CN115029119B - High-temperature salt-resistant foaming agent and preparation method and application thereof - Google Patents
High-temperature salt-resistant foaming agent and preparation method and application thereof Download PDFInfo
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- CN115029119B CN115029119B CN202110237409.5A CN202110237409A CN115029119B CN 115029119 B CN115029119 B CN 115029119B CN 202110237409 A CN202110237409 A CN 202110237409A CN 115029119 B CN115029119 B CN 115029119B
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- 239000004088 foaming agent Substances 0.000 title claims abstract description 49
- 150000003839 salts Chemical class 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 229930182478 glucoside Natural products 0.000 claims abstract description 36
- 150000008131 glucosides Chemical class 0.000 claims abstract description 35
- 229940051841 polyoxyethylene ether Drugs 0.000 claims abstract description 35
- 229920000056 polyoxyethylene ether Polymers 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 150000002191 fatty alcohols Chemical class 0.000 claims abstract description 27
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 230000033558 biomineral tissue development Effects 0.000 claims abstract description 11
- 238000005187 foaming Methods 0.000 claims abstract description 11
- 239000002738 chelating agent Substances 0.000 claims abstract description 7
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 33
- JPZROSNLRWHSQQ-UHFFFAOYSA-N furan-2,5-dione;prop-2-enoic acid Chemical group OC(=O)C=C.O=C1OC(=O)C=C1 JPZROSNLRWHSQQ-UHFFFAOYSA-N 0.000 claims description 19
- 150000001768 cations Chemical class 0.000 claims description 13
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 10
- 125000000217 alkyl group Chemical group 0.000 claims description 5
- 229910001425 magnesium ion Inorganic materials 0.000 claims description 4
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 claims description 3
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- 230000002209 hydrophobic effect Effects 0.000 claims description 2
- 125000004417 unsaturated alkyl group Chemical group 0.000 claims description 2
- 238000010795 Steam Flooding Methods 0.000 abstract description 28
- 230000000694 effects Effects 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 39
- 239000000203 mixture Substances 0.000 description 25
- 230000000052 comparative effect Effects 0.000 description 22
- 239000006260 foam Substances 0.000 description 22
- 238000003756 stirring Methods 0.000 description 20
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- 238000002156 mixing Methods 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 12
- 238000012360 testing method Methods 0.000 description 9
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 238000011084 recovery Methods 0.000 description 7
- 239000000243 solution Substances 0.000 description 5
- 230000005465 channeling Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 239000008398 formation water Substances 0.000 description 4
- 238000010793 Steam injection (oil industry) Methods 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 239000000295 fuel oil Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000009472 formulation Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- VCUFZILGIRCDQQ-KRWDZBQOSA-N N-[[(5S)-2-oxo-3-(2-oxo-3H-1,3-benzoxazol-6-yl)-1,3-oxazolidin-5-yl]methyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C1O[C@H](CN1C1=CC2=C(NC(O2)=O)C=C1)CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F VCUFZILGIRCDQQ-KRWDZBQOSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- VVTSZOCINPYFDP-UHFFFAOYSA-N [O].[Ar] Chemical compound [O].[Ar] VVTSZOCINPYFDP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- -1 ether glucoside Chemical class 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
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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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/584—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific surfactants
-
- 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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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
- Saccharide Compounds (AREA)
Abstract
The invention belongs to the field of oilfield chemistry, and particularly relates to a high-temperature salt-resistant foaming agent, and a preparation method and application thereof. The foaming agent comprises the following components: 30-40% of fatty alcohol polyoxyethylene ether glucoside and C in percentage by mass 20~24 20% -30% of AOS, 2% -3% of chelating agent, 10% -15% of low-carbon alcohol and water. The foaming agent has good high temperature resistance and salt resistance, has strong foaming capacity and stable performance under the conditions of high temperature and high mineralization, is applied to thick oil steam flooding, has remarkable effect and can meet the industry requirements.
Description
Technical Field
The invention belongs to the field of oilfield chemistry, and particularly relates to a high-temperature salt-resistant foaming agent, and a preparation method and application thereof.
