CN104213894B - Selective repeated fracturing process for old well of oil field - Google Patents
Selective repeated fracturing process for old well of oil field Download PDFInfo
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- CN104213894B CN104213894B CN201310220061.4A CN201310220061A CN104213894B CN 104213894 B CN104213894 B CN 104213894B CN 201310220061 A CN201310220061 A CN 201310220061A CN 104213894 B CN104213894 B CN 104213894B
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- packer
- interval
- fracturing
- tubing string
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000005516 engineering process Methods 0.000 claims abstract description 21
- 238000010276 construction Methods 0.000 claims abstract description 19
- 230000009466 transformation Effects 0.000 claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 238000005086 pumping Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 2
- 238000005488 sandblasting Methods 0.000 abstract description 3
- 239000011148 porous material Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 238000012856 packing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000001131 transforming effect Effects 0.000 description 2
- 239000003129 oil well Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
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Abstract
The invention discloses a selective repeated fracturing process technology for an old well of an oil field, which is designed for effectively solving the problem of repeated transformation of the old well of the oil field. The technology of the invention adopts the technical steps of assembling, putting in a pipe column, dragging the pipe column to complete the perforation operation of the section to be reformed, setting an upper packer and a middle packer, performing fracturing construction of the newly added section at the bottom, deblocking and dragging the pipe column to the second newly added reformed section for construction. The technology of the invention utilizes hydraulic sand blasting perforation to form large-aperture and deep-penetrating pore canals, can effectively reduce the fracture pressure, and utilizes the advantages of a double-seal single-clamp fracturing process to reduce the requirements on well mouth matching and casing steel grade. The technical pipe column has simple structure, flexible construction method, convenient operation and high efficiency, can effectively solve the problem of repeated reconstruction of the old well of the oil field, can complete repeated fracturing of the reconstructed layer section, and can also perform integrated operation of hole repairing and fracturing of the newly added layer section.
Description
Technical field
The present invention relates to a kind of oilfield old well selectivity refracturing technique, belong to oil gas field pressure
Split technical field.
Background technology
Conventional hydraulic sandblasting pressure break is that the hydraulic sand blasting fracturing string dragging band underseal is constructed
The multilayer of well or multistage pressure break, the packing of its interval that can only ensure lower floor has been constructed.For
For old well, newly-designed transformation interval is likely distributed in the centre transforming interval, by routine
Tubing string cannot meet packing top and transform the requirement of interval.Double envelope single deck tape-recorder pressure breaks need first to construction
All construction intervals of well carry out conventional perforation, the pressure produced when so easily causing nearly well band pore-forming
Real infringement, affects oil well productivity.
Summary of the invention
It is an object of the invention to provide a kind of oilfield old well selectivity refracturing technique, its energy
Effectively solve the problem that oilfield old well repeats transformation.
The technology of the present invention construction use process pipe string by oil pipe, safety give up, upper packer,
Middle packer, hydraulic ejector, lower packet, ball seat, ball-and-seat, eye pipe and plug composition.
The concrete technology step of the technology of the present invention is as follows:
1) according to repeat transformation needs and the interval of design, assembling, under enter this tubing string；
2) repeatedly drag this tubing string, complete the perforating job of required transformation interval；
3) after all perforations that need to transform interval complete, transfer this tubing string and increase newly to orlop
The position of transformation interval, then, delivers steel ball from well head and opens the cunning in controlled upper packer
Set, starts upper packer and sets, and and then steel ball continues to move down, and opens controlled middle packer
Interior sliding sleeve, packer setting in also starting, last steel ball continues traveling downwardly, and falls in ball seat；
4) after upper packer, middle packer and lower packet set, this tubing string just constitutes
The structure of double envelope single deck tape-recorder fracturing technology tubing strings, can directly carry out the pressing crack construction of orlop section；
5), after the pressing crack construction until orlop section completes, fracturing unit truck stops pumping, allows three envelopes
Unseal every device, then drag tubing string and increase the position transforming interval to second newly, then restart pressure
Split truck pumping, again set three packers, complete the pressing crack construction of the second newly-increased transformation interval；
6) the like, repeat step 5, complete the construction of all newly-increased transformation intervals.
