CN110388196A - A kind of straight inclined shaft oriented branch guiding fracturing process - Google Patents
A kind of straight inclined shaft oriented branch guiding fracturing process Download PDFInfo
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- CN110388196A CN110388196A CN201810356828.9A CN201810356828A CN110388196A CN 110388196 A CN110388196 A CN 110388196A CN 201810356828 A CN201810356828 A CN 201810356828A CN 110388196 A CN110388196 A CN 110388196A
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 230000008569 process Effects 0.000 title claims abstract description 24
- 238000005336 cracking Methods 0.000 claims abstract description 17
- 239000004576 sand Substances 0.000 claims description 58
- 239000012530 fluid Substances 0.000 claims description 15
- 241000209094 Oryza Species 0.000 claims description 12
- 235000007164 Oryza sativa Nutrition 0.000 claims description 12
- 239000006187 pill Substances 0.000 claims description 12
- 235000009566 rice Nutrition 0.000 claims description 12
- 238000005086 pumping Methods 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 5
- 238000012856 packing Methods 0.000 claims description 5
- 238000000638 solvent extraction Methods 0.000 claims description 2
- 239000003129 oil well Substances 0.000 abstract description 4
- 206010017076 Fracture Diseases 0.000 description 34
- 208000010392 Bone Fractures Diseases 0.000 description 31
- 238000004519 manufacturing process Methods 0.000 description 8
- 230000035699 permeability Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 208000013201 Stress fracture Diseases 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
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- 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)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The present invention provides a kind of straight inclined shaft oriented branch guiding fracturing process comprising following steps: (1) pit shaft being divided several operating units, each operating unit is divided into two parts up and down；(2) two parts above and below operating unit are subjected to eyelet fracturing work respectively, part is symmetrical along minimum principal stress direction with the azimuth of the eyelet partially formed under operating unit on operating unit；(3) it repeats step (2) to operate each operating unit, until completing the operation of purpose reservoir all operationss unit；(4) closing well, drain.This method ultimately forms based on two major fractures, and the Fracture Systems of a plurality of chicken-wire cracking composition, first mate improves oil well and volume is transformed, and improves oil well productivity.
Description
Technical field
The invention belongs to production gas technology fields of recovering the oil, and in particular to be oriented to fracturing process to a kind of straight inclined shaft oriented branch.
Background technique
Petroleum resources are one of the important energy sources that people depend on for existence for many years, and with the development of economy, demand is increasingly
Increase, the exploitation of petroleum resources is also increasingly valued by people.In recent years, further adding with petrol resources exploitation
Greatly, hypotonic, special low permeability oil field increases year by year in new proved reserves, and therefore, the exploitation of such oil-gas reservoir will become oil gas and increase
The primary position of production.Main Yield-increasing measure of the pressure break as this kind of oil reservoir, is increasingly valued by people.
Fracturing work is that stratum is pressed off crack using high-pressure pump pumping liquid, the liquid for carrying proppant is pumped into, to ground
Liquid is discharged after layer closure, ultimately forms the crack of flow conductivity, increases drainage area, reaches the seepage flow energy for improving reservoir
Power improves the purpose of oil well productivity.The principle of traditional fracturing yield increasing is created on biggest principal stress direction centered on pit shaft
Symmetrical both wings crack, the fluid in reservoir flow to pit shaft by crack by Reservoir Seepage to crack.Effect of increasing production depends primarily on
The quality in crack and the flox condition of reservoir fluid.For many years, fracturing work obtains in conventional low permeability reservoir transformation process
Ideal effect.But gradually decreasing with reservoir permeability, fluid mobility is also gradually deteriorated in layer, conventional to press
Effect is difficult to meet production requirement after splitting transform pattern pressure.Its reason is mainly manifested in, and reservoir matrix percolation ability is poor, with routine
Reservoir establishes identical crack, and as shown in formula (1), production capacity is much smaller than the production capacity of conventional hyposmosis.
