CN107384360A - A kind of sustained release alkali particle for fracturing outlet liquid reuse and preparation method thereof - Google Patents
A kind of sustained release alkali particle for fracturing outlet liquid reuse and preparation method thereof Download PDFInfo
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- CN107384360A CN107384360A CN201710502801.1A CN201710502801A CN107384360A CN 107384360 A CN107384360 A CN 107384360A CN 201710502801 A CN201710502801 A CN 201710502801A CN 107384360 A CN107384360 A CN 107384360A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
- C09K8/68—Compositions based on water or polar solvents containing organic compounds
- C09K8/685—Compositions based on water or polar solvents containing organic compounds containing cross-linking agents
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/70—Compositions for forming crevices or fractures characterised by their form or by the form of their components, e.g. foams
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/882—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/887—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/90—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
Abstract
A kind of sustained release alkali particle for fracturing outlet liquid reuse, specifically basic matterial is coated with coating material the sustained release alkali particle to be formed, wherein coating material quality accounts for the 15~35% of sustained release alkali granular mass；Described coating material is made up of Instant coating material and slow soluble coating material, and wherein Instant coating material accounts for the 50~70% of coating material mass percent.The preparation method of the described sustained release alkali particle for fracturing outlet liquid reuse, is comprised the following steps that：The screening of basic matterial；The preparation of Instant coating material solution；The preparation of slow soluble coating material solution；Spray coating of basic matterial particle；The secondary spray coating of basic matterial particle.Using the sustained release alkali particle can for plus sand crosslinking the sufficient time is provided, solution, which is returned, is crosslinked too fast, the problems such as adding irregular sand, fracturing fluid low intensity during discharge opeing reuse, is that the recycling of fracturing outlet liquid provides safeguard.Therefore, present invention is generally applicable in the technique of fracturing outlet liquid Treatment for Reuse.
Description
Technical field
The present invention relates to a kind of sustained release alkali particle for fracturing outlet liquid reuse and preparation method thereof, belong to oilfield chemistry
And field of oil development.
Background technology
With the exploitation of unconventional petroleum resources, MHF construction is more and more, not only consumes a large amount of clear water, and
And generate a large amount of fracturing outlet liquids.Due to fracturing outlet liquid complicated component, there is higher viscosity, COD, contain substantial amounts of original
The polluters such as oil, suspension, it has also become influence the major issue of untraditional reservoir exploitation.Used after fracturing outlet liquid is handled
In pressure break again, can not only solve the environmental problem for influenceing pressing crack construction, and clear water resource can be saved, it has also become at present
The development trend of fracturing outlet liquid processing.
Presently used fracturing fluid system is mainly guar gum cross-linking type fracturing fluid, and it, which returns the treatment for reuse method of discharge opeing, is, first
Advanced row purification of water quality, then (prepare guar gum base fluid-tune pH to strong basicity-according to normal fracturing fluid preparation order plus hand over
Connection agent and proppant salt resis-injection) constructed.And at present to the purification of water quality of fracturing fluid, mainly using oxidation,
The techniques such as flocculation, chemical tendering or complexing, for the purpose of removing the scale-forming ions such as crude oil, suspension and calcium and magnesium therein, are not examined
Consider the removal of wherein remaining crosslinker component, water is adjusted base fluid pH according to conventional fracturing fluid formula system after using the purification
During to strong basicity, due to a large amount of guar gums and remaining crosslinking agent in base fluid simultaneously be present, therefore cross-linking reaction shape in advance can occur
Into frozen glue, when carrying out follow-up crosslinking plus sand again, uniform fracturing fluid system can not be formed, often results in the sand in injection process
It is stifled, influence fracturing transformation effect.
Although having some processing methods to crosslinking agent in sewage, such as chemical precipitation method, ion-exchange, hyperfiltration,
It is low and the problems such as influence fracturing fluid property due to removing the Treatment of Sludge brought of technique in itself, producing water ratio, not only it is difficult to hand over
Join the high-efficiency and economic processing of agent, and there is also the problem of waste crosslinking agent resource.
According to appropriate method, both solve to be crosslinked and add the irregular problem of sand, utilize remaining crosslinking agent again, have important
Practical significance.When returning discharge opeing progress fracturing fluid preparation after using purification of water quality, pH adjusting agent is not added with, and is added in follow-up crosslinking
PH adjusting agent is added during sand again, can be solved the above problems.But the pH adjusting agent now added, it is impossible to adjusted using existing fracturing fluid pH
Agent is saved, such as：Sodium hydroxide, sodium carbonate.Alkaline whole release times of current sodium hydroxide and carbonic acid sodium form pH adjusting agent are low
In 20s, when crosslinking agent in solution be present, too fast alkalescence release causes partial cross-linking too fast, can not complete to add sand, it is impossible to shape
Into the fracturing fluid system of high intensity.
