CN105937386A - Layered ignition process pipe column and layered ignition method thereof - Google Patents
Layered ignition process pipe column and layered ignition method thereof Download PDFInfo
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- CN105937386A CN105937386A CN201610486246.3A CN201610486246A CN105937386A CN 105937386 A CN105937386 A CN 105937386A CN 201610486246 A CN201610486246 A CN 201610486246A CN 105937386 A CN105937386 A CN 105937386A
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- 238000000034 method Methods 0.000 title claims abstract description 56
- 238000002347 injection Methods 0.000 claims abstract description 235
- 239000007924 injection Substances 0.000 claims abstract description 235
- 239000003129 oil well Substances 0.000 claims abstract description 9
- 238000002485 combustion reaction Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000001802 infusion Methods 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 11
- 239000003921 oil Substances 0.000 description 91
- 239000010410 layer Substances 0.000 description 45
- 238000011161 development Methods 0.000 description 6
- 210000003437 trachea Anatomy 0.000 description 5
- 239000002356 single layer Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/14—Obtaining from a multiple-zone well
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/243—Combustion in situ
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- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
Abstract
The invention is a layered ignition process tubular column and its layered ignition method, the layered ignition process tubular column is set up in the sleeve pipe of the oil well with upper oil reservoir and lower oil reservoir, including the double-deck gas injection tube bank, the double-deck gas injection tube bank includes concentric inner tube and outer tube, set up the electric igniter in the inner tube, the bottom of the double-deck gas injection tube bank, and position locating at upper oil reservoir fixedly connect with the layered gas injection tool, the bottom of the layered gas injection tool connects with the lower end tubular column that link up from top to bottom that extends to the lower oil reservoir; the layered gas injection tool is provided with an inner pipe gas injection channel and an outer pipe gas injection channel, and the inner pipe gas injection channel can be slidably provided with a sliding plug for changing the gas flow direction in the inner pipe gas injection channel. When the pipe column is used for layered ignition, the lower oil layer is ignited first and then the upper oil layer is ignited. The layered ignition process pipe column and the layered ignition method thereof realize the respective ignition and quantitative gas injection of the two oil layers in the fireflood process, effectively reduce the cost and improve the fireflood effect.
Description
Technical field
The present invention relates to oil well production field, particularly relate to a kind of layering igniting process tubular column and ignition method thereof.
Background technology
Fireflood is Development of Viscous Crude Oil later stage important conversion regime.In fireflood development process, oil reservoir is in longitudinal direction
There is larger difference on development degree, each layer air-breathing is uneven, there is monolayer and advances by leaps and bounds, causes gas injection well air injection
It is big that parameter improves difficulty, and producing well then shows as constructing high-order bit and first takes effect, and takes effect, and deposit after lower location of the structure
In inequality the problem that has phenomenon of advancing by leaps and bounds of taking effect.Gas entry profile monitoring result shows: the overall development degree of fireflood is whole
Body reaches 75%, but upper producing status exists larger difference.For improving fireflood oil reservoir longitudinal direction producing status,
Solve the contradiction that gas injection is uneven, it is necessary to carry out the research of fireflood layered gas-injection technology and on-the-spot test, to realize
The relatively uniform gas injection of gas injection well, improves fireflood development effectiveness.Layering fireflood is on the basis of conventional fireflood,
Artificial is layered exploitation target zone, it is achieved layering fireflood exploitation, it is ensured that the weight of layering fireflood development effectiveness
Point is successful ignition and the gas injection of every substratum, to form stable combustion front, it is achieved driving smoothly of underground crude oil
Replace.
Combustion in situ is successfully it is crucial that the success of oil layer ignition.Oil layer ignition mainly has chemic ignition, electric ignition
Two kinds, during electrically-fired, oil reservoir around is heated by lighter, and well head auxiliary air injects and makes oil
There is spontaneous ignition in layer.Needing persistently to inject certain amount of air according to oil reservoir combustion characteristics after lighting a fire successfully makes oil reservoir easy
Combustion part keeps burning, high solidifying oil Heated Flow and extraction.Electric ignition technology can be obtained more by electric heater
High firing temperature, it is adaptable to the oil well that oil reservoir burning threshold temperature is higher, but present stage individual well electric ignition is restricted
In tubular column structure, the monolayer igniting quantitative gas injection of monolayer, the existing rank of multi-layer firing multilamellar quantitative gas injection respectively can only be carried out
Duan Wufa realizes.