K in formula: in-place permeability, D；H: core intersection, m；PR: terminal pressure, Mpa；Pwf: bottom hole flowing pressure, Mpa；
μ, B: fluid viscosity, oil volume factor, mPa.s, zero dimension；Sf: crack skin factor；re, xf: aerial drainage radius, crack half
It is long；CfD: dimensionless fracture conductivity, CfD=KfWf/KXf, wherein KfFor fracture condudtiviy, WfFor slit width.
Therefore, people along two thinkings seek new fracturing process in recent years, and one is length by increasing crack
Drainage area, such as horizontal well multistage subsection pressure break, straight inclined shaft staged fracturing etc.；One is countless by being formed in reservoir
Small crack improves the flox condition of reservoir, such as volume fracturing etc..Although the former theoretically can be improved oil gas well capacity,
But its Seepage problems that not can solve reservoir, therefore rate of oil production is small, and horizontal well multistage subsection pressure break somewhat expensive.Cause
This, the volume fracturing for the purpose of improving flox condition is carried out under the premise of straight well exploitation and solves hypotonic, special hypotonic production capacity bottle
The ideal method of neck.However, to realize that one important condition of volume fracturing is that horizontal maximum principal stress and minimum principal stress are poor
Want small, and China's oil well buries generally relatively deeply, horizontal principal stress difference is bigger than normal, it is hardly formed comprehensive solid netted crack, because
This, straight inclined shaft oriented branch guiding pressure break is the modification measures of more suitable China's reservoir.Horizontal well multistage subsection pressure break+volume pressure
The mode split can obtain preferable effect, but cost problem is still to restrict an important factor for being widely applied.
In conclusion researching and developing the economically viable novel fracturing process of one kind for low permeability and ultra-low permeability reservoirs has very
Important meaning.
Summary of the invention
The present invention is directed to realize special hypotonic, low permeability reservoir effective the economic exploitation, it is therefore an objective to provide economically viable one
The straight inclined shaft oriented branch of kind is oriented to fracturing process.
The purpose of the present invention is achieved through the following technical solutions:
A kind of straight inclined shaft oriented branch guiding fracturing process, comprising the following steps:
(1) pit shaft is divided into several operating units, each operating unit is divided into two parts up and down；
(2) two parts above and below operating unit are carried out eyelet by size and the direction for obtaining purpose reservoir stress field respectively
Fracturing work, part is with the azimuth of the eyelet partially formed under operating unit along minimum principal stress direction pair on operating unit
Claim；
(3) it repeats step (2) to operate each operating unit, until completing the work of purpose reservoir all operationss unit
Industry；
(4) closing well, drain.
The purpose of the present invention can also be achieved through the following technical solutions:
Above-mentioned straight inclined shaft oriented branch is oriented to fracturing process,
Described in step (1) by pit shaft divide several operating units partitioning standards be reservoir crustal stress situation, well
The injectability that body structure and ground installation can be provided.
Above-mentioned straight inclined shaft oriented branch is oriented to fracturing process,
Eyelet fracturing work described in step (2) using following methods 1., method one of 2.:
Method is 1. specifically: S1: using radial bore or abrasive perforating mode to the upper and bottom section of operating unit
Eyelet operation is carried out respectively；S2: it is insulated using section packer between operating unit；S3: to part under operating unit
It carries out pressure break back-up sand, replace；Again to partially carried out on operating unit pressure break back-up sand, block；S4: pressure is surveyed in termination of pumping；The termination of pumping
Time is greater than fracturing fracture closing time；
Method is 2. specifically: (i) carries out eyelet work to the lower part of operating unit with radial bore or abrasive perforating mode
Industry, then carry out pressure break back-up sand, replacement, bridge plug packing；(ii) then with radial bore or abrasive perforating mode to operating unit
Upper part carries out eyelet operation, then carries out pressure break back-up sand, replacement, bridge plug packing.
