CN115960592B - Foaming agent composition for thermal recovery plugging of thickened oil and preparation method and application thereof - Google Patents
Foaming agent composition for thermal recovery plugging of thickened oil and preparation method and application thereof Download PDFInfo
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- CN115960592B CN115960592B CN202111172420.4A CN202111172420A CN115960592B CN 115960592 B CN115960592 B CN 115960592B CN 202111172420 A CN202111172420 A CN 202111172420A CN 115960592 B CN115960592 B CN 115960592B
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- 239000000203 mixture Substances 0.000 title claims abstract description 77
- 238000011084 recovery Methods 0.000 title claims abstract description 71
- 239000004088 foaming agent Substances 0.000 title claims abstract description 67
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000003921 oil Substances 0.000 claims abstract description 79
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 47
- 229920000570 polyether Polymers 0.000 claims abstract description 47
- 239000004094 surface-active agent Substances 0.000 claims abstract description 37
- KWIUHFFTVRNATP-UHFFFAOYSA-N Betaine Natural products C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 claims abstract description 34
- ZQTYRTSKQFQYPQ-UHFFFAOYSA-N trisiloxane Chemical class [SiH3]O[SiH2]O[SiH3] ZQTYRTSKQFQYPQ-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 31
- 229960003237 betaine Drugs 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000003945 anionic surfactant Substances 0.000 claims abstract description 15
- 239000000295 fuel oil Substances 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims abstract description 11
- 239000002280 amphoteric surfactant Substances 0.000 claims abstract description 8
- 150000002500 ions Chemical class 0.000 claims abstract description 4
- KWIUHFFTVRNATP-UHFFFAOYSA-O N,N,N-trimethylglycinium Chemical compound C[N+](C)(C)CC(O)=O KWIUHFFTVRNATP-UHFFFAOYSA-O 0.000 claims abstract 9
- 239000002202 Polyethylene glycol Substances 0.000 claims description 53
- 229920001223 polyethylene glycol Polymers 0.000 claims description 53
- 125000000217 alkyl group Chemical group 0.000 claims description 45
- 239000006260 foam Substances 0.000 claims description 45
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 25
- 239000003054 catalyst Substances 0.000 claims description 25
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 24
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 claims description 24
- -1 ammonium ions Chemical class 0.000 claims description 23
- 150000002148 esters Chemical class 0.000 claims description 22
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 21
- 239000002253 acid Substances 0.000 claims description 21
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 20
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 18
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 18
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 15
- 150000002191 fatty alcohols Chemical class 0.000 claims description 14
- 229910052757 nitrogen Inorganic materials 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 11
- RZXLPPRPEOUENN-UHFFFAOYSA-N Chlorfenson Chemical compound C1=CC(Cl)=CC=C1OS(=O)(=O)C1=CC=C(Cl)C=C1 RZXLPPRPEOUENN-UHFFFAOYSA-N 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000011259 mixed solution Substances 0.000 claims description 10
- 239000000243 solution Substances 0.000 claims description 10
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 9
- 229940117986 sulfobetaine Drugs 0.000 claims description 9
- 150000007942 carboxylates Chemical class 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 6
- 238000001179 sorption measurement Methods 0.000 claims description 6
- 230000003213 activating effect Effects 0.000 claims description 5
- 125000003118 aryl group Chemical group 0.000 claims description 5
- 239000006227 byproduct Substances 0.000 claims description 5
- 238000004821 distillation Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 5
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 238000003786 synthesis reaction Methods 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 229910001420 alkaline earth metal ion Inorganic materials 0.000 claims description 4
- 125000005189 alkyl hydroxy group Chemical group 0.000 claims description 4
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims description 4
- 239000011976 maleic acid Substances 0.000 claims description 4
- 229910052697 platinum Inorganic materials 0.000 claims description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 4
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- 125000001931 aliphatic group Chemical group 0.000 claims description 3
- MRUAUOIMASANKQ-UHFFFAOYSA-N cocamidopropyl betaine Chemical compound CCCCCCCCCCCC(=O)NCCC[N+](C)(C)CC([O-])=O MRUAUOIMASANKQ-UHFFFAOYSA-N 0.000 claims description 3
- 229940073507 cocamidopropyl betaine Drugs 0.000 claims description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 2
