CN104453808B - Underground separate injection method and separate injection pipe column - Google Patents
Underground separate injection method and separate injection pipe column Download PDFInfo
- Publication number
- CN104453808B CN104453808B CN201410634711.4A CN201410634711A CN104453808B CN 104453808 B CN104453808 B CN 104453808B CN 201410634711 A CN201410634711 A CN 201410634711A CN 104453808 B CN104453808 B CN 104453808B
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- injection well
- well downhole
- water
- flow regulator
- flow passage
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/20—Displacing by water
Abstract
The invention discloses an underground separate injection method and a separate injection pipe column. All water distributors in the separate injection pipe column are concentrated in a top oil layer and the lower water distributor used for injecting water into a lower oil layer injects water into the lower oil layer through a flow division device, so that in the water injection process, the separate injection pipe column is suitable for different water injection layer depths through the extending length of the flow division device, and the multilayer separate injection effect is achieved. Meanwhile, the landing depth of each water distributor can be effectively controlled, the separate injection effect can be achieved through the small landing slope of each water distributor or by reaching the vertical top oil layer, the problems that cores of the water distributors are not in place and a well testing steel wire is broken in a large-slope well landing and pulling test are effectively solved, and the success rate of the landing and pulling test is greatly increased; due to the fact that the landing positions of the water distributors are closer to a well head, landing time of a landing and pulling tester is shortened, and landing and pulling test efficiency is greatly improved.
Description
Technical field
The present invention relates to a kind of oil extraction in oil field technical field, more particularly to a kind of down-hole dispensing method and separate injection tubing string.
Background technology
At present, being continuously increased with directional well in oilfield exploitation and inclined shaft, and directional well and inclined shaft hole deviation is big, note
Under the influence of the factors such as water pressure height, become increasingly conspicuous the problems such as the layered seal and dropping-fishing test that cause inclined shaft high pressure dispensing,
Down-hole is difficult to realize precisely subdivided water filling.Conventional zonal injection technology technology is suitable for well of the hole deviation below 30 °, within well depth 2000m,
Dropping-fishing test success rate 90% or so；When hole deviation degree more than 30 °, less than 45 °, well within well depth 2000m when, dropping-fishing test
Success rate 50% or so；When gradient is more than 45 °, the dropping-fishing test of conventional zonal injection technology will be unable to implement, during dropping-fishing test,
Affected by frictional force, will be frequently occurred the problems such as the fuse pulling of injection well downhole flow regulator is not in place, piano wire is broken often.
Chinese patent literature 201220398962.3 discloses a kind of efficient separate injection tubing string of high angle hole, the tubing string from lower and
On bottom stifled, screen casing, fill cycle valve, two grades of integrated concentric roater regulators, two grades of righting type packers, one-levels are sequentially connected by oil pipe
Integrated concentric roater regulator and set protect packer.But the integrated concentric roater regulator of the efficient separate injection tubing string of the high angle hole is needed according to note
The depth of water layer position and select depth of setting, when water filling layer position be located at hole deviation larger part when, measurement and adjustment instrument device docking yet suffer from compared with
Big difficulty.And deployment operations complex process is entered using cable, during constantly rubbing with the borehole wall, also easily there is dielectric strength
The failures such as reduction, short circuit, cause the problem that tester cannot rise out, make dispensing fail, if tester is stuck in tubing string,
In lift pipe string, cable one need to successively be pounded disconnected, labor intensive material resources.Therefore there is in actual use very big wind in the tubing string
Danger, without the technical barrier for fundamentally solving high angle hole dispensing.
The content of the invention
It is an object of the invention to provide a kind of down-hole dispensing method of easy dropping-fishing test, while additionally providing a kind of special
In the down-hole separate injection tubing string for implementing the dispensing method.