Therefore, there is an urgent need to contain remaining crosslinking agent according to fracturing outlet liquid the characteristics of and pressing crack construction requirement, are developed a kind of
It is sustained alkaline pH adjusting agent.The pH adjusting agent should have certain slow releasing function, and its alkalescence release time completely should be in 30-
300s, the time required to crosslinking is well mixed when both meeting to add sand (20-40s), and can realizes complete hand over when fracturing fluid reaches shaft bottom
Connection, reaches fracturing fluid gel intensity requirement, meets different temperatures oil reservoir fracturing fluid property requirement.
The content of the invention
The present invention is for deficiency present in existing fracturing outlet liquid reuse technology, there is provided one kind is used for fracturing outlet liquid
Sustained release alkali particle of reuse and preparation method thereof, it can be using the particle plus sand crosslinking improves the sufficient time, discharge opeing is returned in solution
Too fast, the problems such as adding irregular sand, fracturing fluid low intensity is crosslinked during reuse, guarantor is provided for the recycling of fracturing outlet liquid
Barrier.
The invention provides a kind of sustained release alkali particle for fracturing outlet liquid reuse, specifically with coating material alkalescence
Material is coated the sustained release alkali particle to be formed, and wherein coating material quality accounts for the 15~35% of sustained release alkali granular mass.
Heretofore described coating material is made up of Instant coating material and slow soluble coating material, wherein Instant
Coating material accounts for the 50~70% of coating material mass percent.
Heretofore described Instant coating material is cold water soluble PVA (polyvinyl alcohol), and the PVA degree of polymerization is
600~800, alcoholysis degree is 87~88%.
Heretofore described slow soluble coating material is HPMC (hydroxypropyl level methylcellulose) or PVP (polyvinyl pyrroles
Alkanone), HPMC molecular weight is that 12~150,000, PVP molecular weight is 27~400,000.
Heretofore described basic matterial is the sodium carbonate of technical grade or the potassium carbonate of technical grade.
Present invention also offers a kind of preparation method of the sustained release alkali particle for fracturing outlet liquid reuse, specifically with bag
The method that sustained release alkali particle is made in basic matterial coating by clothing material, this method comprise the following steps that：
(1) screening of basic matterial
Basic matterial is sieved, obtains the basic matterial particle that particle diameter is 0.18~0.2mm.
(2) preparation of Instant coating material solution
Into normal-temperature water, Instant coating material is added, 1~1.5h is stirred under 100~150rpm speed, makes Instant
Coating material is completely dissolved, and it is 10~20% Instant coating material solution to be configured to mass concentration.
(3) preparation of slow soluble coating material solution
Into normal-temperature water, slow soluble coating material is added, 2~2.5h is stirred under 200~300rpm speed, makes slow soluble
Coating material is completely dissolved, and it is 9~12% slow soluble coating material solution to be configured to mass concentration.
(4) spray coating of basic matterial particle
Using continuous fluidized bed spray coating device, using tangent flow spray pattern, atomisation pressure 0.2~
0.5MPa, charging rate is that Instant coating material solution is sprayed into fluidized bed coating room under 200~400g/min, with alkaline material
Expect particle contact, carry out a spray coating, dry after, formed once be coated after basic matterial particle.
The feed rate of described basic matterial is 200~300g/min, the intake velocity of fluidized bed coating room for 3~
4m3/ min, EAT are 60~65 DEG C.
(5) the secondary spray coating of basic matterial particle
Using continuous fluidized bed spray coating device, using tangent flow spray pattern, atomisation pressure 0.5~
1.0MPa, charging rate is that slow soluble coating material solution is sprayed into fluidized bed coating room under 100~200g/min, with above-mentioned one
Basic matterial particle contact after secondary coating, carries out secondary coating, after drying, obtains the sustained release alkali particle of the present invention.
It is described be once coated after the feed rate of basic matterial particle be 100~200g/min, fluidized bed coating room
Intake velocity is 5~6m3/ min, EAT are 50~55 DEG C.
The principle of the present invention：Ease up the coating material that molten section bar material forms using by Instant, basic matterial is carried out
It is coated twice, Instant material is underwear, and slow soluble material is coat, and the alkalescence release time completely of basic matterial is by not
Double control is carried out with the dissolubility of coating material and the thickness of coating.Alkaline release time completely is molten with delaying in coating material
The ratio of section bar material increases and extended, and extends with the increase of coating material thickness, it can be ensured that meets to be crosslinked needed for pressing crack construction
Time.Coating material used in addition, being dissolved in after water also has certain viscosity, serves the effect of increase fracturing fluid intensity.