- 229910052783 alkali metal Inorganic materials 0.000 claims description 2
- 229910001413 alkali metal ion Inorganic materials 0.000 claims description 2
- 150000001340 alkali metals Chemical class 0.000 claims description 2
- 239000002923 metal particle Substances 0.000 claims description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 2
- 125000006527 (C1-C5) alkyl group Chemical group 0.000 claims 1
- PSBDWGZCVUAZQS-UHFFFAOYSA-N (dimethylsulfonio)acetate Chemical compound C[S+](C)CC([O-])=O PSBDWGZCVUAZQS-UHFFFAOYSA-N 0.000 claims 1
- 230000002194 synthesizing effect Effects 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 10
- 239000007924 injection Substances 0.000 description 10
- 238000005187 foaming Methods 0.000 description 9
- 230000005465 channeling Effects 0.000 description 8
- 230000000903 blocking effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- 238000011161 development Methods 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 230000033558 biomineral tissue development Effects 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 125000004432 carbon atom Chemical group C* 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 2
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 description 2
- OCBFFGCSTGGPSQ-UHFFFAOYSA-N [CH2]CC Chemical compound [CH2]CC OCBFFGCSTGGPSQ-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910001424 calcium ion Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 229910001425 magnesium ion Inorganic materials 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229910001414 potassium ion Inorganic materials 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
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- 238000011065 in-situ storage Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
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- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
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- 125000001424 substituent group Chemical group 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
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Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
Abstract
The invention relates to a foaming agent composition for thermal recovery plugging of thickened oil, and a preparation method and application thereof. The foaming agent composition for thermal recovery plugging of the thickened oil comprises the following components in parts by weight: 0.2-10 parts of polyether anionic surfactant; 0.2 to 10 parts of polyether modified trisiloxane gemini surfactant; 0.1 to 5 parts of betaine type amphoteric surfactant; 75 to 99.5 portions of water. The preparation method of the foaming agent composition for thermal recovery plugging of the thickened oil comprises the following steps: (1) Synthesizing a polyether modified trisiloxane gemini surfactant; (2) And uniformly mixing the formula amount of polyether anionic surfactant, polyether modified trisiloxane gemini surfactant, betaine type amphoteric ion surfactant and water to obtain the foaming agent composition for thermal recovery and plugging of the thickened oil. The invention also discloses application of the foaming agent composition in the thermal recovery plugging process of the heavy oil reservoir.
Description
Technical Field
The invention belongs to the field of thickened oil exploitation, and particularly relates to a foaming agent composition for thermal recovery plugging of thickened oil, and a preparation method and application thereof.
Background
The thick oil resources in China are rich in reserves, are influenced by high viscosity, high condensation point and the like of the thick oil, and mainly adopt heat. Along with development progress, most heavy oil reservoirs in oil fields such as victory, xinjiang, liaohe and the like enter a high-round throughput stage. The steam is seriously covered after the multi-pass huff and puff, and is influenced by the non-uniformity of oil reservoirs and the like, so that the steam is easy to move along a hypertonic strip to cause low oil-gas ratio and even form steam channeling. Statistical data show that the throughput of the winning oil field is more than 6 cycles of nearly 30% of the oil field, the cycle oil-gas ratio is lower than 0.3, and the economic benefit is poor. In the present stage, the average recovery ratio of steam huff and puff is less than 20%, a large amount of residual oil is not extracted, auxiliary measures are required to be searched for to adjust the steam absorption section, steam wave is improved, the utilization degree of a reservoir is improved, and therefore the development effect is improved.
The plugging adjusting technology is one of main technologies for adjusting the steam suction profile, plugging the steam channeling channel and improving the multi-round huff and puff effect. The foam system can enter the deep part of the stratum due to good injectability, selectively blocks large and small, blocks water and oil, and has small engineering risk, so the foam system becomes the dominant process of thermal production control and blocking.
