CN104196512A - Oil well horizontal well oil jacket simultaneous injection type double-sealing single-clamping volume fracturing tubular column and fracturing method thereof - Google Patents
Oil well horizontal well oil jacket simultaneous injection type double-sealing single-clamping volume fracturing tubular column and fracturing method thereof Download PDFInfo
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- CN104196512A CN104196512A CN201410423439.5A CN201410423439A CN104196512A CN 104196512 A CN104196512 A CN 104196512A CN 201410423439 A CN201410423439 A CN 201410423439A CN 104196512 A CN104196512 A CN 104196512A
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Abstract
The invention belongs to the technical field of oil and gas field reservoir reformation, and particularly relates to an oil well horizontal well oil jacket simultaneous injection type double-sealing single-clamping volume fracturing tubular column and a fracturing method thereof. The tubular column comprises an oil tube, and the tail end of the oil tube is sequentially connected with a packer, a check valve, a perforated tube and a guide centering device. A pressure transmitting ejector is connected between the packer and the oil tube. A second packer, a third packer and an annular injection valve are connected in series to the oil tube. The second packer is placed above the pressure transmitting ejector, the third packer is placed above the second packer, and the annular injection valve is placed above the third packer and is connected to the oil tube in series next to the third packer. The problems that a common double-sealing single-clamping staged fracturing technology is only suitable for oil tube injection fracturing construction in the prior art, fluid friction is large, and construction displacement cannot be improved easily can be solved, liquid flow is injected into the oil tube and a casing pipe at the same time, and layer-by-layer layered volume fracturing construction of an oil well horizontal well can be achieved from bottom to top.
Description
Technical field
The invention belongs to oil gas field stimulation technology field, is one of fracturing technology tubing string conventional in the operation of oil gas field reservoir reconstruction, is specifically related to a kind of oil well horizontal well oil jacket with note formula two envelope single deck tape-recorder volume fracturing tubing string and fracturing process.
Background technology
Be accompanied by the further exploitation in oil field, horizontal well volume fracturing process as a kind of efficient reforming mode using the main reforming mode as ultra-low penetration oil reservoir, two envelope single deck tape-recorder staged fracturing technique is the effective technological measure of one of staged fracturing of horizontal well transformation, and this technology is widely used in the old well of each block oil well horizontal well and repeats to transform in operation.
Be accompanied by the further exploitation in oil field, " volume fracturing " as a kind of efficient reforming mode using the main reforming mode as ultra-low penetration oil reservoir.Current two envelope single deck tape-recorder staged fracturing technology tube pillars are made up of instruments such as safety joint, inflatable packer, pressure-guiding sand blower, guiding plugs, it is only applicable to oil pipe and injects pressing crack construction, fluid frictional resistance is large, and operational discharge capacity is difficult to improve, and cannot meet the construction demand of " volume fracturing ".
Summary of the invention
The object of the invention is to overcome existing general two envelope single deck tape-recorder staged fracturing techniques and be only applicable to oil pipe injection pressing crack construction, fluid frictional resistance is large, and operational discharge capacity is difficult to the problem improving.
For this reason, the invention provides a kind of oil well horizontal well oil jacket with the two envelope of note formula single deck tape-recorder volume fracturing tubing string, comprise oil pipe, the end of oil pipe is connected with packer, ball-and-seat, eye pipe and righting-oriented device in turn, is connected with pilot ejector between packer and oil pipe;
On oil pipe, be serially connected with the second packer, the 3rd packer and annular space injection valve, described the second packer is positioned at pilot ejector top, the 3rd packer is positioned at the second packer top, and annular space injection valve is positioned at the 3rd packer top and adjacent the 3rd packer is serially connected on oil pipe.
Distance between described the 3rd packer and packer is greater than the length that needs fractured interval.
Described packer and the second packer are inflatable packer, and the 3rd packer is mechanical packer.
