CN114106795A - Clay stabilizer, and preparation method and application thereof - Google Patents
Clay stabilizer, and preparation method and application thereof Download PDFInfo
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- CN114106795A CN114106795A CN202210109681.XA CN202210109681A CN114106795A CN 114106795 A CN114106795 A CN 114106795A CN 202210109681 A CN202210109681 A CN 202210109681A CN 114106795 A CN114106795 A CN 114106795A
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- 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
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
- C09K8/035—Organic additives
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
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Abstract
The application discloses a clay stabilizer, and a preparation method and application thereof, and belongs to the technical field of clay stabilizers. The clay stabilizer comprises the following components in parts by weight: 2-8 parts of bis-indole methane compounds, 2-8 parts of quinazolinone compounds, 5-15 parts of methanol and 80-85 parts of water. The clay stabilizer has small molecular weight, is favorable for being dispersed on the surface of clay, has high anti-swelling efficiency, is easy to discharge, can reduce residue after fracturing or mining operation, and reduces the damage to stratum.
Description
Technical Field
The application relates to a clay stabilizer, a preparation method and application thereof, and belongs to the technical field of clay stabilizers.
Background
In recent years, with the rapid development of crude oil of various oil fields, the demand for improving the recovery ratio of the oil field is more and more prominent, and new tertiary oil recovery technology and oil displacement technology after the tertiary oil recovery are more and more emphasized. In the past, high molecular polymer is injected to prevent clay swelling in the tertiary oil recovery on a large scale. However, with the injection of a large amount of high molecular polymer, the formation pressure is increased continuously, the injection difficulty is increased, the formation is damaged more and more seriously, and a vicious circle is formed gradually. Therefore, the development and application of the technology for improving the recovery ratio after polymer displacement are taken as a major research subject in front of petroleum technologists.
The tertiary oil recovery is an important way for fully utilizing petroleum resources, and at present, the clay stabilizer is not only used in measures such as fracturing acidification and the like, but also plays a great role in tertiary oil recovery operation. The current clay stabilizer can aggravate the damage to the stratum due to factors such as large molecular weight, long molecular chain and the like, further perfecting the formula of the current clay stabilizer and researching and developing a novel clay stabilizer are works with scientific and technical significance and economic significance, and are valued by numerous researchers, and further research breakthrough can turn over a new page for the energy field.
Disclosure of Invention
In order to solve the problems, the clay stabilizer is obtained by compounding a diindolylmethane compound and a quinazolinone compound, has a small molecular weight, is favorable for being dispersed on the surface of clay, and contains a large amount of amino groups, so that the clay stabilizer can be fully adsorbed on the surface of the clay, and the clay expansion is effectively prevented.
According to one aspect of the present application, there is provided a clay stabilizer comprising, in parts by weight: 2-8 parts of bis-indole methane compounds, 2-8 parts of quinazolinone compounds, 5-15 parts of methanol and 80-85 parts of water;
the structural formula of the bis-indole methane compound is shown as the formula (1):
wherein R is1Is selected from-C6H5、-C6H4CH=CH、-C6H3(OH)2And- (CH)2)nCH3Any one of (1), R2Is selected from-H and- (CH)2)mCH3N is independently selected from any integer of 0-5, and m is independently selected from any integer of 0-5;
the structural formula of the quinazolinone compound is shown as the formula (2):
wherein R is3Is selected from-C6H5、-C6H4CH=CH、-C6H3(OH)2And- (CH)2)XCH3Wherein X is independently selected from any integer of 0-5;
said-C6H3(OH)2Is any one of catechol, resorcinol or hydroquinone substituent.
In the above-mentioned catechol, resorcinol and hydroquinone substituent, any point other than the hydroxyl group on the benzene ring may be bonded to a carbon atom of the main chain.
Optionally, the weight ratio of the bis-indolylmethane compound to the quinazolinone compound is (0.7-1.5): 1, preferably (0.9-1.1): 1, more preferably 1: 1.
optionally, the composition comprises, in parts by weight: 5 parts of bis-indole methane compound, 5 parts of quinazolinone compound, 10 parts of methanol and 80 parts of water.
Alternatively, the R is1Is selected from-C6H5or-C6H3(OH)2，R2Is selected from-H.