In order to realize object above, the technical scheme of down-hole dispensing method is as follows in the present invention：
Down-hole dispensing method, comprises the following steps：
Step one, separate injection tubing string is thrown in into oil well casing, and the separate injection tubing string includes the top being sequentially connected in series from the top down
Portion's injection well downhole flow regulator, bottom injection well downhole flow regulator and part flow arrangement, are connected with packer on the periphery of part flow arrangement, packer is divided into oil well
In the top oil reservoir and the bottom oil layer below the oil reservoir of top of top layer, there is top between top oil reservoir and top injection well downhole flow regulator
Water flow passage is matched somebody with somebody in portion, and there is the bottom in part flow arrangement to match somebody with somebody water flow passage, top water distribution between bottom oil layer and bottom injection well downhole flow regulator
Runner and bottom are mutually arranged parallel with water flow passage, and the normally closed type that builds the pressure below packer is connected with part flow arrangement
Communicating valve；
Step 2, closes top and matches somebody with somebody water flow passage, and pressure is injected in separate injection tubing string by oil pipe and open less than communicating valve
The hydraulic medium of pressure, hydraulic medium is acted on packer and realizes that packer is acted on；
Step 3, improves the pressure of hydraulic medium so that the pressure of hydraulic medium is more than the Opening pressure of communicating valve, and beats
Open all with water flow passage, by oil pipe to water filling in separate injection tubing string, then matched somebody with somebody with water flow passage and bottom by top in separate injection tubing string
Water flow passage is by current dispensing to top oil reservoir and bottom oil layer.
Packer has two and is respectively defined as upper and lower packer, and bottom oil layer is divided into middle part oil reservoir by lower packet
And bottom oil layer, bottom injection well downhole flow regulator have two and be respectively the middle part injection well downhole flow regulator for communicating corresponding with middle part oil reservoir and and bottom oil layer
The bottom injection well downhole flow regulator that correspondence is communicated, bottom has middle part corresponding with middle part oil reservoir with water flow passage and and bottom oil layer with water flow passage
Water flow passage is matched somebody with somebody in corresponding bottom, and lower end of the middle part with water flow passage extends to the lower section of lower packet and by ductus arteriosus occluder, middle part
With water flow passage in periphery of the bottom with water flow passage, communicating valve be connected to middle part with water flow passage between upper and lower packer
At position, and in step 2, bottom is also blocked with water flow passage.
Top injection well downhole flow regulator and middle part injection well downhole flow regulator pass through respectively the water-distributing gap opened up on periphery and corresponding water distribution flow passage,
Bottom injection well downhole flow regulator is by bottom port and bottom water distribution flow passage.
Top oil reservoir is the straight well section for vertically extending up and down, and bottom oil layer is the lower curved section being obliquely installed in above-below direction.
The technical scheme of down-hole separate injection tubing string is as follows in the present invention：
Separate injection tubing string, including the top injection well downhole flow regulator, bottom injection well downhole flow regulator and part flow arrangement that are sequentially connected in series from the top down, shunting dress
It is connected with the periphery put for oil well to be divided into the top oil reservoir in top layer and the bottom oil below the oil reservoir of top
Layer packer, be provided with part flow arrangement for connect bottom oil layer and bottom injection well downhole flow regulator and with top injection well downhole flow regulator and top oil
Water flow passage is matched somebody with somebody in top between layer with the parallel arrangement of bottom of water flow passage, be connected with below packer on part flow arrangement for
The communicating valve of the normally closed type that builds the pressure opened when bottom is more than the pressure of packer setting with the pressure in water flow passage.
Packer has two and is respectively used for every the upper packer being located between top oil reservoir and bottom oil layer and is used for
Bottom oil layer is divided into into the lower packet of middle part oil reservoir and bottom oil layer, bottom injection well downhole flow regulator there are two and is respectively used in
The middle part injection well downhole flow regulator of portion's oil-bearing stratum flooding and for the bottom injection well downhole flow regulator of bottom oil layer water filling, bottom injection well downhole flow regulator is serially connected in middle part and matches somebody with somebody
The lower section of hydrophone, the bottom has middle part corresponding with middle part oil reservoir with water flow passage and corresponding with bottom oil layer with water flow passage
Match somebody with somebody water flow passage in bottom.
Middle part injection well downhole flow regulator passes through the water-distributing gap opened up on periphery and middle part water distribution flow passage, and bottom injection well downhole flow regulator passes through bottom
Port and bottom water distribution flow passage.
Part flow arrangement includes the tapping sleeve being sleeved on the periphery of bottom injection well downhole flow regulator, during the upper end of tapping sleeve extends to
On portion's injection well downhole flow regulator water-distributing gap top and be sealedly connected on middle part injection well downhole flow regulator periphery on, the lower end of tapping sleeve is connected with string
The tap being connected on below the injection well downhole flow regulator of bottom, every being provided with the bottom that connects with the bottom port of bottom injection well downhole flow regulator on tap
Tap hole and the middle part tap hole connected with the bottom mouth of pipe of tapping sleeve, the lower end in bottom tapping hole is connected with for extending to
Bottom tapping pipe in bottom oil layer, the tube chamber with water flow passage by bottom tapping pipe connected on the bottom injection well downhole flow regulator and bottom
Tap hole is formed, on the middle part injection well downhole flow regulator connect with water flow passage by middle part tap hole and the segment dislocation of tapping sleeve.
