined material may be collected in the gas-liquid separator 740 for gas-liquid separation, the separated gas flows to the second gas flowmeter 760 under the action of the fume hood 720, so as to calculate the gas flow rate by the second gas flowmeter 760, the liquid may flow into the measuring cylinder 750 below the gas-liquid separator 740, so as to read the liquid flow rate by the measuring cylinder 750 (also may be weighed by a balance to obtain the weight of the liquid, and the liquid flow rate may be obtained by conversion); and finally, calculating to obtain the ratio of each phase flow.
An extraction opening 41 can be formed in the wall of the shaft 40, so that the shaft 40 is communicated with the kettle body 10 through the extraction opening 41, and a screen is arranged at the extraction opening 41, so that fluid extracted from the kettle body 10 can flow out through the extraction opening 41, and sand, soil and other particles are isolated in the kettle body 10 through the screen.
In addition, data on each system such as the injection control system 200, the seawater supply system 300, the gas supply system 400, the microorganism supply system 500, the glue supply system 600, the pressure stabilizing system, the temperature control system, the shear wave speed measuring system and the like can be acquired through the data acquisition system and displayed in real time, so that the change of each data parameter can be conveniently observed in real time through experiment manual work.
In this embodiment, in the test process, the pressure in the kettle 10 can be regulated and controlled by the pressure sensor 90 in the pressure stabilizing system, so that the pressure in the kettle 10 is regulated to the preset pressure corresponding to the depth of the research sea area, so as to simulate the actual environment, thereby further ensuring the monitoring accuracy.
Similarly, in the test process, the temperature in the kettle body 10 can be regulated and controlled by the temperature sensor 80 in the temperature control system, so that the temperature in the kettle body 10 is regulated to the preset temperature corresponding to the depth of the research sea area, the actual environment is simulated, and the monitoring accuracy is further ensured.
Because the pressure in the kettle body 10 is higher in the test process, in order to facilitate the artificial seawater to be smoothly injected into the kettle body 10, the kettle body 10 can be provided with a vent valve, when the artificial seawater needs to be injected, the vent valve is firstly opened to ensure that the pressure in the kettle body 10 is consistent with the atmospheric pressure, and the artificial seawater can be smoothly injected into the kettle body 10; in addition, the arrangement of the emptying valve can also facilitate the pressure relief of the kettle body 10 after the experiment is finished.
The concrete preparation method of the bacterial liquid in the microbial supply system 500 comprises the following steps: vacuum drying and preserving Bacillus pasteurii Sporosarcina pasteurii in lyophilized powder stateAn Er\ 36387 bottle, firstly preparing a liquid culture medium, wherein the components of the liquid culture medium are 20g/L of yeast powder and NH 4 Cl 10g/L，MnSO 4 ·H 2 O10mg/L，NiCl·6H 2 O24 mg/L and adjusted to pH =9.0 with 1M NaOH. Sterilizing the liquid culture medium with high temperature steam at 121 deg.C for 30min, cooling in an aseptic operating table, heating the upper part of the A36387 bottle with an alcohol lamp, dropping a few drops of water to break, taking out the inner tube with forceps, and opening the tampon. Sucking 1mL of liquid culture medium by using a sterile pipette, injecting the liquid culture medium into the inner tube to dissolve the freeze-dried powder, pouring the dissolved Bacillus pasteurianus Sporosarcina pasturii into the culture tube of 6mL of liquid culture medium, and uniformly mixing to obtain a bacterial liquid.
The concrete configuration method of the cementing liquid in the cementing liquid supply system 600 comprises the following steps: adding CaCl 2 Dissolving urea in water to obtain 0.5M CaCl 2 And 0.75M urea mixed solution, and 3g/L beef extract is supplemented at the same time, so as to obtain the cementing solution.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, which are directly or indirectly applied to the present invention, are included in the scope of the present invention.
Claims (10)
1. The utility model provides an assembled hydrate reservoir consolidates exploitation simulation reation kettle which characterized in that includes:
the reaction chamber is used for placing artificial seawater, methane or carbon dioxide gas, bacteria liquid and cementing liquid so as to form a hydrate reservoir in the reaction chamber;
the upper end cover is covered at the upper end of the uppermost kettle body unit in the kettle body and is provided with first injection ports and shaft external interfaces which are arranged at intervals;
the lower end cover is arranged at the lower end of the lowest kettle body unit in the kettle body in a covering manner and is provided with a second injection port;
one end of the shaft is inserted into the kettle body through the shaft external interface, and the shaft is provided with a production opening communicated with the reaction cavity so as to provide a pressure reduction and production channel for the decomposition of a hydrate reservoir in the reaction cavity;
the sensor assembly is arranged in the reaction kettle and used for acquiring the temperature, pressure, water content, hydrate saturation, deformation, strength and distribution of mineral components of the hydrate reservoir in the reinforcement-decomposition process.
2. The assembled hydrate reservoir reinforcement and production simulation reaction kettle according to claim 1, wherein a first sealing ring is arranged between the upper end cover and the kettle body unit positioned at the uppermost position in the kettle body.
3. The assembled hydrate reservoir reinforcement production simulation reaction kettle according to claim 2, wherein a first annular groove is formed between the upper end cover and the kettle body unit positioned at the uppermost position in the kettle body, and the first sealing ring is installed in the first annular groove.
4. The assembled hydrate reservoir reinforcement production simulation reaction kettle according to claim 1, wherein a second sealing ring is arranged between the lower end cover and a kettle body unit positioned at the lowest position in the kettle body.
5. The assembled hydrate reservoir reinforcement production simulation reaction kettle according to claim 4, wherein a second annular groove is formed between the lower end cover and a lowest kettle body unit in the kettle body, and the second sealing ring is installed in the second annular groove.
6. The assembled hydrate reservoir consolidation production simulation reaction kettle according to claim 1, wherein a third sealing ring is arranged between two adjacent kettle body units.
7. The assembled hydrate reservoir reinforcement production simulation reaction kettle according to claim 6, wherein a third annular groove is formed between two adjacent kettle body units, and the third sealing ring is installed in the third annular groove.
8. The assembly type hydrate reservoir consolidation production simulation reaction kettle according to claim 1, wherein a sealing rubber ring is arranged between the shaft and the shaft external interface;
and/or the sensor assembly comprises a plurality of TDR probes which are distributed at intervals along the axial direction of the kettle body;
and/or the sensor assembly comprises a plurality of resistivity probes which are axially distributed at intervals along the kettle body;
and/or, the sensor subassembly includes pressure sensor and temperature sensor, pressure sensor with temperature sensor all is equipped with a plurality ofly, and is a plurality of pressure sensor and a plurality of temperature sensor all follows the axial interval distribution of the cauldron body.
9. The assembled hydrate reservoir reinforcement and exploitation simulation reaction kettle according to claim 1, further comprising a constant temperature device, wherein the constant temperature device uses absolute ethyl alcohol as a circulating medium, and is used for regulating and controlling the temperature in the reaction cavity.
10. A test apparatus comprising the modular hydrate reservoir consolidation production simulation reaction vessel of any one of claims 1 to 9.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117010602A (en) * | 2023-10-07 | 2023-11-07 | 广东海洋大学 | Method for processing data of drilling and production well bore of natural gas hydrate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117010602A (en) * | 2023-10-07 | 2023-11-07 | 广东海洋大学 | Method for processing data of drilling and production well bore of natural gas hydrate |
| CN117010602B (en) * | 2023-10-07 | 2023-12-19 | 广东海洋大学 | Method for processing data of drilling and production well bore of natural gas hydrate |
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