CN117777986A - Efficient composite nano drag reducer for oil well and preparation method thereof - Google Patents
Efficient composite nano drag reducer for oil well and preparation method thereof Download PDFInfo
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- CN117777986A CN117777986A CN202311762164.3A CN202311762164A CN117777986A CN 117777986 A CN117777986 A CN 117777986A CN 202311762164 A CN202311762164 A CN 202311762164A CN 117777986 A CN117777986 A CN 117777986A
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- drag reducer
- diatomite
- zinc oxide
- composite nano
- oil well
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- 239000002131 composite material Substances 0.000 title claims abstract description 69
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 50
- 239000003129 oil well Substances 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 90
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000011787 zinc oxide Substances 0.000 claims abstract description 45
- -1 methyl siloxane Chemical class 0.000 claims abstract description 24
- QTRSWYWKHYAKEO-UHFFFAOYSA-N 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-henicosafluorodecyl-tris(1,1,2,2,2-pentafluoroethoxy)silane Chemical compound FC(F)(F)C(F)(F)O[Si](OC(F)(F)C(F)(F)F)(OC(F)(F)C(F)(F)F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F QTRSWYWKHYAKEO-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000002156 mixing Methods 0.000 claims abstract description 23
- 239000000203 mixture Substances 0.000 claims abstract description 15
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 6
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 6
- 239000011737 fluorine Substances 0.000 claims abstract description 6
- 229910000077 silane Inorganic materials 0.000 claims abstract description 6
- 238000001354 calcination Methods 0.000 claims description 11
- 239000002243 precursor Substances 0.000 claims description 10
- ONDPHDOFVYQSGI-UHFFFAOYSA-N zinc nitrate Chemical compound [Zn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ONDPHDOFVYQSGI-UHFFFAOYSA-N 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- ZPEJZWGMHAKWNL-UHFFFAOYSA-L zinc;oxalate Chemical compound [Zn+2].[O-]C(=O)C([O-])=O ZPEJZWGMHAKWNL-UHFFFAOYSA-L 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 230000001603 reducing effect Effects 0.000 claims description 6
- ZOIORXHNWRGPMV-UHFFFAOYSA-N acetic acid;zinc Chemical compound [Zn].CC(O)=O.CC(O)=O ZOIORXHNWRGPMV-UHFFFAOYSA-N 0.000 claims description 4
- 239000004246 zinc acetate Substances 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 2
- 230000009467 reduction Effects 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 8
- 230000000052 comparative effect Effects 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000002791 soaking Methods 0.000 description 6
- 239000005909 Kieselgur Substances 0.000 description 4
- 239000011148 porous material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000013329 compounding Methods 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003937 drug carrier Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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- Colloid Chemistry (AREA)
Abstract
The invention relates to the technical field of oil well yield increase, and provides a high-efficiency composite nano drag reducer for an oil well and a preparation method thereof, wherein the high-efficiency composite nano drag reducer for the oil well comprises the following components in parts by weight: 5-10 parts of diatomite/zinc oxide composite material and 45-60 parts of fluorine-containing silane; the fluorine-containing silane consists of polytrifluoropropyl methyl siloxane and perfluoro decyl triethoxysilane; the preparation method of the efficient composite nano drag reducer for the oil well comprises the following steps: s1, mixing polytrifluoropropyl methyl siloxane and perfluorodecyl triethoxysilane to obtain a primary mixture; s2, adding diatomite/zinc oxide composite material into the initial mixture for ultrasonic mixing to obtain the high-efficiency composite nano drag reducer. Through the technical scheme, the problem that the drag reduction effect of the drag reducer for the oil well in the prior art is poor is solved.
Description
Technical Field
The invention relates to the technical field of oil well yield increase, in particular to an efficient composite nano drag reducer for an oil well and a preparation method thereof.
Background
With the continuous decline of conventional oil and gas resources, the development of low permeability reservoirs has become a serious issue in oilfield exploitation. The problems of difficult water injection, high-pressure underinjection and the like of the reservoirs are key problems which are urgently needed to be solved at present. After the nano material is gradually applied to the fields of composite materials, coatings, rubber, drug carriers and the like in recent years, the nano material is also attracting more attention as an emerging development trend of oilfield exploitation.