The lower end of middle part tap hole is connected with the sealing sleeve pipe being sleeved on the periphery of bottom tapping pipe, and sealing sleeve pipe extends
To the bottom of bottom tapping pipe, and have between sealing sleeve pipe and bottom tapping pipe for extending to bottom oil from top oil reservoir
The shunting gap of layer, shunts the annular plugging device being equipped with gap for sealing up the bottom opening in shunting gap.
Communicating valve is assemblied on the periphery of sealing sleeve pipe at the position between upper and lower packer.
The present invention concentrates on all injection well downhole flow regulators in separate injection tubing string in the oil reservoir of top, and matches somebody with somebody to the bottom of bottom oil-bearing stratum flooding
Hydrophone will realize the water filling in bottom oil layer by part flow arrangement, and separate injection tubing string will be by part flow arrangement in such the injecting process
Development length adapting to different injection layer depth, the effect of depositing is realized, while entering depth under effective control injection well downhole flow regulator
Degree so that injection well downhole flow regulator enters the effect that dispensing is can be achieved with after the less or vertical top oil reservoir of gradient under, is effectively prevented
Occur the problem that water distributor core is not in place, piano wire is broken in high angle hole dropping-fishing test, substantially increase pulling survey
The success rate of examination, and well head is located closer to due to entering under injection well downhole flow regulator, shorten the lower angle of incidence of dropping-fishing test instrument, institute
To substantially increase dropping-fishing test efficiency.
Description of the drawings
Fig. 1 is the embodiment structural representation in a state of use of the separate injection tubing string of the present invention；
Fig. 2 is the structural representation of middle part injection well downhole flow regulator in Fig. 1；
Fig. 3 is the structural representation of bottom injection well downhole flow regulator in Fig. 1；
Fig. 4 is the A-A of righting joint in Fig. 3 to sectional view；
Fig. 5 is the structural representation of flow dividing structure in Fig. 1；
Fig. 6 is the B-B direction sectional view of Fig. 5.
Specific embodiment
The embodiment of the separate injection tubing string of the present invention：As shown in Figures 1 to 6, the separate injection tubing string is a kind of three layers of high angle hole
Separate injection tubing string, is made up of outer tube assembly and interior tube assembly.Outer tube assembly includes that oil pipe 2, top connected successively from top to bottom is matched somebody with somebody
Hydrophone 1, the tapping sleeve 5-2 of part flow arrangement 4, the bridge-type sleeve of the tap of part flow arrangement 4, hydraulic anchor 6, upper packer 7,
Communicating valve 8, lower packet 10, plugging device 12, screen casing 13, plug 14.During interior tube assembly includes coaxially being serially connected in by connecting tube
The shunting of the sealed fitting 14-3 lower ends that the bottom injection well downhole flow regulator 5, sleeve of the lower section of portion's injection well downhole flow regulator 3 is assemblied in bottom injection well downhole flow regulator 5 connects
The upper tap 1-1 of head, the bottom tapping pipe 9 being threaded on the lower tap 3-1 of tap, bottom tapping pipe
9 lower end is inserted in the endoporus of plugging device 12.
Top injection well downhole flow regulator 1 is conventional centering type injection well downhole flow regulator, belongs to prior art.Middle part injection well downhole flow regulator 3 is a kind of minor diameter
Centering type injection well downhole flow regulator, including on setting gradually from top to bottom with water swivel 1-2, guide way 2-2, middle part water distribution main body 3-2, under
With water swivel 4-2, the middle part paring chamber and the plunger installation cavity for being offset to middle part paring chamber of up/down perforation are provided with water distribution main body,
The middle part water-distributing gap through water distribution main body periphery is offered in the cavity wall of plunger installation cavity.Bottom injection well downhole flow regulator 5 includes fishing rod 1-
3rd, righting joint 2-3, pressure cap 3-3, spring 4-3, bottom water distribution main body 5-3, torsion spring 6-3, cam 7-3, rotating shaft 8-3, outside stop
Pipe 9-3, water nozzle baffle ring 10-3, water nozzle 11-3, seal head 12-3, spacing outer tube 13-3 and sealed fitting 14-3, righting joint
The inwall of 2-3 is provided with four in circumferentially-spaced uniform guiding rib, with pressure cap 3-3, spring 4-3, bottom water distribution main body 5-
3rd, the cock blanking plug edge that torsion spring 6-3, cam 7-3, rotating shaft 8-3, water nozzle baffle ring 10-3, water nozzle 11-3, seal head 12-3 are formed
Above-below direction guiding movement coordinates.