In the steam huff and puff process, the development characteristics of the temperature field show that the temperature of the near wellbore region is 300-150 ℃, the temperature of the deep part of the oil reservoir is gradually reduced to 80-150 ℃, and a huge temperature difference exists between the near wellbore region and the deep part of the oil reservoir. The throughput process experiences such a large temperature difference, and a wider temperature application range is provided for the foam plugging adjustment method. In addition to temperature, in the later period of heavy oil exploitation, the heterogeneity of the oil reservoir is more and more serious, the requirements on the plugging strength and migration strength of foam are also more and more high, the regeneration and stability of the foam in a porous medium also greatly influence the plugging validity period, and then the multi-round application effect is influenced.
The existing foaming agent for thickened oil thermal recovery channeling sealing in China cannot be suitable for a wide temperature range from the deep part of an oil reservoir to a near-wellbore zone due to the fact that the structural and performance stability is poor at high temperature. In addition, as the heavy oil reservoir enters the later stage of steam injection multiple huff and puff, formation heterogeneity is aggravated, the plugging strength of the traditional foaming agent is relatively weak, the wave and efficiency is reduced after the multiple huff and puff applications, the general first period in field implementation has obvious plugging adjusting effect, and when the second period and the third period are repeatedly implemented subsequently, obvious effect is not generated, and the steam channeling channel is plugged subsequently and is debilitated.
The invention mainly solves the problem of gas channeling in the gas displacement process, but the foam channeling blocking composition provided by the invention cannot resist the high temperature of 200-300 ℃ and cannot be applied to the multi-pass throughput heavy oil reservoir channeling blocking process.
Disclosure of Invention
The invention aims to: aiming at the defects of the prior art, the invention discloses a foaming agent composition for regulating and blocking in thickened oil thermal recovery, a preparation method and application thereof, which can be used for blocking a steam channeling channel and improving steam wave in the thickened oil thermal recovery process. The foaming agent composition can quickly form foam with small and uniform size at the temperature of 80-300 ℃ and has the foam resistance factor of 80-600; the foaming and foam stabilizing capability of the foaming agent basically does not change after the system is aged at high temperature of 80-300 ℃ for 10 days; the mineralization degree of the system is more than 50000mg/L, wherein the calcium and magnesium ions are more than 3000mg/L; when the method is applied to the thick oil thermal recovery process, the system can be injected in front and can be accompanied by steam.
The technical scheme is as follows: the foaming agent composition for thermal recovery plugging of the thickened oil comprises the following components in parts by weight:
0.2-10 parts of polyether anionic surfactant;
0.2 to 10 parts of polyether modified trisiloxane gemini surfactant;
0.1 to 5 parts of betaine type amphoteric surfactant;
75 to 99.5 portions of water.
Further, the polyether anionic surfactant is one of fatty alcohol polyoxyethylene ether sulfonate and fatty alcohol polyoxyethylene ether carboxylate.
Further, the fatty alcohol polyoxyethylene ether sulfonate has a structure shown in a formula (1):
wherein M is 1 Is at least one of alkali metal ion, alkaline earth metal ion or ammonium ion, preferably K + 、 Na + 、NH 4 + At least one of (a) and (b);
R 1 is a C8-C24 aliphatic or long chain aryl group, preferably a C12-C18 aliphatic or long chain aryl group;
R 2 is one of methyl, ethyl, propyl and isopropyl, preferably one of ethyl, propyl and isopropyl;
m is an integer of 3 to 20, preferably an integer of 3 to 10.
Further, the fatty alcohol-polyoxyethylene ether carboxylate has a structure shown in a formula (2):
wherein M is 2 Is at least one of alkali metal particles, alkaline earth metal ions and ammonium ions, preferably K + 、 Na + 、NH 4 + At least one of (a) and (b);
R 3 is a long-chain alkyl group of C8 to C24, preferably a long-chain alkyl group of C12 to C18;
R 4 alkyl of C1 to C5, preferably C2 to C3;
n is an integer of 3 to 20, preferably 3 to 10.
Further, the structure of the polyether modified trisiloxane gemini surfactant is shown as a formula (3):
wherein p is 0 or 1, preferably p=0;
q is an integer or fraction of 8 to 30, preferably q is an integer or fraction of 10 to 18, more preferably q is an integer or fraction of 12 to 16.
Further, the betaine type amphoteric surfactant is selected from one of cocamidopropyl betaine, alkyl sulfobetaine and alkyl hydroxysulfopropyl betaine.
