CN111999466B - Detachable sand-discharging and sand-preventing reaction kettle for natural gas hydrate exploitation - Google Patents
Detachable sand-discharging and sand-preventing reaction kettle for natural gas hydrate exploitation Download PDFInfo
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- CN111999466B CN111999466B CN202010789792.0A CN202010789792A CN111999466B CN 111999466 B CN111999466 B CN 111999466B CN 202010789792 A CN202010789792 A CN 202010789792A CN 111999466 B CN111999466 B CN 111999466B
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 500
- 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 36
- 238000007599 discharging Methods 0.000 title claims abstract description 29
- 238000000926 separation method Methods 0.000 claims abstract description 83
- 238000007789 sealing Methods 0.000 claims abstract description 52
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 239000004576 sand Substances 0.000 claims description 420
- 238000004519 manufacturing process Methods 0.000 claims description 164
- 238000012360 testing method Methods 0.000 claims description 112
- 230000002265 prevention Effects 0.000 claims description 89
- 238000005192 partition Methods 0.000 claims description 37
- 238000002347 injection Methods 0.000 claims description 21
- 239000007924 injection Substances 0.000 claims description 21
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 13
- 239000007789 gas Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000000945 filler Substances 0.000 claims description 9
- 238000005065 mining Methods 0.000 claims description 7
- 238000004088 simulation Methods 0.000 claims description 7
- 150000004677 hydrates Chemical class 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 2
- 238000003860 storage Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 9
- 238000000354 decomposition reaction Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000009977 dual effect Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 natural gas hydrates Chemical class 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
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Abstract
The invention discloses a detachable sand-discharging and sand-preventing reaction kettle for natural gas hydrate exploitation, which comprises a reaction kettle, wherein the reaction kettle comprises a first reaction kettle component, a second reaction kettle component, a third reaction kettle component, a ball valve, a separation net and a sealing cover, the first reaction kettle component is a cylindrical shell with an opening at one end and a closed end, the second reaction kettle component and the third reaction kettle component are cylindrical shells with openings at two ends, preformed holes for mounting sensors are formed in the cylindrical shells of the first reaction kettle component, the second reaction kettle component and the third reaction kettle component, and a pressure relief port and a liquid discharge port are formed in each of the first reaction kettle component, the second reaction kettle component and the third reaction kettle component.
Description
Technical Field
The invention relates to a sand production and prevention process test for natural gas hydrate exploitation, in particular to a detachable sand production and prevention reaction kettle for natural gas hydrate exploitation.
Background
With the gradual depletion of traditional energy sources, the natural gas hydrate has the characteristics of large reserve, large energy density and wide distribution, and becomes a substitute energy source with great potential. The current worldwide research and development on natural gas hydrates has progressed into the actual exploitation stage. The sand blockage which is a very serious problem is encountered in the actual exploitation stage, and the sand blockage becomes a key problem which restricts the long-term sustainable exploitation of the natural gas hydrate at present. Therefore, the research on the problems of sand production and prevention of the natural gas hydrate in the exploitation process is very important.
The simulation device in the prior art is not flexible enough, and can only simulate the hydrate sand production and prevention test under a few conditions.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the detachable sand-producing and preventing reaction kettle for natural gas hydrate exploitation, the reaction kettle has the characteristic of flexible assembly design, and each reaction kettle component in the reaction kettle can complete the sand-producing and preventing experimental research of different experimental purposes through different combinations.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a detachable sand-discharging and sand-preventing reaction kettle for natural gas hydrate exploitation comprises a first reaction kettle component, a second reaction kettle component, a third reaction kettle component, a ball valve, a separation net and a sealing cover, the first reaction kettle component is a cylindrical shell with an opening at one end and a closed end, the second reaction kettle component and the third reaction kettle component are cylindrical shells with openings at two ends, the cylindrical shells of the first reaction kettle component, the second reaction kettle component and the third reaction kettle component are all provided with reserved holes for mounting sensors, the first reaction kettle assembly, the second reaction kettle assembly and the third reaction kettle assembly are also provided with a pressure relief port and a liquid discharge port, the first reaction kettle assembly and the third reaction kettle assembly are provided with a sand injection port, a water injection port, a gas injection methane port, an exploitation port and an observation port, and the sealing cover is provided with an exploitation port;
different combinations of the first reaction kettle assembly, the second reaction kettle assembly, the third reaction kettle assembly, the ball valve, the partition net and the sealing cover can realize simulation of sand production and prevention tests of single and double observation areas, single and double well exploitation and sand control screen pipes in different directions of natural gas hydrate reservoir storage.
As above-mentioned but a split sand control reation kettle that goes out for natural gas hydrate exploitation, furtherly, first reation kettle subassembly with third reation kettle subassembly still includes portable piston, the one end of first reation kettle subassembly is equipped with annotates the nitrogen gas port, notes nitrogen gas port has been seted up on the cylinder casing of third reation kettle subassembly, it is used for injecting into gaseous drive to annotate the nitrogen gas port portable piston orientation the motion of packing direction in the reation kettle, wherein, first reation kettle subassembly is equipped with a portable piston, and this portable piston during operation moves towards first reation kettle subassembly open end, third reation kettle subassembly is equipped with two portable pistons, and this portable piston during operation moves towards third reation kettle subassembly both ends.
The detachable sand-discharging and sand-preventing reaction kettle for natural gas hydrate exploitation is characterized in that when the reaction kettle is used for a single-well sand-discharging and sand-preventing test without an observation area, the reaction kettle is formed by sequentially assembling a first reaction kettle assembly, a ball valve, a separation net, a second reaction kettle assembly, the separation net and a sealing cover, wherein the first reaction kettle assembly is used for simulating a hydrate area, the ball valve, the separation net, the second reaction kettle assembly and the separation net are used for simulating a sand-preventing screen area, and the sealing cover is used for simulating an exploitation sand-discharging and collecting port; specifically, when the reaction kettle is vertically arranged and the sealing cover is positioned at the bottom end, a sieve tube sand production and prevention test of the sand control sieve tube below the hydrate reservoir is simulated; when the reaction kettle is horizontally arranged, a sand production and prevention test of the sand control screen pipe on the right side of the hydrate reservoir is simulated; when the reaction kettle is vertically arranged and the sealing cover is positioned at the top end, a sand-preventing and sand-preventing test of the sand-preventing screen pipe above the hydrate reservoir is simulated.
The detachable sand-discharging and sand-preventing reaction kettle for natural gas hydrate exploitation is characterized in that when the reaction kettle is used for a double-well sand-discharging and sand-preventing test without an observation area, the reaction kettle is formed by sequentially assembling a sealing cover, a partition net, a second reaction kettle component, the partition net, a ball valve, a third reaction kettle component, the ball valve, the partition net, the second reaction kettle component, the partition net and the sealing cover, wherein the third reaction kettle component is used for simulating a hydrate area, the ball valve, the partition net, the second reaction kettle component and the partition net are used for simulating a sand-preventing screen area, and the sealing cover is used for simulating an exploitation sand-discharging and collecting port; specifically, when the reaction kettle is vertically arranged, a sieve tube sand production and prevention test of a sand prevention sieve tube above and below a hydrate reservoir is simulated; when the reaction kettle is horizontally arranged, a sand-preventing test of sand-preventing sieve tubes on the left side and the right side of the hydrate reservoir is simulated.
