CN105986785A - Blended fiber grading filling sand control process method - Google Patents
Blended fiber grading filling sand control process method Download PDFInfo
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- CN105986785A CN105986785A CN201510070801.XA CN201510070801A CN105986785A CN 105986785 A CN105986785 A CN 105986785A CN 201510070801 A CN201510070801 A CN 201510070801A CN 105986785 A CN105986785 A CN 105986785A
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Abstract
The invention discloses a blended fiber grading filling sand control process method. The outer layer, i.e., a near-wellbore zone is filled with small-grain-size gravels of the grain size being 3 to 5 times of the median value of stratum sand granularity; the layer is a sand blocking layer; the middle layer, i.e., a position around a bore hole is filled with a mixed arrangement layer of gravels and chopped fiber, and a sand blocking transition layer, i.e., a sand stabilizing layer is formed; the inner layer, i.e., the annular space of a sieve sleeve is filled with large-grain-size gravels of the grain size being 5 to 6 times of the median value of stratum sand granularity; and an annular sand discharging layer is formed. The method of performing filling sand control by using the gravels of a single grain size in the existing loose sandstone reservoir oil well is changed; the mixing of stratum sand and filling sand is slowed down; and the flow guide capability of a sand blocking barrier is improved. Meanwhile, through the invented chopped fiber subjected to surface treatment, the intensity of the sand blocking barrier around the bore hole is further improved; the damage to the sand blocking barrier caused by the stratum fluid in the position of the bore hole due to a pressure drawdown distribution effect is avoided; and on the basis of ensuring the sand control effect, the liquid yield of the oil well is improved to the maximum degree.
Description
Technical field
The present invention relates to oil industry filling anti-sand technology, specifically a kind of combined filament classification filling anti-sand technique side
Method.
Background technology
The poly-displacement of reservoir oil well of current loose sand oil accumulation note uses single particle size gravel to carry out filling anti-sand, is primarily present following asking
Topic: (1) sees that poly-viscosity of produced liquid in oil well increases, prop-carrying capacity strengthens, and extract draws effect measure and has been further exacerbated by oil well and goes out
Sand, the sand control term of validity shortens；(2) sand control technique the lacking of property of measure owing to taking, causes some oil wells to prevent
After sand, liquid measure is relatively low, it is impossible to realize that extract draws the purpose of effect；(3) near wellbore zone polymer acts on jointly with formation fines etc.,
Cause stratum and the blocking of sand block barrier, cause some oil wells Liquid output to decline to a great extent, have impact on the poly-exploitation effect of note.For
Problem above, it is proposed that combined filament gravel is classified filling anti-sand process, three grades of gravel packing zones that the method is formed,
Improve the sand block intensity of gravel filling sand block barrier, it is achieved that the function of " sand block, steady sand, the sediment outflow " of sand block barrier,
Extend the injection region sand control term of validity, it is ensured that oil well later stage extract in injection region draws the smooth enforcement of effect measure.
Content of the invention
It is an object of the invention to provide a kind of combined filament classification filling anti-sand process, change current loose sand oil
Hiding oil well uses single particle size gravel to carry out the way of filling anti-sand, slow down the mixing of reservoir sand and back-up sand, improves
The flow conductivity of sand block barrier.Meanwhile, surface treated chopped strand, further increases sand block screen around borehole
The intensity of barrier, it is to avoid formation fluid because of " pressure drop funnel effect " destruction to sand block barrier, is ensureing to prevent at borehole
On the basis of sand effect, maximum improves the Liquid output of oil well.
In order to reach above-mentioned purpose, present invention employs following technical scheme, a kind of combined filament classification filling anti-sand technique side
Method, at the small particle gravel that outer layer i.e. near wellbore zone filling particle diameter is formation median grain size 3～5 times, this layer is sand block layer；
Around middle level i.e. borehole, pack gravel and the mixing alignment layer of chopped strand, form sand block transition zone, i.e. steady layer of sand；
In internal layer i.e. screen jacket annular space, filling granularity is about the big particle diameter gravel of formation median grain size 5～6 times, forms ring
Idle discharge layer of sand.
The gravel that particle diameter is 0.3～0.6mm is clamp-oned in described near wellbore zone.
