CN106047334A - Method for preparing polyvinyl alcohol fiber degrading agent - Google Patents
Method for preparing polyvinyl alcohol fiber degrading agent Download PDFInfo
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- CN106047334A CN106047334A CN201610359966.3A CN201610359966A CN106047334A CN 106047334 A CN106047334 A CN 106047334A CN 201610359966 A CN201610359966 A CN 201610359966A CN 106047334 A CN106047334 A CN 106047334A
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- hydrochloric acid
- degrading agent
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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
- C09K8/845—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
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- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The invention relates to a method for preparing a polyvinyl alcohol fiber degrading agent. A technical scheme of the polyvinyl alcohol fiber degrading agent refers to: the agent being made from the following components according to parts by weight: 20-30 parts of dimethyl sulfoxide, 40-50 parts of dimethyl formamide, 20-30 parts of solid zinc chloride, 20-50 parts of 35% hydrochloric acid, 1-3 parts of hydrogen peroxide, and 20-40 parts of methanol. The method has the advantages that the prepared degrading agent makes full use of fiber degradation conditions and makes full use of residual chemicals in a fiber operation environment so that the degrading agent exerts secondary action, enabling exertion of waste heat and meeting the environment protection requirement; the degrading agent has good degrading effect to fibers added during fracturing construction, is already applied to industrial production and is already applied to field use.
Description
Technical field
The present invention relates to a kind of degradation agent preparation method, particularly to the degradation agent preparation side of a kind of vinal
Method.
Background technology
First, introduce domestic low-permeability oil deposit routine pressure break present situation: oil field at home low permeability reservoir at present, mainly use pressure
Splitting transformation to improve Oil & Gas Productivity, the total well of pressure break increases year by year, and this measure increases oil and gas production and achieves preferable effect.
However as the carrying out of exploitation, conventional Fracturing Technology exposes some shortcomings.
For preventing conventional Fractured Oil Well from shaking out, proppant backflow etc. phenomenon, improve fracturing effect, domestic carried out a large amount of
Research work, main application fiber SAND FRACTURING TECHNOLOGY.Network of fibers adds sand technique, comes steady by physics rather than chemical action
Determine the proppant in crack, produce superpower suspended and sand carrying and proppant crystallized ability, by stratum by the effect of fiber
The impact of fluid, formation temperature, clossing pressure and closed-in time is less, good with the compatibility of fracturing fluid, can after pressure directly
Drive a well the row of returning, it is achieved discharge opeing quick, efficient, reduces formation damage.Application is carried out in the most multiple oil field of this technique, and takes
Obtain preferable effect, integrated artistic relative maturity.
Next, fiber adds the anti-proppant of sand technology and returns out mechanism: after the load fluid being mixed with fiber is injected crack, by fibre
Proppant particles is wrapped up in dimension winding, pressing crack construction terminate and during crack closure, the proppant in crack because bearing confining pressure,
Mechanical balance is reached so that the form of contact interacts between granule.When returning discharge fracturing fluid, washing away of fluid flowing makes balance be subject to
To destroying, proppant particles generation plasticity shearing deformation, form a series of sand arch structure, make a dish loose sand be rolled into one
Individual entirety.The arch detrusion of discharge opeing process medium sand causes the deformation of fiber, and fiber axial force is decomposed into tangentially, normal direction two parts,
Tangential component encircles detrusion directly against sand, and normal component increases confining pressure, and then increases the frictional force between proppant,
Abut the arch detrusion of anti-sand, thus improve stability and the critical discharge speed of fracturing fluid of sand arch, effectively prevent proppant
Return out.Action principle is as shown in Figure 1.
Finally, fiber adds the degraded of fiber after the row of returning terminates of sand technology: after pressure break returns row, Oil/gas Well enters the operation stage,
When construction, the fiber of companion's note produces inhibition, comparatively speaking because being dispersed in proppant gap the flowing to oil gas
Now fibration is over, and for reaching more preferable yield, it is necessary to by fiber degradation, but existing do not have this technology.
Summary of the invention
The purpose of the present invention is aiming at the drawbacks described above that prior art exists, it is provided that the degraded of a kind of vinal
Agent preparation method, solves the problem that pressure break companion's note fiber can not be degraded in time,
The degradation agent of a kind of vinal that the present invention mentions, is made up of the component reaction of following weight portion:
Dimethyl sulfoxide 20 30 parts, dimethylformamide 40 50 parts, zinc chloride solid 20 30 parts, mass percent concentration
Be 35% hydrochloric acid 20 50 parts, hydrogen peroxide 13 parts, methanol 20-40 part.