The present invention is compared with prior art the invention has the advantages that and beneficial effect：
(1) coating material of the invention has source wide, nontoxic, pollution-free, and preparation technology of the invention is simple, into
This is low；
(2) sustained release alkali particle prepared by the present invention, its alkalescence release time completely is controllable, in 30~300s, solves existing
There is pH adjusting agent alkalescence release time too fast, the problem of fracturing outlet liquid reuse can not be realized, basic, normal, high not equality of temperature can be met
Spend the crosslinking time needed for the construction of oil reservoir fracturing fluid；
(3) the coating material category polymer substance of sustained release alkali particle produced by the present invention, its aqueous solution have certain increasing
Viscous effect, Instant coating material used can also react with crosslinking agent in addition, have and further improve fracturing fluid intensity
Effect, improve fracturing fluid intensity 10~15%.
Brief description of the drawings
Accompanying drawing 1 is technical grade sodium carbonate and sustained release alkali particle A sustained release performance；
Accompanying drawing 2 is technical grade sodium carbonate and sustained release alkali particle B sustained release performance；
Accompanying drawing 3 is technical grade potassium carbonate and sustained release alkali particle C sustained release performance.
Embodiment
The present invention is described in further detail with reference to specific embodiment, and with reference to data.It should be understood that these embodiments
It is of the invention solely for the purpose of illustration, rather than the scope limiting the invention in any way.
Embodiment 1
The sodium carbonate pulvis of technical grade is sieved, obtains the carbonic acid sodium powder for the technical grade that particle diameter is 0.18~0.2mm
Agent.
Into normal-temperature water, the addition degree of polymerization is 600~800, alcoholysis degree is 87~88% Instant coating material PVA,
1h is stirred under 100rpm mixing speeds, is completely dissolved PVA, it is 18.5% Instant coating material PVA to be configured to mass concentration
Solution.
It is 12~150,000 slow soluble HPMC that molecular weight is added into normal-temperature water, stirs 2h under 200rpm mixing speeds, makes
HPMC dissolves, and is configured to the slow soluble coating material HPMC solution that mass concentration is 9.4%.
It is 200g/ in charging rate in atomisation pressure 0.5MPa using continuous fluidized bed tangent line spray coating device
PVA solution is sprayed into fluidized bed coating room under min, contacted with the sodium carbonate pulvis of technical grade, the sodium carbonate pulvis of technical grade enters
Material speed is 300g/min, and the intake velocity of fluidized bed coating room is 4m3/ min, EAT are 60 DEG C, are once sprayed
Coating, after drying, the sodium carbonate powder particles of the technical grade formed after being once coated.
Using continuous fluidized bed tangent flow spray coating device, in atomisation pressure 0.5MPa, charging rate 100g/
HPMC solution is sprayed into fluidized bed coating room under min, contacted with the sodium carbonate powder particles of the technical grade after above-mentioned once coating,
The feed rate of the sodium carbonate powder particles of technical grade after being once coated is 200g/min, and fluidized bed coating room intake velocity is
5m3/ min, EAT are 50 DEG C, carry out secondary coating, after drying, obtain being coated the sustained release alkali particle that film thickness is 10 microns
A.In sustained release alkali particle A, coating material quality accounts for the 15% of sustained release alkali granular mass, and wherein Instant coating material accounts for coating
The 70% of quality of materials percentage.
Sustained release alkali particle A sustained release performance is evaluated, as a result sees Fig. 1, as seen from Figure 1, technical grade sodium carbonate
Alkalescence release time completely be 10~20s, and sustained release alkali particle A alkalescence complete release time reaches in 50~60s, can
Meet the requirement of low-temperature reservoir fracturing fluid crosslinking time.
Embodiment 2
The sodium carbonate pulvis of technical grade is sieved, obtains the carbonic acid sodium powder for the technical grade that particle diameter is 0.18~0.2mm
Agent.
Into normal-temperature water, the addition degree of polymerization is 600~800, alcoholysis degree is 87~88% Instant coating material PVA,
1.2h is stirred under 150rpm mixing speeds, is completely dissolved PVA, it is molten for 17.5% Instant coating material to be configured to mass concentration
Liquid PVA solution.
It is 12~150,000 slow soluble HPMC that molecular weight is added into normal-temperature water, and 2.2h is stirred under 250rpm mixing speeds,
HPMC is dissolved, is configured to the slow soluble coating material Solution H PMC solution that mass concentration is 11.6%.