Part flow arrangement 4 is mainly made up of tapping sleeve 5-2, tap and bottom tapping pipe 9.Tapping sleeve 5-2 is by counting
The individual casing section being sequentially connected in series from top to bottom by diversion pipe joint 6-2 is constituted, and tapping sleeve 5-2 is sleeved on bottom injection well downhole flow regulator 5
Stop outer tube 9-3 periphery, between the internal face of tapping sleeve 5-2 and the outer peripheral face of stop outer tube 9-3 have shunting gap；
The threaded upper ends of tapping sleeve 5-2 be connected to middle part injection well downhole flow regulator 3 on the bottom with water swivel 1-2, and tapping sleeve 5-2's is upper
End and middle part injection well downhole flow regulator 3 on surface seal structure last week being provided between water swivel 1-2 between the water-distributing gap of middle part, middle part
Also there is shunting gap between the outer peripheral face of middle part water distribution main body 3-2 of injection well downhole flow regulator 3 and the internal face of tapping sleeve 5-2 upper ends；
The lower end of tapping sleeve 5-2 is threaded on tap, and lower side face is provided between tapping sleeve 5-2 and tap
Sealing structure.Tap is made up of bridge-type sleeve pipe 2-1, upper tap 1-1 and lower tap 3-1, upper tap 1-1
Lower end be threaded in bridge-type sleeve pipe 2-1, the threaded upper ends of lower tap 3-1 are connected under tap 1-1
In end, and the bridge-type through hole 4-1 for extending up and down is offered in the tube wall of bridge-type sleeve pipe 2-1, bridge-type through hole 4-1 have eight and
Bridge-type sleeve it is circumferentially-spaced uniform, the upper end outer peripheral face of the upper tap 1-1 of upper aperture connection of each bridge-type through hole 4-1 and point
Shunting gap, the lower end inner wall face of lower aperture connection bridge-type sleeve and lower shunting between the lower end inner wall face of stream sleeve pipe 5-2 connects
Shunting gap between the outer peripheral face of head 3-1, and be connected with the lower end periphery of bridge-type sleeve pipe 2-1 and be sleeved on lower tap
The sealing sleeve pipe 11 of 3-1 peripheries, sealing sleeve pipe 11 is connected in hydraulic anchor 6, upper packer 7, communicating valve 8 and lower envelope by several concatenations
The pipeline section of oil pipe 2 on device 10 is constituted；The lower end of lower tap 3-1 is stretched out from the lower end of bridge-type sleeve pipe 2-1, extension
Ends screw is connected in the upper end of bottom tapping pipe 9, to be formed between sealing sleeve pipe 11 and bottom tapping pipe 9 from top oil
Layer 15 extends to the shunting gap of bottom oil layer 17, and the lower end in the shunting gap is assembled in tapping sleeve 5-2 and bottom point
Annular plugging device 12 between flow tube 9 is blocked, so that during the liquid medium in shunting gap can only be flow to by communicating valve 8
Portion's oil reservoir 16.
Oil well is divided into top oil reservoir 15, the middle part oil being sequentially arranged from top to bottom for upper packer 7 and lower packet 10
Layer 16 and bottom oil layer 17.The top water distribution that opens up on the inner chamber of oil well casing and the periphery of top injection well downhole flow regulator 1 in the oil reservoir 15 of top
Runner between mouthful is formed matches somebody with somebody water flow passage for current from the top that top injection well downhole flow regulator 1 is injected in the oil reservoir 15 of top.From middle part water distribution
Middle part water-distributing gap on device 3 starts, leads to the shunting gap in the passage summation between communicating valve 8, i.e. part flow arrangement 4 and bridge-type
Hole 4-1 is defined and is matched somebody with somebody water flow passage to the middle part that middle part oil reservoir 16 supplies water for middle part injection well downhole flow regulator 3, and bridge-type through hole 4-1 matches somebody with somebody at middle part
The middle part tap hole connected with the bottom mouth of pipe of tapping sleeve 5-2 is defined in water flow passage.The endoporus of bottom tapping pipe 9 and shunting
The endoporus of joint is defined matches somebody with somebody water flow passage for bottom injection well downhole flow regulator 5 to the bottom of water filling in bottom oil layer 17, and tap is upper
The endoporus of tap 1-1 and lower tap 3-1 defines the bottom end with bottom injection well downhole flow regulator 5 in water flow passage is matched somebody with somebody in the bottom
The bottom tapping hole of mouth connection, the spaced setting in tap of bottom tapping hole and middle part tap hole.
