CN110938417B - Xanthan gum-based profile control agent for oil exploitation and preparation method and application thereof - Google Patents
Xanthan gum-based profile control agent for oil exploitation and preparation method and application thereof Download PDFInfo
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- 229920001285 xanthan gum Polymers 0.000 title claims abstract description 78
- 239000000230 xanthan gum Substances 0.000 title claims abstract description 68
- 235000010493 xanthan gum Nutrition 0.000 title claims abstract description 68
- 229940082509 xanthan gum Drugs 0.000 title claims abstract description 68
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title abstract description 9
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims abstract description 26
- 229920002907 Guar gum Polymers 0.000 claims abstract description 20
- 239000000665 guar gum Substances 0.000 claims abstract description 20
- 235000010417 guar gum Nutrition 0.000 claims abstract description 20
- 229960002154 guar gum Drugs 0.000 claims abstract description 20
- 238000011084 recovery Methods 0.000 claims abstract description 18
- 150000003839 salts Chemical class 0.000 claims abstract description 15
- 235000010265 sodium sulphite Nutrition 0.000 claims abstract description 13
- 239000002253 acid Substances 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 239000002131 composite material Substances 0.000 claims abstract 2
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims description 12
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims description 8
- 239000001384 succinic acid Substances 0.000 claims description 6
- 239000001361 adipic acid Substances 0.000 claims description 4
- 235000011037 adipic acid Nutrition 0.000 claims description 4
- GJCOSYZMQJWQCA-UHFFFAOYSA-N 9H-xanthene Chemical compound C1=CC=C2CC3=CC=CC=C3OC2=C1 GJCOSYZMQJWQCA-UHFFFAOYSA-N 0.000 claims 10
- 230000007774 longterm Effects 0.000 abstract description 6
- 238000000605 extraction Methods 0.000 description 21
- 239000012752 auxiliary agent Substances 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000000654 additive Substances 0.000 description 6
- 230000000996 additive effect Effects 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 6
- 229920001222 biopolymer Polymers 0.000 description 6
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- 230000007613 environmental effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000005457 optimization Methods 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- 230000015784 hyperosmotic salinity response Effects 0.000 description 4
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- 239000003208 petroleum Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000013329 compounding Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 230000033558 biomineral tissue development Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 244000275012 Sesbania cannabina Species 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 230000009044 synergistic interaction Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
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- 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
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/514—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
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- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
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- Cosmetics (AREA)
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Abstract
The invention relates to a xanthan gum-based profile control agent for oil exploitation and a preparation method and application thereof. The composite material is prepared from the following raw materials in parts by weight: 50-90 parts of xanthan gum, 5-45 parts of guar gum, 1-3 parts of dibasic acid and 1-5 parts of sodium sulfite. The profile control agent has the temperature resistance as high as 110 ℃ and the salt resistance as high as 100,000 ppm. The profile control agent of the invention has long-term stability in a high-temperature state as an oil recovery aid, and the average viscosity loss rate is below 20% after 6 months at 100 ℃.
Description
Technical Field
The invention belongs to the technical field of oil exploitation, and particularly relates to a xanthan gum-based profile control agent for oil exploitation and a preparation method and application thereof.
Background
This section of information in this background of the invention disclosure is intended only to enhance an understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms part of the prior art already known to a person of ordinary skill in the art.
In recent years, oil fields are continuously exploited for years, and a plurality of water-driven oil fields enter the middle and later stages. In the period, because of the heterogeneity of the reservoir and the unfavorable mobility ratio, a large amount of residual oil still exists in the water-driven stratum, and the phenomena of high water content, low yield and poor mining economic benefit of the oil well are generally shown. At the same time, the demand for petroleum in international and domestic markets has increased year by year. In order to ensure the stable production and the yield increase of the oil field and solve the contradiction between the oil yield and the market demand, the demand of various oil extraction aids is increased sharply. With the rapid development of economic society and the gradual enhancement of environmental protection consciousness and strength, the application of oil extraction aids represented by chemically synthesized high molecular polymer polyacrylamide is limited year by year, and the research and application of biological high molecular polymers represented by xanthan gum, guar gum and sesbania gum gradually become global hotspots.
