CN110655911A - Modified resin sand consolidation agent and preparation method thereof - Google Patents
Modified resin sand consolidation agent and preparation method thereof Download PDFInfo
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- CN110655911A CN110655911A CN201810712573.5A CN201810712573A CN110655911A CN 110655911 A CN110655911 A CN 110655911A CN 201810712573 A CN201810712573 A CN 201810712573A CN 110655911 A CN110655911 A CN 110655911A
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- agent
- resin
- modified resin
- sand consolidation
- formaldehyde
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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
- C09K8/56—Compositions for consolidating loose sand or the like around wells without excessively decreasing the permeability thereof
- C09K8/57—Compositions based on water or polar solvents
- C09K8/572—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
- C09K8/56—Compositions for consolidating loose sand or the like around wells without excessively decreasing the permeability thereof
- C09K8/57—Compositions based on water or polar solvents
- C09K8/575—Compositions based on water or polar solvents containing organic compounds
- C09K8/5751—Macromolecular compounds
- C09K8/5755—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
Abstract
The invention discloses a modified resin sand consolidation agent and a preparation method thereof, wherein the resin sand consolidation agent comprises the following components in parts by weight: modified resin: proppant: diluent agent: curing agent: coupling agent 100: 50: 30: 5: 0.1, mixing the components in proportion. The modified resin sand consolidation agent can realize rapid solidification and has certain porosity. The sand consolidation agent has high compressive strength, is suitable for oil wells, and can effectively solve the influence of sand production of the oil wells on oil extraction production in the oil extraction process.
Description
Technical Field
The invention relates to a modified resin sand consolidation agent and a preparation method thereof, and relates to the field of preparation of sand consolidation agents.
Background
Excessive water output of an oil well is one of the important problems faced by the oil field, and excessive water output not only causes the reduction of crude oil recovery rate, but also causes pollution to the environment, so that water plugging of the oil well is not only required for oil well exploitation, but also required for environmental protection. Chemical sand-fixation agent (resin) is a derivative of aromatic hydrocarbon. Hydroxyl (-OH) and ether (-O-) in the sand consolidation agent have strong adsorbability on silanol (-SiOH) on the surface of the sandstone, so that the oligomerization chemical sand consolidation agent is uniformly coated on the surface of the sandstone, and is continuously polymerized at the formation temperature to form a matrix chain, and loose sandstone is firmly combined together. Resin sand consolidation has many advantages and is currently one of the major sand consolidation methods.
The existing sand consolidation agent has some defects; the resin is cured in a short time, which is not favorable for safe production; the new energy of the resin is unstable, the storage time is short, the compressive strength after curing is low, and the resin is easy to decompose; the pretreatment difficulty is high, and the cost is high; high free formaldehyde content, environmental pollution and harm to human body.
Disclosure of Invention
The invention aims to provide a modified resin sand consolidation agent and a preparation method thereof, the sand consolidation agent has high compressive strength and high curing speed, and can effectively solve the influence of sand production of an oil well on oil extraction production in the oil extraction process.
In order to realize the aim, the invention provides a modified resin sand consolidation agent, which comprises the following components in parts by weight:
modified resin: proppant: diluent agent: curing agent: coupling agent 100: 50: 30: 5: 0.1
A modified resin sand consolidation agent is prepared from the following components: 100% of modified resin; the dosage of the diluent is 45-65%; 30% of a proppant; the dosage of the curing agent is 1-5 percent; 0.1 to 0.5 percent of coupling agent; the above percentages are weight percentages based on 100% of the modified resin.
Further, the modified resin is a mixture of urea-formaldehyde resin and furfural resin, and the mass ratio of the furfural resin to the urea-formaldehyde resin is 1: 3-1: 5.
Further, the diluent is acetone, ethanol, tap water or saline.
Further, the proppant is carbon black.
Further, the curing agent is hexamethyleneimine, a dilute hydrochloric acid solution or a p-toluenesulfonic acid solution.
Further, the coupling agent is a silane coupling agent KH-550.
A modified resin synthesized by the steps of:
mixing modified resin, a diluent, a curing agent and a coupling agent together, and then uniformly stirring for curing to finish the preparation of the modified resin sand consolidation agent; the curing temperature range is 25-55 ℃.
