CN101864921B - 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 PDF

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Publication number
CN101864921B
CN101864921B CN 201010198082 CN201010198082A CN101864921B CN 101864921 B CN101864921 B CN 101864921B CN 201010198082 CN201010198082 CN 201010198082 CN 201010198082 A CN201010198082 A CN 201010198082A CN 101864921 B CN101864921 B CN 101864921B
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China
Prior art keywords
sealing
intubate
layering
iii
tubular column
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CN 201010198082
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Chinese (zh)
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CN101864921A (en
Inventor
齐月魁
单桂栋
刘长军
王晓梅
韩莉
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大港油田集团有限责任公司
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Priority to CN 201010198082 priority Critical patent/CN101864921B/en
Publication of CN101864921A publication Critical patent/CN101864921A/en
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Publication of CN101864921B publication Critical patent/CN101864921B/en

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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

The completion of horizontal well, flow string and completion thereof, oil production technology
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 main mainly with 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 technique; 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 with 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 technique has, the advantage that cost is relatively low, in case but after the water outlet, because horizontal well does not have segmentation, implement machinery or chemical water shutoff all very difficult, behind water exit interval of shutoff, end water can be very fast around arriving another interval, do not have too large effect to delaying bottom water coning, cause edge and basal water, 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 hole diameter irregular is so that the effective packing oil-water-layer of horizontal well Open-Hole Section packer, the deficiency that causes edge and basal water, control water failure 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, upper 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, lower screen casing, flushing valve, lower 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 upper 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 lower adopts 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; Upper screen casing is positioned at the top oil reservoir, and lower screen casing is positioned at the bottom oil reservoir; Then, setting pipe external packer I; Cementing well in completion tubular column and the 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 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 the pickling tubing string, pickle enters completion tubular column by upper screen casing and bore hole annulus flows downward, and enters in the pickling tubing string through lower screen casing, perforated pipe, intubate, upwards returns out well head through ball-and-seat again; After the pickling end of job, set 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, be lowered in the completion tubular column to seal up and adopt lower tubular column, envelope and adopt upper tubing string down, close 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 to 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 lower 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 closed bottom oil reservoir, exploitation top oil reservoir, be connected to the oil pipe lower end with adopting giving up of upper tubing string under the envelope, 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 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 to 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 lower screen casing place; 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 technique is combined with the later stage oil recovery technique, by the sealing between completion tubular column and the flow string, improve segmented seal effect between completion tubular column and the uncased wellbore, delay bottom water coning, realize the purpose of water-control oil-increasing.
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 to 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); Sleeve pipe 1 lower end of completion tubular column 100 has sizing collar 2, casing nipple 3, external packer of pipe I 4, blind plate 5, sleeve pipe 1, layering sealing drum I 6, upper 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, lower screen casing 24, flushing valve 12, lower screen casing 24, guide shoe 13 to be fixedly connected sequentially; Above-mentioned parts when connecting, can be as required the sleeve pipe 1 that do not wait of connecting length therein.External packer of pipe I 4 is in angle buildup interval, can be equipped with as required the quantity of external packer of pipe I 4, 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 interference fit with the sealing intubate external surface that inserts wherein, forms sealing.Seal wherein is generally quality of rubber materials.
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 ready.
Pickling tubing string 110 is installed in the completion tubular column 100, seals up and adopt lower tubular column 120, envelope and lower adopt tubing string 130, close 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 be as required the oil pipe 14 that do not wait of connecting length therein, so that packer 17 is positioned at upper 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 swollen envelope completion tubular column 100 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 be as required the oil pipe 14 that do not wait of connecting length therein, so that 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, 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 lower adopt tubing string 130 (referring to accompanying drawing 4) 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, block head 25 be fixedly connected sequentially; Above-mentioned parts is when connecting, can be as required the oil pipe 14 that do not wait of connecting length therein, so that 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, 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 be as required the oil pipe 14 that do not wait of connecting length therein, so that 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, 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 upper tubing string 130, close adopt tubing string 140 assemble respectively complete after, cement the well first, the pickling operation, carry out oil producing operation, its step is as follows again:
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; Upper screen casing 7 is positioned at top oil reservoir 101, and lower 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 5 in the completion tubular column 100 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 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.
In the annular space between completion tubular column 100 and the pickling tubing string 110, inject pickle, pickle enters completion tubular column 100 by upper screen casing 7 and flows downward with bore hole annulus, enter in the pickling tubing string 110 through lower screen casing 24, perforated pipe 23, upwards return well head through ball-and-seat 22 again;
After the pickling end of job, set 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: according to the oil producing operation needs, be lowered in the completion tubular column 100 to seal up and adopt lower tubular column 120, envelope and adopt upper tubing string 130 down, close arbitrary tubing string of adopting in the tubing string 140 and produce.
When the oil reservoir of needs closed upper portion reservoir exploitation bottom, adopt giving up of lower tubular column 120 and 15 be connected to 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 interference fit, perforated pipe 23 is positioned at lower screen casing 24 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 the oil reservoir of needs sealings reservoir exploitation top, bottom, adopt giving up of upper tubing string 130 and 15 be connected to the oil pipe lower end envelope is lower, 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 to 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 lower screen casing 24 places; 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, above-described embodiment 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 (6)

