CN105349128A - Temporary plugging agent for acidifying and fracturing - Google Patents
Temporary plugging agent for acidifying and fracturing Download PDFInfo
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- CN105349128A CN105349128A CN201510766840.3A CN201510766840A CN105349128A CN 105349128 A CN105349128 A CN 105349128A CN 201510766840 A CN201510766840 A CN 201510766840A CN 105349128 A CN105349128 A CN 105349128A
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- plugging agent
- temporary plugging
- acid fracturing
- preparation
- acidifying
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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
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- General Life Sciences & Earth Sciences (AREA)
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- Organic Chemistry (AREA)
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
The invention relates to a temporary plugging agent for acidifying and fracturing, and belongs to the technical field of oilfield chemical. The temporary plugging agent is prepared by the steps: adding polyols, o-phthalic anhydride and a catalyst into a reaction kettle, introducing CO2 to make the reaction kettle full of CO2, slowly stirring, and after the temperature rises to 180 DEG C, keeping constant temperature for 1 h; continuing to heat up to 200-220 DEG C, keeping constant temperature for 2 h, and carrying out sampling test, wherein when the shearing speed is 170 s<-1>, a reaction end point is determined at the viscosity of 10 mPa*s; and after the end point is reached, stopping heating, cooling, then adding xylene, stirring evenly, filtering, and thus obtaining the product. According to the temporary plugging agent for acidifying and fracturing and a preparation method thereof, the temporary plugging agent for acidifying and fracturing has good dispersibility, has good compatibility with a carrier fluid, can be completely dissolved after construction is finished, is non-toxic, and is safe and quick for construction; and the preparation method of the temporary plugging agent for acidifying and fracturing is simple in process, low in cost and high in synthetic efficiency.
Description
Technical field
The present invention relates to a kind of acid fracturing temporary plugging agent, belong to technical field of oilfield chemistry.
Background technology
Acid fracturing is the widely used increasing yield and injection measure in domestic and international oil field, has now become important completion means.But due to nonuniformity, the reservoir damage degree difference of reservoir, a large amount of leak-off of acid solution in acid fracturing process, the operating distance of acid solution diminishes, and is difficult to the uniform acid distribution realizing construction well section.The acid solution of current use turns to technique to be mainly divided into mechanical steering and chemistry diversion.But mechanical steering work operations amount is large, and working cycle is long, costly.In chemistry diversion technology, high polymer reservoir damage is large, is difficult to realize deep acidizing.
But existing acid fracturing temporary plugging agent bad dispersibility, temporary plugging agent and transport fluid do not have good compatibleness, can not dissolve completely after construction terminates, its preparation method of acid fracturing temporary plugging agent, complex process, and cost is high, and combined coefficient is low.
Summary of the invention
The object of this invention is to provide a kind of acid fracturing temporary plugging agent, acid fracturing temporary plugging agent good dispersity, temporary plugging agent and transport fluid have good compatibleness, can dissolve completely after construction terminates, nontoxic, construction safety is quick, the its preparation method of acid fracturing temporary plugging agent, technique is simple, and cost is low, and combined coefficient is high.
The technical solution adopted in the present invention is:
A kind of acid fracturing temporary plugging agent, its composition and content are:
Polyvalent alcohol 48.3-53.5wt%
Phthalic anhydride 41.2-48.3wt%
Catalyzer 0.74-1.2wt%
Dimethylbenzene 2.4-4.1wt%
A preparation method for acid fracturing temporary plugging agent, comprises the following steps:
(1) 48.3-53.5wt% polyvalent alcohol and 41.2-48.3wt% phthalic anhydride are added in reactor, then add 0.74-1.2wt% catalyzer, and pass into CO
2, make it be full of reactor, make the content of oxygen in reactor lower than 10g/m3, open and stir, mixing speed is 10-20r/min, then starts heating, after temperature is raised to 180 DEG C, and constant temperature 1 hour.
(2) continue to be warming up to 200-220 DEG C, constant temperature 2 hours, every sample testing half an hour, at shearing rate 170s
-1time, viscosity 10mPas is reaction end.
(3) after reaching home, stop heating, add 2.4-4.1wt% dimethylbenzene after cooling, stir, filter, obtain product.
Described polyvalent alcohol is at least one in ethylene glycol, propylene glycol, glycerol, butyleneglycol, and catalyzer is at least one in sodium hydroxide, potassium hydroxide, hydrated barta, calcium hydroxide, magnesium hydroxide, ammoniacal liquor.