The detachable sand-discharging and sand-preventing reaction kettle for natural gas hydrate exploitation is characterized in that when the reaction kettle is used for a single-well sand-discharging and sand-preventing test of a single observation area, the reaction kettle is formed by sequentially assembling a first reaction kettle component, a ball valve, a separation net, a second reaction kettle component, the separation net and the first reaction kettle component, the first reaction kettle component close to the ball valve is used for simulating a hydrate area, the ball valve, the separation net, the second reaction kettle component and the separation net are used for simulating a sand-preventing screen area, and the first reaction kettle component far away from the ball valve is used for simulating a sand-discharging observation area and a sand-discharging and collecting port; specifically, when the reaction kettles are vertically arranged and the ball valve is close to the top end, a sieve tube sand production and prevention test of a sand prevention sieve tube below a hydrate reservoir is simulated, and at the moment, a first reaction kettle assembly far away from the ball valve is equivalent to a combination of a third reaction kettle assembly and a sealing cover; when the reaction kettle is vertically arranged and the ball valve is close to the bottom end, a sieve tube sand production and prevention test of the sand prevention sieve tube above the hydrate reservoir is simulated; when the reaction kettle is horizontally arranged, a sand-preventing test of sand production of the sieve tube of the sand-preventing sieve tube on the right side of the hydrate reservoir is simulated.
The detachable sand-discharging and sand-preventing reaction kettle for natural gas hydrate exploitation is characterized in that when the reaction kettle is used for a double-well sand-discharging and sand-preventing test of a single observation area, the reaction kettle consists of a first reaction kettle component, a ball valve, a separation net, a second reaction kettle component, a separation net, a third reaction kettle component, a separation net, a second reaction kettle component, a separation net, a ball valve and a sealing cover; in particular, the amount of the solvent to be used,
when the reaction kettles are horizontally arranged, a sand-preventing and sand-preventing test of the sand-preventing sieve tube on the right side of the hydrate reservoir is simulated, the connection and assembly relationship is formed by sequentially assembling a first reaction kettle assembly, a ball valve, a separation net, a second reaction kettle assembly, the separation net, a third reaction kettle assembly, the separation net, a second reaction kettle assembly, the separation net, the ball valve and a seal cover, the first reaction kettle assembly is used for simulating a hydrate area, the ball valve, the separation net, the second reaction kettle assembly and the separation net are used for simulating a sand-preventing sieve tube area, the third reaction kettle assembly is used for simulating a sand observation area and a sand-producing collecting opening, the separation net, the second reaction kettle assembly, the separation net and the ball valve are used for simulating a sand-preventing sieve tube area, and the seal cover is used for simulating a sand-producing collecting;
when the reaction kettles are vertically arranged and the connection assembly relation is consistent with the horizontal arrangement of the reaction kettles, a sieve tube sand production and prevention test of a sand prevention sieve tube below a hydrate reservoir is simulated, the first reaction kettle component is used for simulating a hydrate region, the ball valve, the partition net, the second reaction kettle component and the partition net are used for simulating a sand prevention sieve tube region, the third reaction kettle component is used for simulating a sand production observation region and a sand production collection port, the partition net, the second reaction kettle component, the partition net and the ball valve are used for simulating a sand prevention sieve tube region, and the sealing cover is used for simulating a sand production collection port;
the reation kettle arranges perpendicularly and connects the equipment relation and be first reation kettle subassembly, separate the net, the second reation kettle subassembly, separate the net, the ball valve, the third reation kettle subassembly, the ball valve, separate the net, the second reation kettle subassembly, separate the net, when the closing cap is assembled in proper order, what simulate is that the sand control screen pipe is in hydrate and hides the screen pipe sand control test of top and below, first reation kettle subassembly is used for simulating sand observation district and is mined out sand and collect the mouth, separate the net, the second reation kettle subassembly, separate the net, the ball valve is used for simulating sand control screen pipe area, the third reation kettle subassembly is used for simulating hydrate district.
The detachable sand-discharging and sand-preventing reaction kettle for natural gas hydrate exploitation is characterized in that when the reaction kettle is used for a single-well sand-discharging and sand-preventing test of a double observation area, the reaction kettle is formed by sequentially assembling a first reaction kettle component, a separation net, a second reaction kettle component, the separation net, a ball valve, a third reaction kettle component, the ball valve, the separation net, a second reaction kettle component, the separation net and a seal cover, wherein the first reaction kettle is used for simulating a hydrate area, the separation net, the second reaction kettle component, the separation net and the ball valve are used for simulating a sand-preventing screen area, the third reaction kettle component is used for simulating a sand-discharging observation area and a sand-discharging and collecting port, and particularly, when the reaction kettle is horizontally arranged, sand-discharging tests of screen pipes hidden at the left side and the right side of the sand-preventing screen pipe are simulated; when the reaction kettle is vertically arranged, a hydrate sand production and prevention test with sand concealed above and below the sand control screen pipe is simulated.