Background
At present, the main mode of heavy oil development is steam injection thermal recovery, and steam flooding oil recovery is a thermal recovery method adopted for further improving recovery ratio after the heavy oil reservoir is subjected to steam huff and puff oil recovery. The steam flooding oil extraction is to inject high-dryness steam into the oil layer continuously through the injection well, and the steam heats the oil layer continuously, so that the viscosity of the stratum crude oil is greatly reduced. The injected steam becomes hot fluid in the formation, drives the crude oil around the production well, and is produced to the surface.
However, the development effect of the steam flooding is seriously affected by the ineffective channeling of the steam in a low residual oil saturation zone, and the biggest problem encountered by the steam flooding is how to inhibit the 'steam channeling' and the 'overburden' of the steam, so that the swept volume of the steam is enlarged. At present, the practice of mines at home and abroad proves that the sweep efficiency and displacement efficiency of steam injection can be improved by injecting nitrogen and a high-temperature foam system into the steam. By adding the high-temperature foaming agent and nitrogen, foam is generated in stratum pore channels, and the high-strength foam film enables the seepage capability of gas phase to be rapidly reduced, high-permeability layers or large pore channels are plugged, the displacement volume is increased, the swept area is increased, and the oil reservoir development effect is improved.
The patent CN107903886A, CN110078865A, CN108084981A, CN102676145A provides a high-temperature foaming agent and a preparation method thereof, has the characteristics of good thermal stability and strong foaming and plugging properties, and plays a positive role in steam injection thermal recovery steam channeling prevention of a heavy oil reservoir. However, the compatibility problem of the high-temperature foaming agent and the formation water is not mentioned in the above patents, and the used raw materials are mainly anionic surfactants, and precipitation is generated when the formation water with high mineralization degree is encountered, so that the foaming performance and failure are seriously affected. Therefore, it is highly desirable to invent a foaming agent for steam flooding which is resistant to high temperature and high mineralization.
Disclosure of Invention
The invention mainly aims to provide a high-temperature salt-resistant foaming agent, a preparation method and application thereof, and the foaming agent has good high-temperature resistance and salt resistance, has strong foaming capacity and stable performance under the conditions of high temperature and high mineralization, is applied to thick oil steam flooding, has remarkable action effect and can meet the industrial requirements.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the invention provides a high temperature salt-resistant foaming agent, which comprisesThe following components: 30-40% of fatty alcohol polyoxyethylene ether glucoside and C in percentage by mass 20～24 20% -30% of AOS, 2% -3% of chelating agent, 10% -15% of low-carbon alcohol and water.
Further, the molecular formula of the fatty alcohol-polyoxyethylene ether glucoside is as follows:
(C 6 H 11 O 5 ) m (CH 2 CH 2 O) n OR 1
wherein R is 1 Is an alkyl group having 12 to 14 carbons, m is 2 or 3, and n is 3 or 4. It will be appreciated that R 1 May be an alkyl group having 12, 13, or 14 carbons.
Further, the C 20～24 The molecular formula of AOS is as follows:
R 2 -CH＝CH-(CH 2 )-SO 3 M
wherein R is 2 Is an alkyl group having 17 to 21 carbons, M is selected from Na + 、K + 、NH 4 + Any one of the cations.
Further, the C 20～24 AOS is an unsaturated alkyl sulfonate with a hydrophobic chain of 20-24 carbon atoms.
Further, the chelating agent is MA/AA.
Further, the low-carbon alcohol is one or more of methanol, ethanol and isopropanol.
The invention also provides a preparation method of the high-temperature salt-resistant foaming agent, which comprises the steps of dissolving a chelating agent in water at 40-50 ℃, uniformly stirring, adding fatty alcohol-polyoxyethylene ether glucoside and low-carbon alcohol, fully and uniformly stirring, adding C20-24 AOS, and uniformly stirring.
The invention also provides application of the high-temperature salt-resistant foaming agent in thick oil steam flooding.
