CN106771064B - Multiple superposed gas system vertical well exploits simulated test facility - Google Patents
Multiple superposed gas system vertical well exploits simulated test facility Download PDFInfo
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Abstract
The invention discloses a kind of multiple superposed gas system vertical wells to exploit simulated test facility, including cabinet and case lid, one end of cabinet is fitted with drainage tube, the other end is fitted with first level pressure head, at least two second horizontal pressure heads are inserted in the side of cabinet, it is inserted on case lid and the second horizontal pressure head vertical pressure head correspondingly, pressing plate is respectively fixed in the inner end of each pressure head, bottom, which is equipped with, in cabinet is equipped with airflow channel with the one-to-one air permeable plate of vertical pressure head, each air permeable plate lower section；Drainage tube includes the outer tube being fixed on cabinet and the inner tube that is inserted in outer tube, it is equipped with and the one-to-one extraction area of air permeable plate on outer tube, outer drainage holes are provided in each extraction area, there is partition between two neighboring extraction area, inner tube and extraction area correspond, the inner end of inner tube is provided with the interior drainage holes being located in corresponding extraction area, to provide a kind of multiple superposed gas system vertical well exploitation simulated test facility easy to use, efficient.
Description
Technical field
The invention belongs to Coal-seam Gas Recovery Technologies fields, in particular, in particular to a kind of multiple superposed gas system hangs down
Straight well exploits simulated test facility.
Background technique
Currently, as sustained economic development is to the worsening shortages of the increasingly increase and conventional gas and oil resource of energy demand, generation
Jie Ge state all develops the new energy in positive find, to make up the notch of conventional gas and oil resource.Coal bed gas (being commonly called as gas) is system
About one of the principal element of coal mine downhole safety production, but be also a kind of good energy can be used for generating electricity, warm oneself, chemical industry etc.
Various fields.Therefore, coal bed gas resource is reasonably developed, the generation of accident of mine disaster can not only be greatly decreased, but also is facilitated
Reduce dependence of the national economy to conventional gas and oil resource.
Chinese Regional is vast, and coal bed gas resource is abundant, and total resources is 30 × 1012~35 × 1012m3, wherein buried depth 300
Coal bed gas total resources is about 25 × 10 within the scope of~1500m12m3.As traditional coal seam gas exploration develops hot zones (Qinshui
Basin, Ordos Basin etc.) research it is gradually perfect, other areas, type bed gas reservoirs to become coal bed gas industry new
Research, exploration, exploitation growth point.Coal bed gas resource exploration in Eastern Yunnan Province And Guizhou Province, china area is one of the content of national " 13 " planning,
The area has the geology characteristic of " one weak, more than two, three high, four big ": i.e. Lungtan Formation watery is weak, controls gas structural type mostly and coal seam
The number of plies is more, and coal-bed gas content is high, resource abundance is high, reservoir pressure and crustal stress is high and Coal bed gas project is big, coal rank variation
Greatly, coal seam permeability variation greatly with geological conditions vertical variations greatly.Coal bed gas for single coal bed, under the conditions of multiple seam
Storage has its particularity, and forefathers tentatively propose and demonstrate " multilayer based on the coalfield river Shui Gong is received to oblique analysis and research to knitting
It is stacked independent to contain coalbed methane system " academic viewpoint.
Due to the above-mentioned geological conditions feature of southwest, area coal bed gas resource basis abundant is on the one hand constituted,
Another aspect northern China or even external effective coal bed gas routine development technique can not be applicable in the area.At present about coal
The research of layer gas exploitation focuses mostly in single coal bed, is badly in need of new theory, new technology, new process to instruct southwest multiple superposed
The exploitation of gas system vertical well.Therefore, for this particularity of area's geological conditions, the applicable production practice of research and development
And technology, become the inevitable choice for promoting area's coal bed gas scale exploitation.So carrying out multiple superposed gas system vertical well
Simulation test is exploited, reservoir properties dynamic evolution rule and interlayer interference mechanism in its recovery process are studied, to coordination multi-laminate
It sets each system in development area and carries out orderly, progressive exploitation, avoid interfering with each other between system in recovery process, realize coal bed gas money
The exploitation of source high-efficiency and economic, has highly important theoretical research value and practical directive significance.
And traditional coal and gas drainage simulation test case and drainage tube are directed to the design of single layer gas system, it can not mould
Quasi- multiple superposed gas system, can not realize the layering extraction of multiple superposed gas system vertical well.Application No. is
The patent of invention of " 201310025114.7 " provides a kind of " coal bed gas extraction test method during multiple seam unitized production ",
Describe a kind of chamber for multiple seam unitized production simulation test and drainage tube simultaneously in the application documents of the patent.