In the continuous production process of the oil well, deposits are easily formed in the near-wellbore zone, so that the yield of the oil well is reduced, and the reason for the low flowability of crude oil in a reservoir is the reason. At present, a method of adding a drag reducer is generally adopted to solve the problems, but the existing drag reducer has the defects of short drag reduction time and poor drag reduction effect.
Therefore, in order to obtain excellent drag reduction effect when a certain amount of drag reducer is injected into a reservoir microchannel, the development of a novel efficient drag reducer becomes an important subject to be researched urgently, and the method has important significance for improving the oil well yield and increasing the oil field stable yield.
Disclosure of Invention
The invention provides an efficient composite nano drag reducer for an oil well and a preparation method thereof, which solve the problem of poor drag reduction effect of the drag reducer for the oil well in the related technology.
The technical scheme of the invention is as follows:
the invention provides an efficient composite nano drag reducer for an oil well, which comprises the following components in parts by weight: 5-10 parts of diatomite/zinc oxide composite material and 45-60 parts of fluorine-containing silane; the fluorine-containing silane is composed of polytrifluoropropyl methyl siloxane and perfluorodecyl triethoxysilane.
As a further technical scheme, the raw materials of the diatomite/zinc oxide composite material comprise a zinc oxide precursor and diatomite.
As a further technical scheme, the zinc oxide precursor is one of zinc nitrate, zinc acetate and zinc oxalate.
As a further technical scheme, the mass ratio of the diatomite to the zinc oxide precursor is 3:2-4:1.
As a further technical scheme, the preparation method of the diatomite/zinc oxide composite material comprises the following steps: and mixing the zinc oxide precursor with diatomite, drying, and calcining in a reducing atmosphere to obtain the diatomite/zinc oxide composite material.
As a further technical scheme, the mixing time is 30-40 min, the calcining temperature is 400-450 ℃, and the calcining time is 1-2 h.
As a further technical scheme, the mass ratio of the polytrifluoropropyl methyl siloxane to the perfluorodecyl triethoxysilane is 4:6-6:4.
The invention also provides a preparation method of the efficient composite nano drag reducer for the oil well, which comprises the following steps:
s1, mixing polytrifluoropropyl methyl siloxane and perfluorodecyl triethoxysilane to obtain a primary mixture;
s2, adding diatomite/zinc oxide composite material into the initial mixture for ultrasonic mixing to obtain the high-efficiency composite nano drag reducer.
As a further technical scheme, in the step S1, the mixing time is 35-50 min.
As a further technical scheme, in the step S2, the power of ultrasonic mixing is 100-150W, and the time is 20-30 min.
The working principle and the beneficial effects of the invention are as follows:
1. according to the invention, the components of the efficient composite nano drag reducer for the oil well adopt diatomite/zinc oxide composite material, polytrifluoropropyl methyl siloxane and perfluoro decyl triethoxysilane, and the surface tension of the diatomite/zinc oxide composite material is reduced by compounding the polytrifluoropropyl methyl siloxane and perfluoro decyl triethoxysilane, so that the prepared drag reducer can break through a water film and a well wall shape under the action of multiple forces after being adsorbed in a core pore channel, so that strong adsorption is formed, the surface tension of the surface of the pore wall is reduced, and the drag reducing effect of the drag reducer is remarkably improved.
2. According to the preparation method, the diatomite/zinc oxide composite material is prepared by adjusting the mass ratio of diatomite to zinc oxide precursors and utilizing a calcination process, zinc oxide is attached to the surface of diatomite, the nano-scale porosity and dispersibility of the diatomite are increased while the diatomite is activated, and the attached zinc oxide can strengthen the pore structure of the diatomite, so that the drag reduction effect of the drag reducer is further improved.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the following examples and comparative examples, the particle size of diatomaceous earth was 8000 mesh; polytrifluoropropyl methyl siloxane, preferably pure, with a content of 99wt%; perfluoro decyl triethoxysilane, technical grade, content 99wt%.