The xanthan gum has been widely applied to tertiary oil recovery, drilling fluid, fracturing fluid and the like of oil fields due to the outstanding characteristics of thickening, suspension, emulsification, biodegradability and the like, and statistical data show that the annual consumption of the xanthan gum is over 10 ten thousand tons all over the world, and the xanthan gum accounts for over 60 percent of the annual output of the xanthan gum. China is the country with the largest global xanthan gum productivity, the annual output accounts for more than 75%, but the application amount of the domestic petroleum industry is not high, and a large amount of xanthan gum products are exported to the main petroleum production places of the middle east, the United states and the like every year. Comprehensive analysis shows that the main reason for the small application amount of the xanthan gum in the oil field in China is determined by comprehensive factors such as oil reservoir geological conditions, oil extraction cost and the like in China. However, with the rapid development of economy in China and the increasing of the strength of environmental protection policies, the research and practice of the application of biopolymer represented by xanthan gum in oil extraction of oil fields are rapidly increasing, but the geological conditions of oil reservoirs in China are extremely complex, the oil reservoir stratum is deep, high in temperature and high in mineralization degree, and the proportion of easy exploitation is sharply reduced through continuous development for decades. The xanthan gum has stable yield and low price in the biopolymer, but the application effect of the xanthan gum is obviously reduced under the conditions of high temperature (higher than 70 ℃) and high salt (higher than 50,000ppm) due to the self physicochemical property of the molecule.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a xanthan gum-based temperature-resistant and salt-tolerant profile control agent for oil exploitation, and a preparation method and application thereof.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a temperature-resistant and salt-tolerant profile control agent based on xanthan gum for petroleum exploitation is composed of the following raw materials in parts by weight: 50-90 parts of xanthan gum, 5-45 parts of guar gum, 1-3 parts of dibasic acid and 1-5 parts of sodium sulfite.
The profile control agent based on the microbial polysaccharide xanthan gum prepared by the invention is in a uniform and stable solution state after being dissolved in water. The profile control agent is a substance capable of adjusting the swept area of injected oil displacement fluid in an oil reservoir stratum. The xanthan gum is used as a profile control agent, and due to the self physicochemical property, the application effect of the xanthan gum in the high-temperature and high-salt environment is poor, the application effect of the xanthan gum as the profile control agent is improved, the profile control agent can have a good profile control effect under the high-temperature and high-salt conditions, and experiments show that the profile control agent has better stability under the high-temperature and high-salt conditions.
In some embodiments, the composition comprises the following raw materials in parts by weight: 55-90 parts of xanthan gum, 10-45 parts of guar gum, 2-3 parts of dibasic acid and 1.5-5 parts of sodium sulfite. The invention is improved on the basis of a xanthan gum product produced by taking starch as a raw material, the added guar gum and the xanthan gum have a synergistic interaction effect, dibasic acid is taken as a system viscosity stabilizer, sodium sulfite is taken as a system antioxidant stabilizer, and all components are mutually influenced to form a stable system under a certain temperature water solution state.
In some embodiments, the composition comprises the following raw materials in parts by weight: 77 parts of xanthan gum, 19 parts of guar gum, 2 parts of dibasic acid and 2 parts of sodium sulfite. The inventors found that the profile control agent composed of the above components in parts by weight has better high-temperature and high-salt resistance.
In some embodiments, the xanthan gum has a molecular weight of 106～107Da, molecular weight of guar gum is 104～105Da。
In some embodiments, the dibasic acid is one of adipic acid and succinic acid.
The profile control agent provided by the invention is applied as an oil extraction auxiliary agent under a high-temperature condition.
Preferably, the temperature applied is 110 ℃ or lower; further preferably 20 to 110 ℃.
Provides the application of the profile control agent as an oil recovery additive under high-salt conditions.
Preferably, the high salt environment employed is 100,000ppm or less; further preferably 2000-100,000 ppm.
Preferably, in the application, the use concentration of the profile control agent is 1,000-8,000 ppm.
The invention has the beneficial effects that:
(1) compared with the existing xanthan gum product, the xanthan gum has a series of outstanding characteristics of high temperature resistance, high salt resistance, low dosage, environmental protection and biodegradability, and the xanthan gum meets the requirements of the existing oil field on the performance, cost, dosage, environmental protection and the like of the oil extraction auxiliary agent, and has remarkable progress.
(2) The oil extraction auxiliary agent prepared by organically combining various functional substances has the temperature resistance as high as 110 ℃;
(3) the oil extraction auxiliary agent prepared by organically combining a plurality of functional substances has the salt tolerance as high as 100,000 ppm;
(4) the oil extraction auxiliary agent prepared by organically combining a plurality of functional substances has long-term stability in a high-temperature state, and the average viscosity loss rate is below 20% after 6 months at 100 ℃.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the invention and not to limit the invention.