Method 1. with method 2. described in pressure break back-up sand concrete operations are as follows: huge discharge major fracture viscous pill pressure break, net
Shape crack thin fluid pressure break, chicken-wire cracking add sand, major fracture to add sand: it is single that the huge discharge guarantees that crack extends upwardly to operation
The top of member guarantees that crack extends downward into the lower part of operating unit；The viscous pill viscosity is 300-800mPa；It is described
Thin fluid viscosity be 5-10mpa.s；The chicken-wire cracking adds the proppant partial size of sand to be 40/70 mesh or 30/60 mesh, sand ratio
For 3%-8%；The major fracture adds that the proppant partial size of sand is 30/60 mesh or 20/40 mesh, sand ratio are 5%-50%.It is above-mentioned
Straight inclined shaft oriented branch is oriented to fracturing process,
Partially with the azimuth of Partial cells under operating unit along minimum principal stress on operating unit in the step (2)
Direction is symmetrical；
Partial cells are two rows of opposite eyelets, a round eye direction and minimum principal stress direction under the operating unit
At 55-65 ° of angle, another round eye direction and minimum principal stress are at 235-245 ° of angle；Eyelet aperture 20-50mm；Hole eyelet
Deep 60-80m；The hole perforation density 1-2/rice；
Partial cells are two rows of opposite eyelets, a round eye direction and minimum principal stress direction on the operating unit
At 115-125 ° of angle, another round eye direction and minimum principal stress are at 295-305 ° of angle；Eyelet aperture 20-50mm；Eyelet
Hole depth 60-80m；The hole perforation density 1-2/rice.
Above-mentioned straight inclined shaft oriented branch is oriented to fracturing process, and the operating unit sequence of operation described in step (3) is under
On and.
Target zone is divided into several operating units, operating unit number is by target zone thickness, permeability, porosity and institute
The ability that discharge capacity can be provided determines.
Basic principle of the invention: the extending direction of the size of stress field and direction decision fracturing fracture, crack are vertical
Minimum principal stress direction extends, and eyelet operation is carried out on the direction angled with minimum horizontal principal stress, is ultimately formed
One lines up the double-vane eyelet of plane 180 degree angle, by the inducing action of eyelet, is formed along eyelet direction and maximum principal stress
The double-vane crack to form an angle carries out seam network pressure on this basis and splits, forms splitting for a symmetrical major fracture+chicken-wire cracking
Seam system, same principle can also form symmetrical major fracture+netted in the identical angle in the other side of minimum horizontal principal stress
The Fracture Systems in crack, it is contemplated that two major fracture extensions interfere with each other in the same plane, and two Fracture Systems are put respectively
In upper and lower two parts, two parts up and down are linked up with huge discharge when making major fracture, are ultimately formed using two intersection major fractures as trunk,
Countless chicken-wire crackings are collateral Fracture Systems.
Compared with the prior art, the advantages of the present invention are as follows: change the direction of major fracture using eyelet inducing action, makes ground
Layer reaches the condition for generating two major fractures, extrudes chicken-wire cracking on the basis of major fracture, greatly improves transformation volume, part
Ground solves the constraint of horizontal principal stress fracture direction limitation.
Detailed description of the invention
Fig. 1 is that the crack that a kind of straight inclined shaft oriented branch guiding fracturing process that the embodiment of the present invention 1 provides is formed is overlooked
Figure；
Wherein 21: Partial cells on operating unit；22: Partial cells under operating unit；23: pit shaft；24: Fracture Systems.
Specific embodiment
In the following, the invention will be further described in conjunction with the accompanying drawings and embodiments.