Multiple horizontal pressure heads and vertical pressure head are wherein equipped in chamber along its length, drainage tube uses the structure of outer tube and inner tube,
Wherein inner tube is docked by multistage.It can not be observed not using this chamber and drainage tube when carrying out extraction to multiple seam
With the respective gas flow in coal seam, it is unfavorable for studying influencing each other between different coal, also, single layer can not be carried out and successively opened
It adopts or progressive Mining Test.
Summary of the invention
Technical problem to be solved by the present invention lies in providing, one kind is easy to use, efficient multiple superposed gas system is vertical
Straight well exploits simulated test facility.
Technical scheme is as follows: a kind of multiple superposed gas system vertical well exploitation simulated test facility, including
Cabinet and case lid are fitted with drainage tube in the wherein one end of the cabinet along its length, and the drainage tube includes being fixed on case
Outer tube on body and the inner tube being inserted into outer tube, are fitted with first level pressure in the other end of the cabinet along its length
Head, the inner end of the first level pressure head, which is fixed with, is located in the box body the first vertical pressing plate, in the cabinet along width side
To side be fitted at least two second horizontal pressure heads, the second horizontal pressure head is evenly arranged along the length direction of cabinet,
The center line of the second horizontal pressure head and first level pressure head is mutually perpendicular to, equal in the inner end of each second horizontal pressure head
Be fixed with the second vertical pressing plate, be fitted on the case lid with the second horizontal pressure head vertical pressure head correspondingly, every
The inner end of the one vertical pressure head, which is respectively and fixedly provided with, is located in the box body horizontal third pressing plate, in the cabinet bottom be provided with
The vertical one-to-one air permeable plate of pressure head, is equipped with airflow channel below each air permeable plate, and the one of the airflow channel
End is penetrated through by air permeable plate and cabinets cavity, and the other end of airflow channel through cabinet exterior and is fixedly connected with pipe fitting；?
The outer tube be equipped with the one-to-one extraction area of air permeable plate, offer outer drainage holes in each extraction area of outer tube,
Partition is provided between the adjacent Liang Ge extraction area of the outer tube, adjacent extraction area is sealed partition by the partition；It is described
The quantity of inner tube and the quantity in extraction area correspond, and the inner end of inner tube is protruded into corresponding extraction area, and is opened up on inner pipe
There are the interior drainage holes being located in corresponding extraction area.
Using the above structure, the one-to-one second horizontal pressure head, vertical pressure head, air permeable plate and air-flow are set in cabinet
Channel, and setting and the one-to-one extraction area of air permeable plate on the outer tube of drainage tube, fill with extraction area one by one in outer tube interpolation
Corresponding inner tube is set to provide a kind of multiple superposed gas system vertical well exploitation simulation test easy to use, efficient
It is standby.When carrying out simulation test, it is only necessary to be packed into spaced apart coal seam and analog material in cabinet, and it is ventilative to be located at coal seam
Plate upper area, analog material are spaced between adjacent coal seam (namely between adjacent air permeable plate upper area), Ji Ketong
It crosses with the one-to-one air permeable plate in coal seam and airflow channel to any independent coal seam or coal seam or wherein three coal seams two-by-two
It the operation such as vacuumized, be filled with methane gas, be filled with carbon dioxide gas, it is different that different coal gas content can be simulated
Multiple superposed gas system, this is that existing coal cannot achieve with gas drainage simulated test facility；Moreover drainage tube is arranged
For outer tube and inner tube structure, setting and the one-to-one extraction area of air permeable plate on outer tube, sealed spacer between adjacent extraction area
There is partition, quantity and the extraction area of inner tube are arranged in a one-to-one correspondence, when test, it is only necessary to outer tube are embedded in cabinet, Ji Keli
Simultaneously or gas drainage simulation test is not carried out simultaneously to corresponding coal seam with the different inner tubes in outer tube, this is also existing coal
It cannot achieve with gas drainage simulated test facility, on the one hand compensate for the blank of existing simulated test facility, convenient for seeing
Influencing each other between different coal, provides material base for follow-up study, is on the other hand more during survey gas drainage
The exploitation that gas system vertical well extraction drainage tube is set in stacking provides reference.