Further, when the foaming agent is compatible with water with the mineralization degree of 0-200000mg/L and the calcium-magnesium ion concentration of less than 5000mg/L, the foaming volume is more than or equal to 200mL, the half-life period is more than or equal to 20s, the foaming volume is more than or equal to 200mL, the half-life period is more than or equal to 18s, and the resistance factor is more than or equal to 20 after the temperature resistance is 300 ℃.
Compared with the prior art, the invention has the following advantages:
the invention relates to a high-temperature salt-resistant foaming agent, which mainly comprises fatty alcohol polyoxyethylene ether glucoside and C 20～ 24 The AOS and Gao Wenao resistant mixture is compounded. Fatty alcohol polyoxyethylene ether glucoside and C 20～24 The foam performance of the AOS is very good, the heat resistance and the salt resistance are strong, and the stability of the foam is enhanced by compounding the foam and the salt resistance. For highly mineralized formation water, the chelating agent can chelate multivalent ions in the water, which helps to generate and stabilize foam.
The high-temperature salt-resistant foaming agent disclosed by the invention is wide in application conditions, high in mineralization resistance and capable of resisting formation water with the mineralization of 200000mg/L and the calcium-magnesium ion concentration of 5000mg/L. The foaming agent disclosed by the invention is simple in production process, easy in raw material purchase, harmless to the environment and personnel from production to use, and meets the environment-friendly requirement.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. 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 exemplary embodiments according to the present invention. As used herein, the singular forms also are intended to include the plural forms unless the context clearly indicates otherwise, and furthermore, 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, and/or combinations thereof.
In order to enable those skilled in the art to more clearly understand the technical scheme of the present invention, the technical scheme of the present invention will be described in detail with reference to specific embodiments.
Example 1
280kg of water is added into a reaction kettle, 20kg of Gao Wenao mixture MA/AA is added at 50 ℃ and stirred and mixed uniformly; then 400kg of fatty alcohol polyoxyethylene ether glucoside is addedAnd 100kg of methanol, and adding 200kgC after fully and uniformly stirring 20～24 And (3) stirring and uniformly mixing the AOS to obtain the high-temperature salt-resistant foaming agent for thick oil steam flooding.
The molecular formula of the fatty alcohol polyoxyethylene ether glucoside is as follows: (C) 6 H 11 O 5 ) 2 (CH 2 CH 2 O) 3 OC 12 H 25 。
C 20～24 The molecular formula of AOS is as follows: c (C) 17 H 35 -CH＝CH-(CH 2 )-SO 3 M (M is selected from Na) + 、K + 、NH 4 + Any cation of (b)
Example 2
270kg of water is added into a reaction kettle, 30kg of Gao Wenao mixture MA/AA is added at 48 ℃, and the mixture is stirred and mixed uniformly; then 380kg of fatty alcohol polyoxyethylene ether glucoside and 100kg of ethanol are added, and after being fully and uniformly stirred, 220kgC is finally added 20～24 And (3) stirring and uniformly mixing the AOS to obtain the high-temperature salt-resistant foaming agent for thick oil steam flooding.
The molecular formula of the fatty alcohol polyoxyethylene ether glucoside is as follows: (C) 6 H 11 O 5 ) 2 (CH 2 CH 2 O) 4 OC 13 H 27 。
C 20～24 The molecular formula of AOS is as follows: c (C) 18 H 37 -CH＝CH-(CH 2 )-SO 3 M (M is selected from Na) + 、K + 、NH 4 + Any cation of (b)
Example 3
280kg of water is added into a reaction kettle, 20kg of Gao Wenao mixture MA/AA is added at 46 ℃, and the mixture is stirred and mixed uniformly; then 360kg of fatty alcohol polyoxyethylene ether glucoside and 100kg of isopropanol are added, and after being fully and uniformly stirred, 240 g kgC is finally added 20～24 And (3) stirring and uniformly mixing the AOS to obtain the high-temperature salt-resistant foaming agent for thick oil steam flooding.
