CN101864921A - Well completion and oil production string of horizontal well and well completion and oil production processes thereof - Google Patents
Well completion and oil production string of horizontal well and well completion and oil production processes thereof Download PDFInfo
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- CN101864921A CN101864921A CN 201010198082 CN201010198082A CN101864921A CN 101864921 A CN101864921 A CN 101864921A CN 201010198082 CN201010198082 CN 201010198082 CN 201010198082 A CN201010198082 A CN 201010198082A CN 101864921 A CN101864921 A CN 101864921A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 238000007789 sealing Methods 0.000 claims abstract description 336
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000005516 engineering process Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000005406 washing Methods 0.000 claims abstract description 5
- 238000005554 pickling Methods 0.000 claims description 43
- 238000011010 flushing procedure Methods 0.000 claims description 23
- 210000002445 nipple Anatomy 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 8
- 235000021110 pickles Nutrition 0.000 claims description 6
- 238000004513 sizing Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 5
- 230000001788 irregular Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract description 2
- 238000012216 screening Methods 0.000 abstract 4
- 239000002253 acid Substances 0.000 abstract 1
- 230000007547 defect Effects 0.000 abstract 1
- 230000003111 delayed effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 2
- 240000007817 Olea europaea Species 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The invention relates to a well completion and oil production string of a horizontal well and well completion and oil production processes. In order to overcome the defect that in traditional horizontal well open hole sand-proof screening pipe well completion construction, an open hole packer at a horizontal section cannot effectively seal and separate oil and water layers because of irregular well diameter, a well completion string is fixedly arranged at the horizontal well section in an open hole well bore; a grading hoop, a casing short section, an external casing packer I, a blind plate, a casing, a layered seal tube I, an upper screening pipe, a layered seal tube II, a second casing short section, an external casing packer II, the other casing, an external casing packer III, a third casing short section, a layered seal tube III, a lower screening pipe, a wash-down valve, the lower screening pipe and a guiding shoe of the well completion string are sequentially and fixedly connected; and an acid washing string, a string for sealing up and producing oil from down, a string for sealing down and producing oil from up or a commingled production string is arranged in the well completion string. The invention has the beneficial effects that the well completion process of the horizontal well is combined with a post oil production technology, the sectioned sealing effect between the well completion string and the open hole well bore is improved, bottom water coning is delayed, and the purposes of controlling water and increasing oil are achieved.
Description
Affiliated technical field
The present invention relates to a kind of horizontal well production method and flow string thereof, especially relate to a kind of completion, flow string and completion thereof, oil production technology of horizontal well, this oil production technology and flow string are particularly suitable for the horizontal well production operation of limit bottom water reservoir.
Background technology
Along with the development of petroleum exploration and development technology, adopt the horizontal well technology development of fields, become effective technology means that improve oil recovery rate, well yield, exploitation remaining oil, reduce production cost per tone oil.Horizontal well is many based on the well cementation perforation completion at present, and the bottom water coning control water problems of horizontal segment can solve by shutoff in the pipe, optimum perforation technology; For the horizontal well with the limit bottom water reservoir, completion mode adopts the bare screen sand control completion usually, because the irregular effectively packing oil-water-layer of horizontal segment open hole packer that causes of hole diameter; After water content rose, conventional completion tubular column can't control effectively, and makes the horizontal well High-efficient Production increase difficulty.For the horizontal well completion that has the limit bottom water reservoir, the main packer that adopts is with two borders of water layer card envelope, the middle technology that connects with blind pipe, and is easy and simple to handle although this technology has, the advantage that cost is relatively low, in case but after the water outlet, because horizontal well does not have segmentation, it is all very difficult to implement machinery or chemical water shutoff, behind water exit interval of shutoff, end water can be very fast around arriving another interval, do not have too big effect to delaying bottom water coning, cause the limit bottom water coning, the failure of control water.
Summary of the invention
In order to overcome in the construction of existing level well bare screen sand control completion, because the irregular effectively packing oil-water-layer of horizontal well bore hole section packer that makes of hole diameter, cause the limit bottom water coning, control the deficiency that water is failed, the invention provides a kind of completion, flow string and completion thereof, oil production technology of horizontal well.