The outer tube is mounted on cabinet by coupling in a tubular form and pressing sleeve, and the coupling screw thread socket is outside
The outer end of pipe, and circumferentially extension forms circular first baffle for the outer end of coupling, and the pressing sleeve is plugged on the outer of outer tube
End, and circumferentially extension forms circular second baffle for the outer end of pressing sleeve, and first baffle is fixed by the second baffle
On the correspondence end plate of cabinet；Nipple is plugged in the pressing sleeve, the outer end of the nipple, which is circumferentially extended, forms annulus
The third baffle of shape, the third baffle are fixed on the second baffle of pressing sleeve, are offered in the nipple and inner tube one
One corresponding axially extending bore, the inner end of the through-hole are docked with corresponding inner tube, are respectively connected in the outer end of each through-hole
Pipe fitting.Outer tube is fixed on cabinet by coupling and pressing sleeve, the fixed structure of outer tube is simply secured, and easy to operate
Fast.Inner tube is mounted in outer tube by nipple and pressing sleeve, keeps the mounting structure of inner tube simple, secured.
It is lined with sealing ring between corresponding end plate of the first baffle with cabinet, in the second baffle towards first gear
The side of plate is provided with recessed portion, and the first baffle is located in the recessed portion, pads between the first baffle and second baffle
There is sealing ring, is also lined with sealing ring between the second baffle and third baffle.
Said inner tube is made of the closed tube body in front end, and tube wall makes tube body in front fine and rear thick ladder-like
Outer wall forms step surface corresponding with partition, and the step surface keeps off the rear end in corresponding partition, and in the confession of each partition
Embedded with the sealing ring with outer wall of inner tube sealing cooperation in the via hole that pipe is worn.The stair-stepping inner tube of outer wall is set in this way, is made interior
The installation of pipe is more quick, and gasket can also be arranged on step surface, is conducive to further ensure that the mutual of each extraction area
Sealing.
There are four the second horizontal pressure head is evenly arranged along the length direction of cabinet, the vertical pressure head and second horizontal
Pressure head corresponds there are four arrangements, and the air permeable plate and vertical pressure head correspond there are four arrangements, the pumping on the outer tube
Exploiting field and air permeable plate correspond there are four arrangements, and said inner tube and extraction area correspond there are four arrangements, the nipple
On the through-hole that opens up it is circumferentially uniformly distributed there are four.
Outer drainage holes in each extraction area of outer tube are circumferentially evenly equipped with multiple, the interior drainage holes institute in said inner tube
The outer drainage holes region described in the face of region.
Pad is equipped with " O " shape sealing ring between the case lid and top of the box.
The utility model has the advantages that the present invention in cabinet by being arranged the one-to-one second horizontal pressure head, vertical pressure head, air permeable plate
And airflow channel, and setting and the one-to-one extraction area of air permeable plate on the outer tube of drainage tube, outer tube is interior to be inserted and extraction area
One-to-one inner tube, to provide a kind of multiple superposed gas system vertical well exploitation simulation examination easy to use, efficient
Test equipment, have the characteristics that be skillfully constructed, structure is simple, production be easy it is low with production cost.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the top view of cabinet in Fig. 1.
Fig. 3 is the A-A cross-sectional view that Fig. 1 removes drainage tube.
Fig. 4 is the structural schematic diagram of drainage tube.
Fig. 5 is the portion the I enlarged drawing of Fig. 4.
Fig. 6 is the portion the J enlarged drawing of Fig. 4.
It is marked in figure as follows: outer tube 1, partition 2, inner tube 3, coupling 4, first baffle 4a, pressing sleeve 5, second baffle 5a, interior
Connector 6, third baffle 6a, through-hole 6b, pipe fitting 7, cabinet 8, " O " shape sealing ring 9, case lid 10, vertical pressure head 11, third pressing plate
12, the first pressing plate 13, first level pressure head 14, air permeable plate 15, the second horizontal pressure head 16, the second pressing plate 17, airflow channel 18.
Specific embodiment
The embodiment of the present invention is described below in detail, the embodiment described example is shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
Figure description embodiment is exemplary, it is intended to be explained the present invention, and is not considered as limiting the invention.
With reference to the accompanying drawing, by being further described to a specific embodiment of the invention, make technology of the invention
Scheme and its benefits are clearer.