In described step (1), the flow of carbonic acid gas is 0.2-1m3/h.
In described step (3), after cooling, temperature is 5-25 DEG C, and stirring velocity is 50-300r/min, and churning time is 0.5-2 hour, and the aperture of filtering filtration medium used is 0.1-2um.
Described filtration medium is at least one in filter cloth, filter membrane, ceramic membrane, filter paper.
Beneficial effect of the present invention is: a kind of acid fracturing temporary plugging agent provided by the invention and preparation method thereof, acid fracturing temporary plugging agent good dispersity, temporary plugging agent and transport fluid have good compatibleness, can dissolve completely after construction terminates, nontoxic, construction safety is quick, the its preparation method of acid fracturing temporary plugging agent, technique is simple, and cost is low, and combined coefficient is high.
Embodiment
Below in conjunction with concrete example; a kind of acid fracturing temporary plugging agent described in the present patent application is described and is illustrated; object is in order to the public better understands technology contents of the present invention; instead of the restriction to described technology contents; under identical or approximate principle, to the improvement that described processing step carries out, comprise reaction conditions, agents useful for same improvement and replace; reach identical object, then all within the present patent application technical scheme required for protection.
embodiment one
A kind of acid fracturing temporary plugging agent, its composition and content are:
Polyvalent alcohol 50wt%
Phthalic anhydride 45.8wt%
Catalyzer 1.1wt%
Dimethylbenzene 3.1wt%
A preparation method for acid fracturing temporary plugging agent, comprises the following steps:
(1) 50wt% polyvalent alcohol and 45.8wt% phthalic anhydride are added in reactor, then add 1.1wt% catalyzer, and pass into CO
2, make it be full of reactor, make the content of oxygen in reactor lower than 10g/m3, open and stir, mixing speed is 15r/min, then starts heating, after temperature is raised to 180 DEG C, and constant temperature 1 hour.
(2) continue to be warming up to 210 DEG C, constant temperature 2 hours, every sample testing half an hour, at shearing rate 170s
-1time, viscosity 10mPas is reaction end.
(3) after reaching home, stop heating, add 3.1wt% dimethylbenzene after cooling, stir, filter, obtain product.
Described polyvalent alcohol is ethylene glycol, and catalyzer is sodium hydroxide.
In described step (1), the flow of carbonic acid gas is 0.5m3/h.
In described step (3), after cooling, temperature is 20 DEG C, and stirring velocity is 200r/min, and churning time is 1 hour, and the aperture of filtering filtration medium used is 0.5um.
Described filtration medium is filter cloth.
embodiment two
A kind of acid fracturing temporary plugging agent, its composition and content are:
Polyvalent alcohol 50wt%
Phthalic anhydride 45.8wt%
Catalyzer 1.1wt%
Dimethylbenzene 3.1wt%
A preparation method for acid fracturing temporary plugging agent, comprises the following steps:
(1) 50wt% polyvalent alcohol and 45.8wt% phthalic anhydride are added in reactor, then add 1.1wt% catalyzer, and pass into CO
2, make it be full of reactor, make the content of oxygen in reactor lower than 10g/m3, open and stir, mixing speed is 15r/min, then starts heating, after temperature is raised to 180 DEG C, and constant temperature 1 hour.
(2) continue to be warming up to 205 DEG C, constant temperature 2 hours, every sample testing half an hour, at shearing rate 170s
-1time, viscosity 10mPas is reaction end.
(3) after reaching home, stop heating, add 3.1wt% dimethylbenzene after cooling, stir, filter, obtain product.
Described polyvalent alcohol is propylene glycol, and catalyzer is hydrated barta.
In described step (1), the flow of carbonic acid gas is 0.8m3/h.
In described step (3), after cooling, temperature is 20 DEG C, and stirring velocity is 200r/min, and churning time is 1 hour, and the aperture of filtering filtration medium used is 1um.
Described filtration medium is filter paper.
embodiment three
A kind of acid fracturing temporary plugging agent, its composition and content are:
Polyvalent alcohol 51wt%
Phthalic anhydride 46.5wt%
Catalyzer 1.0wt%
Dimethylbenzene 2.5wt%
A preparation method for acid fracturing temporary plugging agent, comprises the following steps:
(1) 51wt% polyvalent alcohol and 46.5wt% phthalic anhydride are added in reactor, then add 1.0wt% catalyzer, and pass into CO
2, make it be full of reactor, make the content of oxygen in reactor lower than 10g/m3, open and stir, mixing speed is 18r/min, then starts heating, after temperature is raised to 180 DEG C, and constant temperature 1 hour.