The detachable sand-discharging and sand-preventing reaction kettle for natural gas hydrate exploitation further comprises a first reaction kettle component, a separation net, a second reaction kettle component, a separation net, a ball valve, a third reaction kettle component, a ball valve, a separation net, a second reaction kettle component, a separation net and a sealing cover when the reaction kettle is used for a double-well sand-discharging and sand-preventing test of a double observation area, and specifically,
the reaction kettles are horizontally or vertically arranged, and when the connection and assembly relationship is that a first reaction kettle component, a separation net, a second reaction kettle component, the separation net, a ball valve, a third reaction kettle component, the ball valve, the separation net, the second reaction kettle component, the separation net and a seal cover are sequentially assembled, a sand production and sand prevention test of the sand control screen pipe above and below the hydrate reservoir is respectively and correspondingly simulated, the third reaction kettle component is used for simulating a hydrate area, the separation net, the second reaction kettle component, the separation net and the ball valve are used for simulating a sand control screen pipe area, the first reaction kettle component is used for simulating a sand production observation area, and the seal cover is used for simulating a sand production collection port;
when reation kettle horizontal arrangement and connection assembly relation were first reation kettle subassembly, ball valve, separate net, second reation kettle subassembly, separate net, third reation kettle subassembly, separate net, second reation kettle subassembly, separate net, ball valve and closing cap and assemble in proper order, the sand control screen pipe syntropy that goes out the sand of the screen pipe that simulates sand control screen pipe on the right side that hydrate was hidden goes out the sand control test, from reation kettle's left side to right side: the first reaction kettle component is used for simulating a hydrate area, the ball valve, the separation net, the second reaction kettle component and the separation net are used for simulating a sand control screen area, the third reaction kettle component is used for simulating a sand observation area and a mined sand collection port, and the first reaction kettle component is used for simulating a sand observation area and a mined sand collection port;
when reation kettle arranged perpendicularly and connect the equipment relation for first reation kettle subassembly, ball valve, separate net, second reation kettle subassembly, separate net, third reation kettle subassembly, separate net, second reation kettle subassembly, separate net, ball valve and closing cap and assemble in proper order, the sand control screen pipe of producing sand is experimental in the screen pipe syntropy of the top that hydrate was hidden, from reation kettle's below to top: the first reaction kettle component is used for simulating a hydrate area, the ball valve, the separation net, the second reaction kettle component and the separation net are used for simulating a sand control screen area, the third reaction kettle component is used for simulating a sand observation area and a mined sand collection port, and the first reaction kettle component is used for simulating a sand observation area and a mined sand collection port;
when reation kettle vertical arrangement and connection assembly relation were first reation kettle subassembly, ball valve, separate net, second reation kettle subassembly, separate net, third reation kettle subassembly, separate net, second reation kettle subassembly, separate net, ball valve and closing cap when assembling in proper order, the sand control screen pipe of producing sand is tested in the screen pipe syntropy of the below that hydrate was hidden, from reation kettle's top to below: the first reaction kettle component is used for simulating a hydrate area, the ball valve, the separation net, the second reaction kettle component and the separation net are used for simulating a sand control screen area, the third reaction kettle component is used for simulating a sand observation area and a mined sand collection port, and the first reaction kettle component is used for simulating a sand observation area and a mined sand collection port;
the reaction kettle is horizontally arranged or vertically arranged, and when the connection assembly relationship is that the first reaction kettle component, the ball valve, the separation net, the second reaction kettle component, the separation net, the third reaction kettle component, the separation net, the second reaction kettle component, the separation net, the ball valve and the sealing cover are sequentially assembled, the sand production sand control test that hydrate is hidden above and below the sand control screen pipe and is reversely close to the sand production is correspondingly simulated respectively, and the test is carried out from the two ends to the center of the reaction kettle: the first reaction kettle assembly is used for simulating a hydrate area, the ball valve, the separation net, the second reaction kettle assembly and the separation net are used for simulating a sand control screen area, and the third reaction kettle assembly is used for simulating a sand observation area and a sand mining collection port.
The detachable sand-discharging and sand-preventing reaction kettle for natural gas hydrate exploitation is characterized in that the sealing cover comprises a hemispherical cover and a flat sealing cover, the hemispherical cover is used for the vertical arrangement of the reaction kettle, the flat sealing cover is used for the horizontal arrangement of the reaction kettle, and the assembly of the third reaction kettle component and the sealing cover is equivalent to the assembly of the first reaction kettle component.
The reaction kettles in the reaction kettle can be combined into different reaction kettles according to different experimental conditions and purposes; the reaction kettles without sieve tubes are combined by adding covers on left and right reaction kettles (first reaction kettle components) to realize the generation and decomposition of hydrates; a series of sand production and prevention tests such as single well and double well without observation area, single well and double well of single observation area and single well and double well of double observation area can be carried out by combining the left reaction kettle, the right reaction kettle, the reaction kettle accessory, the left reaction kettle, the right reaction kettle (second reaction kettle component) and the central reaction kettle (third reaction kettle component); the left and right reaction kettles (which can be used as a left reaction kettle section or a right reaction kettle section) and the central reaction kettle can be used as a hydrate generation decomposition area and an observation area, and the second left and right reaction kettles and filter screens at two ends can be used as sand control screen areas;
the single-well sand production and prevention test without an observation area has three combination modes, wherein in the first combination mode, a reaction kettle is vertically arranged, a sieve tube sand production and prevention test of a sand control sieve tube below a hydrate reservoir is simulated, and a hydrate area (a left reaction kettle section), a sand control sieve tube area (a second left reaction kettle section) and a mined sand production collecting port (a hemispherical seal cover) are sequentially arranged from top to bottom; in the second combination mode, reaction kettles are horizontally arranged, a sieve tube sand production and prevention test of a sand prevention sieve tube on the right side of a hydrate reservoir is simulated, and a hydrate area (a left reaction kettle section), a sand prevention sieve tube area (a second left reaction kettle and a second right reaction kettle) and a produced sand collection port (a flat sealing cover) are sequentially arranged from left to right; in the third combination mode, reaction kettles are vertically arranged, a sieve tube sand production and prevention test of a sand prevention sieve tube above a hydrate reservoir is simulated, and a hydrate area (a left reaction kettle section), a sand prevention sieve tube area (a second left reaction kettle and a second right reaction kettle) and a mined sand production collection port (a flat sealing cover) are sequentially arranged from bottom to top;
two combination modes of a double-well sand production and prevention test without an observation area are adopted, wherein in the first combination mode, a reaction kettle is vertically arranged, a sieve tube sand production and prevention test of a sand control sieve tube above and below a hydrate reservoir is simulated, and a sand production collecting port (a flat sealing cover), a sand control sieve tube area (a second left and right reaction kettle), a hydrate area (a central reaction kettle section), a sand control sieve tube area (a second left and right reaction kettle) and a sand production collecting port (a hemispherical sealing cover) are sequentially arranged from top to bottom; in the second combination mode, reaction kettles are horizontally arranged, a sand-producing and sand-preventing test of the sand-preventing sieve tube on the left side and the right side of the hydrate reservoir is simulated, and an exploitation sand-producing collecting port (flat sealing cover), a sand-preventing sieve tube area (second left and right reaction kettles), a hydrate area (central reaction kettle section), a sand-preventing sieve tube area (second left and right reaction kettles) and an exploitation sand-producing collecting port (flat sealing cover) are sequentially arranged from left to right; the piston in the hydrate area is determined to be placed according to requirements, when the hydrate filler is required to be compacted, the piston can be placed to compact the hydrate filler, or the piston is not placed, the hydrate filler is compacted in advance and is placed from openings at two sides of the central reaction kettle;