Alternatively, the R is1Is selected from-C6H5。
Alternatively, the R is3Is selected from-C6H3(OH)2。
Alternatively, the quinazolinone compound has the structural formula:
optionally, the anti-swelling rate of the clay stabilizer is more than or equal to 80%;
optionally, the clay stabilizer has a swelling volume of 2.1ml or less;
optionally, the washing resistance rate of the clay stabilizer is more than or equal to 90%.
Preferably, the anti-swelling rate of the clay stabilizer is more than or equal to 90 percent;
the expansion volume of the clay stabilizer is less than or equal to 1.1 ml;
the washing resistance rate of the clay stabilizer is more than or equal to 95 percent.
Optionally, the damage rate of the core of the clay stabilizer is less than or equal to 5%.
Preferably, the damage rate of the core of the clay stabilizer is less than or equal to 4%.
According to an aspect of the present application, there is provided a method for preparing the clay stabilizer of any one of the above, comprising the steps of: dissolving the diindolylmethane compound and the quinazolinone compound in methanol, uniformly stirring, and adding the water for mixing to obtain the clay stabilizer.
According to another aspect of the present application, there is provided the use of the clay stabilizer of any one of the above, or the clay stabilizer prepared by the above-mentioned method for preparing a clay stabilizer, in oilfield exploitation.
Benefits of the present application include, but are not limited to:
1. according to the clay stabilizer of this application, this clay stabilizer is the micromolecule, can evenly disperse among the clay, prevents that the inflation is efficient to this clay stabilizer easily discharges, can reduce after fracturing or the exploitation operation and remain, reduces the injury to the stratum.
2. According to the clay stabilizer, the clay stabilizer is obtained by compounding the diindolylmethane compound and the quinazolinone compound, contains a large amount of amino groups, contains more lone-pair electrons on the amino groups, is combined with hydrogen ions in water to enable nitrogen atoms to have positive charges, can attract negative charges on the surface of clay, is convenient to adsorb on the surface of the clay, and thus effectively prevents the clay from swelling.
3. According to the clay stabilizer, the clay stabilizer contains more rigid groups, the temperature resistance of the clay stabilizer can be improved, the use temperature range of the clay stabilizer is widened, a good anti-swelling effect can be kept even after high-temperature treatment at 200 ℃, and the clay stabilizer can be used in a high-temperature place.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a graph showing the swelling of bentonite in water.
Figure 2 is a graph of the swelling of bentonite in kerosene.
FIG. 3 is a graph showing the swelling of bentonite in water after addition of the clay stabilizer of the present application.
Detailed Description
The present application will be described in detail with reference to examples, but the present application is not limited to these examples.
The raw materials in the examples of the present application were all purchased commercially, unless otherwise specified.
Carrying out infrared spectrum analysis on the diindolylmethane compound and the quinazolinone compound by using a Fourier transform infrared spectrometer, and carrying out test analysis on the obtained diindolylmethane compound and quinazolinone compound by adopting an attenuated total reflection mode at room temperature.
Example 1
The embodiment relates to the preparation of bis (indolyl) methane compound, which comprises the following steps:
bis (indolylmethane) Compound # 1: indole and benzaldehyde
Dissolving indole and benzaldehyde with a molar ratio of 2:1 in a dichloromethane solvent, adding ferric chloride as a catalyst, stirring and reacting at 50 ℃ in a nitrogen atmosphere for at least 1h, filtering, extracting, drying, distilling under reduced pressure to remove the solvent after the reaction is finished to obtain a crude product, and purifying the crude product by column chromatography to obtain the bis-indolylmethane No. 1.
Bis (indolylmethane) compound # 2: indole and B-phenylacrolein
Dissolving indole and B-phenylacrolein with a molar ratio of 2:1 in a dichloromethane solvent, adding ferric chloride as a catalyst, stirring and reacting at 50 ℃ in a nitrogen atmosphere for at least 1h, filtering, extracting, drying, distilling under reduced pressure to remove the solvent after the reaction is finished to obtain a crude product, and finally purifying the crude product by column chromatography to obtain diindolylmethane # 2.