A kind of straight inclined shaft oriented branch of embodiment 1 is oriented to fracturing process
The following steps are included: being illustrated in conjunction with Fig. 1:
(1) injectability that can be provided according to reservoir stress situation, casing programme and ground installation, by pit shaft (in Fig. 1
Shown in 23) 2 operating units are divided, each operating unit is divided into two parts up and down；
(2) size and the direction for obtaining purpose reservoir stress field, using radial bore to the upper part of operating unit and
Lower part carries out eyelet operation respectively；Then it is insulated using section packer between operating unit；To under operating unit
Part carries out pressure break back-up sand, replaces；Again to partially carried out on operating unit pressure break back-up sand, block；Termination of pumping to fracturing fracture be closed,
Survey pressure；
Wherein, pressure break back-up sand step are as follows: huge discharge major fracture viscous pill pressure break, netted is split chicken-wire cracking thin fluid pressure break
Seam plus sand, major fracture add sand: the huge discharge 5.5m3/ min guarantees that crack extends upwardly to top or the guarantee of operating unit
Crack extends downward into the lower part of operating unit；The viscous pill is glue, and viscosity is 300mPa.s (under reservoir temperature
170s-12 hours viscosity is sheared under shear rate and is greater than 50mpa.s)；The thin fluid is slippery water, viscosity 7mpa.s；Institute
The chicken-wire cracking stated adds that the proppant partial size of sand is 40/70 mesh, sand ratio is 5%；The major fracture adds the proppant partial size of sand
It is 25% for 20/40 mesh, sand ratio.
Wherein, on operating unit part with the eyelet azimuth that is partially formed under operating unit along minimum principal stress direction pair
Claim；Partial cells (in Fig. 1 shown in 22) are two rows of opposite eyelets, a round eye direction and minimum master under the operating unit
Stress direction is at 60 ° of angles, another round eye direction and minimum principal stress at 240 ° of angles；Eyelet aperture 40mm；Eyelet hole depth
70m；1 hole of perforation density/rice；Partial cells are two rows of opposite eyelets (in Fig. 1 shown in 21), a row on the operating unit
Eyelet direction is with minimum principal stress direction at 120 ° of angles, another round eye direction and minimum principal stress at 300 ° of angle hole eyelets
Diameter 40mm；Eyelet hole depth 70m；1 hole of perforation density/rice；
(3) step (2) are repeated to operate each operating unit, completes purpose reservoir all operationss unit from bottom to top
Operation；
(4) closing well, drain.From figure 1 it appears that being ultimately formed after pressure break using two intersection major fractures as trunk, nothing
Number chicken-wire cracking is collateral Fracture Systems (in Fig. 1 shown in 24).
A kind of straight inclined shaft oriented branch of embodiment 2 is oriented to fracturing process
The following steps are included:
(1) injectability that can be provided according to reservoir stress situation, casing programme and ground installation draws purpose reservoir
Divide several 3 operating units, each operating unit is divided into two parts up and down；
(2) size and the direction for obtaining purpose reservoir stress field, using abrasive perforating mode to the top of operating unit
Divide and lower part carries out eyelet operation respectively；Then it is insulated using section packer between operating unit；It is single to operation
The lower part of member carries out pressure break back-up sand, replaces；Again to partially carried out on operating unit pressure break back-up sand, block；Termination of pumping is to fracturing fracture
Closure surveys pressure；
Wherein, pressure break back-up sand step are as follows: huge discharge major fracture viscous pill pressure break, netted is split chicken-wire cracking thin fluid pressure break
Seam plus sand, major fracture add sand: the huge discharge 7m3/ min guarantees that crack extends upwardly to the top of operating unit or guarantee is split
Seam extends downward into the lower part of operating unit；The viscous pill is glue, and viscosity is 300mPa.s (under reservoir temperature
170s-12 hours viscosity is sheared under shear rate and is greater than 50mpa.s)；The thin fluid is slippery water, viscosity 5mpa.s；Institute
The chicken-wire cracking stated adds that the proppant partial size of sand is 30/60 mesh, sand ratio is 3%；The major fracture adds the proppant partial size of sand
It is 50% for 30/60 mesh, sand ratio.