four combination modes of a single-well sand production and prevention test of a single observation area are adopted, wherein in the first combination mode, a reaction kettle is vertically arranged, a sieve tube sand production and prevention test of a sand control sieve tube below a hydrate reservoir is simulated, and a hydrate area (a left reaction kettle section), a sand control sieve tube area (a second left reaction kettle, a second right reaction kettle), a sand production observation area (a left reaction kettle section) and a production sand production collecting port (a left reaction kettle section production port) are sequentially arranged from top to bottom; in the second combination mode, reaction kettles are vertically arranged, a sieve tube sand production and prevention test of a sand prevention sieve tube above a hydrate reservoir is simulated, and a hydrate area (a left reaction kettle section), a sand prevention sieve tube area (a second left reaction kettle and a second right reaction kettle), a sand production observation area (a left reaction kettle section) and a produced sand collection port (a left reaction kettle section exploitation port) are sequentially arranged from bottom to top; in the third combination mode, reaction kettles are horizontally arranged, a sieve tube sand production and sand control test of a sand control sieve tube on the right side of a hydrate reservoir is simulated, and a hydrate area (a left reaction kettle section), a sand control sieve tube area (a second left reaction kettle and a second right reaction kettle), a sand production observation area (a left reaction kettle section) and a production sand collection port (a left reaction kettle section production port) are sequentially arranged from left to right; in the fourth combination mode, reaction kettles are vertically arranged, a sieve tube sand production and prevention test of a sand prevention sieve tube below a hydrate reservoir is simulated, and a hydrate area (a left reaction kettle section), a sand prevention sieve tube area (a second left reaction kettle, a second right reaction kettle), a sand production observation area (a central reaction kettle section) and a mined sand production collecting port (a hemispherical seal cover) are sequentially arranged from top to bottom;
three combination modes of a double-well sand production and prevention test of a single observation area are adopted, wherein in the first combination mode, a reaction kettle is horizontally arranged, a sieve tube sand production and prevention test of a sand control sieve tube on the right side of a hydrate reservoir is simulated, and a hydrate area (a left reaction kettle section), a sand control sieve tube area (a second left reaction kettle, a second right reaction kettle), a sand production observation area (a central reaction kettle section and a produced sand collection port), a sand control sieve tube area (a second left reaction kettle, a second right reaction kettle) and a produced sand collection port (a flat sealing cover) are sequentially arranged from left to right; in the second combination mode, reaction kettles are vertically arranged, a sieve tube sand production and sand control test of a sand control sieve tube above and below a hydrate reservoir is simulated, and a sand production collecting port (a left reaction kettle section exploiting port), a sand production observation area (a left reaction kettle section), a sand control sieve tube area (a second left and right reaction kettle), a hydrate area (a central reaction kettle section), a sand control sieve tube area (a second left and right reaction kettle) and a sand production collecting port (a hemispherical sealing cover) are sequentially arranged from top to bottom; in the third combination mode, reaction kettles are vertically arranged, a sieve tube sand production and prevention test of a sand prevention sieve tube below a hydrate reservoir is simulated, and a hydrate area (a left reaction kettle section), a sand prevention sieve tube area (a second left and right reaction kettle), a sand production observation area (a central reaction kettle section), a sand prevention sieve tube area (a second left and right reaction kettle) and a mined sand production collecting port (a hemispherical sealing cover) are sequentially arranged from top to bottom; the first and the third of the three combination modes are provided with two sand control screen areas and two produced sand collecting openings, because the simulated sand flows through the two sand control screen areas respectively in the hydrate production process;
two combination modes of single-well sand production and prevention tests of double observation areas are adopted, wherein in the first combination mode, reaction kettles are horizontally arranged, simulated sieve tube sand production and prevention tests with hydrates hidden at the left and right sides of a sand control sieve tube are performed, and from left to right, a hydrate area (left reaction kettle section), a sand control sieve tube area (secondary left and right reaction kettles), a mined sand collection port (left mining port of a central reaction kettle section), a sand production observation area (central reaction kettle section), a mined sand collection port (right mining port of the central reaction kettle section), a sand control sieve tube area (secondary left and right reaction kettles) and a hydrate area (left reaction kettle section) are sequentially arranged; in the second combination mode, reaction kettles are vertically arranged, hydrate is stored above and below a sand control screen pipe to simulate a sand control test, and hydrate areas (left reaction kettle sections), sand control screen pipe areas (second left and right reaction kettles), a sand production collection port (left production port of a central reaction kettle section), a sand production observation area (central reaction kettle section), a sand production collection port (right production port of the central reaction kettle section), the sand control screen pipe areas (second left and right reaction kettles) and the hydrate areas (left reaction kettle sections) are arranged from top to bottom in sequence; the two combination modes well simulate the conditions of hydrate vertical well sand production and horizontal well sand production in the actual hydrate exploitation process;
the two modes are respectively reaction kettle horizontal arrangement and vertical arrangement, and are reversely far away from sand production, the simulation is that sand control screen pipes are used for sand control tests of screen pipe sand production from left to right and from top to bottom of hydrate reservoir, the two modes are respectively a hydrate area (central reaction kettle section), a sand control screen pipe area (secondary left to right reaction kettle), a sand production observation area (left to right reaction kettle section) and a sand production collection port (left to right reaction kettle section) from the central reaction kettle to two ends of the reaction kettle in sequence, and whether a piston of the central reaction kettle exists or not can be selected according to whether hydrate fillers are compacted or not; thirdly, fourthly, fifthly, respectively, horizontally arranging reaction kettles, vertically arranging reaction kettles and vertically arranging reaction kettles, and producing sand in the same direction, wherein a sand-producing sand-preventing test of a sand-preventing sieve tube on the right side, above and below the hydrate reservoir is simulated in sequence, and the three modes respectively comprise a hydrate area (a left reaction kettle section), a sand-preventing sieve tube area (a second left and right reaction kettle), a sand-producing observation area (a central reaction kettle section), a sand-producing collecting port (a central reaction kettle section exploitation port), a sand-preventing sieve tube area (a second left and right reaction kettle), a sand-producing observation area (a left reaction kettle section) and a sand-producing collecting port (a left reaction kettle section exploitation port) from the left end, the lower end and the upper end of the reaction kettle to the other section; last two kinds of modes are reation kettle horizontal arrangement and vertical arrangement respectively, and the sand is gone out to reverse being close to, and what the simulation was hydrate is hidden the sand control screen pipe sand control test of going out of the screen pipe of sand control screen pipe right and left side and upper and lower side, and these two kinds of modes are all hydrate district (left reation kettle section) from reation kettle both ends to central reation kettle in proper order, sand control screen pipe district (left reation kettle section about inferior), go out sand observation district (central reation kettle section), exploit sand collection mouth (exploitation mouth about the central reation kettle section).
Compared with the prior art, the invention has the beneficial effects that: each component of the reaction kettle can be combined in a multipurpose manner according to the experimental purpose, and specifically, the reaction kettle comprises a left half reaction kettle, a right half reaction kettle, a left reaction kettle section, a right reaction kettle section, a central reaction kettle section and accessories, wherein the reaction kettle sections of the three parts are connected and fixed through flanges, and the left half reaction kettle, the right half reaction kettle and the central reaction kettle section can simultaneously realize the observation and sand production metering functions of natural gas hydrate simulated exploitation sand production, the sand filling function of filling different porous media, the sand production water gas simulated exploitation function and the initial water gas injection function of generating the natural gas hydrate; the second left reaction kettle and the second right reaction kettle can respectively realize different functions of observation, sand filling, simulated exploitation, steam injection and the like according to requirements; in addition, a flat kettle cover and a hemispherical kettle cover are also arranged, so that the test scheme is more flexible and practical.
Drawings
FIG. 1 is a schematic structural diagram of a reaction vessel of the present invention, wherein FIG. 1(a) is a left reaction vessel and a right reaction vessel, FIG. 1(b) is a second left reaction vessel and a right reaction vessel, FIG. 1(c) is a central reaction vessel, and FIG. 1(d) is a fitting of the reaction vessel;
FIG. 2 is a simple combination and component replacement of reaction kettles, wherein FIG. 2(a) is the simplest combination of reaction kettles, and FIG. 2(b) is the component replacement of reaction kettles;
FIG. 3 is a schematic diagram of three combinations of a single-well sand production and prevention test without an observation area;
FIG. 4 is a schematic diagram of two combinations of a dual well sand control test without observation zones;
FIG. 5 is a schematic diagram of four combinations of single well sand production and control tests for a single observation area;
FIG. 6 is a schematic diagram of three combinations of a single observation zone dual well sand control test;
FIG. 7 is a schematic diagram of two combinations of a single well sand production and control test for dual observation zones;
FIG. 8 is a schematic diagram of seven combinations of a dual well sand production and control test for dual observation zones.
