CN105482799A - Self-degradable hydraulic fracturing temporary plugging diversion agent and preparation method thereof - Google Patents
Self-degradable hydraulic fracturing temporary plugging diversion agent and preparation method thereof Download PDFInfo
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- CN105482799A CN105482799A CN201510865845.1A CN201510865845A CN105482799A CN 105482799 A CN105482799 A CN 105482799A CN 201510865845 A CN201510865845 A CN 201510865845A CN 105482799 A CN105482799 A CN 105482799A
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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
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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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/5086—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained otherwise than 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
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
- C09K8/665—Compositions based on water or polar solvents containing inorganic compounds
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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
- C09K8/885—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
Abstract
The present invention provides a self-degradable hydraulic fracturing temporary plugging diversion agent comprising the following components by mass: 1-10% of a plasticizer; 0.05-2% of a modifier; 0.05-2% of an accelerator; 1-30% of a density adjusting agent and balance of a self-degradation adhesive, and the self-degradation adhesive is polypropylene carbonate resin. The present invention also provides a preparation method of the self-degradable hydraulic fracturing temporary plugging diversion agent. The self-degradable hydraulic fracturing temporary plugging diversion agent solves the defects in the prior art. The self-degradable hydraulic fracturing temporary plugging diversion agent is low in decomposition temperature and short in decomposition time, and decomposition products may not cause secondary pollution.
Description
Technical field
The present invention relates to a kind of stifled diversion agent temporarily of degraded certainly that can be applicable to oil, gas well waterfrac treatment, and this blocks up the preparation method of diversion agent temporarily, belongs to hydrocarbon-bearing pool yield-increasing technology field.
Background technology
The temporary stall of pressure break is to being add temporary plugging agent in real time in hydraulic fracturing process, stifled established man-made fracture temporarily, forces crack in other direction crack initiation expansions, expands fracturing reform volume, thus open new reservoir and link up more natural fracture, increase drainage volume to improve fracturing reform effect.In this technology, good stifled temporarily material is the key realizing stifled pressure break effectively temporarily.
Pressure break temporarily stifled diversion agent is called for short pressure break temporary plugging agent or pressure break diversion agent again usually.What the most often use has oil soluble pressure break stifled diversion agent and water-soluble pressure break stifled diversion agent two kinds temporarily temporarily.But these two kinds of diversion agents all need to rely on resident fluid to realize de-plugging, and may there is the halfway problem of de-plugging at some reservoirs, its application is restricted.And from degradable material can under formation temperature pressure condition disintegrate, therefore suitability is better.At present, as pressure break temporarily stifled diversion agent be mainly biodegradable material from degradable material, degraded to a certain degree can be there is in it under formation temperature, pressure condition.Due to the difference of material, formation temperature has larger impact to material degradation time and degradation rate.Patent CN101553552A discloses multiple degradation material, comprises polymkeric substance and the multipolymer of rac-Lactide and glycollide.Patent CN103342881A and CN103342879A also describes a kind of synthetic method of lipid degradation material.But the shortcoming that these materials all exist, and decomposition temperature is high, the time is long, and degradation production also may cause secondary pollution to a certain degree to reservoir.
Summary of the invention
The invention provides a kind of from degraded waterfrac treatment stifled diversion agent temporarily, solve deficiency of the prior art.Stifled diversion agent decomposition temperature is low temporarily, the time is short for this pressure break, and degradation production can not cause secondary pollution.
Realizing the technical scheme that above-mentioned purpose of the present invention adopts is:
A kind of from degraded waterfrac treatment stifled diversion agent temporarily, comprise following component, each component and the mass percent shared by each component are: softening agent 1 ~ 10%; Properties-correcting agent 0.05 ~ 2%; Promotor 0.05 ~ 2%; Density adjuster 1 ~ 30%; All the other components are tackiness agent of certainly degrading, and the described tackiness agent of degraded is certainly polypropylene carbonate resin.
Described softening agent is nano-calcium carbonate.
Described properties-correcting agent is one or both in triethanolamine borate, aluminic acid three isopropyl ester.
Described promotor is the one in thanomin, quadrol.
Described density adjuster is the one in Sodium Bromide, sodium-chlor, Repone K, cesium formate.
The present invention additionally provides the above-mentioned preparation method blocking up diversion agent from degraded waterfrac treatment temporarily simultaneously, comprises the following steps:
(1), softening agent, properties-correcting agent, promotor, density adjuster and tackiness agent of certainly degrading is taken by above-mentioned mass ratio, described raw material is added after mixing in kneader by Screw Extrusion, segment, obtain the cylindrical pellet of particle diameter between 0.5 ~ 5mm, processing temperature controls below 160 DEG C;
(2), by cylindrical pellet pour particle into and throw throwing circle in circular knitting machine, obtain the particulate state finished product of different-grain diameter according to size requirements.