Bis (indolylmethane) compound # 3: indole and 3, 5-dihydroxybenzaldehyde
Dissolving indole and 3, 5-dihydroxybenzaldehyde in a molar ratio of 2:1 in a dichloromethane solvent, adding ferric chloride as a catalyst, stirring and reacting at 50 ℃ in a nitrogen atmosphere for at least 1h, filtering, extracting, drying, distilling under reduced pressure to remove the solvent after the reaction is finished to obtain a crude product, and purifying the crude product by column chromatography to obtain diindolylmethane # 3.
Bis (indolylmethane) compound # 4: indole and 2, 3-dihydroxybenzaldehyde
Dissolving indole and 2, 3-dihydroxybenzaldehyde in a molar ratio of 2:1 in a dichloromethane solvent, adding ferric chloride as a catalyst, stirring and reacting at 50 ℃ in a nitrogen atmosphere for at least 1h, filtering, extracting, drying, distilling under reduced pressure to remove the solvent after the reaction is finished to obtain a crude product, and purifying the crude product by column chromatography to obtain diindolylmethane # 4.
Bis (indolylmethane) compound # 5: indole and phenylmethyl methanones
Dissolving indole and phenylmethyl ketone with a molar ratio of 2:1 in a dichloromethane solvent, adding ferric chloride as a catalyst, stirring and reacting at 50 ℃ in a nitrogen atmosphere for at least 1h, filtering, extracting, drying, distilling under reduced pressure to remove the solvent after the reaction is finished to obtain a crude product, and finally purifying the crude product by column chromatography to obtain the bis-indolylmethane No. 5.
Example 2
This example relates to the preparation of quinazolinone compounds, as follows:
quinazolinone compound 1 #: anthranilamides and benzaldehydes
Dissolving anthranilamide and benzaldehyde in a molar ratio of 1:1 in a dichloromethane solvent, adding ferric chloride as a catalyst, wherein the molar ratio of the ferric chloride to the anthranilamide is 1:20, and stirring and reacting at 80 ℃ in a nitrogen atmosphere for at least 1 h. And after the reaction is finished, filtering, extracting, drying, distilling under reduced pressure to remove the solvent to obtain a crude product, and finally purifying the crude product by column chromatography to obtain quinazolinone No. 1.
Quinazolinone compound 2 #: anthranilamides and B-phenylacroleins
Dissolving anthranilamide and B-phenylacrolein in a molar ratio of 1:1 in a dichloromethane solvent, adding ferric chloride as a catalyst, wherein the molar ratio of the ferric chloride to the anthranilamide is 1:20, and stirring and reacting at 80 ℃ in a nitrogen atmosphere for at least 1 h. And after the reaction is finished, filtering, extracting, drying, distilling under reduced pressure to remove the solvent to obtain a crude product, and finally purifying the crude product by column chromatography to obtain quinazolinone No. 2.
Quinazolinone compound 3 #: anthranilamides and 3, 5-dihydroxybenzaldehydes
Dissolving anthranilamide and 3, 5-dihydroxy benzaldehyde in a molar ratio of 1:1 in a dichloromethane solvent, adding ferric chloride as a catalyst, wherein the molar ratio of the ferric chloride to the anthranilamide is 1:20, and stirring to react at 80 ℃ in a nitrogen atmosphere for at least 1 h. And after the reaction is finished, filtering, extracting, drying, distilling under reduced pressure to remove the solvent to obtain a crude product, and finally purifying the crude product by column chromatography to obtain quinazolinone 3 #.
Quinazolinone compound 4 #: anthranilamides and 2, 3-dihydroxybenzaldehydes
Dissolving anthranilamide and 2, 3-dihydroxy benzaldehyde in a molar ratio of 1:1 in a dichloromethane solvent, adding ferric chloride as a catalyst, wherein the molar ratio of the ferric chloride to the anthranilamide is 1:20, and stirring and reacting at 80 ℃ in a nitrogen atmosphere for at least 1 h. And after the reaction is finished, filtering, extracting, drying, distilling under reduced pressure to remove the solvent to obtain a crude product, and finally purifying the crude product by column chromatography to obtain quinazolinone 4 #.