Further, the structure of the alkyl betaine is shown as a formula (4):
wherein R is 5 Is a long-chain alkyl group of 12 to 24 carbon atoms, preferably a long-chain alkyl group of 12 to 18 carbon atoms.
Further, the structure of the alkyl sulfobetaine is shown as a formula (5):
wherein R is 6 Is a long-chain alkyl group of C12 to C24, preferably a long-chain alkyl group of C12 to C18;
R 7 is C2-C3 alkyl.
Still further, the alkyl hydroxysulfopropyl betaine has a structure as shown in formula (6):
wherein R is 8 Is a long-chain alkyl group of 12 to 24 carbon atoms, preferably a long-chain alkyl group of 12 to 18 carbon atoms.
The mol ratio of the polyether anionic surfactant to the polyether modified trisiloxane gemini surfactant is (0.5-20): 1, preferably (0.5-5): 1.
The mol ratio of the polyether anionic surfactant to the betaine type amphoteric surfactant is (0.2-10): 1, preferably (1 to 5): 1.
The preparation method of the foaming agent composition for thermal recovery plugging of the thickened oil comprises the following steps:
(1) Synthesis of polyether modified trisiloxane gemini surfactant
(11) Under the protection of nitrogen, dissolving polyethylene glycol in methylene dichloride, stirring for 0.5-3 h at 40-70 ℃ to obtain a mixed solution, then adding p-toluenesulfonic acid, dicarboxylic acid or maleic anhydride into the mixed solution, heating to 120-140 ℃ to react for 2-6 h to obtain a reaction solution, separating the reaction solution by using ethyl acetate, washing and drying to obtain an intermediate diacid polyethylene glycol ester; wherein the method comprises the steps of
The mass ratio of polyethylene glycol to dichloromethane is 1: (5-20);
(12) Under the protection of nitrogen, mixing the intermediate dibasic acid polyethylene glycol ester with a catalyst and isopropanol, activating for 10-60 min at 40-80 ℃, then heating to 90-120 ℃, continuously dripping 1,3, 5-heptamethyltrisiloxane, reacting for 2-24 h, removing the catalyst by using activated carbon adsorption, and removing byproducts by reduced pressure distillation to obtain the polyether modified trisiloxane gemini surfactant, wherein the mass ratio of 1,3, 5-heptamethyltrisiloxane to isopropanol is 1: (5-20);
(2) Preparation of foaming agent composition for thermal recovery plugging of thickened oil
And uniformly mixing the formula amount of polyether anionic surfactant, polyether modified trisiloxane gemini surfactant, betaine type amphoteric ion surfactant and water to obtain the foaming agent composition for thermal recovery and plugging of the thickened oil.
Further, the dicarboxylic acid in the step (11) is one of maleic acid and 2-hexene-1, 6-diacid; the polyethylene glycol in the step (11) has a number average molecular weight of 400-1500.
Further, the catalyst in the step (12) is one of chloroplatinic acid, platinum siloxane complex, carbonyl iron, palladium/alumina and palladium/calcium carbonate.
Further, the molar ratio of the dicarboxylic acid or maleic anhydride to the polyethylene glycol is (1.1 to 1.4): 2, preferably (1.2 to 1.3): 2.
Further, in the step (11), the mass ratio of the p-toluenesulfonic acid to the polyethylene glycol is (1.5-2): 100, preferably 1.8:100.
Further, the molar ratio of the intermediate dibasic acid polyethylene glycol ester to the 1,3, 5-heptamethyltrisiloxane is (1.1-1.4:1), preferably (1.2-1.3): 1.
Further, the mass ratio of the catalyst to the 1,3, 5-heptamethyltrisiloxane is (0.12-0.2): 100, preferably (0.15 to 0.18): 100.
Further, the dicarboxylic acid in the step (11) has a structure as shown in formula (7):
wherein p is 0 or 1.
Further, the structure of the intermediate dibasic acid polyethylene glycol ester is shown as a formula (8):
wherein p is 0 or 1, q is any integer or fraction of 8 to 30.
Further, the structure of the 1,3, 5-heptamethyltrisiloxane is shown as a formula (9):
the foaming agent composition is applied to the thermal recovery plugging process of heavy oil reservoirs.