The technology of the present invention utilizes hydraulic jet perforation to form large aperture and deep penetrating duct, can have
Effect reduces fracture pressure, utilize double envelope single deck tape-recorder fracturing technology advantage low to well head supporting and casing steel
The requirement of level.The technology of the present invention tubular column structure is simple, construction method is flexible, easy to operate and effect
Rate is high, can effectively solve oilfield old well and repeat the problem of transformation, can complete to have transformed interval
Refracturing, also can carry out perforations adding and the pressure break one operation of newly-increased interval.
Accompanying drawing explanation
Fig. 1 is that oilfield old well has transformed interval schematic diagram.
Fig. 2 is that the technology of the present invention tubing string carries out perforation schematic diagram to newly-increased orlop section.
Fig. 3 is that the technology of the present invention tubing string carries out perforation schematic diagram to newly-increased second interval.
Fig. 4 is that the technology of the present invention tubing string carries out pressure break schematic diagram to newly-increased orlop section.
Fig. 5 is that the technology of the present invention tubing string carries out pressure break schematic diagram to newly-increased second interval.
Detailed description of the invention
Embodiment:
Embodiment referring to figs. 1 through 5 pairs of the technology of the present invention further illustrates:
As a example by the old well of a bite oilfield horizontal well, there are two sections to transform interval, now again to mend
Hole and newly-increased transformation interval two sections.The process pipe string that this construction uses is given up by oil pipe 1, safety
2, upper packer 3, middle packer 4, hydraulic ejector 5, lower packet 6, ball seat 7,
Ball-and-seat 8, eye pipe 9 and plug 10 form.
The concrete technology step of the technology of the present invention is as follows:
1) according to repeat transformation needs and the interval of design, assembling, under enter this tubing string (see
Fig. 2)；
2) repeatedly drag this tubing string, complete required transformation interval perforating job (see Fig. 2,3)；
3) after all perforations that need to transform interval complete, transfer this tubing string and increase newly to orlop
The position A of transformation interval, then, delivers steel ball from well head, opens controlled upper packer 3
Interior sliding sleeve, starts upper packer 3 and sets, and and then steel ball continues to move down, and opens controlled
Sliding sleeve in middle packer 4, in also starting, packer 4 sets, and last steel ball continues traveling downwardly,
Fall in ball seat 7 (see Fig. 4)；
4) after upper packer 3, middle packer 4 and lower packet 6 set, this tubing string is just
Constituting the structure of double envelope single deck tape-recorder fracturing technology tubing string, the pressure break that can directly carry out orlop section is executed
Work (see Fig. 4)；
5), after the pressing crack construction until orlop section completes, fracturing unit truck stops pumping, allows three packings
Device unseals, and then drags tubing string and increases transformation interval B newly to second, then restarts fracturing unit truck pump
Send, again set three packers, complete the second newly-increased transformation interval B pressing crack construction (see
Fig. 5)；
6) the like, repeat step 5, complete all constructions that need to transform interval.