The molecular formula of the fatty alcohol polyoxyethylene ether glucoside is as follows: (C) 6 H 11 O 5 ) 2 (CH 2 CH 2 O) 3 OC 14 H 29 。
C 20～24 The molecular formula of AOS is as follows: c (C) 19 H 39 -CH＝CH-(CH 2 )-SO 3 M (M is selected from Na) + 、K + 、NH 4 + Any cation of (b)
Example 4
270kg of water is added into a reaction kettle, 30kg of Gao Wenao mixture MA/AA is added at the temperature of 44 ℃, and the mixture is stirred and mixed uniformly; then 340kg of fatty alcohol polyoxyethylene ether glucoside (R) 1 =12, m=3, n=4), 50kg of methanol and 50kg of ethanol, and after being fully and uniformly stirred, 260kgC is finally added 20～24 AOS(R 2 =20), stirring and mixing uniformly to obtain the high-temperature salt-resistant foaming agent for thick oil steam flooding.
The molecular formula of the fatty alcohol polyoxyethylene ether glucoside is as follows: (C) 6 H 11 O 5 ) 3 (CH 2 CH 2 O) 4 OC 12 H 25 。
C 20～24 The molecular formula of AOS is as follows: c (C) 20 H 41 -CH＝CH-(CH 2 )-SO 3 M (M is selected from Na) + 、K + 、NH 4 + Any cation of (b)
Example 5
280kg of water is added into a reaction kettle, 20kg of Gao Wenao mixture MA/AA is added at the temperature of 42 ℃ and stirred and mixed uniformly; then adding 320kg of fatty alcohol polyoxyethylene ether glucoside, 50kg of methanol and 50kg of isopropanol, fully and uniformly stirring, and finally adding 280kgC 20～24 AOS(R 2 =21), stirring and mixing uniformly to obtain the high-temperature salt-resistant foaming agent for thick oil steam flooding.
The molecular formula of the fatty alcohol polyoxyethylene ether glucoside is as follows: (C) 6 H 11 O 5 ) 3 (CH 2 CH 2 O) 3 OC 13 H 27 。
C 20～24 The molecular formula of AOS is as follows: c (C) 21 H 43 -CH＝CH-(CH 2 )-SO 3 M (M is selected from Na) + 、K + 、NH 4 + Any one of cations)
Example 6
270kg of water is added into a reaction kettle, 30kg of Gao Wenao mixture MA/AA is added at the temperature of 40 ℃, and the mixture is stirred and mixed uniformly; then 300kg of fatty alcohol polyoxyethylene ether glucoside (R) 1 =14, m=3, n=4), 50kg ethanol, 50kg isopropanol, and after sufficiently stirring uniformly, 300kgC was finally added 20～24 AOS(R 2 =21), stirring and mixing uniformly to obtain the high-temperature salt-resistant foaming agent for thick oil steam flooding.
The molecular formula of the fatty alcohol polyoxyethylene ether glucoside is as follows: (C) 6 H 11 O 5 ) 3 (CH 2 CH 2 O) 4 OC 14 H 29 。
C 20～24 The molecular formula of AOS is as follows: c (C) 21 H 43 -CH＝CH-(CH 2 )-SO 3 M (M is selected from Na) + 、K + 、NH 4 + Any cation of (b)
The components and the proportion of the high-temperature salt-resistant foaming agent for thick oil steam flooding are determined on the basis of a large number of experiments, and any change can cause disqualification of detection indexes.
Comparative example 1
Adding 300kg of water into a reaction kettle, adding 400kg of fatty alcohol-polyoxyethylene ether glucoside and 100kg of methanol at 50 ℃, fully and uniformly stirring, and then adding 200kgC 20～24 And (3) stirring and uniformly mixing the AOS to obtain the high-temperature salt-resistant foaming agent for thick oil steam flooding.
The molecular formula of the fatty alcohol polyoxyethylene ether glucoside is as follows: (C) 6 H 11 O 5 ) 2 (CH 2 CH 2 O) 3 OC 12 H 25 。
C 20～24 The molecular formula of AOS is as follows: c (C) 17 H 35 -CH＝CH-(CH 2 )-SO 3 M (M is selected from Na) + 、K + 、NH 4 + Any cation of (b)
Comparative example 1 is a high temperature salt-resistant foaming agent for thick oil vapor flooding obtained by removing Gao Wenao-resistant mixture MA/AA in the formula of example 1, wherein the amount of Gao Wenao-resistant mixture MA/AA is supplemented by water, and the foam performance, the temperature resistance and the resistance factor do not reach the standards.