Thus, the present inventor relies on experience and the practice being engaged in relevant industries for many years, proposes a kind of demixing point firer
Skill tubing string and ignition method thereof, light a fire and quantitative gas injection respectively with two oil reservoirs during realizing fireflood.
Summary of the invention
It is an object of the invention to provide a kind of layering igniting process tubular column and ignition method thereof, overcome prior art
The problem that middle monolayer ignition process exists, it is achieved during fireflood, two oil reservoirs are lighted a fire and quantitative gas injection respectively, have
Effect reduces cost, improves fireflood effect.
The object of the present invention is achieved like this, a kind of layering igniting process tubular column, described demixing point ignition technique pipe
Post is arranged in the sleeve pipe of the oil well with top oil reservoir and bottom oil layer, sleeve pipe is provided with top oil reservoir and under
The sieve aperture of portion's oil reservoir connection, described layering igniting process tubular column includes the Double layered air that top connects with wellhead assembly
Pipe group, described Double layered air pipe group includes the inner and outer tubes being arranged concentrically, shape between said inner tube and described outer tube
Become lower floor's gas injection annular space, said inner tube arranges electric igniter, described layering igniting process tubular column overlaps from top to bottom
It is provided with packing top oil reservoir and the first packer of well head, top oil reservoir and bottom oil layer and the second packer；
The bottom of described Double layered air pipe group and be positioned at the position of top oil reservoir and be fixedly connected with layered gas-injection work
Tool, the bottom of described layered gas-injection instrument connects the lower end tubing string having the up/down perforation extending to bottom oil layer；Institute
State and layered gas-injection instrument is provided with inner tube gas injection passage that top connects with said inner tube, bottom lock, institute
State and layered gas-injection instrument is additionally provided with the inner chamber that can connect described lower floor gas injection annular space and described lower end tubing string
Outer tube gas injection passage, on the sidewall of said inner tube gas injection passage, through being provided with can connect described outer tube gas injection passage
The first gas outlet, on the sidewall of said inner tube gas injection passage, the most through being provided with can connect the second of top oil reservoir
Gas outlet, can be provided with gas flowing in change said inner tube gas injection passage slidably in said inner tube gas injection passage
The sliding plug in direction.
In a better embodiment of the present invention, described layered gas-injection instrument includes a main body, described main body
Center arranges said inner tube gas injection passage, in described main body, be positioned at said inner tube gas injection passage side arrange
Described outer tube gas injection passage, the sidewall bottom that said inner tube gas injection passage is adjacent with described outer tube gas injection passage is arranged
Described first gas outlet, the sidewall of the opposite side of said inner tube gas injection passage is provided above described second gas outlet,
The center of described sliding plug is provided with the air passing hole of up/down perforation；Described sliding plug is positioned at said inner tube gas injection and leads to
Described in during the top in road, the second gas outlet is closed, the inner chamber of said inner tube, described air passing hole, said inner tube gas injection
Passage, described first gas outlet, described outer tube gas injection passage and described lower end tubing string, described sieve aperture constitute bottom
Oil layer ignition passage；First gas outlet described in when described sliding plug is positioned at the lower section of said inner tube gas injection passage is sealed
Closing, the inner chamber of said inner tube, said inner tube gas injection passage, described second gas outlet, described sieve aperture constitute top
Oil layer ignition passage.
In a better embodiment of the present invention, the center of described main body arranges the through hole of up/down perforation, institute
The bottom stating through hole is fixedly connected with the fixing plug sealing described via bottoms, and the top of described fixing plug forms institute
State inner tube gas injection passage.
In a better embodiment of the present invention, the top side wall of said inner tube gas injection passage is tightly connected described
Bottom the outer wall of inner tube, the top down of described main body is provided with link slot, and the sidewall of described link slot is with described
The outer wall sealed bottom of outer tube connects, and described lower floor gas injection annular space turns on described outer tube gas injection channel seal.