Oil pipe 2, tapping sleeve 5-2 and sealing sleeve pipe 11 are the larger large scale oil pipe 2 of caliber, and connecting tube and bottom
Isocon 9 is the less small size oil pipe 2 of caliber.Upper packer 7 and lower packet 10 are high angle hole water injection packer.
Communicating valve 8 is the normally close valve that builds the pressure opened when the pressure of the internal hydraulic pressure of sealing sleeve pipe 11 is more than the pressure of packer setting.
Plugging device 12 is the annular intubation sealer that inner tube is tightly connected with bottom tapping pipe 9.
High angle hole water injection packer is big orifice packer, and small size oil pipe 2 can pass through high angle hole water injection packer
Inside, and leave enough water filling spaces.There is difference in areas in the backwash valve two ends of high angle hole water injection packer, in fluid column deadweight
Under just can effectively close, it is ensured that the sealing property of backwash valve.Simultaneously high angle hole water injection packer carries self-locking mechanism, can prevent
Packer setting failure caused by the string creep for only causing because of factors such as temperature, pressure effect and water injection pressure fluctuations, protects
The sealing reliability of packer is demonstrate,proved.Sand stop ring is housed in the lock claw position of packer, the lock claw of packer is prevented by sand card
Extremely, deblocking is led to not.
Bottom injection well downhole flow regulator 5 is connected to the middle part bottom of injection well downhole flow regulator 3, the sealed fitting 14-3 insertion shuntings of bottom injection well downhole flow regulator 5
In the upper tap 1-1 of joint, the seal section of the upper seal nipple of tap have certain length and without with shunting
The bridge-type sleeve pipe 2-1 screwed connections of joint, therefore when tubing string is assembled, it is not necessary to prepare the special pipe nipple of oil pipe 2, facilitate tubing string
Assemble.
The embodiment of down-hole dispensing method in the present invention：The down-hole dispensing method is a kind of three layers of water filling side of high angle hole
Method, comprises the following steps：
Step one, separate injection tubing string is thrown in into oil well casing, and the release sequence of separate injection tubing string is：
1. in plug 14, screen casing 13, the bottom section of sealing sleeve pipe 11, plugging device 12, lower packet 10, sealing sleeve pipe 11
The top section of section, communicating valve 8, upper packer 7, hydraulic anchor 6 and sealing sleeve pipe 11；
2. bottom tapping pipe 9, tap, the lower end of bottom tapping pipe 9 is inserted in the inner tube of plugging device 12, and shunting connects
The lower tap 3-1 of head is threaded in the upper end of bottom tapping pipe 9, the lower end screw thread of the bridge-type sleeve pipe 2-1 of tap
It is connected to the upper end of sealing sleeve pipe 11；
3. bottom injection well downhole flow regulator 5, dividing bushing, middle part injection well downhole flow regulator 3, connected pipes 2, top injection well downhole flow regulator 1, oil pipe 2, bottom is matched somebody with somebody
The sealed fitting 14-3 of hydrophone 5 is inserted in the upper tap 1-1 of tap, the righting joint 2-3 of bottom injection well downhole flow regulator 5
Lower with middle part injection well downhole flow regulator 3 is threadedly coupled with water swivel 4-2 by tapping sleeve 5-2；
Step 2, sets：Dead mouth blanking plug is put in top injection well downhole flow regulator 1 and bottom injection well downhole flow regulator 5 and current are matched somebody with somebody at top
Road and bottom block with water flow passage, throw in cock blanking plug in middle part injection well downhole flow regulator 3 and keep middle part unimpeded with water flow passage, and from
Oil pipe 2 is suppressed to upper packer 7 and lower packet 10 and obstructed, and is continued to boost to communicating valve 8 and is opened；
Step 3, water filling：Dead mouth blanking plug in top injection well downhole flow regulator 1 and bottom injection well downhole flow regulator 5 is changed to into cock blanking plug, and
The size of stopper for regulating water nozzle, it is ensured that all to open with water flow passage, to realize three-level water filling with water flow passage by following：
1. water flow passage is matched somebody with somebody at top：It is connected with top injection well downhole flow regulator 1 by the inner chamber of oil pipe 2, and by the outer of top injection well downhole flow regulator 1