Example 1
The efficient composite nano drag reducer for the oil well comprises the following components in parts by weight: 5 parts of diatomite/zinc oxide composite material, 18 parts of polytrifluoropropyl methyl siloxane and 27 parts of perfluorodecyl triethoxysilane;
the preparation method of the diatomite/zinc oxide composite material comprises the following steps:
mixing diatomite and zinc nitrate for 30min, drying, and calcining at 400 ℃ for 2h in a reducing atmosphere to obtain a diatomite/zinc oxide composite material; wherein the mass ratio of the diatomite to the zinc nitrate is 2:3;
the preparation method of the efficient composite nano drag reducer for the oil well comprises the following steps:
s1, mixing polytrifluoropropyl methyl siloxane and perfluorodecyl triethoxysilane for 35min to obtain a primary mixture;
s2, adding diatomite/zinc oxide composite material into the initial mixture, and performing ultrasonic mixing for 30min at 100 ℃ to obtain the high-efficiency composite nano drag reducer; wherein the mass of the initial mixture is 2 times of that of the diatomite/zinc oxide composite material.
Example 2
The efficient composite nano drag reducer for the oil well comprises the following components in parts by weight: 7 parts of diatomite/zinc oxide composite material, 20 parts of polytrifluoropropyl methyl siloxane and 30 parts of perfluorodecyl triethoxysilane;
the preparation method of the diatomite/zinc oxide composite material comprises the following steps:
mixing diatomite and zinc acetate for 35min, drying, and calcining at 450 ℃ for 1h in a reducing atmosphere to obtain a diatomite/zinc oxide composite material; wherein the mass ratio of the diatomite to the zinc acetate is 2:3;
the preparation method of the efficient composite nano drag reducer for the oil well comprises the following steps:
s1, mixing polytrifluoropropyl methyl siloxane and perfluorodecyl triethoxysilane for 40min to obtain a primary mixture;
s2, adding diatomite/zinc oxide composite material into the initial mixture, and carrying out ultrasonic mixing for 20min at 150W to obtain the high-efficiency composite nano drag reducer; wherein the mass of the initial mixture is 4 times of that of the diatomite/zinc oxide composite material.
Example 3
The efficient composite nano drag reducer for the oil well comprises the following components in parts by weight: 10 parts of diatomite/zinc oxide composite material, 24 parts of polytrifluoropropyl methyl siloxane and 36 parts of perfluorodecyl triethoxysilane;
the preparation method of the diatomite/zinc oxide composite material comprises the following steps:
mixing diatomite and zinc oxalate for 340min, drying, and calcining for 1h at 450 ℃ in a reducing atmosphere to obtain a diatomite/zinc oxide composite material; wherein the mass ratio of the diatomite to the zinc oxalate is 2:3;
the preparation method of the efficient composite nano drag reducer for the oil well comprises the following steps:
s1, mixing polytrifluoropropyl methyl siloxane and perfluorodecyl triethoxysilane for 50min to obtain a primary mixture;
s2, adding diatomite/zinc oxide composite material into the initial mixture, and performing ultrasonic mixing for 30min at 100W to obtain the high-efficiency composite nano drag reducer; wherein the mass of the initial mixture is 5 times of that of the diatomite/zinc oxide composite material.
Example 4
This example differs from example 3 only in that the mass ratio of diatomaceous earth to zinc oxalate is 5:1.
Example 5
This example differs from example 3 only in the addition of 36 parts of polytrifluoropropyl methyl siloxane and 24 parts of perfluorodecyl triethoxysilane.
Example 6
This example differs from example 3 only in that 30 parts of polytrifluoropropyl methyl siloxane and 30 parts of perfluorodecyl triethoxysilane are added.
Example 7
This example differs from example 6 only in that the mass ratio of diatomaceous earth to zinc oxalate is 4:1.
Example 8
This example differs from example 3 only in that the mass ratio of diatomaceous earth to zinc oxalate is 3:2.
Comparative example 1
The difference between this comparative example and example 3 is only that 60 parts of polytrifluoropropyl methyl siloxane were added without the addition of perfluorodecyl triethoxysilane.
Comparative example 2
The difference between this comparative example and example 3 is only that 60 parts of perfluorodecyl triethoxysilane are added without adding polytrifluoropropyl methyl siloxane.
Comparative example 3
The difference between this comparative example and example 3 is only that no diatomite/zinc oxide composite material was added and 10 parts of diatomite was added.
And (3) carrying out drag reduction effect test:
taking a core piece with the diameter of 25mm, respectively soaking the core piece in the aqueous solution of the high-efficiency composite nano drag reducer prepared in examples 1-8 and comparative examples 1-3, taking out the core piece after soaking the core piece at 80 ℃ for 24 hours, drying the core piece, performing water flooding test on the core piece before and after soaking the high-efficiency nano drag reducer, calculating the water flooding pressure reduction rate, and the result is shown in the following table, wherein the water flooding pressure reduction rate= [ (the water flooding pressure before soaking the high-efficiency nano drag reducer-the water flooding pressure after soaking the high-efficiency nano drag reducer)/the water flooding pressure before soaking the high-efficiency nano drag reducer ] ×100%.