In the drawings: 1. the left and right reaction kettle walls; 2. a nitrogen injection port; 3. a movable piston; 4. a pressure relief port; 5. a secondary production port; 6. a temperature and pressure sensor preformed hole; 7. a liquid discharge port; 8. a transparent window under the observation port; 9. an extraction opening; 10. a support nut; 11. a flange; 12. a sand injection port; 13. a transparent window is arranged on the observation port; 14. a water injection port; 15. a methane gas injection port; 16. reserving a hole for the device; 17. the second left and right reaction kettle walls; 18. a central reaction vessel wall; 19. a ball valve; 20. the wall of the sand control screen pipe or the wall of the well is provided with a rigid separation net; 21. flat sealing; 22. a hemispherical cover.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Example (b):
in this embodiment, to explain the combination characteristics of the reaction kettle of the present invention more clearly, the first reaction kettle component, the second reaction kettle component, and the third reaction kettle component may be respectively referred to as a left reaction kettle, a right reaction kettle, a second reaction kettle, a left reaction kettle, a right reaction kettle, and a central reaction kettle, and the reaction kettle may be referred to as a reaction kettle for short.
Referring to fig. 1, three reactor sections, namely a left reactor wall 1, a right reactor wall 17 and a central reactor wall 18, of a reaction kettle are cylindrical pipe sections, and support nuts 10, device preformed holes 16 and temperature and pressure sensor preformed holes 6 are arranged on two sides of the three pipe walls so as to realize the support function of the reaction kettle structure and the control and collection of device and parameter information; all parts of the three kettle sections are connected by flanges 11, the bottom of the three kettle sections is provided with a pressure relief port 4, and a liquid discharge port 7 is used for realizing pressure reduction in a compression space, solid-liquid discharge in the kettle and cleaning of the kettle sections; the left and right reaction kettle wall 1 kettle sections are open at one end and closed at the other end, and the two kettle sections of the secondary left and right reaction kettle walls 17 and the central reaction kettle wall 18 are both open at two ends and have mirror symmetry structures respectively; the movable pistons 3 in the left and right reaction kettles and the central reaction kettle can be detached, and the movable pistons 3 are used for filling nitrogen into the compaction kettle by matching with the nitrogen injection ports 2. The upper parts of the left and right reaction kettle walls 1 and the central reaction kettle wall 18 are respectively provided with a sand injection port 12, a water injection port 14 and a methane injection port 15 so as to realize the injection of sand water vapor into the kettle sections; the upper parts and the bottoms of the left and right reaction kettle walls 1 and the central reaction kettle wall 18 are respectively provided with an upper observation port transparent window 13 and a lower observation port transparent window 8 so as to realize the function of checking the sand production condition or the change in the kettle section in real time in the mining process and the experimental process, the left and right reaction kettle walls 1 and the central reaction kettle wall 18 are respectively provided with a mining port 9, and the left and right reaction kettle walls 1 are also provided with auxiliary mining ports; the ball valve 19 and the sand control screen wall or well wall rigid spacer 20 are placed between the kettle sections serving as the hydrate area and the screen packing area to simulate the separation between the actual hydrate reservoir and the well wall or screen; the flat sealing cover 21 and the hemispherical cover 22 can effectively seal the reaction kettle in a sand production and prevention experiment with simple design, and both have an exploitation port at the bottom to realize the sand production function in the exploitation process; the hemispherical cover 22 can be used in the experiment of designing a vertical reaction device, and the sand can be fully collected by utilizing the hemisphere.
The function of each combination method and the description of the simulated sand control test are described in detail below.
Referring to fig. 2(a), the combination shown is the simplest combination of the reaction kettle, which is composed of a left reaction kettle with left and right reaction kettle walls 1, a sand control screen wall or well wall rigid partition net 20 and a hemispherical cover 22 or a flat cover 21. Referring to fig. 2(b), a flat cover 21 is typically used in a horizontal arrangement and a hemispherical cover 22 is used in a vertical arrangement, since this allows for adequate collection of the produced sand; the left reaction kettle of the simplest combined reaction kettle is a hydrate generation decomposition area, and the hemispherical cover 22 or the flat sealing cover 21 is used for collecting sand produced in the hydrate decomposition process and flowing out through an exploitation port;
in all experimental reactor combinations of fig. 2-8, the left reactor section can be equivalently replaced with the combination of the central reactor plus the flat closure 21 because the central reactor wall 18 has all the injection, observation and extraction ports of the left and right reactor walls 1; the direction of the arrow in fig. 3-8 represents the flow direction of the sand during the hydrate decomposition process; the sand control screen pipe is simulated by adding the sand control screen pipe wall or the rigid well wall separation net 20 to the left and right of two sections of openings of the second left and right reaction kettle walls 17.
FIG. 3 shows three combinations of the sand control test for single well without observation area, which are sequentially illustrated from left to right; in the first combination mode (fig. 3(a)), a reaction kettle is vertically arranged, and a screen pipe sand production and prevention test of a sand control screen pipe below a hydrate reservoir is simulated, wherein a hydrate area, a sand control screen pipe area and a produced sand collecting port are arranged from top to bottom in sequence; in the second combination mode (fig. 3(b)), the reaction kettle is horizontally arranged, and a screen pipe sand production and prevention test of the sand control screen pipe on the right side of the hydrate reservoir is simulated, wherein a hydrate area, a sand control screen pipe area and a produced sand collecting port are arranged from left to right in sequence; in a third combination (fig. 3(c)), for a vertical reactor configuration, a screen sand control test was simulated with a sand control screen above the hydrate reservoir, from bottom to top, with a hydrate zone, a sand control screen zone, and a production sand collection port.
FIG. 4 shows two combinations of the two sand control tests for dual-well sand production without observation areas, which are sequentially illustrated from left to right; in the first combination mode (fig. 4(a)), a reaction kettle is vertically arranged, and a screen pipe sand production and prevention test of a sand prevention screen pipe above and below a hydrate reservoir is simulated, wherein the screen pipe sand production and prevention test comprises an exploitation sand collection port, a sand prevention screen pipe area, a hydrate area, a sand prevention screen pipe area and an exploitation sand collection port from top to bottom in sequence; in the second combination mode (fig. 4(b)), the reaction kettle is horizontally arranged, and a sand production and prevention test of the sand control screen pipe on the left side and the right side of the hydrate reservoir is simulated, wherein the sand production and prevention test comprises a production sand collecting port, a sand control screen pipe area, a hydrate area, a sand control screen pipe area and a production sand collecting port from left to right; the piston in the hydrate area is determined to be placed according to requirements, when the hydrate filler is required to be compacted, the piston can be placed to compact the hydrate filler, or the piston is not placed, and the hydrate filler is compacted in advance and is placed from openings at two sides of the central reaction kettle.