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 first paragraph sleeve pipe (1) lower end of completion tubular column (100), first paragraph casing nipple (3), external packer of pipe I (4), blind plate (5), second segment sleeve pipe (1), layering sealing drum I (6), upper screen casing (7), layering sealing drum II (8), second segment casing nipple (3), external packer of pipe II (9), the 3rd section sleeve pipe (1), external packer of pipe III (10), the 3rd section casing nipple (3), layering sealing drum III (11), screen casing under the first paragraph (24), flushing valve (12), screen casing under the second segment (24), guide shoe (13) is 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);
The conveying of described pickling tubing string (110) is fixedly connected sequentially with oil pipe (14), give up (15), first paragraph oil pipe (14), packer (17), upper strata oil pipe (14), sealing intubate I, second segment oil pipe (14), constant pressure valve (19), sealing intubate II, safety joint (21), the 3rd section oil pipe (14), ball-and-seat (22), perforated pipe (23), intubate (26); Packer (17) is positioned at upper screen casing (7) middle part or the top of completion tubular column (100), sealing intubate I, sealing intubate II lay respectively in layering sealing drum II (8), the layering sealing drum III (11) of completion tubular column (100), and sealing intubate I, sealing intubate II and layering sealing drum II (8), layering sealing drum III (11) are interference fit;
Described give up (15), first paragraph oil pipe (14), sealing intubate I (16), upper strata oil pipe (14), sealing intubate II (18), second segment 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 H (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);
Give up (15), first paragraph oil pipe (14), sealing intubate I (16), perforated pipe (23), sealing intubate II (18), second segment 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);
Described give up (15), first paragraph oil pipe (14), sealing intubate I (16), first paragraph perforated pipe (23), sealing intubate II (18), second segment oil pipe (14), constant pressure valve (19), sealing intubate III (20), safety joint (21), second segment 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).
2. the according to claim 1 completion of described horizontal well, flow string, it is characterized in that: described giving up (15) given up for back-off; Described safety joint (21) is disconnection sand washing safety joint.
3. 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; Upper screen casing (7) is positioned at top oil reservoir (101), and screen casing under first paragraph and the second segment (24) is positioned at bottom oil reservoir (103); Then, setting pipe external packer I (4); Again to the interior cementing well of completion tubular column (100) and uncased wellbore annular space;
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 middle part or the top of screen casing (7), and sealing intubate I, sealing intubate II lay respectively in layering sealing drum II (8), the layering sealing drum III (11) of completion tubular column (100); Set packer (17);
In the annular space between completion tubular column (100) and the pickling tubing string (110), inject pickle, pickle enters completion tubular column (100) by upper screen casing (7) and flows downward with bore hole annulus, enter in the pickling tubing string (110) through screen casing (24), perforated pipe (23), intubate (26) under first paragraph and the second segment, upwards return well head through ball-and-seat (22) again;
After the pickling end of job, set 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, be lowered to described sealing up in the completion tubular column (100) and adopt lower tubular column (120), envelope and adopt upper tubing string (130) down, close arbitrary tubing string of adopting in the tubing string (140).
4. according to claim 3 described horizontal well completion, oil production technology is characterized in that:
To seal up give up (15) of adopting lower tubular column (120) and be connected to 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 interference fit, perforated pipe (23) is positioned at screen casing under the first paragraph (24) 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 to (15) top of giving up proposes pit shaft.
5. according to claim 3 described horizontal well completion, oil production technology is characterized in that:
To seal down give up (15) of adopting tubing string (130) and be connected to 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 to (15) top of giving up proposes pit shaft.
6. according to claim 3 described horizontal well completion, oil production technology is characterized in that:
To close give up (15) of adopting tubing string (140) and be connected to 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); First paragraph 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 the second segment perforated pipe (23) of sealing intubate III (20) below is positioned at screen casing under the first paragraph (24) and locates; The block head of lower end (25) is positioned at the top of flushing valve (12);
The oil pipe that will be connected to (15) top of giving up proposes pit shaft.
CN 201010198082 2010-06-11 2010-06-11 Well completion and oil production string of horizontal well and well completion and oil production processes thereof CN101864921B (en)

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