The top water-distributing gap of all upper offsets, realizes passing through top to the top water-distributing gap on the water filling of top oil reservoir 15, i.e. top injection well downhole flow regulator 1
With water flow passage to water filling in top oil reservoir 15；
2. water flow passage is matched somebody with somebody at middle part：It is connected with middle part injection well downhole flow regulator 3 by the inner chamber of oil pipe 2, by the periphery of middle part injection well downhole flow regulator 3
After the middle part distributing hole of upper offset, the bridge-type through hole 4-1 in the bridge-type sleeve pipe 2-1 tube walls of tap is flowed through, into sealing shroud
Shunting gap between pipe 11 and bottom tapping pipe 9, finally by communicating valve 8, realizes to the water filling of middle part oil reservoir 16, that is, in passing through
Portion is with water flow passage to the water filling of middle part oil reservoir 16；
3. water flow passage is matched somebody with somebody in bottom：It is connected with bottom injection well downhole flow regulator 5 by the inner chamber of oil pipe 2, by blocking in bottom injection well downhole flow regulator 5
After the water nozzle 11-3 of device, the endoporus of bridge-type sleeve pipe 2-1, then the endoporus by bottom tapping pipe 9 and plugging device 12 are flowed through, and passed through
Screen casing 13 matches somebody with somebody water flow passage to water filling in bottom oil layer 17 to water filling in bottom oil layer 17 by bottom.
In the above-described embodiments, separate injection tubing string realizes three layers of dispensing, in other embodiments, dispensing by part flow arrangement
Tubing string can be used for the oil reservoir dispensing realized two-layer dispensing or realize more than three layers, especially realize two-layer point in separate injection tubing string
During note, corresponding bottom injection well downhole flow regulator can be got rid of, it is only necessary to current be guided into from middle part injection well downhole flow regulator by dividing bushing
Portion's oil reservoir 16；And when more than three layers of oil reservoir dispensing is realized, in the oil reservoir of top will be set match somebody with somebody corresponding with oil reservoir number
Hydrophone, it is corresponding by each injection well downhole flow regulator it is downward arrange parallel to realize, to different oil reservoir dispensings, being now in water flow passage
Each oil reservoir of the lower section of top oil reservoir 15 can be collectively referred to as bottom oil layer, and now the dispensing scheme of oil well will be real as follows
It is existing：
Step one, separate injection tubing string is thrown in into oil well casing, and the separate injection tubing string includes the top being sequentially connected in series from the top down
Portion's injection well downhole flow regulator, bottom injection well downhole flow regulator and part flow arrangement, are connected with packer on the periphery of part flow arrangement, packer is divided into oil well
In the top oil reservoir and the bottom oil layer below the oil reservoir of top of top layer, there is top between top oil reservoir and top injection well downhole flow regulator
Water flow passage is matched somebody with somebody in portion, and there is the bottom in part flow arrangement to match somebody with somebody water flow passage, top water distribution between bottom oil layer and bottom injection well downhole flow regulator
Runner and bottom are mutually arranged parallel with water flow passage, and the normally closed type that builds the pressure below packer is connected with part flow arrangement
Communicating valve；
Step 2, closes top and matches somebody with somebody water flow passage, and pressure is injected in separate injection tubing string by oil pipe and open less than communicating valve
The hydraulic medium of pressure, hydraulic medium is acted on packer and realizes that packer is acted on；
Step 3, improves the pressure of hydraulic medium so that the pressure of hydraulic medium is more than the Opening pressure of communicating valve, and beats
Open all with water flow passage, by oil pipe to water filling in separate injection tubing string, then matched somebody with somebody with water flow passage and bottom by top in separate injection tubing string
Water flow passage is by current dispensing to top oil reservoir and bottom oil layer.