FIG. 5 shows four combinations of the sand control test for single well sand production in a single observation area, which are sequentially illustrated from left to right; in the first combination mode (fig. 5(a)), a reaction kettle is vertically arranged, and a screen pipe sand production and prevention test of a sand control screen pipe below a hydrate reservoir is simulated, wherein a hydrate area, a sand control screen pipe area, a sand production observation area and a produced sand collection port are sequentially arranged from top to bottom; in the second combination mode (fig. 5(b)), a reaction kettle is vertically arranged, and a sand production and prevention test of a screen pipe of a sand control screen pipe above a hydrate reservoir is simulated, wherein a hydrate area, a sand control screen pipe area, a sand production observation area and a production sand collection port are sequentially arranged from bottom to top; in the third combination mode (fig. 5(c)), the reaction kettle is horizontally arranged, and a screen pipe sand production and prevention test of the sand control screen pipe on the right side of the hydrate reservoir is simulated, wherein a hydrate area, a sand control screen pipe area, a sand production observation area and a production sand collection port are sequentially arranged from left to right; in the fourth embodiment (fig. 5(d)), in order to vertically arrange the reaction vessel, a screen sand production and control test is simulated in which a sand control screen is arranged below the hydrate reservoir, and the screen sand production and control test comprises a hydrate area, a sand control screen area, a sand production observation area and a produced sand collection port in sequence from top to bottom.
FIG. 6 shows three combinations of the two-well sand production and prevention test in a single observation area, which are sequentially illustrated from left to right; in the first combination mode (fig. 6(a)), the reaction kettle is horizontally arranged, and a screen pipe sand production and prevention test of the sand control screen pipe on the right side of the hydrate reservoir is simulated, wherein a hydrate area, a sand control screen pipe area, a sand production observation area, a production sand collection port, a sand control screen pipe area and a production sand collection port are sequentially arranged from left to right; in the second combination mode (fig. 6(b)), in order to vertically arrange the reaction kettle, a sieve tube sand production and prevention test of a sand prevention sieve tube above and below the hydrate reservoir is simulated, and a produced sand collecting port, a sand production observation area, a sand prevention sieve tube area, a hydrate area, a sand prevention sieve tube area and a produced sand collecting port are sequentially arranged from top to bottom; in the third combination mode (fig. 6(c)), the reaction kettle is vertically arranged, and a screen pipe sand production and prevention test of the sand control screen pipe below the hydrate reservoir is simulated, wherein the screen pipe sand production and prevention test comprises a hydrate area, a sand control screen pipe area, a sand production observation area, a sand control screen pipe area and a production sand production collecting port from top to bottom in sequence; the first and third of these three combinations have two sand control screen areas and two production sand collection ports because the simulated sand passes through the two sand control screens during hydrate production.
FIG. 7 shows two combinations of the single-well sand production and prevention tests in the dual observation areas, which are sequentially illustrated from left to right; in the first combination mode (fig. 7(a)), a reaction kettle is horizontally arranged, and a screen pipe sand production and prevention test that hydrate is hidden at the left and right sides of a sand control screen pipe is simulated, wherein a hydrate area, a sand control screen pipe area, a produced sand collecting port, a sand production observation area, a produced sand collecting port, a sand control screen pipe area and a hydrate area are sequentially arranged from left to right; in the second combination mode (fig. 7(b)), the reaction kettle is vertically arranged, and the simulation is that hydrate is stored in a sand production and sand control test above and below the sand control screen pipe, and the hydrate area, the sand control screen pipe area, the produced sand collecting port, the sand production observation area, the produced sand collecting port, the sand control screen pipe area and the hydrate area are sequentially arranged from top to bottom; the two combination modes well simulate the conditions of hydrate vertical well sand production and horizontal well sand production in the actual hydrate exploitation process.
Fig. 8 shows seven combinations of the two-well sand production and prevention test in the two observation areas, which are sequentially described from left to right, and sequentially described from top to bottom: the former two modes are respectively horizontal arrangement and vertical arrangement of the reaction kettle (figure 8(a)), sand is reversely far away from sand production, sand production and sand control tests of sand control screen pipes on the left and right of the hydrate reservoir and screen pipe sand production and control tests on the upper and lower parts of the hydrate reservoir are respectively simulated, the two modes are respectively a hydrate area, a sand control screen pipe area, a sand production observation area and a sand production collection port from the central reaction kettle to the two ends of the reaction kettle, and the existence of a piston of the central reaction kettle can be selected according to the compaction of hydrate fillers; thirdly, fourthly, fifthly, respectively, the reaction kettle is horizontally arranged, vertically arranged and vertically arranged, sand is produced in the same direction, and sand production and sand control tests (fig. 8(b)) of the sand control screen pipe on the right side, above and below the hydrate reservoir are simulated in sequence; the last two modes are respectively the horizontal arrangement and the vertical arrangement of the reaction kettles (figure 8(c)), the reaction kettles are reversely close to sand production, the simulation is that hydrate is hidden in the sand control screen pipe on the left and right sides and the screen pipe sand production test on the upper and lower sides, and the two modes are respectively a hydrate area, a sand control screen pipe area, a sand production observation area and a sand production collecting port from the two ends of the reaction kettles to the central reaction kettle in sequence.
The device has the characteristic of modularization, and is divided into a reaction kettle, a gas injection water sand system, a gas-water-sand separation metering system, a low-temperature water bath jacket system and a support and safety system in a sand prevention test for simulating the exploitation of the natural gas hydrate. The reaction kettles in the reaction kettle can be combined into different reaction kettles according to different experimental conditions and purposes; the reaction kettle mainly comprises: left and right reaction kettles, the next left and right reaction kettles, a central reaction kettle and a sealing cover. The reaction kettles without sieve tubes are combined by adding sealing covers on the left and right reaction kettles to realize the generation and decomposition of the hydrate; a series of sand production and prevention tests such as single wells and double wells without observation areas, single wells and double wells in single observation areas, single wells and double wells in double observation areas and the like can be simulated by combining the left reaction kettle, the right reaction kettle, the reaction kettle accessories (valves, seal covers, screens and the like) and the left reaction kettle, the right reaction kettle and the central reaction kettle in sequence; wherein the left and right reaction kettles and the central reaction kettle can be used as a hydrate generation decomposition area and an observation area, and the second left and right reaction kettles and the filter screens at the two ends can be used as sand control screen areas. The horizontal and vertical of the supporting frame can simulate vertical and horizontal sand production and prevention tests.