Comparative example 2
680kg of water is added into a reaction kettle, 20kg of Gao Wenao mixture MA/AA is added at 50 ℃ and stirred and mixed uniformly; then 100kg of methanol is added, and after being fully and uniformly stirred, 200kgC is finally added 20～24 And (3) stirring and uniformly mixing the AOS to obtain the high-temperature salt-resistant foaming agent for thick oil steam flooding.
Comparative example 2 is a high temperature salt-resistant foaming agent for thickened oil steam flooding obtained by removing the fatty alcohol-polyoxyethylene ether glucoside in the formula of example 1, the amount of the fatty alcohol-polyoxyethylene ether glucoside is supplemented by water, and the foam performance, the temperature resistance and the resistance factor do not reach the standards.
The C is 20～24 The molecular formula of AOS is as follows: c (C) 17 H 35 -CH＝CH-(CH 2 )-SO 3 M (M is selected from Na) + 、K + 、NH 4 + Any cation of (b)
Comparative example 3
480kg of water is added into a reaction kettle, 20kg of Gao Wenao mixture MA/AA is added at 50 ℃, and the mixture is stirred and mixed uniformly; next, 400kg of fatty alcohol polyoxyethylene ether glucoside (R) 1 =12, m=2, n=3) and 100kg of methanol, and after being sufficiently and uniformly stirred, the high-temperature salt-resistant foaming agent for thick oil steam flooding is obtained.
Comparative example 3 was prepared by removing C from the formulation of example 1 20～24 High-temperature salt-resistant foaming agent for thickened oil steam flooding obtained by AOS (argon oxygen decarburization), C 20～24 The amount of AOS is supplemented with water, and the foam performance, the temperature resistance and the resistance factor do not reach the standards.
The molecular formula of the fatty alcohol polyoxyethylene ether glucoside is as follows: (C) 6 H 11 O 5 ) 2 (CH 2 CH 2 O) 3 OC 12 H 25 。
Comparative example 4
Adding 281kg of water into a reaction kettle, adding 19kg of Gao Wenao mixture MA/AA at 50 ℃, and stirring and uniformly mixing; then 400kg of fatty alcohol-polyoxyethylene are addedAfter the ether glucoside and 100kg of methanol are fully and uniformly stirred, 200kgC is finally added 20～24 And (3) stirring and uniformly mixing the AOS to obtain the high-temperature salt-resistant foaming agent for thick oil steam flooding.
Comparative example 4 shows that the MA/AA of the Gao Wenao resistant mixture in the formula of example 1 deviates from the range of 2% -3%, namely 19kg of Gao Wenao resistant mixture MA/AA (1.9%) is added to obtain the high-temperature salt-resistant foaming agent for thick oil steam flooding, the added amount of Gao Wenao resistant mixture MA/AA is removed from water, and the foam performance, the temperature resistance performance and the resistance factor do not reach the standards.
The molecular formula of the fatty alcohol polyoxyethylene ether glucoside is as follows: (C) 6 H 11 O 5 ) 2 (CH 2 CH 2 O) 3 OC 12 H 25 。
C 20～24 The molecular formula of AOS is as follows: c (C) 17 H 35 -CH＝CH-(CH 2 )-SO 3 M (M is selected from Na) + 、K + 、NH4 + Any cation of (b)
Comparative example 5
Adding 230kg of water into a reaction kettle, adding 20kg of Gao Wenao mixture MA/AA at 50 ℃, and stirring and uniformly mixing; then 450kg of fatty alcohol polyoxyethylene ether glucoside and 100kg of methanol are added, and after being fully and uniformly stirred, 200kgC is finally added 20～24 And (3) stirring and uniformly mixing the AOS to obtain the high-temperature salt-resistant foaming agent for thick oil steam flooding.