FIG. 1 is a temperature resistance comparison curve chart before and after the xanthan gum product is compounded and optimized;
FIG. 2 is a comparison curve of salt tolerance before and after optimization of xanthan gum;
FIG. 3 is a comparison graph of long-term stability of xanthan gum products under high temperature and high salt conditions before and after formulation optimization.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The invention will be further illustrated by the following examples
Example 1 an improved environmental-friendly oil field profile control agent
The environment-friendly high-temperature-resistant salt-tolerant oil field oil extraction auxiliary based on xanthan gum comprises the following components in parts by weight:
72 parts of xanthan gum;
23 parts of guar gum;
1.5 parts of succinic acid;
3.5 parts of sodium sulfite.
The preparation method of the environment-friendly high temperature-resistant salt-tolerant oil field oil extraction auxiliary agent based on xanthan gum comprises the following steps: 720g of xanthan gum, 230g of guar gum, 15g of succinic acid and 35g of sodium sulfite are respectively weighed and fully mixed uniformly to obtain 1000g of oil field oil extraction additive based on the biopolymer, and the oil field oil extraction additive is sealed and stored for later use.
Example 2 an improved environmental protection oil field profile control agent
The environment-friendly high-temperature-resistant salt-tolerant oil field oil extraction auxiliary agent based on xanthan gum comprises the following components in parts by weight:
50 parts of xanthan gum;
42 parts of guar gum;
3 parts of adipic acid;
and 5 parts of sodium sulfite.
The preparation method of the environment-friendly high temperature-resistant salt-tolerant oil field oil extraction auxiliary agent based on xanthan gum comprises the following steps: respectively weighing 500g of xanthan gum, 420g of guar gum, 30g of adipic acid and 50g of sodium sulfite, fully and uniformly mixing to obtain 1000g of oil field oil extraction additive based on the biopolymer, and sealing for later use.
Example 3 an improved environmental protection oil field Profile control agent
The improved environment-friendly oil field profile control agent comprises the following components in parts by weight:
90 parts of xanthan gum;
5.0 parts of guar gum;
1.0 part of succinic acid;
4.0 part of sodium sulfite.
The preparation method of the environment-friendly high temperature-resistant salt-tolerant oil field oil extraction auxiliary agent based on xanthan gum comprises the following steps: respectively weighing 900g of xanthan gum, 50g of guar gum, 10g of succinic acid and 40g of sodium sulfite, fully and uniformly mixing to obtain 1000g of oil field oil extraction additive based on the biopolymer, and sealing for later use.
Example 4
Compared with the embodiment 1, the composition comprises the following components in percentage by mass: 85% of xanthan gum, 12% of guar gum, 1% of dibasic acid and 2% of sodium sulfite. The preparation method is the same as in example 1.
Comparative example 1 comparison of temperature resistance of aqueous solution of compounded optimized xanthan gum product and initial xanthan gum product
The optimized compounded xanthan gum product described in example 1 and the initial xanthan gum product are respectively prepared into 2,000ppm aqueous solutions, and after the aqueous solutions are fully dissolved, the solutions are respectively kept stand and insulated at room temperature (25 ℃), 70, 80, 90, 100, 110, 120 and 130 ℃ for 2 hours, and then cooled to 25 ℃, and then the viscosity value of the solutions is measured, and the result is shown in figure 1 below.
Viscosity measurement apparatus and method: brookfield DV2-T type viscosity, 62# rotor, 3r/min, was measured for 90s, averaged over 60s, and 3 averages were taken for each sample.
Compared with the test result shown in fig. 1, the temperature resistance of the xanthan gum product is improved from 90 ℃ to 110 ℃ through compounding optimization, the temperature resistance of the xanthan gum product and the profile control agent for oil field oil extraction is obviously improved, and the application range of the xanthan gum product in the field of oil field oil extraction engineering is expanded.
Comparative example 2 comparison of salt tolerance of Compound optimized Xanthan Gum product with an initial Xanthan Gum product aqueous solution
Taking the compounded optimized xanthan gum product described in the example 1 and the initial xanthan gum product, respectively preparing 2,000ppm solutions by using water with the mineralization degrees of 0, 10,000, 25,000, 50,000, 75,000, 100,000, 125,000 and 150,000ppm, standing at 90 ℃, keeping the temperature for 2 hours, cooling to 25 ℃, and then measuring the viscosity value of each solution. The results are shown in FIG. 2. The salt resistance of the xanthan gum product is improved to 100,000ppm through compounding optimization, and the application property is obviously improved.