The production method can select depressurization production or heat injection production according to requirements, wherein the depressurization production is one of the main natural gas hydrate production methods at present, and is a process for generating methane gas from solid decomposition phase change by reducing the pressure of a hydrate layer to be lower than the equilibrium pressure of the hydrate under the temperature condition of the region. The design of the production well by the depressurization method is similar to that of conventional oil gas production, and the pressure in the hydrate reservoir with better permeability is quickly propagated, so the depressurization method is the most potential economic and effective production mode. Heat injection exploitation, also known as thermal excitation exploitation, is an exploitation method in which a natural gas hydrate layer is directly subjected to heat injection or heating to make the temperature of the natural gas hydrate layer exceed its equilibrium temperature, thereby promoting the natural gas hydrate to be decomposed into water and natural gas.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (9)
1. A detachable sand-discharging and sand-preventing reaction kettle for natural gas hydrate exploitation is characterized by comprising a first reaction kettle component, a second reaction kettle component, a third reaction kettle component, a ball valve, a separation net and a sealing cover, wherein the first reaction kettle component is a cylindrical shell with an opening at one end and a closed end, the second reaction kettle component and the third reaction kettle component are cylindrical shells with openings at two ends, preformed holes for installing sensors are formed in the cylindrical shells of the first reaction kettle component, the second reaction kettle component and the third reaction kettle component, the first reaction kettle component, the second reaction kettle component and the third reaction kettle component are further provided with a pressure relief port and a liquid discharge port, and the first reaction kettle component and the third reaction kettle component are provided with a sand injection port, a water injection port, a gas injection methane port, an exploitation port and an observation port, the closure cap has an access opening;
different combinations of the first reaction kettle assembly, the second reaction kettle assembly, the third reaction kettle assembly, the ball valve, the partition net and the sealing cover can realize simulation of sand production and prevention tests of single and double observation areas, single and double well exploitation and sand control screen pipes in different directions of natural gas hydrate reservoir storage.
2. The detachable sand-discharging and sand-preventing reaction kettle for natural gas hydrate exploitation according to claim 1, wherein the first reaction kettle assembly and the third reaction kettle assembly further comprise movable pistons, a nitrogen-injecting gas port is formed in one end of the first reaction kettle assembly, a nitrogen-injecting gas port is formed in a cylindrical shell of the third reaction kettle assembly, and the nitrogen-injecting gas port is used for injecting gas to drive the movable pistons to move towards the direction of the filler in the reaction kettle, wherein the first reaction kettle assembly is provided with a movable piston which moves towards the open end of the first reaction kettle assembly during operation, and the third reaction kettle assembly is provided with two movable pistons which move towards the two ends of the third reaction kettle assembly during operation.
3. The detachable sand-discharging and sand-preventing reaction kettle for natural gas hydrate exploitation according to claim 2, wherein when the reaction kettle is used for a single-well sand-discharging and sand-preventing test without an observation area, the reaction kettle is formed by sequentially assembling a first reaction kettle assembly, a ball valve, a partition net, a second reaction kettle assembly, the partition net and a sealing cover, wherein the first reaction kettle assembly is used for simulating a hydrate area, the ball valve, the partition net, the second reaction kettle assembly and the partition net are used for simulating a sand-preventing screen area, and the sealing cover is used for simulating an exploitation sand-discharging collection port; specifically, when the reaction kettle is vertically arranged and the sealing cover is positioned at the bottom end, a sieve tube sand production and prevention test of the sand control sieve tube below the hydrate reservoir is simulated; when the reaction kettle is horizontally arranged, a sand production and prevention test of the sand control screen pipe on the right side of the hydrate reservoir is simulated; when the reaction kettle is vertically arranged and the sealing cover is positioned at the top end, a sand-preventing and sand-preventing test of the sand-preventing screen pipe above the hydrate reservoir is simulated.
4. The detachable sand-producing and sand-preventing reaction kettle for natural gas hydrate exploitation according to claim 2, wherein when the reaction kettle is used for a double-well sand-producing and sand-preventing test without an observation area, the reaction kettle is formed by sequentially assembling a sealing cover, a partition net, a second reaction kettle component, the partition net, a ball valve, a third reaction kettle component, the ball valve, the partition net, a second reaction kettle component, the partition net and the sealing cover, the third reaction kettle component is used for simulating a hydrate area, the ball valve, the partition net, the second reaction kettle component and the partition net are used for simulating a sand-preventing screen area, and the sealing cover is used for simulating an exploitation sand-producing and sand-collecting port; specifically, when the reaction kettle is vertically arranged, a sieve tube sand production and prevention test of a sand prevention sieve tube above and below a hydrate reservoir is simulated; when the reaction kettle is horizontally arranged, a sand-preventing test of sand-preventing sieve tubes on the left side and the right side of the hydrate reservoir is simulated.
5. The detachable sand-producing and sand-preventing reaction kettle for natural gas hydrate exploitation according to claim 2, wherein when the reaction kettle is used for a single-well sand-producing and sand-preventing test of a single observation area, the reaction kettle is formed by sequentially assembling a first reaction kettle component, a ball valve, a partition net, a second reaction kettle component, the partition net and the first reaction kettle component, the first reaction kettle component close to the ball valve is used for simulating a hydrate area, the ball valve, the partition net, the second reaction kettle component and the partition net are used for simulating a sand-preventing screen area, and the first reaction kettle component far away from the ball valve is used for simulating a sand-producing observation area and a sand-producing and collecting port; specifically, when the reaction kettles are vertically arranged and the ball valve is close to the top end, a sieve tube sand production and prevention test of a sand prevention sieve tube below a hydrate reservoir is simulated, and at the moment, a first reaction kettle assembly far away from the ball valve is equivalent to a combination of a third reaction kettle assembly and a sealing cover; when the reaction kettle is vertically arranged and the ball valve is close to the bottom end, a sieve tube sand production and prevention test of the sand prevention sieve tube above the hydrate reservoir is simulated; when the reaction kettle is horizontally arranged, a sand-preventing test of sand production of the sieve tube of the sand-preventing sieve tube on the right side of the hydrate reservoir is simulated.
6. The detachable sand-producing and sand-preventing reaction kettle for natural gas hydrate exploitation according to claim 2, wherein when the reaction kettle is used as a double-well sand-producing and sand-preventing test of a single observation area, the reaction kettle comprises a first reaction kettle component, a ball valve, a separation net, a second reaction kettle component, a third reaction kettle component and a sealing cover; in particular, the amount of the solvent to be used,
when the reaction kettles are horizontally arranged, a sand-preventing and sand-preventing test of the sand-preventing sieve tube on the right side of the hydrate reservoir is simulated, the connection and assembly relationship is formed by sequentially assembling a first reaction kettle assembly, a ball valve, a separation net, a second reaction kettle assembly, the separation net, a third reaction kettle assembly, the separation net, a second reaction kettle assembly, the separation net, the ball valve and a seal cover, the first reaction kettle assembly is used for simulating a hydrate area, the ball valve, the separation net, the second reaction kettle assembly and the separation net are used for simulating a sand-preventing sieve tube area, the third reaction kettle assembly is used for simulating a sand observation area and a sand-producing collecting opening, the separation net, the second reaction kettle assembly, the separation net and the ball valve are used for simulating a sand-preventing sieve tube area, and the seal cover is used for simulating a sand-producing collecting;
when the reaction kettles are vertically arranged and the connection assembly relation is consistent with the horizontal arrangement of the reaction kettles, a sieve tube sand production and prevention test of a sand prevention sieve tube below a hydrate reservoir is simulated, the first reaction kettle component is used for simulating a hydrate region, the ball valve, the partition net, the second reaction kettle component and the partition net are used for simulating a sand prevention sieve tube region, the third reaction kettle component is used for simulating a sand production observation region and a sand production collection port, the partition net, the second reaction kettle component, the partition net and the ball valve are used for simulating a sand prevention sieve tube region, and the sealing cover is used for simulating a sand production collection port;
the reation kettle arranges perpendicularly and connects the equipment relation and be first reation kettle subassembly, separate the net, the second reation kettle subassembly, separate the net, the ball valve, the third reation kettle subassembly, the ball valve, separate the net, the second reation kettle subassembly, separate the net, when the closing cap is assembled in proper order, what simulate is that the sand control screen pipe is in hydrate and hides the screen pipe sand control test of top and below, first reation kettle subassembly is used for simulating sand observation district and is mined out sand and collect the mouth, separate the net, the second reation kettle subassembly, separate the net, the ball valve is used for simulating sand control screen pipe area, the third reation kettle subassembly is used for simulating hydrate district.