The preparation method of the degradation agent of a kind of vinal that the present invention mentions, is realized by following steps:
(1) by 20 30 parts of addition reactors of dimethyl sulfoxide, it is warmed up to 40 DEG C；
(2) dimethylformamide adding 40 50 parts keeps temperature 40 DEG C；
(3) in reactor, add the zinc chloride solid of 20 30 parts；
(4) dripping the hydrochloric acid of 10 20 parts in reactor, the mass percent concentration of described hydrochloric acid is 35%, controls temperature and exists
40℃；
(5) drip the hydrogen peroxide of 13 parts during hydrochloric acid is added dropwise to complete backward above-mentioned solution, after stirring, stop 40 DEG C of guarantors of stirring
Temperature 20 minutes；
(6) continue to add the methanol of 20-40 part in reactor, after stirring, obtain degradation agent.
It addition, the reaction that the degradation agent of the employing present invention and vinal occur is:
。
The invention has the beneficial effects as follows: the degradation agent that the present invention makes takes full advantage of fiber degradation condition, effectively profit
By the residual chemical in fiber working environment so that it is play secondary action, i.e. bring extra power into play, again meet the requirement of environmental protection, this
It is effective that pressing crack construction is added fibration by invention degradation agent, has been applied to industrialized production at present, and has applied
In onsite application.
Accompanying drawing explanation
Accompanying drawing 1 is the sand arch schematic diagram that existing fiber adds sand technology；
Accompanying drawing 2 is the industrial flow chart of the present invention.
Detailed description of the invention
Embodiment 1: combining accompanying drawing 2, the invention will be further described: is made up of following steps:
1, dimethyl sulfoxide 20kg is added in reactor, be warmed up to 40 DEG C；
2, the dimethylformamide (DNF) adding 50kg keeps temperature 40 DEG C；
3, in reactor, add the zinc chloride solid of 30kg, control to add speed at 1kg/min；
4, in reactor, drip the hydrochloric acid (35% concentration) of 20kg, control temperature at 40 DEG C；
5, hydrochloric acid drips the high concentration hydrogen peroxide of 2kg in being added dropwise to complete backward above-mentioned solution, if concentration is the hydrogen peroxide of 80%, stirs
After mixing uniformly, stop stirring 40 DEG C and be incubated 20 minutes；
6, adding 20kg methanol to stir, blowing, sampling is evaluated.
The parameter of the efficient degradation agent obtained according to the present invention is:
Outward appearance: colourless or slightly yellow homogeneous liquid, mechanical impurity
Ph value: 12.
The reaction equation that the present invention uses at synthesis phase:
H2O2+2HCL=2H2O+CL2Then CL2+H2O=HCLO+HCL
I.e. H2O2+HCL=HCLO+H2O
The present invention takes full advantage of fiber at working environment, is adding fashionable by the degradation agent of the present invention, vinal
The reaction occurred with the degradation agent of the present invention is:
。
Embodiment 2: the degradation agent that the present invention mentions is made up of following steps:
1, by dimethyl sulfoxide:: 30kg adds in reactor, is warmed up to 40 DEG C；
2, the dimethylformamide adding 40kg keeps temperature 40 DEG C；
3, in reactor, add the zinc chloride solid of 30kg, control to add speed at 1kg/min；
4, in reactor, drip the hydrochloric acid (35% concentration) of 25kg, control temperature at 40 DEG C；
5, hydrochloric acid drips the high concentration hydrogen peroxide of 3kg in being added dropwise to complete backward above-mentioned solution, if concentration is the hydrogen peroxide of 60%, stirs
After mixing uniformly, stop stirring 40 DEG C and be incubated 20 minutes；
6, adding 30kg methanol to stir, blowing, sampling is evaluated.
The parameter of the efficient degradation agent obtained according to the present invention is:
Outward appearance: colourless or slightly yellow homogeneous liquid, mechanical impurity
Ph value: 12.
The application of the degradation agent of the present invention as described in Example 1, is no longer described in detail.
Embodiment 3:
1, by dimethyl sulfoxide:: 60kg adds in reactor, is warmed up to 40 DEG C；
2, the dimethylformamide adding 90kg keeps temperature 40 DEG C；
3, in reactor, add the zinc chloride solid of 65kg, control to add speed at 1kg/min；
4, in reactor, drip the hydrochloric acid (35% concentration) of 50kg, control temperature at 40 DEG C；
5, hydrochloric acid drips the high concentration hydrogen peroxide of 6kg in being added dropwise to complete backward above-mentioned solution, if concentration is the hydrogen peroxide of 70%, stirs
After mixing uniformly, stop stirring 40 DEG C and be incubated 20 minutes；
6, adding 40kg methanol to stir, wait blowing, blowing, sampling is evaluated.