As shown in Figure 1, Figure 2 and Figure 3, the present invention includes cabinet 8 and case lid 10, in the case lid 10 and 8 top of cabinet
Between pad be equipped with " O " shape sealing ring 9.Drainage tube, the drainage tube packet are fitted in the wherein one end of the cabinet 8 along its length
The inner tube 3 for including the outer tube 1 being fixed on cabinet 8 and being inserted into outer tube 1.It is inserted in the other end of the cabinet 8 along its length
Equipped with first level pressure head 14, the first vertical pressure in cabinet 8 is fixed in the inner end of the first level pressure head 14
Plate 13.At least two second horizontal pressure heads 16, the second horizontal pressure head are fitted in the side of the cabinet 8 in the width direction
16 are evenly arranged along the length direction of cabinet 8, and the center line of the second horizontal pressure head 16 and first level pressure head 14 mutually hangs down
Directly.The second vertical pressing plate 17 is respectively and fixedly provided in the inner end of each second horizontal pressure head 16.It is inserted on the case lid 10
Have with the one-to-one vertical pressure head 11 of the second horizontal pressure head 16, be respectively and fixedly provided with and be located in the inner end of each vertical pressure head 11
Horizontal third pressing plate 12 in cabinet 8.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, it is provided at the interior bottom of the cabinet 8 one-to-one with vertical pressure head 11
Air permeable plate 15, is equipped with airflow channel 18 below each air permeable plate 15, and one end of the airflow channel 18 passes through ventilative
Plate 15 and 8 inner cavity of cabinet penetrate through, and the other end of airflow channel 18 through 8 outer wall of cabinet and is fixedly connected with pipe fitting 7.Described
Outer tube 1 be equipped with the one-to-one extraction area of air permeable plate 15, offer outer drainage holes in each extraction area of outer tube 1,
Partition 2 is provided between the adjacent Liang Ge extraction area of the outer tube 1, adjacent extraction area is sealed partition by the partition 2.Institute
The quantity of the quantity and extraction area of stating inner tube 3 corresponds, and the inner end of inner tube 3 is protruded into corresponding extraction area, and in inner tube 3
Offer the interior drainage holes being located in corresponding extraction area.
As shown in Figure 4 and Figure 5, the outer tube 1 is mounted on cabinet 8 by coupling 4 in a tubular form and pressing sleeve 5, institute
The outer end that 4 screw thread of coupling is socketed pipe 1 outside is stated, and circumferentially extension forms circular first baffle for the outer end of coupling 4
4a.The pressing sleeve 5 is plugged on the outer end of outer tube 1, and circumferentially extension forms circular second baffle 5a for the outer end of pressing sleeve 5,
First baffle 4a is pressed abd fixed on the correspondence end plate of cabinet 8 by the second baffle 5a.It is plugged in the pressing sleeve 5 inscribed
First 6, the outer end of the nipple 6 third baffle 6a, the third baffle 6a that circumferentially extension forms annular shape are fixed on pressing sleeve 5
Second baffle 5a on, offered in the nipple 6 with the one-to-one axially extending bore 6b of inner tube 3, the through-hole 6b's
Inner end is docked with corresponding inner tube 3, is respectively connected with pipe fitting 7 in the outer end of each through-hole 6b.In the first baffle 4a
It is lined with sealing ring between the corresponding end plate of cabinet 8, is provided with recess in the side of second baffle 5a towards the first baffle 4a
Portion, the first baffle 4a are located in the recessed portion, are lined with sealing ring between the first baffle 4a and second baffle 5a,
Sealing ring is also lined between the second baffle 5a and third baffle 6a.
As shown in Figure 4 and Figure 6, said inner tube 3 is made of the closed tube body in front end, and tube wall is in front fine and rear thick
It is ladder-like, so that the outer wall of tube body is formed step surface corresponding with partition 2, the step surface keeps off the rear end in corresponding partition 2, and
And embedded with the sealing ring with the sealing cooperation of 3 outer wall of inner tube in the via hole that each partition 2 is worn for inner tube 3.The outer tube 1 is every
Outer drainage holes in one extraction area be circumferentially evenly equipped with it is multiple, it is outer described in the interior drainage holes region face in said inner tube 3
Drainage holes region.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, the present embodiment preferably second horizontal pressure head 16 is along the length side of cabinet 8
There are four being evenly arranged, the vertical pressure head 11 and the second horizontal pressure head 16 are corresponded there are four arrangements.The air permeable plate
15 correspond there are four arrangements with vertical pressure head 11, and extraction area on the outer tube 1 and air permeable plate 15 are corresponded and be disposed with
Four, said inner tube 3 and extraction area correspond there are four arrangements, and the through-hole 6b opened up on the nipple 6 is circumferentially evenly equipped with
Four.
