CN110819335A - Crosslinking agent for recyclable polymer fracturing fluid and preparation method thereof - Google Patents
Crosslinking agent for recyclable polymer fracturing fluid and preparation method thereof Download PDFInfo
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- CN110819335A CN110819335A CN201911171411.6A CN201911171411A CN110819335A CN 110819335 A CN110819335 A CN 110819335A CN 201911171411 A CN201911171411 A CN 201911171411A CN 110819335 A CN110819335 A CN 110819335A
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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
- C09K8/84—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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Abstract
The invention relates to the technical field of chemical additives for petroleum exploitation, and particularly relates to a cross-linking agent for a recyclable polymer fracturing fluid and a preparation method thereof. The cross-linking agent comprises the following raw materials in parts by weight: 2-90 parts of high-valence metal salt, 2-80 parts of polyhydroxy compound, 2-70 parts of regulator, 1-50 parts of activator, 1-50 parts of anticoagulant, 1-100 parts of water, 2-90 parts of boron compound, 2-90 parts of alcohol amine compound and 2-20 parts of peroxide. In the invention, the cross-linking agent is combined with the synergistic effect of metal cross-linking and polymer molecular chain hydrophobic association, and simultaneously, a higher-strength complex reaction is carried out, and the cross-linking is carried out again to form the fracturing fluid; the activator, anticoagulant and peroxide all have strong gel breaking function, and when the activator, anticoagulant and peroxide are mixed with gel breaking liquid, the gel breaking time can be shortened, and the reaction time can be shortened. The recyclable polymer fracturing fluid can be crosslinked with the gel breaking liquid again into the fracturing fluid through a complex reaction, and meanwhile, the treatment capacity of the sewage of the flow-back liquid is reduced, so that the recyclable polymer fracturing fluid is safe and environment-friendly.
Description
Technical Field
The invention relates to the technical field of chemical additives for petroleum exploitation, and particularly relates to a cross-linking agent for a recyclable polymer fracturing fluid and a preparation method thereof.
Background
The fracturing is a process technology for improving the seepage characteristics of an oil-gas layer, is an important process measure for increasing the yield of an oil-gas well and increasing the injection of a water injection well, and has an important role in the development of low-permeability oil fields when oil and gas are extracted by oil and natural gas. After long-term research and development, the fracturing fluid forms various fracturing fluid systems which mainly comprise water-based fracturing fluid, including emulsified fracturing fluid, foam fracturing fluid, slickwater fracturing fluid and the like.
At present, with the development of compact reservoirs such as compact oil gas, shale gas and the like, the large-scale fracturing production increase provides powerful technical support for the development of low-permeability oil and gas fields, and the productivity of oil and gas wells is greatly improved.
However, there is a very serious problem: large scale fracturing operations produce large volumes of flowback effluent effluents that have not been effectively treated.
Therefore, the cross-linking agent for the recyclable polymer fracturing fluid and the preparation method thereof are provided.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, it is a primary object of the present invention to overcome at least one of the deficiencies of the prior art and to provide a cross-linking agent for a recyclable polymer fracturing fluid and a method for preparing the same. The cross-linking agent for the recyclable polymer fracturing fluid can be cross-linked with a gel breaking solution again through a complex reaction to form the fracturing fluid, reduces the treatment capacity of sewage of a flowback fluid, and is safe and environment-friendly.
In order to realize the technical scheme, the invention provides the following technical scheme:
a cross-linking agent for a recyclable polymer fracturing fluid comprises the following raw materials in parts by weight:
as a further improvement scheme of the invention, the cross-linking agent comprises the following raw materials in parts by weight:
as a further improved scheme of the invention, the cross-linking agent comprises the following raw materials in parts by weight:
in a further preferred embodiment of the present invention, the raw material of the cross-linking agent further comprises sugar, wherein the sugar is 10 to 50 parts by weight, and preferably 20 parts by weight.
In a further preferred embodiment of the present invention, the sugar is a monosaccharide or a disaccharide, wherein the monosaccharide is fructose or glucose, and the disaccharide is sucrose, maltose or lactose.
As a further preferable scheme of the invention, the high-valence metal salt is one or more of polyaluminium chloride or aluminium trichloride. Wherein, the polyaluminium chloride is a water purifying material, is an inorganic high-molecular coagulant, and is convenient for product mixing, dissolving and crosslinking.
As a further preferable scheme of the invention, the regulator is one or more of formic acid, acetic acid or lactic acid. The regulator is acidification regulator, and can be mixed with water, alcohols and ethers at will.
As a further preferable scheme of the invention, betaine is selected as the active agent.
As a further preferable scheme of the invention, the betaine is one or more of alkyl betaine, dodecyl dimethyl betaine, tetradecyl dimethyl betaine, octadecyl dihydroxyethyl betaine, alkylamide betaine and octadecylamidopropyl betaine. The active agent can have strong moisture absorption performance, and has positive effects of crosslinking and gel breaking.
In a further preferable embodiment of the present invention, the anticoagulant is one or two of sodium citrate and potassium citrate. The anticoagulant can effectively relieve product crosslinking and has a gel breaking effect.