In a better embodiment of the present invention, the side wall upper part of said inner tube gas injection passage is provided with shear pin
Nail, the outer wall energy of described sliding plug is connected on described shear pin.
In a better embodiment of the present invention, the bottom of described layered gas-injection instrument connects has transition to connect
Pipe, the bottom of described transitional connection pipe is fixing connects described lower end tubing string.
In a better embodiment of the present invention, described transitional connection pipe is positioned at described layered gas-injection instrument
Lower section is provided with the Taper Pipe section that diameter is the most tapered.
In a better embodiment of the present invention, described wellhead assembly is provided with in connecting with said inner tube
Pipe air injection pipe, described wellhead assembly is additionally provided with the outer tube air injection pipe connected with described lower floor gas injection annular space.
In a better embodiment of the present invention, the outer wall of described outer tube is positioned at the position set above the oil reservoir of top
If described first packer, described lower end tubing string position between described top oil reservoir and described bottom oil layer
Sheathed described second packer.
The purpose of the present invention can also be achieved in that, one utilizes described layering igniting process tubular column to carry out demixing point
The method of fire, comprises the following steps:
Step one: layering igniting process tubular column is installed in the sleeve pipe of oil well；
Step 2: light a fire bottom oil layer: gas injection in inner tube, starts electric igniter and adds injecting gas
Heat, air passing hole that the gas of heating is arranged on sliding plug, inner tube gas injection passage, the first gas outlet, outer tube note
Gas passage, lower end tubing string, sieve aperture flow into bottom oil layer, light a fire bottom oil layer；
After bottom oil layer igniting, continuing gas injection in inner tube, gas continues into bottom oil layer, under supply
Portion's oil reservoir combustion needs；
Step 3: top oil reservoir is lighted a fire: well head uses infusion appliance to make electric igniter lower end push down on cunning
Moving plug, sliding plug slide downward falls inner tube gas injection channel bottom, and sliding plug closes the first gas outlet, and inner tube is noted
Gas passage and outer tube gas injection channel separation, to lower floor's gas injection annular air injection, gas is by lower floor's gas injection annular space, outer
Pipe gas injection passage, lower end tubing string flow into bottom oil layer, supply bottom oil layer combustion needs；Second gas outlet
Open, in inner tube gas after electric igniter heats through inner tube gas injection passage, the second gas outlet, sieve aperture flow into
Enter top oil reservoir, to top oil layer ignition；
After igniting, from well head respectively to top oil reservoir and bottom oil layer gas injection, it is achieved top oil reservoir and bottom
The hierarchical control of the gas injection rate of oil reservoir.
In a better embodiment of the present invention, in step one, inner tube top and setting on wellhead assembly
Inner tube air injection pipe connects, and lower floor's gas injection annular space top connects with the outer tube air injection pipe arranged on wellhead assembly, slides
Plug is fixed on the top of inner tube gas injection passage, to close the second gas outlet.
In a better embodiment of the present invention, in step 2, close outer tube air injection pipe, open inner tube note
Trachea, by the gas injection in inner tube of inner tube air injection pipe.
In a better embodiment of the present invention, in step 3, inner tube air injection pipe and outer tube air injection pipe divide
Not to top oil reservoir and bottom oil layer gas injection, adjust inner tube air injection pipe and the gas injection rate of outer tube air injection pipe, it is achieved on
The hierarchical control of the gas injection rate of portion's oil reservoir and bottom oil layer.
From the above mentioned, the layering igniting process tubular column of present invention offer and ignition method thereof, by concentric double-deck note
The layered gas-injection instrument connected below trachea group, makes the gas injection of neighbouring two oil reservoirs realize separating, respectively
After igniting, two oil reservoirs realize independent gas injection；Layered gas-injection instrument arranges sliding plug, passes through sliding plug
Diverse location realize the switching of gas path, simple in construction, easy to operate, effectively reduce cost, improve fire
Drive effect.
Accompanying drawing explanation
The following drawings is only intended to, in schematically illustrating the present invention and explaining, not delimit the scope of the invention.