Claims (7)
1. a kind of multiple superposed gas system vertical well exploits simulated test facility, including cabinet and case lid, on the cabinet edge
Wherein one end of length direction is fitted with drainage tube, and the drainage tube includes the outer tube being fixed on cabinet and is inserted into outer tube
Inner tube, be fitted with first level pressure head, the inner end of the first level pressure head in the other end of the cabinet along its length
It is fixed with and is located in the box body the first vertical pressing plate, be fitted at least two second in the side of the cabinet in the width direction
Horizontal pressure head, the second horizontal pressure head are evenly arranged along the length direction of cabinet, in each second horizontal pressure head
End is respectively and fixedly provided with the second vertical pressing plate, be fitted on the case lid with the second horizontal pressure head vertical pressure head correspondingly,
It is respectively and fixedly provided in the inner end of each vertical pressure head and is located in the box body horizontal third pressing plate, it is characterised in that: described
In cabinet bottom be provided with the one-to-one air permeable plate of vertical pressure head, be equipped with airflow channel below each air permeable plate,
One end of the airflow channel is penetrated through by air permeable plate and cabinets cavity, and the other end of airflow channel runs through cabinet exterior and fixation
It is connected with pipe fitting；On the outer tube be equipped with the one-to-one extraction area of air permeable plate, in each extraction area of outer tube
Outer drainage holes are offered, are provided with partition between the adjacent Liang Ge extraction area of the outer tube, the partition is by adjacent extraction
Area's sealing partition；The quantity of said inner tube and the quantity in extraction area correspond, and the inner end of inner tube is protruded into corresponding extraction area, and
And the interior drainage holes being located in corresponding extraction area are offered on inner pipe.
2. multiple superposed gas system vertical well according to claim 1 exploits simulated test facility, it is characterised in that: institute
It states outer tube to be mounted on cabinet by coupling in a tubular form and pressing sleeve, the outer end of coupling screw thread socket pipe outside,
And the outer end of coupling circumferentially extends and forms circular first baffle, and the pressing sleeve is plugged on the outer end of outer tube, and presses
The outer end of set circumferentially extends and forms circular second baffle, and first baffle is pressed abd fixed on pair of cabinet by the second baffle
It answers on end plate；Nipple is plugged in the pressing sleeve, the outer end of the nipple, which is circumferentially extended, forms circular third gear
Plate, the third baffle are fixed on the second baffle of pressing sleeve, are offered in the nipple and the one-to-one axis of inner tube
To through-hole, the inner end of the through-hole is docked with corresponding inner tube, is respectively connected with pipe fitting in the outer end of each through-hole.
3. multiple superposed gas system vertical well according to claim 2 exploits simulated test facility, it is characterised in that:
It is lined with sealing ring between the first baffle and the corresponding end plate of cabinet, is opened in the side of the second baffle towards first baffle
There is recessed portion, the first baffle is located in the recessed portion, it is lined with sealing ring between the first baffle and second baffle,
Sealing ring is also lined between the second baffle and third baffle.
4. multiple superposed gas system vertical well according to claim 3 exploits simulated test facility, it is characterised in that: institute
State inner tube to be made of the closed tube body in front end, and tube wall is in front fine and rear thick ladder-like, make the outer wall of tube body formed with
The corresponding step surface of partition, the step surface keep off the rear end in corresponding partition, and the mistake worn in each partition for inner tube
Embedded with the sealing ring with outer wall of inner tube sealing cooperation in hole.
5. multiple superposed gas system vertical well according to claim 4 exploits simulated test facility, it is characterised in that: institute
It states there are four the second horizontal pressure head is evenly arranged along the length direction of cabinet, the vertical pressure head and the second horizontal pressure head one are a pair of
There are four should arranging, the air permeable plate and vertical pressure head correspond the extraction area there are four arrangements, on the outer tube and breathe freely
Plate corresponds there are four arrangements, and said inner tube and extraction area correspond there are four arrangements, and what is opened up on the nipple is logical
There are four hole is circumferentially uniformly distributed.
6. multiple superposed gas system vertical well described according to claim 1 or 2 or 3 or 4 or 5 exploits simulated test facility,
It is characterized by: the outer drainage holes in each extraction area of outer tube are circumferentially evenly equipped with multiple, the interior extraction in said inner tube
Outer drainage holes region described in the face of hole region.
7. multiple superposed gas system vertical well according to claim 6 exploits simulated test facility, it is characterised in that:
Pad is equipped with " O " shape sealing ring between the case lid and top of the box.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109488256A (en) * | 2018-12-03 | 2019-03-19 | 重庆大学 | A kind of test mining pipe for multiple seam ground straight well coal-bed gas exploitation |
| CN110306964B (en) * | 2019-07-02 | 2020-08-21 | 中国矿业大学 | Hydraulic fracturing coal seam crack visualization and permeability increasing effect evaluation method |
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