The preparation process of the modified resin raw material is as follows: adding urea and formaldehyde as raw materials according to the mass ratio of 1:3, reacting for 1-1.5h at 40-60 ℃ by using ammonia water as a catalyst, heating to 80-90 ℃, and reacting for 1.5-2h to obtain urea-formaldehyde resin;
the mass ratio of the raw material furfural to the raw material formaldehyde is 1: 2, adding ammonia water serving as a catalyst, reacting for 1-1.5h at 40-60 ℃, heating to 80-90 ℃, and continuing to react for 1.5-2h to prepare furfural resin;
mixing furfural resin and urea-formaldehyde resin according to the mass ratio of 1: 3-1: 5, adding a formaldehyde aqueous solution, and reacting at 95 ℃ for 3 hours to obtain the modified resin.
Compared with the prior art, the invention has the following remarkable advantages:
1. the sand consolidation agent has high compressive strength which can reach 8.50MPa and is far higher than 3.5MPa of the conventional resin sand consolidation agent, and has the advantages of high curing speed and 1 hour of curing time, and the curing time of the conventional sand consolidation agent is 72 hours, so that the sand consolidation agent can be used in oil fields and can improve the exploitation efficiency of the oil fields.
2. The sand consolidation agent can ensure a certain permeability while agglomerating loose sand, can effectively solve the influence of sand production of an oil well on oil extraction production in the oil extraction process, and has better alkali resistance, acid resistance, salt resistance and water resistance; the sand consolidation agent has simple preparation method, convenient use and convenient large-scale production and popularization.
Detailed Description
The invention will be further described with reference to the following examples
Example 1
The modified resin sand consolidation agent comprises the following components in parts by weight:
modified resin: proppant: diluent agent: curing agent: coupling agent 100: 50: 30: 5: 0.1
Wherein the diluent is saline, and the curing agent is p-toluenesulfonic acid: the coupling agent is silane coupling agent KH-550
The modified resin is synthesized by the following steps:
1. preparation of modified resin:
the mass ratio of the raw material urea to the raw material formaldehyde is 1: 3. ammonia water is used as a catalyst, the reaction is carried out for 1.3h at the temperature of 50 ℃, the temperature is increased to 85 ℃, the reaction is continued for 2h, the resin 1 is prepared, and the yield is 93.8%. The mass ratio of the raw material furfural to the raw material formaldehyde is 1: 2. ammonia water is used as a catalyst, the reaction is carried out for 1.5h at the temperature of 50 ℃, the temperature is increased to 85 ℃, the reaction is continued for 1.5h, and the resin 2 is prepared, wherein the yield is 88.6%. Mixing the components in a mass ratio of 1: 4, mixing the furfural resin and the urea-formaldehyde resin, adding a formaldehyde aqueous solution, and reacting at 95 ℃ for 3 hours to obtain the modified resin.
The components are uniformly mixed according to the proportion, pre-curing is completed after stirring for 15 minutes at room temperature, and complete curing is completed after 1 hour. After the solidification, the compressive strength is high, and the alkali resistance is realized.
Example 2
The modified resin sand consolidation agent comprises the following components in parts by weight:
modified resin: proppant: diluent agent: curing agent: coupling agent 100: 50: 30: 5: 0.1
Wherein the diluent is saline, and the curing agent is p-toluenesulfonic acid: the coupling agent is silane coupling agent KH-550
The modified resin is synthesized by the following steps:
1. preparation of modified resin:
the raw material urea and the raw material formaldehyde are mixed according to the proportion of 1: 3. ammonia water is used as a catalyst, the reaction is carried out for 1.3h at the temperature of 50 ℃, the temperature is increased to 85 ℃, the reaction is continued for 2h, the resin 1 is prepared, and the yield is 93.8%. Mixing raw material furfural and raw material formaldehyde according to the weight ratio of 1: 2. ammonia water is used as a catalyst, the reaction is carried out for 1.5h at the temperature of 50 ℃, the temperature is increased to 85 ℃, the reaction is continued for 1.5h, and the resin is prepared, wherein the yield is 88.6%. Mixing furfural resin and urea-formaldehyde resin according to a mass ratio of 1: 4, adding formaldehyde aqueous solution, and reacting for 3 hours at 95 ℃ to obtain the modified resin.
The components are uniformly mixed according to a proportion, pre-curing is completed after stirring for 15 minutes at 45 ℃, and the curing is completed after 1 hour, so that the compression strength is high and the alkali resistance is poorer than that of a cured product at room temperature after the curing is completed.
The modified resin sand consolidation agent is detected, and the result is that the modified resin sand consolidation agent is cured for 5 hours at room temperature. After 5 hours, the compressive strength was 8.50MPa, and the water permeability was 635.82X 10-3μm3。
Claims (8)
1. The modified resin sand consolidation agent is characterized by being prepared from the following components: 100% of modified resin; the dosage of the diluent is 45-65%; 30% of a proppant; the dosage of the curing agent is 1-5 percent; 0.1 to 0.5 percent of coupling agent; the percentage is weight percentage based on 100 percent of modified resin.