The technical solution adopted for the present invention to solve the technical problems is: the completion of horizontal well, flow string, net horizontal section have top oil reservoir, water layer, bottom oil reservoir, and the net horizontal section in uncased wellbore is installed with completion tubular column; The sizing collar of the sleeve pipe lower end of completion tubular column, casing nipple, external packer of pipe I, blind plate, sleeve pipe, layering sealing drum I, last screen casing, layering sealing drum II, casing nipple, external packer of pipe II, sleeve pipe, external packer of pipe III, casing nipple, layering sealing drum III, following screen casing, flushing valve, following screen casing, guide shoe are fixedly connected sequentially; The pickling tubing string is installed in the completion tubular column or seals up to adopt under lower tubular column or the envelope and adopt tubing string or close and adopt tubing string; The intubate of pickling tubing string lower end is inserted in the flushing valve; Adopt tubing string under sealing up and adopt lower tubular column, sealing, close the flushing valve top that the lower end of adopting tubing string is positioned at completion tubular column.The oil pipe of pickling tubing string, give up, oil pipe, packer, oil pipe, sealing intubate II, oil pipe, constant pressure valve, sealing intubate III, safety joint, oil pipe, ball-and-seat, perforated pipe, intubate be fixedly connected sequentially, intubate is inserted in the flushing valve; Packer is positioned at the last screen casing middle part of completion tubular column, sealing intubate II, sealing intubate III lay respectively in layering sealing drum II, the layering sealing drum III of completion tubular column, and sealing intubate II, sealing intubate III and layering sealing drum II, layering sealing drum III are interference fit.Seal up and adopt the giving up of lower tubular column, oil pipe, sealing intubate I, oil pipe, sealing intubate II, oil pipe, constant pressure valve, sealing intubate III, safety joint, perforated pipe, block head and be fixedly connected sequentially; Sealing intubate I, sealing intubate II, sealing intubate III lay respectively in layering sealing drum I, layering sealing drum II, the layering sealing drum III of completion tubular column, and sealing intubate I, sealing intubate II, sealing intubate III and layering sealing drum I, layering sealing drum II, layering sealing drum III are interference fit.Envelope is adopted down the giving up of tubing string, oil pipe, sealing intubate I, perforated pipe, sealing intubate II, oil pipe, constant pressure valve, sealing intubate III, safety joint, block head and is fixedly connected sequentially; Sealing intubate I, sealing intubate II, sealing intubate III lay respectively in layering sealing drum I, layering sealing drum II, the layering sealing drum III of completion tubular column, and sealing intubate I, sealing intubate II, sealing intubate III and layering sealing drum I, layering sealing drum II, layering sealing drum III are interference fit.Close and adopt the giving up of tubing string, oil pipe, sealing intubate I, perforated pipe, sealing intubate II, oil pipe, constant pressure valve, sealing intubate III, safety joint, perforated pipe, block head and be fixedly connected sequentially; Sealing intubate I, sealing intubate II, sealing intubate III lay respectively in layering sealing drum I, layering sealing drum II, the layering sealing drum III of completion tubular column, and sealing intubate I, sealing intubate II, sealing intubate III and layering sealing drum I, layering sealing drum II, layering sealing drum III are interference fit.Use completion, the horizontal well completion of flow string, the oil production technology of above-mentioned horizontal well, its step is as follows: 1, well cementation, at first fixedly mount blind plate between external packer of pipe I, the layering sealing drum I with completion tubular column, and be lowered in the uncased wellbore, layering sealing drum I is positioned at oil reservoir upper end, top, layering sealing drum II is positioned at top oil reservoir and water layer boundary, and layering sealing drum III is positioned at water layer and bottom oil reservoir boundary; Last screen casing is positioned at the top oil reservoir, and following screen casing is positioned at the bottom oil reservoir; Then, setting pipe external packer I; Cementing well in completion tubular column and uncased wellbore annular space again.2, pickling: at first blind plate is bored and open; The pickling tubing string is lowered in the completion tubular column, the intubate of pickling tubing string lower end is inserted in the flushing valve again; The packer of pickling tubing string upper end is positioned at the middle part or the top of screen casing, and sealing intubate II, sealing intubate III lay respectively in layering sealing drum II, the layering sealing drum III of completion tubular column; Set the packer of upper end; Inject pickle in the annular space between completion