Claims (5)
1. down-hole dispensing method, it is characterised in that comprise the following steps：
Step one, separate injection tubing string is thrown in into oil well casing, and the separate injection tubing string includes that the top being sequentially connected in series from the top down is matched somebody with somebody
Hydrophone, bottom injection well downhole flow regulator and part flow arrangement, are connected with packer on the periphery of part flow arrangement, oil well is divided into and is in by packer
The top oil reservoir and the bottom oil layer below the oil reservoir of top of top layer, matches somebody with somebody between top oil reservoir and top injection well downhole flow regulator with top
Water flow passage, there is the bottom in part flow arrangement to match somebody with somebody water flow passage between bottom oil layer and bottom injection well downhole flow regulator, and water flow passage is matched somebody with somebody at top
Mutually arrange parallel with water flow passage with bottom, and the company of the normally closed type that builds the pressure being connected with part flow arrangement below packer
Port valve；
Step 2, closes top and matches somebody with somebody water flow passage, and pressure is injected in separate injection tubing string less than connection valve opening pressure by oil pipe
Hydraulic medium, hydraulic medium acts on packer and realizes that packer is acted on；
Step 3, improves the pressure of hydraulic medium so that the pressure of hydraulic medium is more than the Opening pressure of communicating valve, and opens institute
Have with water flow passage, by oil pipe to water filling in separate injection tubing string, then current are matched somebody with somebody with water flow passage and bottom by top in separate injection tubing string
By current dispensing to top oil reservoir and bottom oil layer, packer has two and is respectively defined as upper and lower packer, lower packet in road
Bottom oil layer is divided into into middle part oil reservoir and bottom oil layer, bottom injection well downhole flow regulator there are two and is respectively communicate corresponding with middle part oil reservoir
Middle part injection well downhole flow regulator and the bottom injection well downhole flow regulator for communicating corresponding with bottom oil layer, bottom with water flow passage have it is corresponding with middle part oil reservoir
Water flow passage is matched somebody with somebody in middle part with water flow passage and bottom corresponding with bottom oil layer, and lower end of the middle part with water flow passage extends to lower packet
Lower section and by ductus arteriosus occluder, with water flow passage in periphery of the bottom with water flow passage, communicating valve is connected to middle part with current at middle part
At position on road between upper and lower packer, and in step 2, bottom is also blocked with water flow passage, top injection well downhole flow regulator and
Middle part injection well downhole flow regulator passes through respectively the water-distributing gap opened up on periphery and corresponding water distribution flow passage, and bottom injection well downhole flow regulator passes through bottom end
Mouth and bottom water distribution flow passage, part flow arrangement includes the tapping sleeve being sleeved on the periphery of bottom injection well downhole flow regulator, tapping sleeve
Upper end extend to middle part injection well downhole flow regulator on water-distributing gap top and be sealedly connected on middle part injection well downhole flow regulator periphery on, tapping sleeve
Lower end be connected with the tap being serially connected in below the injection well downhole flow regulator of bottom, every being provided with the bottom with bottom injection well downhole flow regulator on tap
The bottom tapping hole of port connection and the middle part tap hole connected with the bottom mouth of pipe of tapping sleeve, the lower end in bottom tapping hole connects
Bottom tapping pipe in being connected to for extending to bottom oil layer, on the bottom injection well downhole flow regulator connect with water flow passage by bottom tapping
The tube chamber of pipe and bottom tapping hole are formed, on the middle part injection well downhole flow regulator connect with water flow passage by middle part tap hole and tapping sleeve
Segment dislocation.
2. down-hole dispensing method according to claim 1, it is characterised in that top oil reservoir is the straight well for vertically extending up and down
Section, bottom oil layer is the lower curved section being obliquely installed in above-below direction.