2. The sand consolidation agent according to claim 1, wherein the modified resin is a mixture of urea-formaldehyde resin and furfural resin, and the mass ratio of the furfural resin to the urea-formaldehyde resin is 1: 3-1: 5.
3. The sand consolidation agent of claim 1, wherein the diluent is acetone, ethanol, tap water, or saline.
4. The sand consolidation agent of claim 1, wherein the proppant is carbon black.
5. The sand consolidation agent of claim 1, wherein the curing agent is hexamethyleneimine, a dilute hydrochloric acid solution, or a p-toluenesulfonic acid solution.
6. The sand consolidation agent according to claim 1, wherein the coupling agent is a silane coupling agent KH-550.
7. The preparation method of the modified resin sand consolidation agent according to the claims 1 to 6, characterized in that the modified resin, the diluent, the curing agent and the coupling agent are mixed together and then stirred uniformly for curing, thereby completing the preparation of the modified resin sand consolidation agent; the curing temperature range is 25-55 ℃.
8. The method for preparing the modified resin sand consolidation agent according to claim 7, wherein the preparation process of the modified resin raw material is as follows: adding urea and formaldehyde as raw materials according to the mass ratio of 1:3, reacting for 1-1.5h at 40-60 ℃ by using ammonia water as a catalyst, heating to 80-90 ℃, and reacting for 1.5-2h to obtain urea-formaldehyde resin;
the mass ratio of the raw material furfural to the raw material formaldehyde is 1: 2, adding ammonia water serving as a catalyst, reacting for 1-1.5h at 40-60 ℃, heating to 80-90 ℃, and continuing to react for 1.5-2h to prepare furfural resin;
mixing furfural resin and urea-formaldehyde resin according to the mass ratio of 1: 3-1: 5, adding a formaldehyde aqueous solution, and reacting at 95 ℃ for 3 hours to obtain the modified resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810712573.5A CN110655911A (en) | 2018-06-29 | 2018-06-29 | Modified resin sand consolidation agent and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810712573.5A CN110655911A (en) | 2018-06-29 | 2018-06-29 | Modified resin sand consolidation agent and preparation method thereof |
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| CN110655911A true CN110655911A (en) | 2020-01-07 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3976135A (en) * | 1972-10-02 | 1976-08-24 | Halliburton Company | Method of forming a highly permeable solid mass in a subterranean formation |
| US4042032A (en) * | 1973-06-07 | 1977-08-16 | Halliburton Company | Methods of consolidating incompetent subterranean formations using aqueous treating solutions |
| EP0078896A2 (en) * | 1981-11-10 | 1983-05-18 | Norton Company | Abrasive bodies such as grinding wheels |
| US4898750A (en) * | 1988-12-05 | 1990-02-06 | Texaco Inc. | Processes for forming and using particles coated with a resin which is resistant to high temperature and high pH aqueous environments |
| CN103277066A (en) * | 2007-09-25 | 2013-09-04 | 哈利伯顿能源服务公司 | Methods and compositions relating to minimizing particulate migration over long intervals |
| CN106634918A (en) * | 2016-11-17 | 2017-05-10 | 中国石油天然气股份有限公司 | High-intensity modified resin sand consolidating agent |
-
2018
- 2018-06-29 CN CN201810712573.5A patent/CN110655911A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3976135A (en) * | 1972-10-02 | 1976-08-24 | Halliburton Company | Method of forming a highly permeable solid mass in a subterranean formation |
| US4042032A (en) * | 1973-06-07 | 1977-08-16 | Halliburton Company | Methods of consolidating incompetent subterranean formations using aqueous treating solutions |
| EP0078896A2 (en) * | 1981-11-10 | 1983-05-18 | Norton Company | Abrasive bodies such as grinding wheels |
| US4898750A (en) * | 1988-12-05 | 1990-02-06 | Texaco Inc. | Processes for forming and using particles coated with a resin which is resistant to high temperature and high pH aqueous environments |
| CN103277066A (en) * | 2007-09-25 | 2013-09-04 | 哈利伯顿能源服务公司 | Methods and compositions relating to minimizing particulate migration over long intervals |
| CN106634918A (en) * | 2016-11-17 | 2017-05-10 | 中国石油天然气股份有限公司 | High-intensity modified resin sand consolidating agent |
Non-Patent Citations (1)
| Title |
|---|
| 洪晓东: "改性脲醛树脂的合成及性能", 《化工进展》 * |
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