As a further preferable scheme of the invention, the peroxide is one or more of hydrogen peroxide, ammonium persulfate and potassium persulfate. The peroxide can reduce the viscosity of the polymer solution and has positive effects on preventing crosslinking and gel breaking.
As a further preferable scheme of the invention, the polyhydroxy compound is selected from one or more of ethylene glycol, glycerol, mannitol, isopropanol, polyvinyl alcohol, sodium alginate, chitosan and transparent acid.
As a further preferable scheme of the invention, the boron compound is one or more of diborane, sodium borate, boric acid or borax.
As a further preferable scheme of the invention, the alcohol amine compound is one or more of monoethanolamine, diethanolamine, trimethylamine and triethanolamine.
A preparation method of a cross-linking agent for a recyclable polymer fracturing fluid at least comprises the following steps: adding high-valence metal salt into water, and stirring until the high-valence metal salt is completely dissolved; sequentially adding a polyhydroxy compound, a boron compound and an alcohol amine compound into the solution, and stirring for 80-120 min at 60-100 ℃; adding peroxide, and stirring at 60-100 ℃ for 10-20 min; then sequentially adding a regulator, an active agent and an anticoagulant; and continuously stirring for 10-20 min at the temperature of 60-100 ℃ to obtain the cross-linking agent for the recyclable polymer fracturing fluid.
As a further preferable embodiment of the present invention, the polyol compound, the boron compound and the alcohol amine compound are added in this order while stirring at 80 ℃ for 90 min.
As a further preferred embodiment of the present invention, when the peroxide is added, stirring is carried out at 90 ℃ for 10 min.
As a further preferable scheme of the invention, when a regulator, an active agent and an anticoagulant are added in sequence; stirring was continued for 10min at 90 ℃.
Compared with the prior art, the invention has at least one of the following advantages and positive effects: the cross-linking agent for the recyclable polymer fracturing fluid is added into the gel breaking fluid, and the cross-linking agent is combined with the synergistic effect of metal cross-linking and polymer molecular chain hydrophobic association, simultaneously generates a high-strength complex reaction, and is cross-linked again to form the fracturing fluid; the activator, anticoagulant and peroxide all have strong gel breaking function, and when the activator, anticoagulant and peroxide are mixed with gel breaking liquid, the gel breaking time can be shortened, and the reaction time can be shortened.
The recyclable polymer fracturing fluid can be crosslinked with the gel breaking liquid again into the fracturing fluid through a complex reaction, and meanwhile, the treatment capacity of the sewage of the flow-back liquid is reduced, so that the recyclable polymer fracturing fluid is safe and environment-friendly.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Example one
The cross-linking agent comprises the following raw materials in parts by weight:
the invention relates to a preparation method of a cross-linking agent for a recyclable polymer fracturing fluid, which comprises the following steps: adding high-valence metal salt into water, and stirring until the high-valence metal salt is completely dissolved; sequentially adding polyhydroxy compound, boron compound and alcohol amine compound into the solution, and stirring at 60 deg.C for 80 min; adding peroxide, and stirring at 60 deg.C for 10 min; then sequentially adding a regulator, an active agent, an anticoagulant and sugar; and continuously stirring for 10min at the temperature of 60 ℃ to obtain the cross-linking agent for the recyclable polymer fracturing fluid.
Example two
In the second embodiment of the present invention, the cross-linking agent comprises the following raw materials in parts by weight:
in the second embodiment, the preparation method of the cross-linking agent for the recyclable polymer fracturing fluid comprises the following steps: adding high-valence metal salt into water, and stirring until the high-valence metal salt is completely dissolved; sequentially adding polyhydroxy compound, boron compound and alcohol amine compound into the solution, and stirring at 90 ℃ for 100 min; adding peroxide, and stirring at 100 deg.C for 20 min; then sequentially adding a regulator, an active agent, an anticoagulant and sugar; and continuously stirring for 20min at the temperature of 100 ℃ to obtain the cross-linking agent for the recyclable polymer fracturing fluid.
EXAMPLE III
In the third embodiment of the present invention, the cross-linking agent comprises the following raw materials in parts by weight:
in the third embodiment, the preparation method of the cross-linking agent for the recyclable polymer fracturing fluid comprises the following steps: adding high-valence metal salt into water, and stirring until the high-valence metal salt is completely dissolved; sequentially adding polyhydroxy compound, boron compound and alcohol amine compound into the solution, and stirring at 80 ℃ for 90 min; adding peroxide, and stirring at 90 deg.C for 10 min; then sequentially adding a regulator, an active agent, an anticoagulant and sugar; and continuously stirring for 10min at the temperature of 90 ℃ to obtain the cross-linking agent for the recyclable polymer fracturing fluid.