Wherein:
Fig. 1 a: for the structural representation of the layering igniting process tubular column of the present invention.
Fig. 1 b: for the A-A sectional view in Fig. 1 a.
Fig. 2: the view of layered gas injection tool of lighting a fire at bottom oil layer for the present invention.
Fig. 3: for the present invention in the view of top oil layer ignition layered gas injection tool.
Fig. 4: for present invention view of layered gas-injection instrument after having lighted a fire.
In figure:
100, layering igniting process tubular column；
1, Double layered air pipe group；
11, inner tube；
12, outer tube；
13, lower floor's gas injection annular space；
2, electric igniter；
31, the first packer；
32, the second packer；
4, layered gas-injection instrument；
40, main body；
401, through hole；
402, fixing plug；
403, link slot；
41, inner tube gas injection passage；
411, the first gas outlet；
412, the second gas outlet；
413, shear pin；
42, outer tube gas injection passage；
43, sliding plug；
431, air passing hole；
5, lower end tubing string；
6, transitional connection pipe；
61, Taper Pipe section；
7, wellhead assembly；
71, inner tube air injection pipe；
72, outer tube air injection pipe；
8, sleeve pipe；
81, sieve aperture；
91, top oil reservoir；
92, bottom oil layer.
Detailed description of the invention
In order to the technical characteristic of the present invention, purpose and effect are more clearly understood from, now comparison accompanying drawing explanation
The detailed description of the invention of the present invention.
As shown in Figure 1 a, 1 b, the layering igniting process tubular column 100 that the present invention provides, it is arranged on and there is top
In the sleeve pipe 8 of the oil well of oil reservoir 91 and bottom oil layer 92, sleeve pipe 8 is provided with and top oil reservoir 91 and bottom oil
The sieve aperture 81 of layer 92 connection, layering igniting process tubular column 100 includes the double-deck note that top connects with wellhead assembly 7
Trachea group 1, Double layered air pipe group 1 includes inner tube 11 and the outer tube 12 being arranged concentrically, inner tube 11 and outer tube 12
Between form lower floor gas injection annular space 13, inner tube arranges electric igniter 2, from upper on layering igniting process tubular column 100
Packing top oil reservoir 91 and well head, top oil reservoir 91 and the first packer of bottom oil layer 92 it is arranged with under and
31 and second packer 32.The bottom of Double layered air pipe group 1 and to be positioned at the position of top oil reservoir 91 fixing even
Being connected to layered gas-injection instrument 4, the bottom of layered gas-injection instrument 4 connects to have and extends to passing through up and down of bottom oil layer 92
Logical lower end tubing string 5；Layered gas-injection instrument 4 is provided with the interior of that top connects with inner tube 11, bottom lock
Pipe gas injection passage 41, is additionally provided with in layered gas-injection instrument 4 and can connect lower floor's gas injection annular space 13 and lower end tubing string
The outer tube gas injection passage 42 of the inner chamber of 5, on the sidewall of inner tube gas injection passage 41, through being provided with can connect outer tube
First gas outlet 411 of gas injection passage 42, on the sidewall of inner tube gas injection passage 41, the most through being provided with can connect
Second gas outlet 412 of top oil reservoir 91, can be provided with change inner tube note slidably in inner tube gas injection passage 41
The sliding plug 43 of gas flow direction in gas passage 41.The layering igniting process tubular column 100 of the present invention is by same
The layered gas-injection instrument 4 connected below the Double layered air pipe group 1 of the heart, the gas injection making neighbouring two oil reservoirs is real
Now separating, after igniting respectively, two oil reservoirs realize independent gas injection；Layered gas-injection instrument 4 arranges cunning
Dynamic plug 43, realizes the switching of gas path by the diverse location of sliding plug, and simple in construction is easy to operate, has
Effect reduces cost, improves fireflood effect.