Wherein, on operating unit part with the eyelet azimuth that is partially formed under operating unit along minimum principal stress direction pair
Claim；Partial cells are two rows of opposite eyelets under the operating unit, and a round eye direction and minimum principal stress direction are at 55 °
Angle, another round eye direction and minimum principal stress are at 235 ° of angles；Eyelet aperture 20mm；Eyelet hole depth 60m；Perforation density 2
Hole/rice；On the operating unit Partial cells be two rows of opposite eyelets, a round eye direction and minimum principal stress direction at
125 ° of angles, another round eye direction and minimum principal stress are at 305 ° of angle eyelet aperture 20mm；Eyelet hole depth 60m；Eyelet is close
Spend 2 holes/rice；
(3) step (2) are repeated to operate each operating unit, completes purpose reservoir all operationss unit from bottom to top
Operation；
(4) closing well, drain.
A kind of straight inclined shaft oriented branch of embodiment 3 is oriented to fracturing process
The following steps are included:
(1) injectability that can be provided according to reservoir stress situation, casing programme and ground installation draws purpose reservoir
Divide several 4 operating units, each operating unit is divided into two parts up and down；
(2) size and the direction for obtaining purpose reservoir stress field, using radial bore to the upper part of operating unit and
Lower part carries out eyelet operation respectively；Then it is insulated using section packer between operating unit；To under operating unit
Part carries out pressure break back-up sand, replaces；Again to partially carried out on operating unit pressure break back-up sand, block；Termination of pumping to fracturing fracture be closed,
Survey pressure；
Wherein, pressure break back-up sand step are as follows: huge discharge major fracture viscous pill pressure break, netted is split chicken-wire cracking thin fluid pressure break
Seam plus sand, major fracture add sand: the huge discharge 5m3/ min guarantees that crack extends upwardly to the top of operating unit or guarantee is split
Seam extends downward into the lower part of operating unit；The viscous pill is glue, viscosity 500mPa.s；The thin fluid is to slide
Slip water, viscosity 10mpa.s；The chicken-wire cracking adds that the proppant partial size of sand is 40/70 mesh, sand ratio is 8%；The master
Crack adds that the proppant partial size of sand is 30/60 mesh, sand ratio is 5%.
Wherein, on operating unit part with the eyelet azimuth that is partially formed under operating unit along minimum principal stress direction pair
Claim；Partial cells are two rows of opposite eyelets under the operating unit, and a round eye direction and minimum principal stress direction are at 65 °
Angle, another round eye direction and minimum principal stress are at 245 ° of angles；Eyelet aperture 50mm；Eyelet hole depth 80m；Perforation density 1
Hole/rice；On the operating unit Partial cells be two rows of opposite eyelets, a round eye direction and minimum principal stress direction at
115 ° of angles, another round eye direction and minimum principal stress are at 295 ° of angle eyelet aperture 50mm；Eyelet hole depth 80m；Eyelet is close
Spend 1 hole/rice；
(3) step (2) are repeated to operate each operating unit, completes purpose reservoir all operationss unit from bottom to top
Operation；
(4) closing well, drain.
A kind of straight inclined shaft oriented branch of embodiment 4 is oriented to fracturing process
Difference from embodiment 1 is: step (2) are different,
Specifically: (2) radial bore or abrasive perforating side (i) are used in size and the direction for obtaining purpose reservoir stress field
Formula carries out eyelet operation to the lower part of operating unit, then carries out pressure break back-up sand, replacement, bridge plug packing；(ii) then with radial
Drilling or abrasive perforating mode carry out eyelet operation to the upper part of operating unit, then carry out pressure break back-up sand, replacement, bridge plug envelope
Every；
Wherein, pressure break back-up sand step are as follows: huge discharge major fracture viscous pill pressure break, netted is split chicken-wire cracking thin fluid pressure break
Seam plus sand, major fracture add sand: the huge discharge 6m3/ min guarantees that crack extends upwardly to the top of operating unit or guarantee is split
Seam extends downward into the lower part of operating unit；The viscous pill is glue, viscosity 800mPa.s；The thin fluid is to slide
Slip water, viscosity 7mpa.s；The chicken-wire cracking adds that the proppant partial size of sand is 40/70 mesh, sand ratio is 5%；The master
Crack adds that the proppant partial size of sand is 20/40 mesh, sand ratio is 25%.