Comparative example 3 comparison of high temperature Long-term stability of Compound optimized Xanthan Gum product with aqueous solution of initial Xanthan Gum product
The optimized compounded xanthan gum product described in example 1 and the initial xanthan gum product were prepared into 2,000ppm solutions with 50,000ppm water, mixed well, and then kept at 100 ℃ for heat preservation, and the solution viscosity was measured by sampling at different times, the results are shown in fig. 3.
Comparative example 4
Compared with the example 1, the mass part of the guar gum is 50 parts.
By measuring the temperature and salt resistance of the aqueous solution of comparative example 4, and the results are shown in Table 1 below, it can be seen that when the content of guar gum is increased, the salt resistance of the profile control agent is reduced, and the temperature resistance is not significantly affected.
TABLE 1 temperature and salt tolerance test of profile control agent after increasing guar gum proportion to 50 parts
From the comparative experiment results, the compound optimization profile control agent prepared by compounding xanthan gum and guar gum for synergistic synergism and assisting a stabilizer antioxidant has more outstanding improvements in temperature resistance, salt resistance and long-term stability of gel compared with a pure xanthan gum product, particularly has the most obvious characteristic of long-term stability (the viscosity loss rate in 6 months is only 17.8%) of solution viscosity at a high temperature (100 ℃) state, and shows that the compound is an innovative environment-friendly high-temperature-resistant high-salt-resistant oil field oil extraction additive based on the biopolymer xanthan gum and has very wide oil field application prospect.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A profile control agent for oil exploitation based on xanthan gum is characterized in that: the composite material is prepared from the following raw materials in parts by weight: 72-90 parts of xanthan gum, 5-23 parts of guar gum, 1-3 parts of dibasic acid and 1-5 parts of sodium sulfite.
2. A xanthan-based profile control agent for oil exploitation as claimed in claim 1, wherein: the molecular weight of the xanthan gum is 106-107 Da, and the molecular weight of the guar gum is 104-105 Da.
3. A xanthan-based profile control agent for oil exploitation according to claim 1, characterized in that: the dibasic acid is one of adipic acid and succinic acid.
4. Use of a xanthan-based oil recovery profile control agent according to any one of claims 1 to 3 as an oil recovery aid under high temperature conditions.
5. Use of a xanthan-based profile control agent for oil recovery as an oil recovery aid under high temperature conditions according to claim 4, characterized in that: the temperature is less than or equal to 110 ℃.
6. Use of a xanthan-based profile control agent for oil recovery as an oil recovery aid under high temperature conditions according to claim 5, characterized in that: the temperature applied is 20-110 ℃.
7. Use of a xanthan-based oil recovery profile control agent according to any one of claims 1 to 3 as an oil recovery aid under high salt conditions.
8. Use of a xanthan-based profile control agent for oil recovery as an oil recovery aid under high salt conditions according to claim 7, characterized in that: the high salt environment applied is less than or equal to 100,000 ppm.
9. Use of a xanthan-based profile control agent for oil recovery as an oil recovery aid under high salt conditions according to claim 8, characterized in that: the high salt environment applied was 2000-100,000 ppm.
10. Use of a xanthan-based profile control agent for oil recovery according to any one of claims 4 to 6 as an oil recovery aid under high temperature conditions or a xanthan-based profile control agent according to any one of claims 7 to 9 as an oil recovery aid under high salt conditions, characterized in that: the use concentration of the profile control agent is 1,000-8,000 ppm.
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| US5972047A (en) * | 1998-03-10 | 1999-10-26 | Westvaco Corporation | Amine modified sulfonated lignin for disperse dye |
| CN104109512A (en) * | 2013-04-16 | 2014-10-22 | 北京力会澜博能源技术有限公司 | Low temperature fuzzy-ball working fluid fluff agent |
| CN110511731A (en) * | 2019-08-22 | 2019-11-29 | 山东省食品发酵工业研究设计院 | A kind of environment-friendly type oil field profile control agent and its preparation method and application |
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| CN107474819B (en) * | 2017-09-06 | 2021-07-30 | 大连知微生物科技有限公司 | In-situ crosslinking bio-based gel for fracturing or profile control and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5972047A (en) * | 1998-03-10 | 1999-10-26 | Westvaco Corporation | Amine modified sulfonated lignin for disperse dye |
| CN104109512A (en) * | 2013-04-16 | 2014-10-22 | 北京力会澜博能源技术有限公司 | Low temperature fuzzy-ball working fluid fluff agent |
| CN110511731A (en) * | 2019-08-22 | 2019-11-29 | 山东省食品发酵工业研究设计院 | A kind of environment-friendly type oil field profile control agent and its preparation method and application |
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