The method comprises the following specific steps: at proper injection timing, the foaming agent composition and gas are injected into stratum from well bore to block high permeability channel and improve steam wave.
The injection timing is one of pre-injection or steam-associated injection.
The gas is nitrogen, air or CO 2 At least one of flue gas.
The reaction equation for preparing the polyether modified trisiloxane gemini surfactant is as follows:
the polyether anionic surfactant in the foaming agent composition for thermal recovery and plugging of the thickened oil has the advantages of good water solubility, strong surface activity, good hydrothermal stability, good compatibility and the like, and can be foamed in a porous medium rapidly;
the polyether modified trisiloxane gemini surfactant is a synthetic organic silicon gemini surfactant, can greatly reduce CMC of a foaming agent, simultaneously improves the separation pressure of a foam liquid film, and further increases the foam stability and the blocking strength, and is a foam stabilizer capable of resisting high temperature and high salt;
the betaine type amphoteric ion surfactant can increase the gas-liquid interface charge density, and has good foaming performance, foam stabilizing performance and compatibility. The synergistic effect of the three components ensures that the foam system rapidly foams and high-strength plugs at the temperature of 80-300 ℃ by regulating and controlling electrostatic attraction in an interface layer, electrostatic repulsion between layers and hydration, thereby greatly improving the foam performance and temperature resistance of the foam system and having better popularization prospect in heavy oil reservoirs with multiple huffs.
The beneficial effects are that: compared with the prior art, the invention has the following beneficial effects:
(1) The foaming agent composition has strong foaming capacity and high blocking strength, can form foam with small and uniform size at 80-300 ℃ and has a resistance factor of 80-600; the mineralization degree of the system is more than 50000mg/L, wherein the calcium and magnesium ions are 0-3000 mg/L;
(2) The foaming agent composition can resist the temperature of 80-300 ℃ and has basically no change in foaming and foam stabilizing capability after aging at high temperature for more than 10 days; the injection can be performed in front in the thermal recovery of the thick oil, and the injection can be performed along with steam;
(3) The foam composition has small adsorption loss in the reservoir and can be deeply transported.
Drawings
FIG. 1 is a graph of the drag factor at 80℃for a foaming agent composition G2 for thermal recovery plugging of heavy oil after 300℃aging.
Figure 2 is a dynamic profile of production of a single well F at a block of a victory oil field before and after use of a foaming agent composition for thermal recovery and plugging of heavy oil.
The specific embodiment is as follows:
the invention will be described in further detail below with reference to specific examples and with reference to the data. It should be understood that these examples are intended to illustrate the invention and are not intended to limit the scope of the invention in any way.
Example 1
The foaming agent composition G1 for thermal recovery plugging of the thickened oil comprises the following substances in parts by mass:
further, the fatty alcohol polyoxyethylene ether sulfonate has the following molecular formula:
wherein M is 1 Is sodium ion; r is R 1 Is a C12 fatty group; r is R 2 is-CH 2 CH 2 -, m is 15.5.
The molecular formula of the polyether modified trisiloxane gemini surfactant S1 is as follows:
wherein p=0; q is 9.5.
The preparation method of the foaming agent composition G1 for thermal recovery plugging of the thickened oil comprises the following steps:
(1) Synthesis of polyether modified trisiloxane gemini surfactant S1
(11) Under the protection of nitrogen, dissolving polyethylene glycol in methylene dichloride, stirring for 0.5h at 70 ℃ to obtain a mixed solution, then adding p-toluenesulfonic acid and maleic anhydride into the mixed solution respectively, heating to 120 ℃ to react for 6h to obtain a reaction solution, then separating the reaction solution by using ethyl acetate, washing and drying to obtain an intermediate diacid polyethylene glycol ester; wherein the method comprises the steps of
The mass ratio of polyethylene glycol to dichloromethane is 1:20, a step of;
(12) Mixing an intermediate dibasic acid polyethylene glycol ester with a catalyst and isopropanol under the protection of nitrogen, activating for 60min at 40 ℃, then heating to 120 ℃, continuously dropwise adding 1,3, 5-heptamethyltrisiloxane, reacting for 2h, removing the catalyst by adsorption of active carbon, and removing byproducts by reduced pressure distillation to obtain the polyether modified trisiloxane gemini surfactant S1, wherein
The mass ratio of the 1,3, 5-heptamethyltrisiloxane to the isopropanol is 1:10;
(2) Preparation of foaming agent composition G1 for thermal recovery plugging of thickened oil
Uniformly mixing the formula amount of fatty alcohol polyoxyethylene ether sulfonate, polyether modified trisiloxane gemini surfactant S1, cocamidopropyl betaine and water to obtain a foam composition G1.