Further, as shown in Fig. 1 a, Fig. 1 b, Fig. 2, Fig. 3, layered gas-injection instrument 4 includes a main body 40,
The center of main body 40 arranges inner tube gas injection passage 41, in main body 40, is positioned at the one of inner tube gas injection passage 41
Side arranges outer tube gas injection passage 42, the sidewall that inner tube gas injection passage 41 is adjacent with outer tube gas injection passage 42 abreast
Bottom arranges the first gas outlet 411, and the sidewall of the opposite side of inner tube gas injection passage 41 is provided above the second gas outlet
412, the center of sliding plug 43 is provided with the air passing hole 431 of up/down perforation；Sliding plug 43 is positioned at inner tube gas injection
During the top of passage 41, the second gas outlet 412 is closed, the inner chamber of inner tube 11, air passing hole 431, inner tube gas injection
It is logical that passage the 41, first gas outlet 411, outer tube gas injection passage 42 and lower end tubing string 5 constitute bottom oil layer igniting
Road；When sliding plug 43 is positioned at the lower section of inner tube gas injection passage 41, the first gas outlet 411 is closed, the second gas outlet
412 open, and the inner chamber of inner tube 11, inner tube gas injection passage the 41, second gas outlet 412 constitute top oil reservoir point
Fire passage.
Further, as shown in Fig. 1 a, Fig. 2, Fig. 3, the center of main body 40 arranges the through hole of up/down perforation
401, the bottom of through hole 401 is fixedly connected with the fixing plug 402 sealed bottom through hole 401, fixing plug 402
Top formed inner tube gas injection passage 41.Inner tube gas injection passage 41 can also be by adding in the center of main body 40
The open-topped axial blind hole of work is constituted.
Further, as shown in Figure 1 a, 1 b, the top side wall of inner tube gas injection passage 41 is tightly connected inner tube
Bottom the outer wall of 11, the top down of main body 40 is provided with link slot 403, and the sidewall of link slot 403 is with outer
The outer wall sealed bottom of pipe 12 connects, and lower floor's gas injection annular space 13 seals and conducts with outer tube gas injection passage 42.Inner tube
Bottom the outer wall of 11, the top side wall with inner tube gas injection passage 41 is tightly connected, and the inner chamber of inner tube 11 is noted with inner tube
The internal connection of gas passage 41, avoids the lower floor's gas injection annular space 13 between outer tube 12 and inner tube 11 with interior simultaneously
Pipe gas injection passage 41 connects so that bottom oil layer ignition channel, top oil layer ignition passage can mutually isolated solely
Vertical.
Further, as in figure 2 it is shown, the side wall upper part of inner tube gas injection passage 41 is provided with shear pin 413, sliding
The outer wall energy of dynamic plug 43 is connected on shear pin 413.Layering igniting process tubular column 100 is arranged on sleeve pipe 8
In, when lighting a fire, sliding plug 43 is fixed on the top of inner tube gas injection passage 41 by shear pin 413,
Close the second gas outlet 412；After bottom oil layer 92 igniting, electric igniter 2 is used to push down on sliding plug
43, shear pin 413 is cut off, and sliding plug 43 slides and drops to the bottom of inner tube gas injection passage 41, closes
First gas outlet 411.
Further, as shown in Fig. 1 a, Fig. 2, Fig. 3, the bottom of layered gas-injection instrument 4 connects has transition to connect
Pipe 6, the bottom of transitional connection pipe 6 is fixing connects lower end tubing string 5.
In the present embodiment, transitional connection pipe 6 is positioned at the lower section of layered gas-injection instrument 4 be provided with diameter to
Under tapered Taper Pipe section 61.Taper Pipe section 61 can make to be flowed into the gas of lower end tubing string 5 by outer tube gas injection passage 42
Body is assembled to axial centre, is conducive to promoting the gas injection uniformity of bottom oil layer 92.
Further, as shown in Figure 1a, wellhead assembly 7 is provided with the inner tube air injection pipe 71 connected with inner tube 11,
The outer tube air injection pipe 72 connected with lower floor gas injection annular space 13 it is additionally provided with on wellhead assembly 7.By at well head
Adjust inner tube air injection pipe 71, outer tube air injection pipe 72, it is possible to realize layering and adjust the note of the oil reservoir communicated therewith
Tolerance, simple to operate, precise control.