7. The detachable sand-producing and sand-preventing reaction kettle for natural gas hydrate exploitation according to claim 2, wherein when the reaction kettle is used for a single-well sand-producing and sand-preventing test of a double observation area, the reaction kettle is formed by sequentially assembling a first reaction kettle component, a partition net, a second reaction kettle component, a partition net, a ball valve, a third reaction kettle component, a ball valve, a partition net, a second reaction kettle component, a partition net and a sealing cover, the first reaction kettle is used for simulating a hydrate area, the partition net, the second reaction kettle component, the partition net and the ball valve are used for simulating a sand-preventing sieve tube area, the third reaction kettle component is used for simulating a sand-producing and sand-preventing test of a sieve tube with hydrates hidden at the left side and the right side of the sand-preventing sieve tube when the reaction kettle is horizontally arranged; when the reaction kettle is vertically arranged, a hydrate sand production and prevention test with sand concealed above and below the sand control screen pipe is simulated.
8. The detachable sand-producing and sand-preventing reaction kettle for natural gas hydrate exploitation according to claim 2, wherein when the reaction kettle is used as a double-well sand-producing and sand-preventing test of a double observation area, the reaction kettle comprises a first reaction kettle component, a separation net, a second reaction kettle component, a ball valve, a third reaction kettle component and a cover, and particularly,
the reaction kettles are horizontally or vertically arranged, and when the connection and assembly relationship is that a first reaction kettle component, a separation net, a second reaction kettle component, the separation net, a ball valve, a third reaction kettle component, a ball valve, the separation net, the second reaction kettle component, the separation net and a seal cover are sequentially assembled, a sand production and sand prevention test of the sand control screen pipe on the left side, the right side, the upper side and the lower side of the hydrate reservoir is respectively and correspondingly simulated, the third reaction kettle component is used for simulating a hydrate area, the separation net, the second reaction kettle component, the separation net and the ball valve are used for simulating a sand control screen area, the first reaction kettle component is used for simulating a sand production observation area, and the seal cover is used for simulating a sand production collection port;
when reation kettle horizontal arrangement and connection assembly relation were first reation kettle subassembly, ball valve, separate net, second reation kettle subassembly, separate net, third reation kettle subassembly, separate net, second reation kettle subassembly, separate net, ball valve and closing cap and assemble in proper order, the sand control screen pipe syntropy that goes out the sand of the screen pipe that simulates sand control screen pipe on the right side that hydrate was hidden goes out the sand control test, from reation kettle's left side to right side: the first reaction kettle component is used for simulating a hydrate area, the ball valve, the separation net, the second reaction kettle component and the separation net are used for simulating a sand control screen area, the third reaction kettle component is used for simulating a sand observation area and a mined sand collection port, and the first reaction kettle component is used for simulating a sand observation area and a mined sand collection port;
when reation kettle arranged perpendicularly and connect the equipment relation for first reation kettle subassembly, ball valve, separate net, second reation kettle subassembly, separate net, third reation kettle subassembly, separate net, second reation kettle subassembly, separate net, ball valve and closing cap and assemble in proper order, the sand control screen pipe of producing sand is experimental in the screen pipe syntropy of the top that hydrate was hidden, from reation kettle's below to top: the first reaction kettle component is used for simulating a hydrate area, the ball valve, the separation net, the second reaction kettle component and the separation net are used for simulating a sand control screen area, the third reaction kettle component is used for simulating a sand observation area and a mined sand collection port, and the first reaction kettle component is used for simulating a sand observation area and a mined sand collection port;
when reation kettle vertical arrangement and connection assembly relation were first reation kettle subassembly, ball valve, separate net, second reation kettle subassembly, separate net, third reation kettle subassembly, separate net, second reation kettle subassembly, separate net, ball valve and closing cap when assembling in proper order, the sand control screen pipe of producing sand is tested in the screen pipe syntropy of the below that hydrate was hidden, from reation kettle's top to below: the first reaction kettle component is used for simulating a hydrate area, the ball valve, the separation net, the second reaction kettle component and the separation net are used for simulating a sand control screen area, the third reaction kettle component is used for simulating a sand observation area and a mined sand collection port, and the first reaction kettle component is used for simulating a sand observation area and a mined sand collection port;
the reaction kettle is horizontally arranged or vertically arranged, and when the connection assembly relationship is that the first reaction kettle component, the ball valve, the separation net, the second reaction kettle component, the separation net, the third reaction kettle component, the separation net, the second reaction kettle component, the separation net, the ball valve and the sealing cover are sequentially assembled, the sand production sand control test that hydrate is hidden above and below the sand control screen pipe and is reversely close to the sand production is correspondingly simulated respectively, and the test is carried out from the two ends to the center of the reaction kettle: the first reaction kettle assembly is used for simulating a hydrate area, the ball valve, the separation net, the second reaction kettle assembly and the separation net are used for simulating a sand control screen area, and the third reaction kettle assembly is used for simulating a sand observation area and a sand mining collection port.
9. The detachable sand and sand control reaction kettle for natural gas hydrate exploitation according to any one of claims 1 to 8, wherein the sealing cover comprises a hemispherical cover and a flat sealing cover, the hemispherical cover is used when the reaction kettle is vertically arranged, the flat sealing cover is used when the reaction kettle is horizontally arranged, and the assembly of the third reaction kettle component and the sealing cover is equivalent to the assembly of the first reaction kettle component.
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| CN112067785B (en) * | 2020-08-07 | 2021-05-14 | 中国科学院广州能源研究所 | Detachable reaction device and method for sand production and prevention simulation test of natural gas hydrate |
| CN115656463B (en) * | 2022-11-01 | 2024-06-18 | 江苏联友科研仪器有限公司 | Full visual seam width variable hydrate simulation test kettle |
| CN115492572B (en) * | 2022-11-21 | 2023-01-17 | 吉林大学 | One-dimensional simulation device and method for secondary formation of natural gas hydrate |
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