Further, the polyethylene glycol in the step (11) has a number average molecular weight of 400.
Further, the catalyst in the step (12) is chloroplatinic acid.
Further, the molar ratio of maleic anhydride to polyethylene glycol is 1.2:2.
Further, in the step (11), the mass ratio of the p-toluenesulfonic acid to the polyethylene glycol is 1.5:100.
further, the molar ratio of the intermediate dibasic acid polyethylene glycol ester to the 1,3, 5-heptamethyltrisiloxane is 1.2:1.
Further, the mass ratio of the catalyst to the 1,3, 5-heptamethyltrisiloxane is 0.12: 100.
Further, the structure of the intermediate dibasic acid polyethylene glycol ester is shown as a formula (8):
wherein p is 0 and q is 10.
The structure of the 1,3, 5-heptamethyltrisiloxane is shown as a formula (9):
the foaming agent composition G1 is applied to the thermal recovery plugging process of the heavy oil reservoir.
Under the condition of pre-injection, injecting the foaming agent composition G1 and nitrogen for thermal recovery and plugging of the thickened oil into a stratum from a shaft, and plugging a hypertonic channel in the thermal recovery process to improve steam wave.
Example 2
The foaming agent composition G2 for thermal recovery plugging of the thickened oil comprises the following components in parts by mass:
further, the fatty alcohol-polyoxyethylene ether carboxylate has the following molecular formula:
wherein M is 2 Is potassium ion; r is R 3 Is a C8 long chain alkyl group; r is R 4 is-CH 2 CH 2 -, m is 10.
The molecular formula of the polyether modified trisiloxane gemini surfactant S2 is as follows:
wherein p=0; q is 17.
Further, the alkyl betaine has the following molecular formula:
wherein R5 is a C12 long chain alkyl group.
The preparation method of the foaming agent composition G2 for thermal recovery plugging of the thickened oil comprises the following steps:
(1) Synthesis of polyether modified trisiloxane gemini surfactant S2
(11) Under the protection of nitrogen, dissolving polyethylene glycol in methylene dichloride, stirring for 3 hours at 40 ℃ to obtain a mixed solution, then adding p-toluenesulfonic acid and maleic anhydride into the mixed solution respectively, heating to 140 ℃ to react for 2 hours to obtain a reaction solution, then separating the reaction solution by using ethyl acetate, washing and drying to obtain an intermediate dibasic acid polyethylene glycol ester; wherein the method comprises the steps of
The mass ratio of polyethylene glycol to dichloromethane is 1:10;
(12) Mixing an intermediate dibasic acid polyethylene glycol ester with a catalyst and isopropanol under the protection of nitrogen, activating for 30min at 60 ℃, then heating to 100 ℃, continuously dropwise adding 1,3, 5-heptamethyltrisiloxane, reacting for 12h, removing the catalyst by adsorption of active carbon, and removing byproducts by reduced pressure distillation to obtain the polyether modified trisiloxane gemini surfactant, wherein
The mass ratio of the 1,3, 5-heptamethyltrisiloxane to the isopropanol is 1:5, a step of;
(2) Preparation of foaming agent composition G2 for thermal recovery plugging of thickened oil
Uniformly mixing the formula amount of fatty alcohol polyoxyethylene ether carboxylate, polyether modified trisiloxane gemini surfactant S2, alkyl betaine and water to obtain the foaming agent composition G2 for thermal recovery and plugging of thick oil.
The molar ratio of the maleic acid to the polyethylene glycol is 1.1:2.