It is 300g/ in charging rate in atomisation pressure 0.2MPa using continuous fluidized bed tangent line spray coating device
PVA solution is sprayed into fluidized bed coating room under min, contacted with the sodium carbonate pulvis of technical grade, the sodium carbonate pulvis of technical grade enters
Material speed is 250g/min, and the intake velocity of fluidized bed coating room is 3m3/ min, EAT are 62 DEG C, are once sprayed
Coating, after drying, the sodium carbonate powder particles of the technical grade formed after being once coated.
Using continuous fluidized bed tangent flow spray coating device, in atomisation pressure 0.8MPa, charging rate 150g/
HPMC solution is sprayed into fluidized bed coating room under min, contacted with the sodium carbonate powder particles of the technical grade after above-mentioned once coating,
The feed rate of the sodium carbonate powder particles of technical grade after being once coated is 150g/min, and fluidized bed coating room intake velocity is
5.6m3/ min, EAT are 52 DEG C, carry out secondary coating, after drying, obtain being coated the sustained release alkali that film thickness is 20 microns
Grain B.In sustained release alkali particle B, coating material quality accounts for the 26% of sustained release alkali granular mass, and wherein Instant coating material accounts for bag
The 60% of clothing quality of materials percentage.
Sustained release alkali particle B sustained release performance is evaluated, as a result sees Fig. 2, as seen from Figure 2, technical grade sodium carbonate
Alkalescence release time completely be 10~20s, and sustained release alkali particle B alkalescence complete release time reaches in 120~150s,
Medium temperature oil reservoir fracturing fluid crosslinking time requirement can be met.
Embodiment 3
The potassium carbonate pulvis of technical grade is sieved, obtains the potassium carbonate powder for the technical grade that particle diameter is 0.18~0.2mm
Agent.
Into normal-temperature water, the addition degree of polymerization is 600~800, alcoholysis degree is 87~88% Instant coating material PVA,
1.5h is stirred under 120rpm mixing speeds, is completely dissolved PVA, it is molten for 13.5% Instant coating material to be configured to mass concentration
Liquid PVA solution.
It is 27~400,000 slow soluble PVP that molecular weight is added into normal-temperature water, stirs 2.5h under 300rpm mixing speeds, makes
PVP dissolves, and is configured to the slow soluble coating material solution PVP solution that mass concentration is 10.6%.
It is 400g/ in charging rate in atomisation pressure 0.3MPa using continuous fluidized bed tangent line spray coating device
PVA solution is sprayed into fluidized bed coating room under min, contacted with the potassium carbonate pulvis of technical grade, the potassium carbonate pulvis of technical grade enters
Material speed is 200g/min, and the intake velocity of fluidized bed coating room is 3.5m3/ min, EAT are 65 DEG C, are once sprayed
Mist is coated, after drying, the potassium carbonate powder particles of the technical grade formed after being once coated.
Using continuous fluidized bed tangent flow spray coating device, in atomisation pressure 1.0MPa, charging rate 200g/
PVP solution is sprayed into fluidized bed coating room under min, contacted with the potassium carbonate powder particles of the technical grade after above-mentioned once coating,
The feed rate of the potassium carbonate powder particles of technical grade after being once coated is 100g/min, and fluidized bed coating room intake velocity is
6m3/ min, EAT are 55 DEG C, carry out secondary coating, after drying, obtain being coated the sustained release alkali particle that film thickness is 30 microns
C.In sustained release alkali particle C, coating material quality accounts for the 35% of sustained release alkali granular mass, and wherein Instant coating material accounts for coating
The 50% of quality of materials percentage.
Sustained release alkali particle C sustained release performance is evaluated, as a result sees Fig. 3, as seen from Figure 3, technical grade potassium carbonate
Alkalescence release time completely be 10~20s, and sustained release alkali particle C alkalescence complete release time reaches in 240~300s, can
Meet high-temperature oil reservoir fracturing fluid crosslinking time requirement.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (5)
1. a kind of sustained release alkali particle for fracturing outlet liquid reuse, it is characterised in that basic matterial is coated with coating material
The sustained release alkali particle of formation, described coating material quality account for the 15~35% of sustained release alkali granular mass；Wherein, coating material by
Instant coating material and slow soluble coating material composition, wherein Instant coating material accounts for the 50 of coating material mass percent
~70%.
2. the sustained release alkali particle according to claim 1 for fracturing outlet liquid reuse, it is characterised in that described is instant
Type coating material be cold water solubles type PVA, PVA the degree of polymerization be 600~800, alcoholysis degree be 87~88%.