Clamp-on the gravel that particle diameter is 0.425～0.85mm near borehole, be mixed into 1.5-2% and a length of 8.0mm chopped simultaneously
Fiber.
Screen jacket annular gravel pack particle diameter is 0.6～1.18mm.
Around described near wellbore zone, borehole, screen jacket annular space trizonal gravel ratio be 6:3:1.
Compared to prior art, the method have the advantages that
Combined filament classification filling anti-sand process is to note poly-rear sand production for existing in injection region sand control technique
Aggravate, the sand control life shortens, polymer jointly acts on the problems such as blocking sand block layer with formation fines etc. and researches and develops.
The high intensity height flow conductivity sand block barrier set up by this technology, it is ensured that injection region oil well extract draws the smooth of effect measure
Implement.Meanwhile, offshore oilfield is due to the problem in platform service life, and efficient extract is technology commonly used at present equally
Measure, so this technology also can meet the requirement to high intensity sand control barrier for the offshore field extract.Additionally, to loose sand
The common sand proof well of oil reservoir and thick oil thermal extraction may be used without this technology and set up high intensity sand block barrier, improves loose sand oil accumulation
Comprehensive exploitation effect.
Brief description
Fig. 1 is the combined filament of the present invention classification structural representation when filling for the filling anti-sand process.
In figure: the 2nd, internal layer 3 of outer layer the 1st, middle level.
Detailed description of the invention
Detailed description for the present invention and technology contents, coordinate brief description as follows, but accompanying drawing only provide with reference to and says
It bright is used, be not used for being any limitation as the present invention.
Referring to the drawings 1, combined filament classification filling anti-sand process be different-grain diameter gravel is classified be filled near wellbore zone,
With screen jacket annular space around borehole, by arranging the thickness of different-grain diameter gravel, improve the sand block intensity of sand block barrier, real
Show the function of " sand block, steady sand, the sediment outflow " of sand block barrier, extend the injection region sand control term of validity.1. outer layer
By the small particle gravel that particle diameter is formation median grain size 3～5 times, play and filter the work stopping major part reservoir sand and particulate
With；2. it is the sand block transition zone of the chopped strand filling arrangement being mixed in the middle of, further stratum fine particles is filtered
Stopping, the filling bed adding chopped strand is difficult to be blocked by formation fines；3. nexine is to be about reservoir sand granularity by granularity
The big particle diameter gravel of intermediate value 5～6 times, screen casing outer filling arrangement formation ring fills sediment outflow layer in the wellbore, has bigger pore throat
With higher permeability, it can be ensured that the less formation fines of a small amount of particle diameter is discharged with Produced Liquid smoothly, prevents formation fines
Or Extra-fine sand results in blockage in pit shaft, thus realize the function of " sand block, steady sand, sediment outflow ", it can be ensured that oil well carries
Liquid draws the smooth enforcement of effect measure.Clamp-on, near wellbore zone, the gravel that particle diameter is 0.3～0.6mm, at borehole during on-the-spot application
Near clamp-on gravel that particle diameter is 0.425～0.85mm (adding 1.5-2% a length of 8.0mm chopped strand), annular space fills
Filling out particle diameter is 0.6～1.18mm gravel, and ensures that near wellbore zone, borehole, annular space trizonal gravel ratio are 6:
3:1.
Up to the present, on-the-spot accumulative popularization and application 32 well of gravel combined filament classification filling anti-sand process technology.Construction
After well uses many slugs combined filament classification filling anti-sand, oil well liquid measure is by 27.2m3Bring up to 40.43m3, oil mass is by 1.01m3
Bring up to 3.89m3, amplification reaches 40% and 80% respectively, and the longest sand control life has reached 400 days, accumulative increasing oil 1.04
Ten thousand tons, achieve good implementation result, preferably solve the sand control difficult problem that injection region exists.
The foregoing is only presently preferred embodiments of the present invention, be not used to limit the scope of the claims of the present invention, other use this
The equivalence change of bright patent spirit, all should all belong to the scope of the claims of the present invention.
