CN106089172B - Hydraulic full-bore large-displacement fracturing process - Google Patents
Hydraulic full-bore large-displacement fracturing process Download PDFInfo
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- CN106089172B CN106089172B CN201610402303.5A CN201610402303A CN106089172B CN 106089172 B CN106089172 B CN 106089172B CN 201610402303 A CN201610402303 A CN 201610402303A CN 106089172 B CN106089172 B CN 106089172B
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- pressure
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- sand
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- 238000000034 method Methods 0.000 title claims abstract description 5
- 238000006073 displacement reaction Methods 0.000 title abstract 3
- 239000004576 sand Substances 0.000 claims abstract description 23
- 238000010276 construction Methods 0.000 claims abstract description 11
- 238000005488 sandblasting Methods 0.000 claims abstract description 5
- 238000005516 engineering process Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 8
- 238000012856 packing Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 abstract description 2
- 210000000664 rectum Anatomy 0.000 description 4
- 208000035126 Facies Diseases 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention relates to the technical field of oil extraction engineering of oil fields, and belongs to a hydraulic full-bore large-displacement fracturing process. The invention effectively solves the problems of small drift diameter and low construction discharge capacity of the existing fracturing process. Firstly, connecting an expansion type fracturing packer (5), a pressure-guiding sand blower (4) and a plurality of full-bore pressure-guiding sand-blasting packers (3) with an oil pipe (2) and setting the depth of the packer into a casing (1) in advance; pressurizing, wherein hydraulic pressure passes through a pressure guide channel of the packer (3) and a pressure guide sand blower (4) to seal the packer; continuously adding hydraulic pressure to fracture the first layer; pressurizing, and enabling the pressure to enter a second layer of pressure guide channel to enable the variable-diameter ring (6) in the second layer of full-path pressure guide sand blasting packer (3) to shrink; the ball is thrown to the second layer, the hydraulic pressure is improved, and the sliding sleeve of the full-path pressure-guiding sand-blasting packer (3) of the second layer is opened, so that the second layer can be fractured; and performing fracturing construction from the third layer to the nth layer by using balls with the same specification. The invention has the advantages of large fracturing construction displacement, safety, high efficiency and the like.
Description
Technical field
The present invention relates to oil extraction in oil field field of engineering technology, belong to a kind of fluid pressure type full-bore huge discharge fracturing technology.
Background technology
Daqing oil field enters development late stage, and when peripheral hyposmosis FY oil-layer is developed, sand body is mainly fluvial facies deposit,
And based on narrow strips, interrupted band channel sand, scale of sand bodies is small, discontinuously.Tubing string commonly uses staged sliding sleeve knot at present
Structure, sanding machine sliding sleeve latus rectum reduce step by step（Latus rectum is φ 25- φ 40）, throttle effect is generated, frictional resistance is big, nearly 36% energy damage
It loses in the throttling of tubing string, limits the promotion of discharge capacity.Therefore fluid pressure type full-bore huge discharge fracturing technology is had developed, by complete
New design full-bore huge discharge multiple fracturing tubing string, keeps multistage sanding machine latus rectum identical, realizes big channel（Latus rectum is more than φ
50mm）.
Invention content
The purpose of the present invention is exactly that invention is a kind of under big channel condition, and the undergauge throttling of generation reduces, and can effectively reduce
Frictional resistance improves operational discharge capacity, to meet the fluid pressure type full-bore huge discharge pressure break that low permeability reservoir stitches net pressing crack construction on a large scale
Technique.