Further, as shown in Figure 1a, the outer wall of outer tube 12 is positioned at the position above top oil reservoir 91 sheathed
One packer 31, sheathed second envelope in the lower end tubing string 5 position between top oil reservoir 91 and bottom oil layer 92
Every device 32.
The method using the layering igniting process tubular column of the present invention to carry out layering igniting, comprises the steps:
Layering igniting process tubular column 100 is installed in the sleeve pipe 8 of oil well, inner tube 11 top and wellhead assembly 7
The inner tube air injection pipe 71 of upper setting connects, lower floor's gas injection annular space 13 top and the outer tube note of setting on wellhead assembly
Trachea 72 connects, as in figure 2 it is shown, sliding plug 43 is fixed on the top of inner tube gas injection passage 41, second goes out
QI KOU 412 is closed by sliding plug 43, in one embodiment, sets above the sidewall of inner tube gas injection passage 41
Putting shear pin 413, the outer wall of sliding plug 43 is connected on shear pin 413 fixing；
First bottom oil layer 92 is lighted a fire: close outer tube air injection pipe 72, open inner tube air injection pipe 71, to
Gas injection in inner tube 11, starts electric igniter 2 and heats injecting gas, as in figure 2 it is shown, the gas warp of heating
On sliding plug 43, the air passing hole 431 of setting, inner tube gas injection passage the 41, first gas outlet 411, outer tube gas injection are led to
Road 42, lower end tubing string 5, sieve aperture 81 flow into bottom oil layer 92, light a fire bottom oil layer 92；
After bottom oil layer 92 igniting, continuing gas injection in inner tube 11, gas continues into bottom oil layer 92,
Supply bottom oil layer 92 combustion needs；
Afterwards, top oil reservoir 91 is lighted a fire: well head uses infusion appliance (prior art, figure not shown in)
Electric igniter 2 lower end is made to push down on sliding plug 43, as it is shown on figure 3, in sliding plug 43 slide downward is fallen
Bottom pipe gas injection passage 41, in one embodiment, electric igniter 2 is used to push down on sliding plug 43,
Shear pin 413 is cut off, and sliding plug 43 slides and drops to the bottom of inner tube gas injection passage 41, sliding plug 43
Close the first gas outlet 411, inner tube gas injection passage 41 and outer tube gas injection passage 42 to separate, open outer tube gas injection
Pipe 72 by lower floor's gas injection annular space 13, outer tube gas injection passage 42, lower end tubing string 5 to bottom oil layer 92 gas injection,
Supply bottom oil layer 92 combustion needs；Second gas outlet 412 is opened, and in inner tube 11, gas is through electric igniter 2
Top oil reservoir 91 is flowed into through inner tube gas injection passage the 41, second gas outlet 412, sieve aperture 81 after heating, right
Top oil reservoir 91 is lighted a fire；
After igniting, as shown in Figure 4, inner tube air injection pipe 71 and outer tube air injection pipe 72 are respectively to top oil reservoir
91 and bottom oil layer 92 gas injection, adjust inner tube air injection pipe 71 and the gas injection rate of outer tube air injection pipe 72, it is achieved on
The hierarchical control of the gas injection rate of portion's oil reservoir 91 and bottom oil layer 92.
From the above mentioned, the layering igniting process tubular column of present invention offer and ignition method thereof, by concentric double-deck note
The layered gas-injection instrument connected below trachea group, makes the gas injection of neighbouring two oil reservoirs realize separating, respectively
After igniting, two oil reservoirs realize independent gas injection；Layered gas-injection instrument arranges sliding plug, passes through sliding plug
Diverse location realize the switching of gas path, simple in construction, easy to operate, effectively reduce cost, improve fire
Drive effect.
The foregoing is only the schematic detailed description of the invention of the present invention, be not limited to the scope of the present invention.
Any those skilled in the art, equivalent done on the premise of without departing from the design of the present invention and principle becomes
Change and amendment, the scope of protection of the invention all should be belonged to.