tubular column and pickling tubing string, pickle enters completion tubular column by last screen casing and bore hole annulus flows downward, and process screen casing, perforated pipe, intubate down enters in the pickling tubing string, upwards returns out well head through ball-and-seat again; After the pickling end of job, set the external packer of pipe II and the external packer of pipe III of completion tubular column; The pickling tubing string is proposed pit shaft.3, oil producing operation: according to the oil producing operation needs, in completion tubular column, be lowered to seal up adopt lower tubular column, envelope is down adopted tubing string, is closed arbitrary tubing string of adopting in the tubing string.When needs closed upper portion oil reservoir, exploitation bottom oil reservoir, adopt giving up of lower tubular column and be connected the oil pipe lower end sealing up, send in the completion tubular column, in layering sealing drum I, the layering sealing drum II that seal intubate I, seal intubate II, sealing intubate III lays respectively at completion tubular column, the layering sealing drum III, sealing intubate I, sealing intubate II, sealing intubate III and layering sealing drum I, layering sealing drum II, layering sealing drum III are interference fit, perforated pipe is positioned at screen casing place down, and the block head of lower end is positioned at the top of flushing valve; The oil pipe of the top of giving up is proposed pit shaft.When needs were closed bottom oil reservoir, exploitation top oil reservoir, adopting giving up of tubing string was connected the oil pipe lower end down with envelope, sends in the completion tubular column; Sealing intubate I, sealing intubate II, sealing intubate III lay respectively in layering sealing drum I, layering sealing drum II, the layering sealing drum III of completion tubular column, and sealing intubate I, sealing intubate II, sealing intubate III and layering sealing drum I, layering sealing drum II, layering sealing drum III are interference fit; Perforated pipe is positioned at the screen casing place, and the block head of lower end is positioned at the top of flushing valve; The oil pipe of the top of giving up is proposed pit shaft.When needs are exploited top oil reservoir and bottom oil reservoir simultaneously, adopt giving up of tubing string and be connected the oil pipe lower end closing, send in the completion tubular column; Sealing intubate I, sealing intubate II, sealing intubate III lay respectively in layering sealing drum I, layering sealing drum II, the layering sealing drum III of completion tubular column, and sealing intubate I, sealing intubate II, sealing intubate III and layering sealing drum I, layering sealing drum II, layering sealing drum III are interference fit; Perforated pipe between layering sealing drum I and the layering sealing drum II is positioned at the screen casing place, and the perforated pipe of sealing intubate III below is positioned at screen casing place down; The block head of lower end is positioned at the top of flushing valve; The oil pipe of the top of giving up is proposed pit shaft.
The invention has the beneficial effects as follows, horizontal well completion technology is combined with the later stage oil recovery technique,, improve segmented seal effect between completion tubular column and the uncased wellbore, delay bottom water coning, realize the purpose of water-control oil-increasing by the sealing between completion tubular column and the flow string.
Description of drawings
Fig. 1 is the completion of horizontal well of the present invention, the completion tubular column schematic diagram of flow string.
Fig. 2 is the completion of horizontal well of the present invention, the pickling working string schematic diagram of flow string.
Fig. 3 is that completion, the sealing up of flow string of horizontal well of the present invention adopted the lower tubular column schematic diagram.
Fig. 4 adopts the tubing string schematic diagram under the envelope of completion, flow string of horizontal well of the present invention.
Fig. 5 is that completion, the closing of flow string of horizontal well of the present invention adopted the tubing string schematic diagram.
Among the figure: 1. sleeve pipe, 2. sizing collar, 3. casing nipple, 4. external packer of pipe I, 5. blind plate, 6. layering sealing drum I, 7. go up screen casing, 8. layering sealing drum II, 9. external packer of pipe II, 10. external packer of pipe III, 11. layering sealing drum III, 12. flushing valves, 13. guide shoe, 14. oil pipes, 15. give up, 16. sealing intubate I, 17. packers, 18. sealing intubate II, 19. constant pressure valve, 20. sealing intubate III, 21. safety joints, 22. ball-and-seat, 23. perforated pipes, 24. times screen casings, 25. the end plug, 26. intubate, 100. completion tubular columns, 101. the top oil reservoir, 102. water layers, 103. bottom oil reservoirs, 110. pickling tubing string, adopt lower tubular column 120. seal up, adopt tubing string under 130. envelopes, 140. close and adopt tubing string.