(2) continue to be warming up to 220 DEG C, constant temperature 2 hours, every sample testing half an hour, at shearing rate 170s
-1time, viscosity 10mPas is reaction end.
(3) after reaching home, stop heating, add 2.5wt% dimethylbenzene after cooling, stir, filter, obtain product.
Described polyvalent alcohol is butyleneglycol, and catalyzer is magnesium hydroxide.
In described step (1), the flow of carbonic acid gas is 0.9m3/h.
In described step (3), after cooling, temperature is 20 DEG C, and stirring velocity is 300r/min, and churning time is 1.5 hours, and the aperture of filtering filtration medium used is 0.2um.
Described filtration medium is filter membrane.
The present invention is not limited to above-mentioned preferred forms; anyone can draw other various forms of products under enlightenment of the present invention; no matter but any change is done in its shape or structure; every have identical with the application or akin technical scheme, all drops within protection scope of the present invention.
Claims (6)
1. an acid fracturing temporary plugging agent, is characterized in that, its composition and content are:
Polyvalent alcohol 48.3-53.5wt%
Phthalic anhydride 41.2-48.3wt%
Catalyzer 0.74-1.2wt%
Dimethylbenzene 2.4-4.1wt%.
2. a preparation method for acid fracturing temporary plugging agent, is characterized in that, comprises the following steps:
(1) 48.3-53.5wt% polyvalent alcohol and 41.2-48.3wt% phthalic anhydride are added in reactor, then add 0.74-1.2wt% catalyzer, and pass into CO
2, make it be full of reactor, make the content of oxygen in reactor lower than 10g/m3, open and stir, mixing speed is 10-20r/min, then starts heating, after temperature is raised to 180 DEG C, and constant temperature 1 hour;
(2) continue to be warming up to 200-220 DEG C, constant temperature 2 hours, every sample testing half an hour, at shearing rate 170s
-1time, viscosity 10mPas is reaction end;
(3) after reaching home, stop heating, add 2.4-4.1wt% dimethylbenzene after cooling, stir, filter, obtain product.
3. a kind of acid fracturing temporary plugging agent according to claim 1, it is characterized in that: described polyvalent alcohol is at least one in ethylene glycol, propylene glycol, glycerol, butyleneglycol, catalyzer is at least one in sodium hydroxide, potassium hydroxide, hydrated barta, calcium hydroxide, magnesium hydroxide, ammoniacal liquor.
4. the preparation method of a kind of acid fracturing temporary plugging agent according to claim 2, is characterized in that: in described step (1), the flow of carbonic acid gas is 0.2-1m3/h.
5. the preparation method of a kind of acid fracturing temporary plugging agent according to claim 2, it is characterized in that: in described step (3), after cooling, temperature is 5-25 DEG C, stirring velocity is 50-300r/min, and churning time is 0.5-2 hour, and the aperture of filtering filtration medium used is 0.1-2um.
6. the preparation method of a kind of acid fracturing temporary plugging agent according to claim 4, is characterized in that: described filtration medium is at least one in filter cloth, filter membrane, ceramic membrane, filter paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510766840.3A CN105349128A (en) | 2015-11-12 | 2015-11-12 | Temporary plugging agent for acidifying and fracturing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510766840.3A CN105349128A (en) | 2015-11-12 | 2015-11-12 | Temporary plugging agent for acidifying and fracturing |
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| Publication Number | Publication Date |
|---|---|
| CN105349128A true CN105349128A (en) | 2016-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510766840.3A Pending CN105349128A (en) | 2015-11-12 | 2015-11-12 | Temporary plugging agent for acidifying and fracturing |
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| CN (1) | CN105349128A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107382720A (en) * | 2017-07-03 | 2017-11-24 | 西南石油大学 | A kind of heavy crude thinner, preparation method and application |
-
2015
- 2015-11-12 CN CN201510766840.3A patent/CN105349128A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107382720A (en) * | 2017-07-03 | 2017-11-24 | 西南石油大学 | A kind of heavy crude thinner, preparation method and application |
| CN107382720B (en) * | 2017-07-03 | 2020-08-04 | 西南石油大学 | Thick oil viscosity reducer, preparation method and application |
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Application publication date: 20160224 |
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| WD01 | Invention patent application deemed withdrawn after publication |