The present invention is realized by following device：The device by casing, oil pipe, full-bore pilot sand-blast packer,
Pressure-guiding sand blower, expansion type fracture packer and reducing ring composition；Wherein reducing ring is insulated embedded in full-bore pilot sandblasting
In device, oil pipe is placed in casing, and oil pipe is sequentially connected expansion type fracture packer, pressure-guiding sand blower and multiple all-pass from bottom to up
Diameter pilot sand-blast packer；Fluid pressure type full-bore huge discharge fracturing technology is through the following steps that realize：
A, expansion type fracture packer, pressure-guiding sand blower and multiple full-bore pilot sand-blast packers and oil pipe are connected first
Connect the simultaneously preset depth of tripping in casing；
B, ground high pressure liquid beats hydraulic pressure into oil pipe, and hydraulic pressure passes through full-bore pilot sand-blast packer and pressure-guiding sand blower
Pilot channel generates chock pressure difference by the sand jet outlet of full-bore pilot sand-blast packer and pressure-guiding sand blower, makes full-bore pilot
Sand-blast packer and expansion type fracture packer are all set, and realize target zone packing；
C, continue liquid feeding pressure and pressing crack construction is directly carried out to first layer；
D, hydraulic pressure is improved again, and highly pressurised liquid enters second layer full-bore pilot sand-blast packer ball seat pilot channel, makes
Reducing ring is shunk in two layers of full-bore pilot sand-blast packer, and carrying out pitching skidding set for second layer pressure break prepares；
E, well head throws pressure break ball, the tripping in second layer, and pressure break ball falls into the variable of second layer full-bore pilot sand-blast packer
After diameter ring, the sliding sleeve of hydraulic open second layer full-bore pilot sand-blast packer is improved, second layer pressure break channel is opened, you can right
The second layer carries out pressing crack construction；
F, d-e steps are repeated, third layer can be carried out to n-th layer multistage pressure break using same specification pressure break ball.
Compared with the prior art the present invention has the following advantages that：
Sliding sleeve and packer of the present invention carry out integrated design, and a whole set of tubing string designs for full-bore, and ball seat size is identical, throw
Same specification ball can open all sliding sleeves in fracturing string, and sliding sleeve does not have differential limitation, meet huge discharge, infinite stages pressure
Construction is split, is a kind of safe efficient, environmentally friendly vertical well fracture technology.
Description of the drawings：Fig. 1 is the field application schematic diagram of the present invention.
Specific implementation mode：Further auspicious state is made to the present invention below in conjunction with attached drawing：The present invention be by following device come
It realizes：The device is by casing 1, oil pipe 2, full-bore pilot sand-blast packer 3, pressure-guiding sand blower 4, expansion type fracture packer
5 and reducing ring 6 form；Wherein in full-bore pilot sand-blast packer 3, oil pipe 2 is placed in casing 1 reducing ring 6, oil
Pipe 2 is sequentially connected expansion type fracture packer 5, pressure-guiding sand blower 4 and multiple full-bore pilot sand-blast packers 3 from bottom to up；
Fluid pressure type full-bore huge discharge fracturing technology is through the following steps that realize：
A, first by expansion type fracture packer 5, pressure-guiding sand blower 4 and two full-bore pilot sand-blast packers 3 and oil
The connection of pipe 2 and 1 preset depth of tripping in casing；
B, ground high pressure liquid beats hydraulic pressure into oil pipe 2, and hydraulic pressure passes through full-bore pilot sand-blast packer 3 and pressure-guiding sand blower
4 pilot channel generates chock pressure difference by the sand jet outlet of full-bore pilot sand-blast packer 3 and pressure-guiding sand blower 4, makes full-bore
Pilot sand-blast packer 3 and expansion type fracture packer 5 are all set, and realize target zone packing；
C, continue liquid feeding pressure and pressing crack construction is directly carried out to first layer；
D, hydraulic pressure is improved again, and highly pressurised liquid enters 3 ball seat pilot channel of second layer full-bore pilot sand-blast packer, makes
Reducing ring 6 is shunk in two layers of full-bore pilot sand-blast packer 3, and carrying out pitching skidding set for second layer pressure break prepares；
E, well head throws pressure break ball, the tripping in second layer, and pressure break ball falls into the variable of second layer full-bore pilot sand-blast packer 3
After diameter ring 6, the sliding sleeve of hydraulic open second layer full-bore pilot sand-blast packer 3 is improved, second layer pressure break channel is opened, you can
Pressing crack construction is carried out to the second layer；
F, d-e steps are repeated, third layer pressure break is carried out using same specification pressure break ball.