3. separate injection tubing string, it is characterised in that including the top injection well downhole flow regulator, bottom injection well downhole flow regulator and shunting dress that are sequentially connected in series from the top down
Putting, being connected with the periphery of part flow arrangement for oil well to be divided into top oil reservoir in top layer and in top oil reservoir lower section
Bottom oil layer packer, be provided with part flow arrangement for connect bottom oil layer and bottom injection well downhole flow regulator and with top injection well downhole flow regulator
And water flow passage is matched somebody with somebody in the top between the oil reservoir of top with the parallel arrangement of bottom of water flow passage, connects below packer on part flow arrangement
The communicating valve of the normally closed type that builds the pressure opened when being connected to for the pressure for being more than packer setting with the pressure in water flow passage in bottom,
Packer has two and is respectively used for every the upper packer being located between top oil reservoir and bottom oil layer and for bottom is oily
Layer is divided into the lower packet of middle part oil reservoir and bottom oil layer, and bottom injection well downhole flow regulator has two and is respectively used for middle part oil reservoir note
The middle part injection well downhole flow regulator of water and for the bottom injection well downhole flow regulator of bottom oil layer water filling, bottom injection well downhole flow regulator is serially connected under the injection well downhole flow regulator of middle part
Side, the bottom has middle part corresponding with middle part oil reservoir with water flow passage and bottom corresponding with bottom oil layer water distribution with water flow passage
Runner, middle part injection well downhole flow regulator passes through the water-distributing gap opened up on periphery and middle part water distribution flow passage, and bottom injection well downhole flow regulator passes through bottom end
Mouth and bottom water distribution flow passage, part flow arrangement includes the tapping sleeve being sleeved on the periphery of bottom injection well downhole flow regulator, tapping sleeve
Upper end extend to middle part injection well downhole flow regulator on water-distributing gap top and be sealedly connected on middle part injection well downhole flow regulator periphery on, tapping sleeve
Lower end be connected with the tap being serially connected in below the injection well downhole flow regulator of bottom, every being provided with the bottom with bottom injection well downhole flow regulator on tap
The bottom tapping hole of port connection and the middle part tap hole connected with the bottom mouth of pipe of tapping sleeve, the lower end in bottom tapping hole connects
Bottom tapping pipe in being connected to for extending to bottom oil layer, on the bottom injection well downhole flow regulator connect with water flow passage by bottom tapping
The tube chamber of pipe and bottom tapping hole are formed, on the middle part injection well downhole flow regulator connect with water flow passage by middle part tap hole and tapping sleeve
Segment dislocation.
4. separate injection tubing string according to claim 3, it is characterised in that the lower end of middle part tap hole is connected with and is sleeved on bottom
Sealing sleeve pipe on the periphery of isocon, sealing sleeve pipe extends to the bottom of bottom tapping pipe, and in sealing sleeve pipe and bottom point
Have between flow tube for extending to the shunting gap of bottom oil layer from top oil reservoir, be equipped with shunting gap for sealing up point
The annular plugging device of the bottom opening of ebb interval.
5. separate injection tubing string according to claim 4, it is characterised in that communicating valve be assemblied on the periphery of sealing sleeve pipe in
At position between upper and lower packer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410634711.4A CN104453808B (en) | 2014-11-10 | 2014-11-10 | Underground separate injection method and separate injection pipe column |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410634711.4A CN104453808B (en) | 2014-11-10 | 2014-11-10 | Underground separate injection method and separate injection pipe column |
Publications (2)
| Publication Number | Publication Date |
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| CN104453808A CN104453808A (en) | 2015-03-25 |
| CN104453808B true CN104453808B (en) | 2017-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410634711.4A Active CN104453808B (en) | 2014-11-10 | 2014-11-10 | Underground separate injection method and separate injection pipe column |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105507861A (en) * | 2016-01-06 | 2016-04-20 | 李永立 | Tubular column for separated layer water injection |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1908366A (en) * | 2005-08-05 | 2007-02-07 | 中国石化胜利油田有限公司临盘采油厂 | Underground three layer diverter |
| CN201843594U (en) * | 2010-11-11 | 2011-05-25 | 中国石油天然气股份有限公司 | Tubular column with fine separated layer water injection process |
| CN202745840U (en) * | 2012-08-13 | 2013-02-20 | 中国石油天然气股份有限公司 | High-efficiency injection pipe string for large-inclination well |
| CN203097854U (en) * | 2013-01-15 | 2013-07-31 | 中国石油天然气股份有限公司 | Water injection shunt and water injection shunt pipe column |
| CN103806884A (en) * | 2013-11-01 | 2014-05-21 | 中国石油天然气股份有限公司 | Three-layer separate injection string and three-layer separate injection method for oil well |
-
2014
- 2014-11-10 CN CN201410634711.4A patent/CN104453808B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1908366A (en) * | 2005-08-05 | 2007-02-07 | 中国石化胜利油田有限公司临盘采油厂 | Underground three layer diverter |
| CN201843594U (en) * | 2010-11-11 | 2011-05-25 | 中国石油天然气股份有限公司 | Tubular column with fine separated layer water injection process |
| CN202745840U (en) * | 2012-08-13 | 2013-02-20 | 中国石油天然气股份有限公司 | High-efficiency injection pipe string for large-inclination well |
| CN203097854U (en) * | 2013-01-15 | 2013-07-31 | 中国石油天然气股份有限公司 | Water injection shunt and water injection shunt pipe column |
| CN103806884A (en) * | 2013-11-01 | 2014-05-21 | 中国石油天然气股份有限公司 | Three-layer separate injection string and three-layer separate injection method for oil well |
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| CN104453808A (en) | 2015-03-25 |
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