Claims (13)
1. layering an igniting process tubular column, described layering igniting process tubular column be arranged on have top oil reservoir and under
In the sleeve pipe of the oil well of portion's oil reservoir, sleeve pipe is provided with the sieve aperture connected with top oil reservoir and bottom oil layer, described point
Layer igniting process tubular column includes the Double layered air pipe group that top connects, described Double layered air pipe group bag with wellhead assembly
Include the inner and outer tubes being arranged concentrically, form lower floor's gas injection annular space between said inner tube and described outer tube, in said inner tube
Electric igniter is set, described layering igniting process tubular column is arranged with from top to bottom packing top oil reservoir and well head,
First packer of top oil reservoir and bottom oil layer and the second packer；It is characterized in that:
The bottom of described Double layered air pipe group and be positioned at the position of top oil reservoir and be fixedly connected with layered gas-injection work
Tool, the bottom of described layered gas-injection instrument connects the lower end tubing string having the up/down perforation extending to bottom oil layer；Institute
State and layered gas-injection instrument is provided with inner tube gas injection passage that top connects with said inner tube, bottom lock, institute
State and layered gas-injection instrument is additionally provided with the inner chamber that can connect described lower floor gas injection annular space and described lower end tubing string
Outer tube gas injection passage, on the sidewall of said inner tube gas injection passage, through being provided with can connect described outer tube gas injection passage
The first gas outlet, on the sidewall of said inner tube gas injection passage, the most through being provided with can connect the second of top oil reservoir
Gas outlet, can be provided with gas flowing in change said inner tube gas injection passage slidably in said inner tube gas injection passage
The sliding plug in direction.
It is layered igniting process tubular column the most as claimed in claim 1, it is characterised in that: described layered gas-injection work
Tool includes that a main body, the center of described main body arrange said inner tube gas injection passage, in described main body, is positioned at institute
The side stating inner tube gas injection passage arranges described outer tube gas injection passage, and said inner tube gas injection passage is noted with described outer tube
The sidewall bottom that gas passage is adjacent arranges described first gas outlet, the sidewall of the opposite side of said inner tube gas injection passage
Being provided above described second gas outlet, the center of described sliding plug is provided with the air passing hole of up/down perforation；Described
Described in when sliding plug is positioned at the top of said inner tube gas injection passage, the second gas outlet is closed, the inner chamber of said inner tube,
Described air passing hole, said inner tube gas injection passage, described first gas outlet, described outer tube gas injection passage and described under
End tubing string, described sieve aperture constitute bottom oil layer ignition channel；Described sliding plug is positioned at said inner tube gas injection passage
Described in during lower section, the first gas outlet is closed, and the inner chamber of said inner tube, said inner tube gas injection passage, described second goes out
QI KOU, described sieve aperture constitute top oil layer ignition passage.
It is layered igniting process tubular column the most as claimed in claim 2, it is characterised in that: the center of described main body
Place arranges the through hole of up/down perforation, and the bottom of described through hole is fixedly connected with and seals the fixing of described via bottoms
Plug, the top of described fixing plug forms said inner tube gas injection passage.
It is layered igniting process tubular column the most as claimed in claim 3, it is characterised in that: said inner tube gas injection is led to
The top side wall in road is tightly connected bottom the outer wall of said inner tube, and the top down of described main body is provided with connection
Groove, the sidewall of described link slot is connected with the outer wall sealed bottom of described outer tube, described lower floor gas injection annular space and institute
State the conducting of outer tube gas injection channel seal.
It is layered igniting process tubular column the most as claimed in claim 2, it is characterised in that: said inner tube gas injection is led to
The side wall upper part in road is provided with shear pin, and the outer wall energy of described sliding plug is connected on described shear pin.
It is layered igniting process tubular column the most as claimed in claim 1, it is characterised in that: described layered gas-injection work
The bottom of tool connects transitional connection pipe, and the bottom of described transitional connection pipe is fixing connects described lower end tubing string.
It is layered igniting process tubular column the most as claimed in claim 6, it is characterised in that: described transitional connection pipe
On be positioned at the lower section of described layered gas-injection instrument and be provided with the Taper Pipe section that diameter is the most tapered.
It is layered igniting process tubular column the most as claimed in claim 1, it is characterised in that: on described wellhead assembly
It is provided with the inner tube air injection pipe connected with said inner tube, described wellhead assembly is additionally provided with and the gas injection of described lower floor
The outer tube air injection pipe of annular space connection.