Claims (1)
1. fluid pressure type full-bore huge discharge fracturing technology, the technique are realized by following device：The device is by casing
（1）, oil pipe（2）, full-bore pilot sand-blast packer（3）, pressure-guiding sand blower（4）, expansion type fracture packer（5）And reducing
Ring（6）Composition；Wherein reducing ring（6）Embedded in full-bore pilot sand-blast packer（3）In, oil pipe（2）It is placed in casing（1）In,
Oil pipe（2）It is sequentially connected expansion type fracture packer from bottom to up（5）, pressure-guiding sand blower（4）With multiple full-bore pilot sandblastings
Packer（3）；It is characterized in that：Fluid pressure type full-bore huge discharge fracturing technology is through the following steps that realize：
A, first by expansion type fracture packer（5）, pressure-guiding sand blower（4）With multiple full-bore pilot sand-blast packers（3）With
Oil pipe（2）Connect simultaneously tripping in casing（1）Preset depth；
B, ground high pressure liquid is to oil pipe（2）Interior to beat hydraulic pressure, hydraulic pressure passes through full-bore pilot sand-blast packer（3）And pressure-guiding sand blower
（4）Pilot channel, by full-bore pilot sand-blast packer（3）And pressure-guiding sand blower（4）Sand jet outlet generate chock pressure difference, make
Full-bore pilot sand-blast packer（3）And expansion type fracture packer（5）It all sets, realizes target zone packing；
C, continue liquid feeding pressure and pressing crack construction is directly carried out to first layer；
D, hydraulic pressure is improved again, and highly pressurised liquid enters second layer full-bore pilot sand-blast packer（3）Ball seat pilot channel, makes second
Layer full-bore pilot sand-blast packer（3）Middle reducing ring（6）It shrinks, carrying out pitching skidding set for second layer pressure break prepares；
E, well head throws pressure break ball, the tripping in second layer, and pressure break ball falls into second layer full-bore pilot sand-blast packer（3）Reducing
Ring（6）Afterwards, hydraulic open second layer full-bore pilot sand-blast packer is improved（3）Sliding sleeve, second layer pressure break channel open, i.e.,
Pressing crack construction can be carried out to the second layer；
F, d-e steps are repeated, third layer is carried out to n-th layer multistage pressure break using same specification pressure break ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610402303.5A CN106089172B (en) | 2016-06-08 | 2016-06-08 | Hydraulic full-bore large-displacement fracturing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610402303.5A CN106089172B (en) | 2016-06-08 | 2016-06-08 | Hydraulic full-bore large-displacement fracturing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106089172A CN106089172A (en) | 2016-11-09 |
| CN106089172B true CN106089172B (en) | 2018-09-18 |
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| CN201610402303.5A Active CN106089172B (en) | 2016-06-08 | 2016-06-08 | Hydraulic full-bore large-displacement fracturing process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109958422A (en) * | 2019-04-19 | 2019-07-02 | 中国石油天然气股份有限公司 | Blowout prevention and anti-sticking process suitable for large-displacement pressure drive |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852504A (en) * | 2012-09-13 | 2013-01-02 | 中国石油天然气股份有限公司 | Multi-layer fracturing tool string for vertical well immovable pipe column |
| CN104632168A (en) * | 2013-11-15 | 2015-05-20 | 中国石油天然气股份有限公司 | Hydraulic sand-blasting perforation large-displacement fracturing process pipe column and method |
| CN204532322U (en) * | 2015-03-02 | 2015-08-05 | 中国石油化工股份有限公司江汉油田分公司采油工艺研究院 | A kind of horizontal well desirable core sliding sleeve multistage fracturing completion tubular column |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6907936B2 (en) * | 2001-11-19 | 2005-06-21 | Packers Plus Energy Services Inc. | Method and apparatus for wellbore fluid treatment |
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- 2016-06-08 CN CN201610402303.5A patent/CN106089172B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852504A (en) * | 2012-09-13 | 2013-01-02 | 中国石油天然气股份有限公司 | Multi-layer fracturing tool string for vertical well immovable pipe column |
| CN104632168A (en) * | 2013-11-15 | 2015-05-20 | 中国石油天然气股份有限公司 | Hydraulic sand-blasting perforation large-displacement fracturing process pipe column and method |
| CN204532322U (en) * | 2015-03-02 | 2015-08-05 | 中国石油化工股份有限公司江汉油田分公司采油工艺研究院 | A kind of horizontal well desirable core sliding sleeve multistage fracturing completion tubular column |
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| CN106089172A (en) | 2016-11-09 |
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