Claims (5)
1. combined filament classification filling anti-sand process, it is characterised in that be stratum at outer layer i.e. near wellbore zone filling particle diameter
The small particle gravel of fineness of sand intermediate value 3～5 times, this layer is sand block layer；
Around intermediate layer i.e. borehole, pack gravel and the mixing alignment layer of chopped strand, form sand block transition zone, i.e. steady layer of sand；
In internal layer i.e. screen jacket annular space, filling granularity is about the big particle diameter gravel of formation median grain size 5～6 times, forms annular space sediment outflow
Layer.
2. a kind of combined filament classification filling anti-sand process according to claim 1, it is characterised in that described nearly well ground
The gravel that particle diameter is 0.3～0.6mm clamp-oned by band.
3. a kind of combined filament classification filling anti-sand process according to claim 1, it is characterised in that near borehole
Clamp-on the gravel that particle diameter is 0.425～0.85mm and be mixed into 1.5-2% and a length of 8.0mm chopped strand simultaneously.
4. a kind of combined filament classification filling anti-sand process according to claim 1, it is characterised in that screen jacket annular space gravel
Stone filling particle diameter is 0.6～1.18mm.
5. a kind of combined filament classification filling anti-sand process according to claim 1, it is characterised in that described nearly well ground
Band, around borehole, screen jacket annular space trizonal gravel ratio be 6:3:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510070801.XA CN105986785A (en) | 2015-02-11 | 2015-02-11 | Blended fiber grading filling sand control process method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510070801.XA CN105986785A (en) | 2015-02-11 | 2015-02-11 | Blended fiber grading filling sand control process method |
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| CN105986785A true CN105986785A (en) | 2016-10-05 |
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| CN201510070801.XA Pending CN105986785A (en) | 2015-02-11 | 2015-02-11 | Blended fiber grading filling sand control process method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107575187A (en) * | 2017-10-09 | 2018-01-12 | 中国石油大学(华东) | A kind of high saturation filling control water anti-sand method of the more slugs of Extra-fine sand reservoir |
| CN108222895A (en) * | 2016-12-14 | 2018-06-29 | 中国石油天然气股份有限公司 | A kind of gravel filling sand prevention method |
| CN108397165A (en) * | 2017-02-08 | 2018-08-14 | 中国石油化工股份有限公司 | A kind of anti-sand method of exploitation via steam injection loose sand heavy crude reservoir |
| CN109296354A (en) * | 2018-10-18 | 2019-02-01 | 中国石油化工股份有限公司 | Reservoir sand partial size calculation method of parameters and system |
| CN110043218A (en) * | 2019-04-04 | 2019-07-23 | 中国石油天然气股份有限公司 | Gravel pack methods |
| CN111577217A (en) * | 2019-02-19 | 2020-08-25 | 中石化石油工程技术服务有限公司 | Filling-free self-adaptive sand prevention process method |
| CN114109315A (en) * | 2021-12-02 | 2022-03-01 | 中国地质大学（武汉） | Oil exploitation method for improving injection and exploitation capacity of reservoir |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108222895A (en) * | 2016-12-14 | 2018-06-29 | 中国石油天然气股份有限公司 | A kind of gravel filling sand prevention method |
| CN108397165A (en) * | 2017-02-08 | 2018-08-14 | 中国石油化工股份有限公司 | A kind of anti-sand method of exploitation via steam injection loose sand heavy crude reservoir |
| CN107575187A (en) * | 2017-10-09 | 2018-01-12 | 中国石油大学(华东) | A kind of high saturation filling control water anti-sand method of the more slugs of Extra-fine sand reservoir |
| CN109296354A (en) * | 2018-10-18 | 2019-02-01 | 中国石油化工股份有限公司 | Reservoir sand partial size calculation method of parameters and system |
| CN111577217A (en) * | 2019-02-19 | 2020-08-25 | 中石化石油工程技术服务有限公司 | Filling-free self-adaptive sand prevention process method |
| CN111577217B (en) * | 2019-02-19 | 2022-04-29 | 中石化石油工程技术服务有限公司 | Filling-free self-adaptive sand prevention process method |
| CN110043218A (en) * | 2019-04-04 | 2019-07-23 | 中国石油天然气股份有限公司 | Gravel pack methods |
| CN114109315A (en) * | 2021-12-02 | 2022-03-01 | 中国地质大学（武汉） | Oil exploitation method for improving injection and exploitation capacity of reservoir |
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