It is layered igniting process tubular column the most as claimed in claim 1, it is characterised in that: the outer wall of described outer tube
Being positioned at sheathed described first packer in the position above the oil reservoir of top, described lower end tubing string is positioned at described top oil reservoir
And sheathed described second packer in position between described bottom oil layer.
10. one kind utilizes layering igniting process tubular column described in any one of claim 1 to 9 to carry out layering igniting
Method, comprises the following steps:
Step one: layering igniting process tubular column is installed in the sleeve pipe of oil well；
Step 2: light a fire bottom oil layer: gas injection in inner tube, starts electric igniter and adds injecting gas
Heat, air passing hole that the gas of heating is arranged on sliding plug, inner tube gas injection passage, the first gas outlet, outer tube note
Gas passage, lower end tubing string, sieve aperture flow into bottom oil layer, light a fire bottom oil layer；
After bottom oil layer igniting, continuing gas injection in inner tube, gas continues into bottom oil layer, under supply
Portion's oil reservoir combustion needs；
Step 3: top oil reservoir is lighted a fire: well head uses infusion appliance to make electric igniter lower end push down on cunning
Moving plug, sliding plug slide downward falls inner tube gas injection channel bottom, and sliding plug closes the first gas outlet, and inner tube is noted
Gas passage and outer tube gas injection channel separation, to lower floor's gas injection annular air injection, gas is by lower floor's gas injection annular space, outer
Pipe gas injection passage, lower end tubing string flow into bottom oil layer, supply bottom oil layer combustion needs；Second gas outlet
Open, in inner tube gas after electric igniter heats through inner tube gas injection passage, the second gas outlet, sieve aperture flow into
Enter top oil reservoir, to top oil layer ignition；
After igniting, from well head respectively to top oil reservoir and bottom oil layer gas injection, it is achieved top oil reservoir and bottom
The hierarchical control of the gas injection rate of oil reservoir.
11. methods that layering is lighted a fire as claimed in claim 10, it is characterised in that: in step one, interior
Pipe top connects with the inner tube air injection pipe arranged on wellhead assembly, and lower floor's gas injection annular space top sets on wellhead assembly
The outer tube air injection pipe connection put, sliding plug is fixed on the top of inner tube gas injection passage, to close the second gas outlet.
12. methods that layering is lighted a fire as claimed in claim 11, it is characterised in that: in step 2, close
Close outer tube air injection pipe, open inner tube air injection pipe, by the gas injection in inner tube of inner tube air injection pipe.
13. methods that layering is lighted a fire as claimed in claim 11, it is characterised in that: in step 3, by
Inner tube air injection pipe and outer tube air injection pipe, respectively to top oil reservoir and bottom oil layer gas injection, adjust inner tube air injection pipe with outer
The gas injection rate of pipe air injection pipe, it is achieved the hierarchical control of the gas injection rate of top oil reservoir and bottom oil layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610486246.3A CN105937386A (en) | 2016-06-28 | 2016-06-28 | Layered ignition process pipe column and layered ignition method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610486246.3A CN105937386A (en) | 2016-06-28 | 2016-06-28 | Layered ignition process pipe column and layered ignition method thereof |
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| CN105937386A true CN105937386A (en) | 2016-09-14 |
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| CN201610486246.3A Pending CN105937386A (en) | 2016-06-28 | 2016-06-28 | Layered ignition process pipe column and layered ignition method thereof |
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| CN107401399A (en) * | 2017-08-29 | 2017-11-28 | 中国石油天然气股份有限公司 | Adjustable steam injection pipe column |
| CN109057764A (en) * | 2018-08-29 | 2018-12-21 | 中国石油天然气股份有限公司 | Layered fireflood pipe column and ignition method thereof |
| CN111927416A (en) * | 2019-05-13 | 2020-11-13 | 中国石油天然气股份有限公司 | Layered ignition gas injection oil jacket system |
| CN113756773A (en) * | 2020-06-03 | 2021-12-07 | 中国石油天然气股份有限公司 | Layered ignition process pipe column with lower layer being ignited first and upper layer being ignited second and layered ignition method |
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