CN104213894A - Selective repeated fracturing process technology for old well of oil field - Google Patents
Selective repeated fracturing process technology for old well of oil field Download PDFInfo
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- CN104213894A CN104213894A CN201310220061.4A CN201310220061A CN104213894A CN 104213894 A CN104213894 A CN 104213894A CN 201310220061 A CN201310220061 A CN 201310220061A CN 104213894 A CN104213894 A CN 104213894A
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- 238000005516 engineering process Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 6
- 238000010276 construction Methods 0.000 claims abstract description 21
- 230000009466 transformation Effects 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 10
- 239000010959 steel Substances 0.000 claims abstract description 10
- 238000005086 pumping Methods 0.000 claims description 6
- 230000001131 transforming effect Effects 0.000 claims description 5
- 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 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 the selective repeated fracturing of a kind of oilfield old well, belong to oil-gas field fracturing technical field.
Background technology
Conventional hydraulic sandblasting pressure break is that the hydraulic sand blasting fracturing string dragging band underseal carries out constructing the multilayer of well or multistage pressure break, the packing of its interval that can only ensure to have constructed to lower floor.For old well, newly-designed transformation interval may be distributed in the centre of having transformed interval, cannot meet with conventional tubing string the requirement that interval has been transformed on packing top.Two envelope single deck tape-recorder pressure break needs first carry out conventional perforation to all construction intervals of construction well, easily like this causes the compacting infringement produced during nearly well band pore-forming, affects oil well productivity.
Summary of the invention
The object of the present invention is to provide the selective repeated fracturing of a kind of oilfield old well, it effectively can solve the problem that oilfield old well repeats to transform.
The process pipe string that the technology of the present invention construction adopts is given up by oil pipe, safety, upper packer, middle packer, hydraulic ejector, lower packet, ball seat, ball-and-seat, eye pipe and plug form.
The concrete technology step of the technology of the present invention is as follows:
1) according to the needs repeating to transform 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 need transforming interval complete, transfer the position that this tubing string to orlop increases transformation interval newly, then, open the sliding sleeve in controlled upper packer from well head delivery steel ball, start upper packer and set, and then steel ball continues to move down, open the sliding sleeve in controlled middle packer, also packer setting in starting, last steel ball continues descending, falls in ball seat;
4) after upper packer, middle packer and lower packet set, this tubing string just constitutes the structure being similar to two envelope single deck tape-recorder fracturing technology tubing strings, directly can carry out the pressing crack construction of orlop section;
5) after the pressing crack construction of orlop section completes, fracturing unit truck stops pumping, allows three removing seal for packers, then the position of tubing string to the second newly-increased transformation interval is dragged, restart fracturing unit truck pumping again, 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, effectively can reduce fracture pressure, utilizes the requirement of the low and casing grade supporting to well head of two envelope single deck tape-recorder fracturing technology advantage.The technology of the present invention tubular column structure is simple, construction method is flexible, easy to operate and efficiency is high, effectively can solve the problem that oilfield old well repeats to transform, the refracturing having transformed interval can be completed, also can carry out perforations adding and the operation of pressure break one 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:
For the old well of a bite oilfield horizontal well, there are two sections to transform interval, now again will transform interval two sections with newly-increased by perforations adding.The process pipe string that this construction adopts gives up 2 by oil pipe 1, safety, 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 the needs repeating to transform and the interval of design, assembling, under enter this tubing string (see figure 2);
2) repeatedly drag this tubing string, complete the perforating job (see Fig. 2,3) of required transformation interval;
3) after all perforations need transforming interval complete, transfer the position A that this tubing string to orlop increases transformation interval newly, then, deliver steel ball from well head, open the sliding sleeve in controlled upper packer 3, start upper packer 3 to set, and then steel ball continues to move down, and opens the sliding sleeve in controlled middle packer 4, and in also starting, packer 4 sets, last steel ball continues descending, falls into (see figure 4) in ball seat 7;
4) after upper packer 3, middle packer 4 and lower packet 6 set, this tubing string just constitutes the structure of similar two envelope single deck tape-recorder fracturing technology tubing string, directly can carry out the pressing crack construction (see figure 4) of orlop section;
5) after the pressing crack construction of orlop section completes, fracturing unit truck stops pumping, allows three removing seal for packers, then tubing string to the second newly-increased transformation interval B is dragged, restart fracturing unit truck pumping again, again set three packers, complete the pressing crack construction (see figure 5) of the second newly-increased transformation interval B;
6) the like, repeat step 5, complete all constructions need transforming interval.