The data of comparative examples 1-8 and comparative examples 1-2 show that the water driving pressure reduction rate of the high-efficiency composite nano drag reducer prepared in examples 1-8 is higher compared with that of comparative examples 1-2, and the components of the high-efficiency composite nano drag reducer are diatomite, zinc oxide, polytrifluoropropyl methyl siloxane and perfluoro decyl triethoxy silane, and the drag reducer drag effect can be remarkably improved by compounding the polytrifluoropropyl methyl siloxane and perfluoro decyl triethoxy silane.
The data of comparative examples 3-4, examples 7-8 and comparative example 3 show that the water driving pressure reduction rate of the high-efficiency composite nano drag reducer prepared in examples 7-8 is higher than that of examples 3-4 and comparative example 3, which shows that the diatomite/zinc oxide composite material prepared by the calcination process can further improve the drag reduction effect of the drag reducer by adjusting the mass ratio of diatomite to zinc oxide precursor.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (10)
1. The efficient composite nano drag reducer for the oil well is characterized by comprising the following components in parts by weight: 5-10 parts of diatomite/zinc oxide composite material and 45-60 parts of fluorine-containing silane; the fluorine-containing silane is composed of polytrifluoropropyl methyl siloxane and perfluorodecyl triethoxysilane.
2. The efficient composite nano drag reducer for oil well according to claim 1, wherein the raw materials of the diatomite/zinc oxide composite material comprise a zinc oxide precursor and diatomite.
3. The efficient composite nano drag reducer for oil well according to claim 2, wherein the zinc oxide precursor is one of zinc nitrate, zinc acetate and zinc oxalate.
4. The efficient composite nano drag reducer for oil wells, as claimed in claim 2, wherein the mass ratio of the diatomite to the zinc oxide precursor is 3:2-4:1.
5. The efficient composite nano drag reducer for oil wells according to claim 2, wherein the preparation method of the diatomite/zinc oxide composite material comprises the following steps: and mixing the zinc oxide precursor with diatomite, drying, and calcining in a reducing atmosphere to obtain the diatomite/zinc oxide composite material.
6. The efficient composite nano drag reducer for oil wells according to claim 5, wherein the mixing time is 30-40 min, the calcining temperature is 400-450 ℃, and the calcining time is 1-2 h.
7. The efficient composite nano drag reducer for oil wells, as claimed in claim 1, wherein the mass ratio of the polytrifluoropropyl methyl siloxane to the perfluorodecyl triethoxysilane is 4:6-6:4.
8. The preparation method of the efficient composite nano drag reducer for the oil well, which is disclosed in any one of claims 1 to 7, is characterized by comprising the following steps:
s1, mixing polytrifluoropropyl methyl siloxane and perfluorodecyl triethoxysilane to obtain a primary mixture;
s2, adding diatomite/zinc oxide composite material into the initial mixture for ultrasonic mixing to obtain the high-efficiency composite nano drag reducer.
9. The method for preparing the efficient composite nano drag reducer for the oil well, which is disclosed in claim 8, is characterized in that in the step S1, the mixing time is 35-50 min.
10. The method for preparing the efficient composite nano drag reducer for the oil well, which is disclosed in claim 8, is characterized in that in the step S2, the ultrasonic mixing power is 100-150W, and the time is 20-30 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311762164.3A CN117777986A (en) | 2023-12-20 | 2023-12-20 | Efficient composite nano drag reducer for oil well and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311762164.3A CN117777986A (en) | 2023-12-20 | 2023-12-20 | Efficient composite nano drag reducer for oil well and preparation method thereof |
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| Publication Number | Publication Date |
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| CN117777986A true CN117777986A (en) | 2024-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311762164.3A Pending CN117777986A (en) | 2023-12-20 | 2023-12-20 | Efficient composite nano drag reducer for oil well and preparation method thereof |
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| Country | Link |
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| CN (1) | CN117777986A (en) |
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- 2023-12-20 CN CN202311762164.3A patent/CN117777986A/en active Pending
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