As a fracturing process for above-mentioned volume fracturing tubing string, comprise the steps,
1) connect tubing string and lower brill: need the length of the interval of pressure break to connect tubing string according to Oil/gas Well, make the distance between the 3rd packer and packer be greater than the length that needs fractured interval, then lower boring, packer is positioned at need to need below of the construction layer of pressure break, between packer and the second packer, is target zone;
2) set: set the 3rd packer;
3) pressing crack construction: all simultaneously inject fracturing fluid in rail and annular space, fracturing fluid is through flowing out in pilot ejector, produce throttling official post simultaneously and obtain packer and the second packer setting, now fracturing fluid is by the interface channel of construction interval and sleeve pipe, and the bottom entering between packer and the second packer carries out pressing crack construction;
4) drag tubing string: after pressing crack construction completes, drag tubing string and go upward to the preceding paragraph target zone;
5) repeating step 2), 3), 4) until complete all pressing crack constructions.
Above-mentioned steps 3) in the interface channel of construction interval and sleeve pipe, before step 1), to keep passage to open, when construction well is while being new well, need to adopt the mode of conventional tubing transmission that perforating gun is sent into design attitude, disposable all intervals of this well are carried out to perforating job.
Beneficial effect of the present invention: this oil well horizontal well oil jacket of the present invention is with note formula two envelope single deck tape-recorder volume fracturing tubing string and fracturing process, the interval of unlatching on target zone with the 3rd packer and the second packer packing, the liquid stream that annular space injects enters in oil pipe near construction section position in down-hole, mixed liquid stream flows in the shorter oil pipe in down-hole, enter construction interval through pressure-guiding sand blower, realize the volume fracturing construction to target zone, this repetition volume fracturing rebuilding construction, can realize the oil well horizontal well successively layering volume fracturing construction from bottom to top of having constructed.
Below with reference to accompanying drawing, the present invention is described in further details.
Brief description of the drawings
Fig. 1 is that tubing string of the present invention is at net horizontal section operation structure schematic diagram.
Description of reference numerals: 1, annular space injection valve; 2, the 3rd packer; 3, the second packer; 4, pilot ejector; 5, packer; 6, ball-and-seat; 7, eye pipe; 8, righting-oriented device; 9, oil pipe.
Detailed description of the invention
Embodiment 1:
Inject pressing crack construction in order to make two envelope single deck tape-recorder staged fracturing technique not be only applicable to oil pipe, and can adapt to oil pipe annular space and inject pressure break simultaneously, the invention provides a kind of oil well horizontal well oil jacket with the two envelope of note formula single deck tape-recorder volume fracturing tubing string, as shown in Figure 1, comprise oil pipe 9, the end of oil pipe 9 is connected with packer 5, ball-and-seat 6, eye pipe 7 and righting-oriented device 8 in turn, between packer 5 and oil pipe 9, is connected with pilot ejector 4; Described packer 5 and the second packer 3 are inflatable packer, and the 3rd packer 2 is mechanical packer.
On oil pipe 9, be serially connected with the second packer 3, the 3rd packer 2 and annular space injection valve 1, described the second packer 3 is positioned at pilot ejector 4 tops, the 3rd packer 2 is positioned at the second packer 3 tops, annular space injection valve 1 is positioned at the 3rd packer 2 tops and adjacent the 3rd packer 2 is serially connected on oil pipe 9, here so-called " top " all directions (direction while connecting tubing string) when the vertical state with tubing string, figure meta is set to operating position.Distance between the 3rd packer 2 and packer 5 is greater than the length that needs fractured interval.
This tubing string string of the present embodiment, the second packer 3 and between device 5 corresponding bottom be pressure break target zone, fracturing fluid can spray from annular space injection valve 1, then enters bottom by the interface channel of sleeve pipe and carries out fracturing work; After completing, overall pipe string moves on carrying out, and continues the pressure break of next position, constantly repeated work process, the from bottom to top different stratum of staged fracturing.
Embodiment 2:
On the basis of above-described embodiment, the present invention proposes a kind of fracturing process, comprise the steps,
First check the wellbore conditions before construction, this fracturing process that the present invention proposes, is applied to the oil well horizontal well of having constructed, and the interface channel of all construction intervals and sleeve pipe is opened; If construction well is new well, need to carry out perforating job, can adopt the mode of conventional tubing transmission that perforating gun is sent into design attitude, disposable all intervals of this well are carried out to perforating job.