Block up temporarily in diversion agent from degraded pressure break in the present invention in the present invention, the described tackiness agent of degraded is certainly polypropylene carbonate resin.There is ester group in polypropylene carbonate resin, be easy to hydrolysis, and the existence of terminal hydroxyl makes it there is the alcoholysis of ester class, be easy at high temperature cause depolymerization degraded, thus there is good self-degradation energy.Described softening agent is nano-calcium carbonate.Nano-calcium carbonate can improve the intensity of product, and due to nano-calcium carbonate particles enough little, the particle entering stratum pore throat can flow out with returning discharge opeing again, can not formation damage.Promotor described in the present invention can be reduced and at high temperature to be degraded required activation energy from degraded tackiness agent, thus reduces its degradation temperature.
Based on above-mentioned condition, the application compared with prior art, has following outstanding effect:
(1) should block up diversion agent degradation temperature temporarily from degraded waterfrac treatment low, under 160 DEG C of conditions, in 24 hours, degradation rate is greater than 50%.
(2) formation secondary pollution can not should be caused after degraded waterfrac treatment temporarily stifled diversion agent degraded.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail, and this embodiment further illustrates of the present invention, instead of limit the scope of the invention.
Described in following examples, the described tackiness agent of degraded is certainly polypropylene carbonate resin.Described softening agent is nano-calcium carbonate.Described properties-correcting agent is one or both in triethanolamine borate, aluminic acid three isopropyl ester.Described promotor is the one in thanomin, quadrol.Described density adjuster is the one in Sodium Bromide, sodium-chlor, Repone K, cesium formate.
Embodiment 1
The preparation method that diversion agent is blocked up in the waterfrac treatment of degraded certainly provided in the present embodiment is temporarily as follows:
Take 2.0% nano-calcium carbonate, 0.1% aluminic acid three isopropyl ester, 0.1% thanomin, 10% sodium-chlor, 87.8% polypropylene carbonate resin in mass ratio.Institute's above-mentioned raw materials is added in kneader, stirring heating 10min at 140 DEG C, by Screw Extrusion after mixing, segment.Obtaining particle diameter is 4mm, and length is the cylindrical pellet of 4mm.Cylindrical pellet is poured while hot into screening after throwing circle 30min in particle throwing circular knitting machine and obtain particulate state finished product.
Embodiment 2
The preparation method that diversion agent is blocked up in the waterfrac treatment of degraded certainly provided in the present embodiment is temporarily as follows:
Take 5.0% nano-calcium carbonate, 1.4% triethanolamine borate and aluminic acid three isopropyl ester mixture, 0.5% quadrol, 5% Repone K, 88.1% polypropylene carbonate resin in mass ratio.Institute's above-mentioned raw materials is added in kneader, stirring heating 10min at 140 DEG C, by Screw Extrusion after mixing, segment.Obtaining particle diameter is 4mm, and length is the cylindrical pellet of 4mm.Cylindrical pellet is poured while hot into screening after throwing circle 30min in particle throwing circular knitting machine and obtain particulate state finished product.
Embodiment 3
The preparation method that diversion agent is blocked up in the waterfrac treatment of degraded certainly provided in the present embodiment is temporarily as follows:
Take 8.0% nano-calcium carbonate, 0.5% triethanolamine borate, 1.5% quadrol, 25% Sodium Bromide, 65% polypropylene carbonate resin in mass ratio.Institute's above-mentioned raw materials is added in kneader, stirring heating 10min at 140 DEG C, by Screw Extrusion after mixing, segment.Obtaining particle diameter is 4mm, and length is the cylindrical pellet of 4mm.Cylindrical pellet is poured while hot into screening after throwing circle 30min in particle throwing circular knitting machine and obtain particulate state finished product.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (6)
1., from a degraded waterfrac treatment stifled diversion agent temporarily, it is characterized in that comprising following component, each component and the mass percent shared by each component are: softening agent 1 ~ 10%; Properties-correcting agent 0.05 ~ 2%; Promotor 0.05 ~ 2%; Density adjuster 1 ~ 30%; All the other components are tackiness agent of certainly degrading, and the described tackiness agent of degraded is certainly polypropylene carbonate resin.
2. according to claim 1 from degraded waterfrac treatment stifled diversion agent temporarily, it is characterized in that: described softening agent is nano-calcium carbonate.
3. according to claim 1 from degraded waterfrac treatment stifled diversion agent temporarily, it is characterized in that: described properties-correcting agent is one or both in triethanolamine borate, aluminic acid three isopropyl ester.
4. according to claim 1 from degraded waterfrac treatment stifled diversion agent temporarily, it is characterized in that: described promotor is the one in thanomin, quadrol.
5. according to claim 1 from degraded waterfrac treatment stifled diversion agent temporarily, it is characterized in that: described density adjuster is the one in Sodium Bromide, sodium-chlor, Repone K, cesium formate.