The specific embodiment
Be described further below in conjunction with completion, flow string and completion thereof, the oil production technology of drawings and Examples horizontal well of the present invention.
The net horizontal section that the completion of horizontal well of the present invention, flow string are positioned at has top oil reservoir 101, water layer 102, bottom oil reservoir 103.Net horizontal section in uncased wellbore is installed with completion tubular column 100 (referring to accompanying drawing 1); There are sizing collar 2, casing nipple 3, external packer of pipe I 4, blind plate 5, sleeve pipe 1, layering sealing drum I 6 in sleeve pipe 1 lower end of completion tubular column 100, upward screen casing 7, layering sealing drum II 8, casing nipple 3, external packer of pipe II 9, external packer of pipe III 10, casing nipple 3, layering sealing drum III 11, following screen casing 24, flushing valve 12, following screen casing 24, guide shoe 13 are fixedly connected sequentially; Above-mentioned parts can connect the sleeve pipe 1 that is uneven in length as required therein when connecting.External packer of pipe I 4 is in angle buildup interval, can be equipped with the quantity of external packer of pipe I 4 as required, and 2 external packer of pipe I 4 are installed usually.
The layering sealing drum I 6 of completion tubular column 100, layering sealing drum II 8, layering sealing drum III 11 are tubular, endoporus has the annular groove more than 1, seal is installed in the annular groove, and seal is an interference fit with the sealing intubate external surface that inserts wherein, forms sealing.Seal wherein is generally the rubber material.
The effect of completion tubular column 100 is that well bore is implemented well cementing operation, for next step pickling operation and separate zone production operation are got ready.
Pickling tubing string 110 is installed in the completion tubular column 100, seal up adopt lower tubular column 120, envelope is down adopted tubing string 130, is closed arbitrary tubing string of adopting in the tubing string 140; The intubate 26 of pickling tubing string 110 lower ends is inserted in the flushing valve 12; Adopt tubing string 130 under sealing up and adopt lower tubular column 120, sealing, close flushing valve 12 tops that the lower end of adopting tubing string 140 is positioned at completion tubular column 100.
The oil pipe 14 of pickling tubing string 110 (referring to accompanying drawing 2), give up 15, packer 17, sealing intubate II18, constant pressure valve 19, sealing intubate III 20, safety joint 21, ball-and-seat 22, perforated pipe 23, intubate 26 be fixedly connected sequentially; Above-mentioned parts is when connecting, can connect the oil pipe 14 that is uneven in length as required therein, make packer 17 be positioned at last screen casing 7 middle parts or the top of completion tubular column 100, sealing intubate II 18, sealing intubate III 20 lay respectively in layering sealing drum II 8, the layering sealing drum III 11 of completion tubular column 100, and sealing intubate II 18, sealing intubate III 20 are interference fit with layering sealing drum II 8, layering sealing drum III 11.The packer 17 preferred olive shape packers of pickling tubing string 110, upper lifting pipe post when being convenient to sand plug.
The effect of pickling tubing string 110 is that well bore is carried out the pickling operation, and after the pickling operation was finished, external packer of pipe II 9, the external packer of pipe III 10 of the envelope completion tubular column 100 that expands finished the work of packing oil-water-layer, and the producing well section is divided into upper and lower two sections.
Seal up adopt lower tubular column 120 (referring to accompanying drawing 3) give up 15, oil pipe 14, sealing intubate I 16, sealing intubate II 18, constant pressure valve 19, sealing intubate III 20, safety joint 21, perforated pipe 23, block head 25 be fixedly connected sequentially; Above-mentioned parts is when connecting, can connect the oil pipe 14 that is uneven in length as required therein, make sealing intubate I 16, sealing intubate II 18, sealing intubate III 20 lay respectively in layering sealing drum I 6, the layering sealing drum II 8 of completion tubular column 100, the layering sealing drum III 11, sealing intubate I 16, sealing intubate II 18, sealing intubate III 20 are interference fit with layering sealing drum I 6, layering sealing drum II 8, layering sealing drum III 11.