Next carry out operation according to the following step:
1) connect tubing string and lower brill: carry out the connection of tubing string according to the structure in above-described embodiment, need the length of the interval of pressure break to determine the position of each packer according to Oil/gas Well, make the distance between the 3rd packer 2 and packer 5 be greater than the length that needs fractured interval, then lower boring, packer 5 is positioned at need to need below of the construction layer of pressure break, between packer 5 and the second packer 3, is target zone;
2) set: the 3rd packer 2 is generally mechanical packer, adopt the mechanical systems such as rotation drilling tool that the 3rd packer 2 is set;
3) pressing crack construction: all simultaneously inject fracturing fluid in rail 9 and annular space, the fracturing fluid that oil jacket annular space injects is entered in oil pipe 9 by annular space injection valve 1 near construction section position in down-hole, interior the flowing of oil pipe 9 that mixed fracturing fluid is shorter in down-hole, fracturing fluid is through flowing out in pilot ejector 4, produce that throttling official post obtains packer 5 and the second packer 3 sets simultaneously, now fracturing fluid is by the interface channel of construction interval and sleeve pipe, and the bottom entering between packer 5 and the second packer (3) carries out pressing crack construction;
4) drag tubing string: after previous step pressing crack construction completes, drag tubing string up, leave the interval of pressure break, go upward to the not interval of pressure break of top;
5) repeating step 2), 3), 4), make that tubing string constantly rises, pressure break, from bottom to top, segmentation completes the pressure break of each construction section.
By above fracturing process, when having realized oil pipe and sleeve pipe, inject fracturing fluid, operational discharge capacity is high, can realize top-down successively volume fracturing construction.
Each assembly in the tubing string relating in embodiment is existing structure, in market, all can obtain by purchase, does not specify at this.
More than exemplifying is only to illustrate of the present invention, does not form the restriction to protection scope of the present invention, within the every and same or analogous design of the present invention all belongs to protection scope of the present invention.
Claims (5)
1. an oil well horizontal well oil jacket is with the two envelope of note formula single deck tape-recorder volume fracturing tubing string, comprise oil pipe (9), the end of oil pipe (9) is connected with packer (5), ball-and-seat (6), eye pipe (7) and righting-oriented device (8) in turn, it is characterized in that: between packer (5) and oil pipe (9), be connected with pilot ejector (4);
On oil pipe (9), be serially connected with the second packer (3), the 3rd packer (2) and annular space injection valve (1), described the second packer (3) is positioned at pilot ejector (4) top, the 3rd packer (2) is positioned at the second packer (3) top, and annular space injection valve (1) is positioned at the 3rd packer (2) top and adjacent the 3rd packer (2) is serially connected on oil pipe (9).
2. oil well horizontal well oil jacket as claimed in claim 1, with the two envelope of note formula single deck tape-recorder volume fracturing tubing string, is characterized in that: the distance between described the 3rd packer (2) and packer (5) is greater than the length that needs fractured interval.
3. oil well horizontal well oil jacket as claimed in claim 1, with the two envelope of note formula single deck tape-recorder volume fracturing tubing string, is characterized in that: described packer (5) and the second packer (3) are inflatable packer, and the 3rd packer (2) is mechanical packer.
4. a fracturing process for the volume fracturing tubing string as described in claim 1 ~ 3, is characterized in that: comprises the steps,
1) connect tubing string and lower brill: need the length of the interval of pressure break to connect tubing string according to Oil/gas Well, make the distance between the 3rd packer (2) and packer (5) be greater than the length that needs fractured interval, then lower boring, packer (5) is positioned at need to need below of the construction layer of pressure break, between packer (5) and the second packer (3), is target zone;
2) set: set the 3rd packer (2);
3) pressing crack construction: all simultaneously inject fracturing fluid in rail (9) and annular space, fracturing fluid is through flowing out in pilot ejector (4), produce that throttling official post obtains packer (5) and the second packer (3) sets simultaneously, now fracturing fluid is by the interface channel of construction interval and sleeve pipe, and the bottom entering between packer (5) and the second packer (3) carries out pressing crack construction;
4) drag tubing string: after pressing crack construction completes, drag tubing string and go upward to the preceding paragraph target zone;
5) repeating step 2), 3), 4) until complete all pressing crack constructions.