Claims (1)
1. the selective repeated fracturing of oilfield old well, is characterized in that:
The process pipe string that the technology of the present invention construction adopts is given up (2) by oil pipe (1), safety, 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 the needs repeating to transform 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 need transforming interval complete, transfer the position (A) that this tubing string to orlop increases interval newly, then, open the sliding sleeve in controlled upper packer (3) from well head delivery steel ball, start upper packer (3) and set, and then steel ball continues to move down, open the sliding sleeve in controlled middle packer (4), also in starting, packer (4) sets, and last steel ball continues descending, falls in ball seat (7);
4) after upper packer (3), middle packer (4) and lower packet (6) set, this tubing string just constitutes the structure of similar two envelope single deck tape-recorder fracturing technology tubing string, directly can carry out the pressing crack construction of the orlop section of increasing newly;
5) after the pressing crack construction of orlop section completes, fracturing unit truck stops pumping, allow three removing seal for packers, then tubing string to the second newly-increased transformation interval (B) is dragged, restart fracturing unit truck pumping again, again set three packers, complete the pressing crack construction of the second newly-increased transformation interval (B);
6) the like, repeat step 5, complete all constructions need transforming 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 true CN104213894A (en) | 2014-12-17 |
| CN104213894B CN104213894B (en) | 2016-09-07 |
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| 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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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104727798A (en) * | 2015-03-30 | 2015-06-24 | 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 | Low permeability gas reservoir turning repeated fracturing technological method |
| 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 |
| CN110284865A (en) * | 2019-06-27 | 2019-09-27 | 大庆油田有限责任公司 | Process is once completed in fine and close grease horizontal well refracturing and energy supplement |
| 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 |
| CN112177581A (en) * | 2019-07-02 | 2021-01-05 | 中国石油天然气股份有限公司 | Repeated fracturing method for old well |
| CN112324416A (en) * | 2020-11-05 | 2021-02-05 | 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 |
| CN113107418A (en) * | 2021-03-25 | 2021-07-13 | 中煤科工集团西安研究院有限公司 | Sectional pressure-maintaining grouting device and method for horizontal drilling of coal seam floor aquifer |
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| 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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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 |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104727798A (en) * | 2015-03-30 | 2015-06-24 | 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 | Low permeability gas reservoir turning repeated fracturing technological method |
| 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 |
| WO2020228088A1 (en) * | 2019-05-16 | 2020-11-19 | 中国石油天然气集团有限公司 | Sleeve patch plugging continuous oil pipe drag fracturing old well reconstruction method |
| CN110284865A (en) * | 2019-06-27 | 2019-09-27 | 大庆油田有限责任公司 | Process is once completed in fine and close grease horizontal well refracturing and energy supplement |
| 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 |
| CN112177581A (en) * | 2019-07-02 | 2021-01-05 | 中国石油天然气股份有限公司 | Repeated fracturing method for old well |
| 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 |
| CN112324416A (en) * | 2020-11-05 | 2021-02-05 | 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 |
| 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 |
| CN113107418A (en) * | 2021-03-25 | 2021-07-13 | 中煤科工集团西安研究院有限公司 | Sectional pressure-maintaining grouting device and method for horizontal drilling of coal seam floor aquifer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104213894B (en) | 2016-09-07 |
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