Comparative example 5 is that the fatty alcohol-polyoxyethylene ether glucoside in the formula of example 1 exceeds the range of 30% -40%, namely 450kg of fatty alcohol-polyoxyethylene ether glucoside (45%) is added to obtain the high-temperature salt-resistant foaming agent for thick oil steam flooding, and the added fatty alcohol-polyoxyethylene ether glucoside is removed from water, so that the foam performance, the temperature resistance and the resistance factor do not reach the standards.
The molecular formula of the fatty alcohol polyoxyethylene ether glucoside is as follows: (C) 6 H 11 O 5 ) 2 (CH 2 CH 2 O) 3 OC 12 H 25 。
C 20～24 The molecular formula of AOS is as follows: c (C) 17 H 35 -CH＝CH-(CH 2 )-SO 3 M (M is selected from Na) + 、K + 、NH 4 + Any cation of (c) in the formula (i).
Comparative example 6
330kg of water is added into a reaction kettle, 20kg of Gao Wenao mixture MA/AA is added at 50 ℃ and stirred and mixed uniformly; next, 400kg of fatty alcohol polyoxyethylene ether glucoside (R) 1 =12, m=2, n=3) and 100kg of methanol, and after being sufficiently stirred uniformly, 150kgC was finally added 20～24 AOS(R 2 =17), stirring and mixing uniformly to obtain the high-temperature salt-resistant foaming agent for thick oil steam flooding.
Comparative example 6 is C in the formulation of example 1 20～24 The AOS deviates from the range of 20% -30%, i.e. 150kgC is added 20～24 AOS (15%), the obtained high-temperature salt-resistant foaming agent for thick oil steam flooding, and little added C 20～24 The amount of AOS is supplemented with water, and the foam performance, the temperature resistance and the resistance factor do not reach the standards.
The molecular formula of the fatty alcohol polyoxyethylene ether glucoside is as follows: (C) 6 H 11 O 5 ) 2 (CH 2 CH 2 O) 3 OC 12 H 25 。
C 20～24 The molecular formula of AOS is as follows: c (C) 17 H 35 -CH＝CH-(CH 2 )-SO 3 M (M is selected from Na) + 、K + 、NH 4 + Any cation of (b)
Comparative example 7
Comparative example 7 is a high temperature foaming agent on the market, has poor compatibility with water with the mineralization of 200000mg/L, and has foam performance, temperature resistance and resistance factor which do not reach the standard.
Performance testing
Test conditions:
1. test instrument: high-temperature high-pressure foam scanner, rock core displacement process, high-temperature high-pressure reactor.
2. Test water: water is injected into a certain area of the victory oil field, the mineralization degree is 200000mg/L, and the calcium and magnesium ion concentration is 5000mg/L.
The testing method comprises the following steps:
1. foaming volume and half-life test:
1) And (3) injecting water into a certain area of a victory oil field to prepare a 0.5% solution by using a high-temperature salt-resistant foaming agent for thick oil steam flooding, taking 200.0mL of the prepared solution, placing the solution in a sample container of a high-temperature high-pressure foam scanner, injecting 100mL of sample into a sample cavity, setting the temperature to 200 ℃, filling nitrogen to 2MPa, keeping the temperature for 30min, and heating to the required temperature.
2) Adjusting the gas mass flow meter controller to 200cm 3 And (3) injecting nitrogen at the speed of/min, stopping injecting nitrogen when the foam volume reaches 200mL, recording the maximum volume of the foam as an initial value, and recording the corresponding time when the volume of the foam is reduced to half of the initial value, namely the half-life of the foam.
2. Temperature resistance test:
200mL of high-temperature salt-resistant foaming agent aqueous solution for the thickened oil vapor flooding is prepared by injecting water into a certain block of a victory oil field, the solution is placed into a high-pressure container, nitrogen is filled into the high-pressure container to discharge air, a valve of the high-pressure container is closed, the temperature is raised to 300 ℃, the temperature is kept for 12 hours, the solution is cooled and taken out, and the foaming volume and the foam half-life of the high-temperature salt-resistant foaming agent for the thickened oil vapor flooding are measured at 200 ℃.