3. the sustained release alkali particle according to claim 1 or 2 for fracturing outlet liquid reuse, it is characterised in that described
Slow soluble coating material is HPMC or PVP, HPMC molecular weight are that 12~150,000, PVP molecular weight is 27~400,000.
4. the sustained release alkali particle according to claim 1 or 2 for fracturing outlet liquid reuse, it is characterised in that described
Basic matterial is the sodium carbonate of technical grade or the potassium carbonate of technical grade.
A kind of 5. preparation method of sustained release alkali particle for fracturing outlet liquid reuse, it is characterised in that described preparation method
Comprise the following steps that：
(1) screening of basic matterial
Basic matterial is sieved, obtains the basic matterial particle that particle diameter is 0.18~0.2mm；
(2) preparation of Instant coating material solution
Into normal-temperature water, Instant coating material is added, 1~1.5h is stirred under 100~150rpm speed, is coated Instant
Material is completely dissolved, and it is 10~20% Instant coating material solution to be configured to mass concentration；
(3) preparation of slow soluble coating material solution
Into normal-temperature water, slow soluble coating material is added, 2~2.5h is stirred under 200~300rpm speed, is coated slow soluble
Material is completely dissolved, and it is 9~12% slow soluble coating material solution to be configured to mass concentration；
(4) spray coating of basic matterial particle
Using continuous fluidized bed spray coating device, using tangent flow spray pattern, in 0.2~0.5MPa of atomisation pressure, enter
It is that Instant coating material solution is sprayed into fluidized bed coating room under 200~400g/min to expect speed, is connect with basic matterial particle
Touch, the feed rate of basic matterial is 200~300g/min, and the intake velocity of fluidized bed coating room is 3~4m3/ min, air intake
Temperature be 60~65 DEG C, carry out a spray coating, dry after, formed once be coated after basic matterial particle；
(5) the secondary spray coating of basic matterial particle
Using continuous fluidized bed spray coating device, using tangent flow spray pattern, in 0.5~1.0MPa of atomisation pressure, enter
It is that slow soluble coating material solution is sprayed into fluidized bed coating room under 100g~200g/min to expect speed, after above-mentioned once coating
The contact of basic matterial particle, the feed rate of the basic matterial particle after being once coated is 100~200g/min, fluid bed bag
Dressing Room intake velocity is 5~6m3/ min, EAT are 50~55 DEG C, carry out secondary coating, after drying, obtain the present invention's
Sustained release alkali particle.
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| CN201710502801.1A CN107384360A (en) | 2017-06-27 | 2017-06-27 | A kind of sustained release alkali particle for fracturing outlet liquid reuse and preparation method thereof |
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|---|---|---|---|
| CN201710502801.1A CN107384360A (en) | 2017-06-27 | 2017-06-27 | A kind of sustained release alkali particle for fracturing outlet liquid reuse and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536178A (en) * | 2011-12-27 | 2012-07-04 | 中国石油天然气股份有限公司 | Method for prolonging augmented injection measure period of water injection well scaling easily |
| CN102690645A (en) * | 2012-06-08 | 2012-09-26 | 中国海洋石油总公司 | Sustained-release gel-breaking type fracturing propping agent and preparation method thereof |
| CN103422844A (en) * | 2012-05-15 | 2013-12-04 | 中国石油天然气股份有限公司 | Slow release breaking method for surfactant fracturing fluids |
| CN104804718A (en) * | 2015-05-04 | 2015-07-29 | 中国石油集团渤海钻探工程有限公司 | Sustained-release solid acid for water injection wells in oil fields, and preparation method of sustained-release solid acid |
-
2017
- 2017-06-27 CN CN201710502801.1A patent/CN107384360A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536178A (en) * | 2011-12-27 | 2012-07-04 | 中国石油天然气股份有限公司 | Method for prolonging augmented injection measure period of water injection well scaling easily |
| CN103422844A (en) * | 2012-05-15 | 2013-12-04 | 中国石油天然气股份有限公司 | Slow release breaking method for surfactant fracturing fluids |
| CN102690645A (en) * | 2012-06-08 | 2012-09-26 | 中国海洋石油总公司 | Sustained-release gel-breaking type fracturing propping agent and preparation method thereof |
| CN104804718A (en) * | 2015-05-04 | 2015-07-29 | 中国石油集团渤海钻探工程有限公司 | Sustained-release solid acid for water injection wells in oil fields, and preparation method of sustained-release solid acid |
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Application publication date: 20171124 |