Example 3
The embodiment relates to a clay stabilizer, which comprises 2-8 parts of bis-indole compound in embodiment 1, 2-8 parts of quinazolinone compound in embodiment 2, 5-10 parts of methanol and 80-85 parts of water, and the preparation method of the clay stabilizer comprises the following steps: dissolving diindolylmethane compound and quinazolinone compound in methanol, uniformly stirring, and adding water for mixing to obtain the clay stabilizer 1# -10# and the para-clay stabilizer D1# -D3#, wherein the content of each component in the clay stabilizer is shown in Table 1:
TABLE 1
The clay stabilizers 1# -10# and the comparative clay stabilizers D1# -D3# prepared by the method are subjected to a water injection clay stabilizer performance evaluation method SY/T1994(2002) according to the Chinese oil and gas industry standard, the anti-swelling effect of samples at room temperature and after being subjected to hot rolling for 24 hours at 200 ℃ is tested, and the water washing resistance performance test is performed at room temperature according to the enterprise standard Q/SH 0053-2010 clay stabilizer technical requirement, and specific results are shown in Table 2 below.
TABLE 2
According to the test results shown in the table 2, the clay stabilizer has high anti-swelling efficiency and strong water washing resistance, wherein the anti-swelling efficiency of the clay stabilizer 3# obtained by the diindolylmethane 1# and the quinazolinone 3# can reach 95% at most, and the clay stabilizer has good temperature resistance, can still keep high anti-swelling rate under high-temperature treatment, can be used for oil field exploitation at high temperature, can reduce damage to a rock core and is beneficial to protecting the ecological environment.
The above description is only an example of the present application, and the protection scope of the present application is not limited by these specific examples, but is defined by the claims of the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the technical idea and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A clay stabilizer is characterized by comprising the following components in parts by weight: 2-8 parts of bis-indole methane compounds, 2-8 parts of quinazolinone compounds, 5-15 parts of methanol and 80-85 parts of water;
the structural formula of the bis-indole methane compound is shown as the formula (1):
wherein R is1Is selected from-C6H5、-C6H4CH=CH、-C6H3(OH)2And- (CH)2)nCH3Any one of (1), R2Is selected from-H and- (CH)2)mCH3Wherein n is independently selected from any integer of 0-5, and m is independently selected from any integer of 0-5;
the structural formula of the quinazolinone compound is shown as the formula (2):
wherein R is3Is selected from-C6H5、-C6H4CH=CH、-C6H3(OH)2And- (CH)2)XCH3Wherein X is independently selected from any integer of 0 to 5;
said-C6H3(OH)2Is any one of catechol, resorcinol or hydroquinone substituent.
2. The clay stabilizer according to claim 1, wherein the weight ratio of the bis-indolylmethane-based compound to the quinazolinone-based compound is (0.7-1.5): 1.
3. the clay stabilizer according to claim 2, comprising, in parts by weight: 5 parts of bis (indolyl) methane compound; 5 parts of quinazolinone compounds; 10 parts of methanol and 80 parts of water.
4. The clay stabilizer according to claim 1, wherein R is1Is selected from-C6H5，R2Is selected from H.
5. The clay stabilizer according to claim 1, wherein R is3Is selected from-C6H3(OH)2。
6. The clay stabilizer according to claim 5, wherein the quinazolinone compound has the structural formula:
7. the clay stabilizer according to claim 1, wherein the clay stabilizer has an anti-swelling rate of 80% or more; and/or
The swelling volume of the clay stabilizer is less than or equal to 2.1 ml.
8. The clay stabilizer according to claim 1, wherein the core damage rate of the clay stabilizer is less than or equal to 5%; and/or
The washing resistance rate of the clay stabilizer is more than or equal to 90 percent.
9. The method for preparing a clay stabilizer according to any one of claims 1 to 8, comprising the steps of: dissolving the diindolylmethane compound and the quinazolinone compound in methanol, uniformly stirring, and adding water for mixing to obtain the clay stabilizer.
10. Use of a clay stabilizer according to any one of claims 1 to 8, or prepared by a process according to claim 9, in oil field mining.
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| CN117384608A (en) * | 2023-12-13 | 2024-01-12 | 德仕能源科技集团股份有限公司 | Oilfield treating agent with functions of cleanup additive and clay stabilizer and preparation method thereof |
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