Wherein, on operating unit part with the eyelet azimuth that is partially formed under operating unit along minimum principal stress direction pair
Claim；Partial cells are two rows of opposite eyelets under the operating unit, and a round eye direction and minimum principal stress direction are at 60 °
Angle, another round eye direction and minimum principal stress are at 240 ° of angles；Eyelet aperture 40mm；Eyelet hole depth 70m；Perforation density 1
Hole/rice；On the operating unit Partial cells be two rows of opposite eyelets, a round eye direction and minimum principal stress direction at
120 ° of angles, another round eye direction and minimum principal stress are at 300 ° of angle eyelet aperture 40mm；Eyelet hole depth 70m；Eyelet is close
Spend 1 hole/rice；
(3) step (2) are repeated to operate each operating unit, completes purpose reservoir all operationss unit from bottom to top
Operation；
(4) closing well, drain.
Claims (6)
1. a kind of straight inclined shaft oriented branch is oriented to fracturing process, which comprises the following steps:
(1) pit shaft is divided into several operating units, each operating unit is divided into two parts up and down；
(2) two parts above and below operating unit are carried out eyelet pressure break by size and the direction for obtaining purpose reservoir stress field respectively
Operation, part is symmetrical along minimum principal stress direction with the azimuth of the eyelet partially formed under operating unit on operating unit；
(3) it repeats step (2) to operate each operating unit, until completing the operation of purpose reservoir all operationss unit；
(4) closing well, drain.
2. straight inclined shaft oriented branch according to claim 1 is oriented to fracturing process, which is characterized in that
Described in step (1) by pit shaft divide several operating units partitioning standards be reservoir crustal stress situation, well bore knot
The injectability that structure and ground installation can be provided.
3. straight inclined shaft oriented branch according to claim 1 is oriented to fracturing process, which is characterized in that
Eyelet fracturing work described in step (2) using following methods 1., method one of 2.:
Method is 1. specifically: S1: being distinguished using radial bore or abrasive perforating mode the upper and bottom section of operating unit
Carry out eyelet operation；S2: it is insulated using section packer between operating unit；S3: to partially being carried out under operating unit
Pressure break back-up sand replaces；Again to partially carried out on operating unit pressure break back-up sand, block；S4: pressure is surveyed in termination of pumping；The termination of pumping time
Greater than fracturing fracture closing time；
Method is 2. specifically: and (i) carries out eyelet operation to the lower part of operating unit with radial bore or abrasive perforating mode, then
Carry out pressure break back-up sand, replacement, bridge plug packing；(ii) then use radial bore or abrasive perforating mode to the upper part of operating unit
Eyelet operation is carried out, pressure break back-up sand, replacement, bridge plug packing are then carried out.
4. straight inclined shaft oriented branch according to claim 3 is oriented to fracturing process, which is characterized in that
Method 1. with method 2. described in pressure break back-up sand concrete operations are as follows: huge discharge major fracture viscous pill pressure break netted is split
Seam thin fluid pressure break, chicken-wire cracking add sand, major fracture to add sand: the huge discharge guarantees that crack extends upwardly to operating unit
Top guarantees that crack extends downward into the lower part of operating unit；The viscous pill viscosity is 300-800mPa；Described is low
Mucous viscosity is 5-10mpa.s；The chicken-wire cracking adds that the proppant partial size of sand is 40/70 mesh or 30/60 mesh, sand ratio are
3%-8%；The major fracture adds that the proppant partial size of sand is 30/60 mesh or 20/40 mesh, sand ratio are 5%-50%.