The parameter of the efficient degradation agent obtained according to the present invention is:
Outward appearance: colourless or slightly yellow homogeneous liquid, mechanical impurity
Ph value: 12
The application of the degradation agent of the present invention as described in Example 1, is no longer described in detail.
In addition, it is necessary to explanation, the high-efficiency fiber degradation agent that said method prepares, reach intended quality index,
Take the different construction of oil gas field block (well site, region, middle petrochemical industry Chuan Xi Luojiang County of gas production factory, well site, Zhong Jiang region, territory, NE Sichuan Yuanba District
Deng) carry out fiber degradation screening experiment and learn, this series products consumption is little, applied widely, good degrading effect, has reached intended
Use standard.
The above, be only the part preferred embodiment of the present invention, and any those of ordinary skill in the art all may profit
Revised or be revised as the technical scheme of equivalent by the technical scheme of above-mentioned elaboration.Therefore, according to the technology of the present invention
Any simple modification that scheme is carried out or substitute equivalents, belong to the greatest extent the scope of protection of present invention.
Claims (3)
1. a degradation agent for vinal, is characterized in that: be made up of the component reaction of following weight portion:
Dimethyl sulfoxide 20 30 parts, dimethylformamide 40 50 parts, zinc chloride solid 20 30 parts, mass percent concentration
Be 35% hydrochloric acid 20 50 parts, hydrogen peroxide 13 parts, methanol 20-40 part.
2. a preparation method for the degradation agent of vinal as claimed in claim 1, is characterized in that by following steps
Realize:
(1) by 20 30 parts of addition reactors of dimethyl sulfoxide, it is warmed up to 40 DEG C；
(2) dimethylformamide adding 40 50 parts keeps temperature 40 DEG C；
(3) in reactor, add the zinc chloride solid of 20 30 parts；
(4) dripping the hydrochloric acid of 10 20 parts in reactor, the mass percent concentration of described hydrochloric acid is 35%, controls temperature and exists
40℃；
(5) drip the hydrogen peroxide of 13 parts during hydrochloric acid is added dropwise to complete backward above-mentioned solution, after stirring, stop 40 DEG C of guarantors of stirring
Temperature 20 minutes；
(6) continue to add the methanol of 20-40 part in reactor, after stirring, obtain degradation agent.
The degradation agent preparation method of vinal the most according to claim 2, is characterized in that: use the fall of the present invention
The reaction that solution agent and vinal occur is:
。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610359966.3A CN106047334A (en) | 2016-05-27 | 2016-05-27 | Method for preparing polyvinyl alcohol fiber degrading agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610359966.3A CN106047334A (en) | 2016-05-27 | 2016-05-27 | Method for preparing polyvinyl alcohol fiber degrading agent |
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| Publication Number | Publication Date |
|---|---|
| CN106047334A true CN106047334A (en) | 2016-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610359966.3A Pending CN106047334A (en) | 2016-05-27 | 2016-05-27 | Method for preparing polyvinyl alcohol fiber degrading agent |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113981564A (en) * | 2021-11-15 | 2022-01-28 | 中国石油大学(北京) | Sand-carrying fiber and preparation and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5067566A (en) * | 1991-01-14 | 1991-11-26 | Bj Services Company | Low temperature degradation of galactomannans |
| CN102031572A (en) * | 2009-09-30 | 2011-04-27 | 中国石油化工集团公司 | Preparation technique of water-soluble polyvinyl alcohol fiber and application thereof |
| CN102250601A (en) * | 2011-05-06 | 2011-11-23 | 河北科技大学 | Composite blocking remover for oil well and application method thereof |
| CN102746838A (en) * | 2011-04-22 | 2012-10-24 | 中国石油天然气股份有限公司 | Blocking remover for gas well shaft |
-
2016
- 2016-05-27 CN CN201610359966.3A patent/CN106047334A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5067566A (en) * | 1991-01-14 | 1991-11-26 | Bj Services Company | Low temperature degradation of galactomannans |
| CN102031572A (en) * | 2009-09-30 | 2011-04-27 | 中国石油化工集团公司 | Preparation technique of water-soluble polyvinyl alcohol fiber and application thereof |
| CN102746838A (en) * | 2011-04-22 | 2012-10-24 | 中国石油天然气股份有限公司 | Blocking remover for gas well shaft |
| CN102250601A (en) * | 2011-05-06 | 2011-11-23 | 河北科技大学 | Composite blocking remover for oil well and application method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 单巨川: "双氧水/活化剂对PVA的降解作用", 《棉纺织技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113981564A (en) * | 2021-11-15 | 2022-01-28 | 中国石油大学(北京) | Sand-carrying fiber and preparation and application thereof |
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Application publication date: 20161026 |
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