Envelope is adopted down giving up 15, oil pipe 14, sealing intubate I 16, perforated pipe 23, sealing intubate II 18, constant pressure valve 19, sealing intubate III 20, safety joint 21, block head 25 and be fixedly connected sequentially of tubing string 130 (referring to accompanying drawing 4); Above-mentioned parts is when connecting, can connect the oil pipe 14 that is uneven in length as required therein, make sealing intubate I 16, sealing intubate II 18, sealing intubate III 20 lay respectively in layering sealing drum I 6, the layering sealing drum II 8 of completion tubular column 100, the layering sealing drum III 11, sealing intubate I 16, sealing intubate II 18, sealing intubate III 20 are interference fit with layering sealing drum I 6, layering sealing drum II 8, layering sealing drum III 11.
Close adopt tubing string 140 (referring to accompanying drawing 5) give up 15, oil pipe 14, sealing intubate I 16, perforated pipe 23, sealing intubate II 18, constant pressure valve 19, sealing intubate III 20, safety joint 21, perforated pipe 23, block head 25 be fixedly connected sequentially; Above-mentioned parts is when connecting, can connect the oil pipe 14 that is uneven in length as required therein, make sealing intubate I 16, sealing intubate II 18, sealing intubate III 20 lay respectively in layering sealing drum I 6, the layering sealing drum II 8 of completion tubular column 100, the layering sealing drum III 11, sealing intubate I 16, sealing intubate II 18, sealing intubate III 20 are interference fit with layering sealing drum I 6, layering sealing drum II 8, layering sealing drum III 11.
Giving up among the present invention 15 given up for back-off; Safety joint 21 is disconnection sand washing safety joint.
When implementing to change layer operation, if appearring in the tubing string of oil reservoir part, sand buries situation, as long as the upper lifting pipe post is to rated value, disconnection sand washing safety joint 21 will be thrown off, with the tubing string proposition well head of disconnection sand washing safety joint more than 21.
Use horizontal well completion, the oil production technology of horizontal well completion of the present invention, flow string, with completion tubular column 100, pickling tubing string 110, seal up adopt lower tubular column 120, the envelope under adopt tubing string 130, close adopt tubing string 140 assemble respectively finish after, cement the well earlier, the pickling operation, carry out oil producing operation again, its step is as follows:
A, well cementation: at first completion tubular column 100 is lowered in the uncased wellbore, make score layer sealing drum I 6 be positioned at top oil reservoir 101 upper ends, layering sealing drum II 8 is positioned at top oil reservoir 101 and water layer 102 boundarys, and layering sealing drum III 11 is positioned at water layer 102 and bottom oil reservoir 103 boundarys; Last screen casing 7 is positioned at top oil reservoir 101, and following screen casing 24 is positioned at bottom oil reservoir 103; Then, setting pipe external packer I 4; Cementing well in the annular space of completion tubular column 100 and uncased wellbore again.
B, pickling: at first the blind plate in the completion tubular column 100 5 is bored and open; Pickling tubing string 110 is lowered in the completion tubular column 100, the intubate 26 of pickling tubing string 110 lower ends is inserted in the flushing valve 12 again; The packer 17 of pickling tubing string 110 is positioned at the middle part or the top of screen casing 7, and sealing intubate II 18, sealing intubate III 20 lay respectively in layering sealing drum II 8, the layering sealing drum III 11 of completion tubular column 100; Then, set packer 17.
Inject pickle in the annular space between completion tubular column 100 and pickling tubing string 110, pickle enters completion tubular column 100 by last screen casing 7 and flows downward with bore hole annulus, process screen casing 24, perforated pipe 23 down enters in the pickling tubing string 110, upwards returns well head through ball-and-seat 22 again;
After the pickling end of job, set the external packer of pipe II 9 and the external packer of pipe III 10 of completion tubular column 100; Pickling tubing string 110 is proposed pit shaft.