5. straight inclined shaft oriented branch according to claim 1 is oriented to fracturing process, which is characterized in that described in step (2)
Operating unit on part it is symmetrical along minimum principal stress direction with the azimuth of Partial cells under operating unit；
Under the operating unit Partial cells be two rows of opposite eyelets, a round eye direction and minimum principal stress direction at
55-65 ° of angle, another round eye direction and minimum principal stress are at 235-245 ° of angle；Eyelet aperture 20-50mm；Eyelet hole depth
60-80m；The hole perforation density 1-2/rice；
On the operating unit Partial cells be two rows of opposite eyelets, a round eye direction and minimum principal stress direction at
115-125 ° of angle, another round eye direction and minimum principal stress are at 295-305 ° of angle；Eyelet aperture 20-50mm；Hole eyelet
Deep 60-80m；The hole perforation density 1-2/rice.
6. straight inclined shaft oriented branch according to claim 1 is oriented to fracturing process, which is characterized in that described in step (3)
The operating unit sequence of operation be from below to up.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114508334A (en) * | 2020-11-17 | 2022-05-17 | 中国石油化工股份有限公司 | Karst cave circular seam channel technology determination method based on three-dimensional ground stress field distribution |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967471A (en) * | 2013-01-29 | 2014-08-06 | 中国石油天然气股份有限公司 | Single-layer multi-seam fracturing technology based on stereoscopic staggered oriented perforating technology |
| CN104329055A (en) * | 2013-07-22 | 2015-02-04 | 郝占元 | Method for exploiting coal bed gas |
| CN104481488A (en) * | 2014-11-12 | 2015-04-01 | 中国石油天然气股份有限公司 | Partial pressure annular pressure control method of plumb shaft coiled tubing sand filling |
| CN104963671A (en) * | 2015-06-17 | 2015-10-07 | 中国石油化工股份有限公司 | Fracturing transformation method of highly-deviated cluster well reservoir |
| CN107842351A (en) * | 2016-09-20 | 2018-03-27 | 中国石油大学(北京) | A kind of anhydrous energization composite fracturing method of liquefied petroleum air carbon dioxide |
-
2018
- 2018-04-19 CN CN201810356828.9A patent/CN110388196B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967471A (en) * | 2013-01-29 | 2014-08-06 | 中国石油天然气股份有限公司 | Single-layer multi-seam fracturing technology based on stereoscopic staggered oriented perforating technology |
| CN104329055A (en) * | 2013-07-22 | 2015-02-04 | 郝占元 | Method for exploiting coal bed gas |
| CN104481488A (en) * | 2014-11-12 | 2015-04-01 | 中国石油天然气股份有限公司 | Partial pressure annular pressure control method of plumb shaft coiled tubing sand filling |
| CN104963671A (en) * | 2015-06-17 | 2015-10-07 | 中国石油化工股份有限公司 | Fracturing transformation method of highly-deviated cluster well reservoir |
| CN107842351A (en) * | 2016-09-20 | 2018-03-27 | 中国石油大学(北京) | A kind of anhydrous energization composite fracturing method of liquefied petroleum air carbon dioxide |
Non-Patent Citations (1)
| Title |
|---|
| 唐梅荣: "定向射孔多缝压裂工艺案例分析", 《中国工程科学》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114508334A (en) * | 2020-11-17 | 2022-05-17 | 中国石油化工股份有限公司 | Karst cave circular seam channel technology determination method based on three-dimensional ground stress field distribution |
| CN114508334B (en) * | 2020-11-17 | 2024-05-31 | 中国石油化工股份有限公司 | Karst cave seam-following communication technology determining method based on three-dimensional ground stress field distribution |
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