In summary, the raw material composition and the weight part of the cross-linking agent of example 3 in examples 1 to 3 of the present invention are most reasonable. The cross-linking agent for the recyclable polymer fracturing fluid is added into the gel breaking fluid, and the cross-linking agent is combined with the synergistic effect of metal cross-linking and polymer molecular chain hydrophobic association, simultaneously generates a high-strength complex reaction, and is cross-linked again to form the fracturing fluid; the activator, anticoagulant and peroxide all have strong gel breaking function, and when the activator, anticoagulant and peroxide are mixed with gel breaking liquid, the gel breaking time can be shortened, and the reaction time can be shortened.
The recyclable polymer fracturing fluid can be crosslinked with the gel breaking liquid again into the fracturing fluid through a complex reaction, and meanwhile, the treatment capacity of the sewage of the flow-back liquid is reduced, so that the recyclable polymer fracturing fluid is safe and environment-friendly.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. The cross-linking agent for the recyclable polymer fracturing fluid is characterized by comprising the following raw materials in parts by weight:
2. the cross-linking agent for the recyclable polymer fracturing fluid as described in claim 1, wherein the cross-linking agent comprises the following raw materials in parts by weight:
3. the cross-linking agent for the recyclable polymer fracturing fluid as described in claim 2, wherein the cross-linking agent comprises the following raw materials in parts by weight:
4. the cross-linking agent for the recyclable polymer fracturing fluid as described in any one of claims 1 to 3, wherein the raw material of the cross-linking agent further comprises sugar, and the sugar is 10 to 50 parts by weight, preferably 20 parts by weight.
5. The cross-linking agent for the recyclable polymer fracturing fluid of claim 4, wherein the sugar is a monosaccharide or a disaccharide, wherein the monosaccharide is fructose or glucose, and the disaccharide is sucrose, maltose or lactose.
6. The cross-linking agent for the recyclable polymer fracturing fluid as described in any one of claims 1 to 3, wherein the high-valence metal salt is one or more of polyaluminum chloride or aluminum trichloride.
7. The cross-linking agent for the recyclable polymer fracturing fluid as described in any one of claims 1 to 3, wherein the modifier is one or more of formic acid, acetic acid or lactic acid.
8. The recoverable polymer fracturing fluid cross-linking agent of any of claims 1 to 3, wherein the active agent is selected from the group consisting of betaine;
the betaine is one or more of alkyl betaine, dodecyl dimethyl betaine, tetradecyl dimethyl betaine, octadecyl dihydroxyethyl betaine, alkylamide betaine, and stearamidopropyl betaine.
9. The cross-linking agent for the recyclable polymer fracturing fluid as described in any one of claims 1 to 3, wherein the peroxide is one or more selected from hydrogen peroxide, ammonium persulfate and potassium persulfate.
10. A preparation method of a cross-linking agent for a recyclable polymer fracturing fluid is characterized by at least comprising the following steps: adding high-valence metal salt into water, and stirring until the high-valence metal salt is completely dissolved; sequentially adding a polyhydroxy compound, a boron compound and an alcohol amine compound into the solution, and stirring for 80-120 min at 60-100 ℃; adding peroxide, and stirring at 60-100 ℃ for 10-20 min; then sequentially adding a regulator, an active agent and an anticoagulant; and continuously stirring for 10-20 min at the temperature of 60-100 ℃ to obtain the cross-linking agent for the recyclable polymer fracturing fluid.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911171411.6A CN110819335A (en) | 2019-11-26 | 2019-11-26 | Crosslinking agent for recyclable polymer fracturing fluid and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911171411.6A CN110819335A (en) | 2019-11-26 | 2019-11-26 | Crosslinking agent for recyclable polymer fracturing fluid and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106467734A (en) * | 2015-08-21 | 2017-03-01 | 中国石油化工股份有限公司 | A kind of pressure break cross-linking agent and preparation method thereof |
| CN106590611A (en) * | 2016-11-17 | 2017-04-26 | 新疆正通石油天然气股份有限公司 | Fracturing fluid of crosslinking association polymer and production method thereof |
| US20170233640A1 (en) * | 2014-08-28 | 2017-08-17 | Halliburton Energy Services, Inc. | Fracturing fluid and method of use |
| CN108084986A (en) * | 2017-12-21 | 2018-05-29 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of recyclable polymer fracturing fluid crosslinking agent and its preparation method and application |
-
2019
- 2019-11-26 CN CN201911171411.6A patent/CN110819335A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170233640A1 (en) * | 2014-08-28 | 2017-08-17 | Halliburton Energy Services, Inc. | Fracturing fluid and method of use |
| CN106467734A (en) * | 2015-08-21 | 2017-03-01 | 中国石油化工股份有限公司 | A kind of pressure break cross-linking agent and preparation method thereof |
| CN106590611A (en) * | 2016-11-17 | 2017-04-26 | 新疆正通石油天然气股份有限公司 | Fracturing fluid of crosslinking association polymer and production method thereof |
| CN108084986A (en) * | 2017-12-21 | 2018-05-29 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of recyclable polymer fracturing fluid crosslinking agent and its preparation method and application |
Non-Patent Citations (1)
| Title |
|---|
| 王所良等: "可回收聚合物压裂液体系及其性能研究", 《油田化学》 * |
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Application publication date: 20200221 |