Claims (1)
1. an oilfield old well selectivity refracturing technique, it is characterised in that:
Use process pipe string by oil pipe (1), safety give up (2), upper packer (3), in
Packer (4), hydraulic ejector (5), lower packet (6), ball seat (7), ball-and-seat (8),
Eye pipe (9) and plug (10) composition；
Concrete technology step is as follows:
1) according to repeat transformation needs and the interval of design, assembling, under enter this tubing string；
2) repeatedly drag this tubing string, complete the perforating job of required transformation interval；
3) after all perforations that need to transform interval complete, this tubing string is transferred new to orlop
Increase the position (A) of interval, then, deliver steel ball from well head and open controlled upper packer (3)
Interior sliding sleeve, starts upper packer (3) and sets, and and then steel ball continues to move down, and opening can
Sliding sleeve in the middle packer (4) of control, in also starting, packer (4) sets, last steel ball
Continue traveling downwardly, fall in ball seat (7)；
4) after upper packer (3), middle packer (4) and lower packet (6) set, this pipe
Post just constitutes the structure of double envelope single deck tape-recorder fracturing technology tubing string, can directly carry out orlop new
Increase the pressing crack construction of section；
5), after the pressing crack construction until orlop section completes, fracturing unit truck stops pumping, allows three
Removing seal for packer, then drags tubing string and increases transformation interval (B) newly to second, then restart
Fracturing unit truck pumps, and again sets three packers, completes the second newly-increased transformation interval (B)
Pressing crack construction；
6) the like, repeat step 5, complete all constructions that need to transform interval.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310220061.4A CN104213894B (en) | 2013-06-05 | 2013-06-05 | Selective repeated fracturing process for old well of oil field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310220061.4A CN104213894B (en) | 2013-06-05 | 2013-06-05 | Selective repeated fracturing process for old well of oil field |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104213894A CN104213894A (en) | 2014-12-17 |
| CN104213894B true CN104213894B (en) | 2016-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310220061.4A Active CN104213894B (en) | 2013-06-05 | 2013-06-05 | Selective repeated fracturing process for old well of oil field |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104727798B (en) * | 2015-03-30 | 2017-03-08 | 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 | A kind of low permeability gas reservoir turns to refracturing process |
| CN110206505A (en) * | 2019-05-16 | 2019-09-06 | 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 | Old well reconstruction method for dragging and fracturing coiled tubing by patching and plugging |
| CN110284865B (en) * | 2019-06-27 | 2021-09-10 | 大庆油田有限责任公司 | Process method for completing repeated fracturing and energy supplement of compact oil horizontal well at one time |
| CN112177581B (en) * | 2019-07-02 | 2022-06-03 | 中国石油天然气股份有限公司 | Repeated fracturing method for old well |
| CN111827934A (en) * | 2020-08-04 | 2020-10-27 | 中国石油天然气股份有限公司 | Method for improving gas injection by using old well bore |
| CN112324416B (en) * | 2020-11-05 | 2022-08-30 | 中国石油天然气股份有限公司 | Multi-packer process pipe column and method for selective and repeated reconstruction of old well |
| CN113107418B (en) * | 2021-03-25 | 2023-05-05 | 中煤科工集团西安研究院有限公司 | Segmented pressure-maintaining grouting device and method for horizontal drilling of water-bearing layer of coal seam floor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7516797B2 (en) * | 2004-12-20 | 2009-04-14 | Zinoviy Dmitrievich Khomynets | Method for operating a well jet device in the conditions of a formation hydraulic fracturing |
| CN201513162U (en) * | 2009-08-20 | 2010-06-23 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Multilayer-section fracturing device of releasing tubular column |
| CN202250014U (en) * | 2011-10-08 | 2012-05-30 | 华鼎鸿基石油工程技术(北京)有限公司 | Dual-packing single-clamping staged fracturing tool |
| CN102619494A (en) * | 2012-04-16 | 2012-08-01 | 江苏如通石油机械股份有限公司 | Multi-section sliding sleeve type sand jet perforating and fracturing tool |
| CN102691495A (en) * | 2012-05-18 | 2012-09-26 | 中国石油天然气股份有限公司 | Staged fracturing method for casing cementing well completion high-fracture stratum horizontal well |
-
2013
- 2013-06-05 CN CN201310220061.4A patent/CN104213894B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7516797B2 (en) * | 2004-12-20 | 2009-04-14 | Zinoviy Dmitrievich Khomynets | Method for operating a well jet device in the conditions of a formation hydraulic fracturing |
| CN201513162U (en) * | 2009-08-20 | 2010-06-23 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Multilayer-section fracturing device of releasing tubular column |
| CN202250014U (en) * | 2011-10-08 | 2012-05-30 | 华鼎鸿基石油工程技术(北京)有限公司 | Dual-packing single-clamping staged fracturing tool |
| CN102619494A (en) * | 2012-04-16 | 2012-08-01 | 江苏如通石油机械股份有限公司 | Multi-section sliding sleeve type sand jet perforating and fracturing tool |
| CN102691495A (en) * | 2012-05-18 | 2012-09-26 | 中国石油天然气股份有限公司 | Staged fracturing method for casing cementing well completion high-fracture stratum horizontal well |
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| Publication number | Publication date |
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| CN104213894A (en) | 2014-12-17 |
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