C, oil producing operation:, in completion tubular column 100, be lowered to seal up and adopt lower tubular column 120, envelope and down adopt tubing string 130, close arbitrary tubing string of adopting in the tubing string 140 and produce according to the oil producing operation needs.
When the oil reservoir of needs closed upper portion reservoir exploitation bottom, adopt giving up of lower tubular column 120 and 15 be connected the oil pipe lower end sealing up, send in the completion tubular column, sealing intubate I 16, sealing intubate II 18, sealing intubate III 20 lays respectively at the layering sealing drum I 6 of completion tubular column 100, layering sealing drum II 8, in the layering sealing drum III 11, sealing intubate I 16, sealing intubate II 18, sealing intubate III 20 and layering sealing drum I 6, layering sealing drum II8, layering sealing drum III 11 is an interference fit, perforated pipe 23 is positioned at screen casing 24 places down, and the block head 25 of lower end is positioned at the top of flushing valve 12; The oil pipe of 15 tops of giving up is proposed pit shaft.Subsequently, can be lowered to oil well pump or other oil production equipments carry out oil producing operation.
When the oil reservoir of needs sealings reservoir exploitation top, bottom, envelope is adopted giving up of tubing string 130 down 15 be connected the oil pipe lower end, send in the completion tubular column; Sealing intubate I 16, sealing intubate II 18, sealing intubate III 20 lay respectively in layering sealing drum I 6, layering sealing drum II 8, the layering sealing drum III 11 of completion tubular column 100, and sealing intubate I 16, sealing intubate II 18, sealing intubate III 20 are interference fit with layering sealing drum I 6, layering sealing drum II8, layering sealing drum III 11; Perforated pipe 23 is positioned at screen casing 7 places, and the block head 25 of lower end is positioned at the top of flushing valve 12; The oil pipe of 15 tops of giving up is proposed pit shaft.Subsequently, can be lowered to oil well pump or other oil production equipments carry out oil producing operation.
When needs are exploited bottom oil reservoir and top oil reservoir simultaneously, adopt giving up of tubing string 140 and 15 be connected the oil pipe lower end closing, send in the completion tubular column; Sealing intubate I 16, sealing intubate II 18, sealing intubate III 20 lay respectively in layering sealing drum I 6, layering sealing drum II 8, the layering sealing drum III 11 of completion tubular column 100, and sealing intubate I 16, sealing intubate II 18, sealing intubate III 20 are interference fit with layering sealing drum I 6, layering sealing drum II 8, layering sealing drum III 11; Perforated pipe 23 between layering sealing drum I 6 and the layering sealing drum II 8 is positioned at screen casing 7 places, and the perforated pipe 23 of sealing intubate III 20 belows is positioned at screen casing 24 places down; The block head 25 of lower end is positioned at the top of flushing valve 12; The oil pipe of 15 tops of giving up is proposed pit shaft.Subsequently, can be lowered to oil well pump or other oil production equipments carry out oil producing operation.
It should be noted that, the foregoing description is example and unrestricted the present invention, according to basic principle of the present invention, can also design horizontal well completion, pickling, flow string more than 2 oil reservoirs, those skilled in the art can design a lot of alternate embodiments and not break away from the scope of claims.
Claims (10)
1. the completion of a horizontal well, flow string, net horizontal section has top oil reservoir, water layer, bottom oil reservoir at least, it is characterized in that:
Net horizontal section in uncased wellbore is installed with completion tubular column (100); The sizing collar (2) of sleeve pipe (1) lower end of completion tubular column (100), casing nipple (3), external packer of pipe I (4), blind plate (5), sleeve pipe (1), layering sealing drum I (6), last screen casing (7), layering sealing drum II (8), casing nipple (3), external packer of pipe II (9), sleeve pipe (1), external packer of pipe III (10), casing nipple (3), layering sealing drum III (11), following screen casing (24), flushing valve (12), following screen casing (24), guide shoe (13) are fixedly connected sequentially;
Pickling tubing string (110) is installed in the described completion tubular column (100) or seals up to adopt under lower tubular column (120) or the envelope and adopt tubing string (130) or close and adopt tubing string (140); The intubate (26) of pickling tubing string (110) lower end is inserted in the flushing valve (12) of completion tubular column (100); Adopt tubing string (130) under sealing up and adopt lower tubular column (120), sealing, close flushing valve (12) top that the lower end of adopting tubing string (140) is positioned at completion tubular column (100).