6. the preparation method blocking up diversion agent from degraded waterfrac treatment temporarily according to claim 1, is characterized in that comprising the following steps:
(1), softening agent, properties-correcting agent, promotor, density adjuster and tackiness agent of certainly degrading is taken by above-mentioned mass ratio, described raw material is added after mixing in kneader by Screw Extrusion, segment, obtain the cylindrical pellet of particle diameter between 0.5 ~ 5mm, processing temperature controls below 160 DEG C;
(2), by cylindrical pellet pour particle into and throw throwing circle in circular knitting machine, obtain the particulate state finished product of different-grain diameter according to size requirements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510865845.1A CN105482799B (en) | 2015-11-30 | 2015-11-30 | It is a kind of temporarily to block up diversion agent and preparation method thereof from degradation hydraulic fracturing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510865845.1A CN105482799B (en) | 2015-11-30 | 2015-11-30 | It is a kind of temporarily to block up diversion agent and preparation method thereof from degradation hydraulic fracturing |
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| CN105482799A true CN105482799A (en) | 2016-04-13 |
| CN105482799B CN105482799B (en) | 2018-09-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111978941A (en) * | 2020-08-28 | 2020-11-24 | 上海浦景化工技术股份有限公司 | Degradable material |
| CN116285922A (en) * | 2021-02-18 | 2023-06-23 | 维欧(天津)能源技术服务股份有限公司 | Composite temporary plugging agent special for steering fracturing and preparation method thereof |
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|---|---|---|---|---|
| CN1267681A (en) * | 1999-03-19 | 2000-09-27 | 北京清大亚太科技研究中心 | Degradeable resin composition and its preparation and application |
| CN101553552A (en) * | 2006-10-24 | 2009-10-07 | 普拉德研究及开发股份有限公司 | Degradable material assisted diversion |
| CN102020984A (en) * | 2009-09-15 | 2011-04-20 | 中国石油天然气股份有限公司 | In-fissure diversion fracturing temporary blocking agent for low-permeability oilfield, and preparation method and application thereof |
| CN103342881A (en) * | 2013-07-26 | 2013-10-09 | 四川川庆井下科技有限公司 | Degradable temporary plugging ball and preparation method thereof |
| CN103930515A (en) * | 2011-11-30 | 2014-07-16 | 哈利伯顿能源服务公司 | Methods for initiating new fractures in completed wellbore having existing fractures present therein |
| CN104039917A (en) * | 2011-11-11 | 2014-09-10 | 普拉德研究及开发股份有限公司 | Hydrolyzable particle compositions, treatment fluids and methods |
| CN104418999A (en) * | 2013-08-20 | 2015-03-18 | 中国石油大学(北京) | Biodegradable copolyester nanometer composite material and temporary plugging agent prepared from biodegradable copolyester nanometer composite material |
| CN104987682A (en) * | 2015-07-13 | 2015-10-21 | 中国石油大学(北京) | Biodegradable resin material applied to oil and gas fields and preparation method for biodegradable resin material |
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2015
- 2015-11-30 CN CN201510865845.1A patent/CN105482799B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1267681A (en) * | 1999-03-19 | 2000-09-27 | 北京清大亚太科技研究中心 | Degradeable resin composition and its preparation and application |
| CN101553552A (en) * | 2006-10-24 | 2009-10-07 | 普拉德研究及开发股份有限公司 | Degradable material assisted diversion |
| CN102020984A (en) * | 2009-09-15 | 2011-04-20 | 中国石油天然气股份有限公司 | In-fissure diversion fracturing temporary blocking agent for low-permeability oilfield, and preparation method and application thereof |
| CN104039917A (en) * | 2011-11-11 | 2014-09-10 | 普拉德研究及开发股份有限公司 | Hydrolyzable particle compositions, treatment fluids and methods |
| CN103930515A (en) * | 2011-11-30 | 2014-07-16 | 哈利伯顿能源服务公司 | Methods for initiating new fractures in completed wellbore having existing fractures present therein |
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| CN104418999A (en) * | 2013-08-20 | 2015-03-18 | 中国石油大学(北京) | Biodegradable copolyester nanometer composite material and temporary plugging agent prepared from biodegradable copolyester nanometer composite material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111978941A (en) * | 2020-08-28 | 2020-11-24 | 上海浦景化工技术股份有限公司 | Degradable material |
| CN111978941B (en) * | 2020-08-28 | 2023-08-15 | 上海浦景化工技术股份有限公司 | Degradable material |
| CN116285922A (en) * | 2021-02-18 | 2023-06-23 | 维欧(天津)能源技术服务股份有限公司 | Composite temporary plugging agent special for steering fracturing and preparation method thereof |
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| CN105482799B (en) | 2018-09-14 |
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Effective date of registration: 20200609 Address after: 710000 room 80202, building 3, North Shajing village, Yanta District, Xi'an City, Shaanxi Province Patentee after: SHAANXI XINGYOU TECHNOLOGY DEVELOPMENT Co.,Ltd. Address before: 430100 University of Caidian District of Hubei city in Wuhan Province Road No. Patentee before: Yangtze University |