3. Resistance factor:
tested according to the method of 4.2.7 in Q/SH1020 2372-2020.
The high temperature salt resistant foaming agents for thickened oil vapor flooding obtained in the above examples 1 to 6 and comparative examples 1 to 7 were subjected to the tests of foam properties, resistance factors, and temperature resistance according to the above test methods, and the test results are shown in tables 1 to 3.
TABLE 1 high temperature salt resistant foaming agent for thickened oil vapor flooding Pre-temperature resistance
TABLE 2 resistance factor of high temperature salt resistant foamer for thick oil vapor flooding
| Sample name | Resistance factor |
| Example 1 | 26 |
| Example 2 | 23 |
| Example 3 | 22 |
| Example 4 | 24 |
| Example 5 | 22 |
| Example 6 | 25 |
| Comparative example 1 | 10 |
| Comparative example 2 | 15 |
| Comparative example 3 | 14 |
| Comparative example 4 | 15 |
| Comparative example 5 | 14 |
| Comparative example 6 | 16 |
| Comparative example 7 | 8 |
TABLE 3 high temperature salt resistant foaming agent for thickened oil vapor flooding post temperature resistance
As can be seen from the above tables 1 to 3, the formula provided by the invention is composed of fatty alcohol polyoxyethylene ether glucoside and C 20～24 Under the synergistic effect of AOS and Gao Wenao mixture MA/AA, the high-temperature salt-resistant foaming agent for thickened oil steam flooding has good compatibility with stratum water with the mineralization degree of 200000mg/L, can still keep higher foaming performance and resistance factor after being subjected to temperature resistance of 300 ℃, can effectively inhibit steam channeling and overburden of steam under the effect of nitrogen, and fully plays the role of steam displacement, thereby greatly improving the recovery ratio of crude oil.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (2)
1. A high temperature salt-resistant foaming agent, characterized by comprising the following components: by mass of30-40% of fatty alcohol polyoxyethylene ether glucoside and C 20 ～ 24 20% -30% of AOS, 2% -3% of chelating agent, 10% -15% of low-carbon alcohol and water;
the molecular formula of the fatty alcohol polyoxyethylene ether glucoside is as follows:
(C 6 H 11 O 5 ) m (CH 2 CH 2 O) n OR 1
wherein R is 1 Is alkyl having 12 to 14 carbons, m is 2 or 3, n is 3 or 4;
the C is 20～24 The molecular formula of AOS is as follows:
R 2 -CH＝CH-(CH 2 )-SO 3 M
wherein R is 2 Is an alkyl group having 17 to 21 carbons, M is selected from Na + 、K + 、NH 4 + Any cation of (a);
the C is 20～24 AOS is unsaturated alkyl sulfonate with a hydrophobic chain of 20-24 carbon atoms;
the chelating agent is MA/AA;
the low-carbon alcohol is one or more of methanol, ethanol and isopropanol.
2. The use of the high temperature salt resistant foaming agent of claim 1 in a thick oil vapor flooding; when the foaming agent is compatible with water with the mineralization degree of 0-200000mg/L and the calcium-magnesium ion concentration of less than 5000mg/L, the foaming volume is more than or equal to 200mL, the half life is more than or equal to 20s, the foaming volume is more than or equal to 200mL, the half life is more than or equal to 18s, and the resistance factor is more than or equal to 20 after the temperature resistance is 300 ℃.
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| US4643256A (en) * | 1985-03-18 | 1987-02-17 | Shell Oil Company | Steam-foaming surfactant mixtures which are tolerant of divalent ions |
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| CN112159650B (en) * | 2020-11-23 | 2022-03-18 | 山东新港化工有限公司 | High-temperature-resistant viscosity-reduction foaming agent for thick oil steam chemical flooding and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 环境友好型泡沫除尘剂协同试验研究;孟庆国;周茵;兰文龙;石景文;张道鹏;;矿业研究与开发(04);第105-110页 * |
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