2. according to completion, the flow string of the described horizontal well of claim 1, it is characterized in that: the oil pipe (14) of described pickling tubing string (110), give up (15), oil pipe (14), packer (17), oil pipe (14), sealing intubate II (18), oil pipe (14), constant pressure valve (19), sealing intubate III (20), safety joint (21), oil pipe (14), ball-and-seat (22), perforated pipe (23), intubate (26) are fixedly connected sequentially; Packer (17) is positioned at last screen casing (7) middle part or the top of completion tubular column (100), sealing intubate II (18), sealing intubate III (20) lay respectively in layering sealing drum II (8), the layering sealing drum III (11) of completion tubular column (100), and sealing intubate II (18), sealing intubate III (20) are interference fit with layering sealing drum II (8), layering sealing drum III (11).
3. according to completion, the flow string of the described horizontal well of claim 1, it is characterized in that: described give up (15), oil pipe (14), sealing intubate I (16), oil pipe (14), sealing intubate II (18), oil pipe (14), constant pressure valve (19), sealing intubate III (20), safety joint (21), perforated pipe (23), the block head (25) of adopting lower tubular column (120) sealed up is fixedly connected sequentially; Sealing intubate I (16), sealing intubate II (18), sealing intubate III (20) lay respectively in layering sealing drum I (6), layering sealing drum II (8), the layering sealing drum III (11) of completion tubular column (100), and sealing intubate I (16), sealing intubate II (18), sealing intubate III (20) are interference fit with layering sealing drum I (6), layering sealing drum II (8), layering sealing drum III (11).
4. according to completion, the flow string of the described horizontal well of claim 1, it is characterized in that: give up (15), oil pipe (14), sealing intubate I (16), perforated pipe (23), sealing intubate II (18), oil pipe (14), constant pressure valve (19), sealing intubate III (20), safety joint (21), the block head (25) of adopting tubing string (130) under the described envelope are fixedly connected sequentially; Sealing intubate I (16), sealing intubate II (18), sealing intubate III (20) lay respectively in layering sealing drum I (6), layering sealing drum II (8), the layering sealing drum III (11) of completion tubular column (100), and sealing intubate I (16), sealing intubate II (18), sealing intubate III (20) are interference fit with layering sealing drum I (6), layering sealing drum II (8), layering sealing drum III (11).
5. according to completion, the flow string of the described horizontal well of claim 1, it is characterized in that: described give up (15), oil pipe (14), sealing intubate I (16), perforated pipe (23), sealing intubate II (18), oil pipe (14), constant pressure valve (19), sealing intubate III (20), safety joint (21), perforated pipe (23), the block head (25) of adopting tubing string (140) of closing is fixedly connected sequentially; Sealing intubate I (16), sealing intubate II (18), sealing intubate III (20) lay respectively in layering sealing drum I (6), layering sealing drum II (8), the layering sealing drum III (11) of completion tubular column (100), and sealing intubate I (16), sealing intubate II (18), sealing intubate III (20) are interference fit with layering sealing drum I (6), layering sealing drum II (8), layering sealing drum III (11).
6. according to completion, the flow string of the described arbitrary horizontal well of claim 2～5, it is characterized in that: described giving up (15) given up for back-off; Described safety joint (21) is disconnection sand washing safety joint.