5. fracturing process as claimed in claim 4, it is characterized in that: the interface channel of construct in step 3) interval and sleeve pipe, before step 1), to keep passage to open, in the time that construction well is new well, need to adopt the mode of conventional tubing transmission that perforating gun is sent into design attitude, disposable all intervals of this well be carried out to perforating job.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410423439.5A CN104196512B (en) | 2014-08-26 | 2014-08-26 | Oil well horizontal well oil jacket is the same as the double envelope single deck tape-recorder volume fracturing tubing strings of note formula and fracturing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410423439.5A CN104196512B (en) | 2014-08-26 | 2014-08-26 | Oil well horizontal well oil jacket is the same as the double envelope single deck tape-recorder volume fracturing tubing strings of note formula and fracturing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104196512A true CN104196512A (en) | 2014-12-10 |
| CN104196512B CN104196512B (en) | 2017-12-26 |
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| CN201410423439.5A Active CN104196512B (en) | 2014-08-26 | 2014-08-26 | Oil well horizontal well oil jacket is the same as the double envelope single deck tape-recorder volume fracturing tubing strings of note formula and fracturing process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110671058A (en) * | 2019-09-10 | 2020-01-10 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Double-sealing single-clamping process pipe column of old horizontal well and method for realizing large-discharge transformation |
| CN112267864A (en) * | 2020-09-21 | 2021-01-26 | 中国石油天然气股份有限公司 | Repeated fracturing device and method for large-displacement horizontal well |
| CN115324550A (en) * | 2022-08-09 | 2022-11-11 | 中国石油天然气集团有限公司 | Hydraulic coiled tubing dragging fracturing tool and technological method |
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| CN203394491U (en) * | 2013-06-05 | 2014-01-15 | 中国石油天然气股份有限公司 | Integrated perforating and fracturing tubing string for selective and repetitive reconstruction of old well in oil field |
| CN204082116U (en) * | 2014-08-26 | 2015-01-07 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Oil well horizontal well oil jacket is with note formula two envelope single deck tape-recorder volume fracturing tubing string |
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- 2014-08-26 CN CN201410423439.5A patent/CN104196512B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20030121663A1 (en) * | 2001-12-31 | 2003-07-03 | Xiaowei Weng | Method and apparatus for placement of multiple fractures in open hole wells |
| CN202300357U (en) * | 2011-09-30 | 2012-07-04 | 中国石油化工股份有限公司 | Well cementing staged fracturing well completion pipe column with controllable valves and hydraulic control switch pipe column |
| CN203321476U (en) * | 2013-06-05 | 2013-12-04 | 中国石油天然气股份有限公司 | Coiled tubing controllable packer technique pipe for repeated reconstruction of old wells |
| CN203394491U (en) * | 2013-06-05 | 2014-01-15 | 中国石油天然气股份有限公司 | Integrated perforating and fracturing tubing string for selective and repetitive reconstruction of old well in oil field |
| CN103470242A (en) * | 2013-09-14 | 2013-12-25 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Oilfield horizontal well volume fracturing method |
| CN204082116U (en) * | 2014-08-26 | 2015-01-07 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Oil well horizontal well oil jacket is with note formula two envelope single deck tape-recorder volume fracturing tubing string |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110671058A (en) * | 2019-09-10 | 2020-01-10 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Double-sealing single-clamping process pipe column of old horizontal well and method for realizing large-discharge transformation |
| CN112267864A (en) * | 2020-09-21 | 2021-01-26 | 中国石油天然气股份有限公司 | Repeated fracturing device and method for large-displacement horizontal well |
| CN115324550A (en) * | 2022-08-09 | 2022-11-11 | 中国石油天然气集团有限公司 | Hydraulic coiled tubing dragging fracturing tool and technological method |
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| CN104196512B (en) | 2017-12-26 |
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Effective date of registration: 20211021 Address after: 100007 Oil Mansion, 9 North Avenue, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CHINA NATIONAL PETROLEUM CORPORATION CHUANQING DRILLING ENGINEERING Co. Address before: 710018 room 1207, Changqing building, Changqing Xing Long Yuan District, Xi'an, Shaanxi Patentee before: CHINA NATIONAL PETROLEUM CORPORATION CHUANQING DRILLING ENGINEERING COMPANY LIMITED CHANGQING DOWNHOLE TECHNOLOGY Co. |