7. an application rights requires completion, the horizontal well completion of flow string, the oil production technology of 1 described horizontal well, the steps include:
A, well cementation: completion tubular column (100) is lowered in the uncased wellbore, layering sealing drum I (6) is positioned at top oil reservoir (101) upper end, layering sealing drum II (8) is positioned at top oil reservoir (101) and water layer (102) boundary, and layering sealing drum III (11) is positioned at water layer (102) and bottom oil reservoir (103) boundary; Last screen casing (7) is positioned at top oil reservoir (101), and following screen casing (24) is positioned at bottom oil reservoir (103); Then, setting pipe external packer I (4); Cementing well in completion tubular column (100) and uncased wellbore annular space again;
B, pickling: at first blind plate (5) is bored and open; Pickling tubing string (110) is lowered in the completion tubular column (100), the intubate (26) of pickling tubing string (110) lower end is inserted in the flushing valve (12) again; The packer (17) of pickling tubing string (110) is positioned at the middle part or the top of screen casing (7), and sealing intubate II (18), sealing intubate III (20) lay respectively in layering sealing drum II (8), the layering sealing drum III (11) of completion tubular column (100); Set packer (17);
Inject pickle in the annular space between completion tubular column (100) and pickling tubing string (110), pickle enters completion tubular column (100) by last screen casing (7) and flows downward with bore hole annulus, process screen casing (24), perforated pipe (23), intubate (26) down enters in the pickling tubing string (110), upwards returns well head through ball-and-seat (22) again;
After the pickling end of job, set the external packer of pipe II (9) and the external packer of pipe III (10) of completion tubular column (100); Then, pit shaft is proposed pickling tubing string (110);
C, oil producing operation: according to the oil producing operation needs, in completion tubular column (100), be lowered to seal up adopt lower tubular column (120), envelope is down adopted tubing string (130), is closed arbitrary tubing string of adopting in the tubing string (140).
8. according to the described horizontal well completion of claim 7, oil production technology, it is characterized in that:
To seal up give up (15) of adopting lower tubular column (120) and be connected the oil pipe lower end, send in the completion tubular column, sealing intubate I (16), sealing intubate II (18), sealing intubate III (20) lays respectively at the layering sealing drum I (6) of completion tubular column (100), layering sealing drum II (8), in the layering sealing drum III (11), sealing intubate I (16), sealing intubate II (18), sealing intubate III (20) and layering sealing drum I (6), layering sealing drum II (8), layering sealing drum III (11) is an interference fit, screen casing (24) was located under perforated pipe (23) was positioned at, and the block head of lower end (25) is positioned at the top of flushing valve (12);
The oil pipe that will be connected (15) top of giving up proposes pit shaft.
9. according to the described horizontal well completion of claim 7, oil production technology, it is characterized in that:
To seal down give up (15) of adopting tubing string (130) and be connected the oil pipe lower end, send in the completion tubular column; Sealing intubate I (16), sealing intubate II (18), sealing intubate III (20) lay respectively in layering sealing drum I (6), layering sealing drum II (8), the layering sealing drum III (11) of completion tubular column (100), and sealing intubate I (16), sealing intubate II (18), sealing intubate III (20) are interference fit with layering sealing drum I (6), layering sealing drum II (8), layering sealing drum III (11); Perforated pipe (23) is positioned at screen casing (7) to be located, and the block head of lower end (25) is positioned at the top of flushing valve (12);
The oil pipe that will be connected (15) top of giving up proposes pit shaft.
10. according to the described horizontal well completion of claim 7, oil production technology, it is characterized in that:
To close give up (15) of adopting tubing string (140) and be connected the oil pipe lower end, send in the completion tubular column; Sealing intubate I (16), sealing intubate II (18), sealing intubate III (20) lay respectively in layering sealing drum I (6), layering sealing drum II (8), the layering sealing drum III (11) of completion tubular column (100), and sealing intubate I (16), sealing intubate II (18), sealing intubate III (20) are interference fit with layering sealing drum I (6), layering sealing drum II (8), layering sealing drum III (11); Perforated pipe (23) between layering sealing drum I (6) and the layering sealing drum II (8) is positioned at screen casing (7) to be located, and screen casing (24) was located under the perforated pipe (23) of sealing intubate III (20) below was positioned at; The block head of lower end (25) is positioned at the top of flushing valve (12);
The oil pipe that will be connected (15) top of giving up proposes pit shaft.
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| CN 201010198082 CN101864921B (en) | 2010-06-11 | 2010-06-11 | Well completion and oil production string of horizontal well and well completion and oil production processes thereof |
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| CN 201010198082 CN101864921B (en) | 2010-06-11 | 2010-06-11 | Well completion and oil production string of horizontal well and well completion and oil production processes thereof |
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