The mass ratio of the p-toluenesulfonic acid to the polyethylene glycol is 1.8:100.
the molar ratio of the intermediate dibasic acid polyethylene glycol ester to the 1,3, 5-heptamethyltrisiloxane is 1.4:1.
The mass ratio of the catalyst to the 1,3, 5-heptamethyltrisiloxane is 0.15:100.
the intermediate dibasic acid polyethylene glycol ester has the following molecular formula:
wherein p=0; q is 18.
Further, the catalyst in the step (12) is a platinum siloxane complex.
Further, the structure of the 1,3, 5-heptamethyltrisiloxane is shown as a formula (9):
the foaming agent composition G2 is applied to the thermal recovery plugging process of the heavy oil reservoir.
The method comprises the following specific steps: under the condition of steam accompanying injection, the foaming agent composition and air are injected into the stratum from the shaft, and a hypertonic channel is blocked in the thermal recovery process, so that the steam wave is improved.
Example 3
The foaming agent composition G3 for thermal recovery plugging of the thickened oil comprises the following components in percentage by mass:
further, the fatty alcohol polyoxyethylene ether sulfonate has the following molecular formula:
wherein M is 1 Is potassium ion; r is R 1 Is a C8 long chain aryl group; r is R 2 Is propyl; m is 5.
Further, the molecular formula of the polyether modified trisiloxane gemini surfactant S3 is as follows:
wherein p=1; q is 23.
Further, the alkyl sulfobetaine has the following molecular formula:
wherein R is 6 Is a C12 long chain alkyl group; r is R 7 Is ethyl.
The preparation method of the foaming agent composition G3 for thermal recovery plugging of the thickened oil comprises the following steps:
(1) Synthesis of polyether modified trisiloxane gemini surfactant S3
(11) Under the protection of nitrogen, dissolving polyethylene glycol in methylene dichloride, stirring for 2 hours at 60 ℃ to obtain a mixed solution, then adding p-toluenesulfonic acid and dicarboxylic acid into the mixed solution respectively, heating to 130 ℃ to react for 4 hours to obtain a reaction solution, then separating the reaction solution by using ethyl acetate, washing and drying to obtain an intermediate diacid polyethylene glycol ester; wherein the method comprises the steps of
The mass ratio of polyethylene glycol to dichloromethane is 1:5, a step of;
(12) Mixing an intermediate dibasic acid polyethylene glycol ester with a catalyst and isopropanol under the protection of nitrogen, activating for 10min at 80 ℃, then heating to 90 ℃, continuously dropwise adding 1,3, 5-heptamethyltrisiloxane, reacting for 24h, removing the catalyst by adsorption of active carbon, and removing byproducts by reduced pressure distillation to obtain the polyether modified trisiloxane gemini surfactant, wherein
The mass ratio of the 1,3, 5-heptamethyltrisiloxane to the isopropanol is 1:20, a step of;
(2) Preparation of foaming agent composition G3 for thermal recovery plugging of thickened oil
Uniformly mixing the formula amount of fatty alcohol polyoxyethylene ether sulfonate, polyether modified trisiloxane gemini surfactant S3, alkyl sulfobetaine and water to obtain a foaming agent composition G3.
Further, the dicarboxylic acid in the step (11) is 2-hexene-1, 6-diacid. In one embodiment the dicarboxylic acid in step (11) is maleic acid.
Further, the catalyst in step (12) is palladium/alumina.
Further, the molar ratio of dicarboxylic acid to polyethylene glycol is 1.4:2.
Further, the dicarboxylic acid in the step (11) has a structure as shown in formula (7):
wherein p is 0. In another embodiment, the dicarboxylic acid has the formula p is 1.
The mass ratio of the p-toluenesulfonic acid to the polyethylene glycol is 2:100.
the molar ratio of the intermediate dibasic acid polyethylene glycol ester to the 1,3, 5-heptamethyltrisiloxane is 1.1:1.
The mass ratio of the catalyst to the 1,3, 5-heptamethyltrisiloxane is 0.2:100.
the intermediate dibasic acid polyethylene glycol ester has the following molecular formula:
wherein p=1; q is 22.
The foaming agent composition G3 is applied to the thermal recovery plugging process of the heavy oil reservoir.
The method comprises the following specific steps: under the condition of steam accompanying injection, the foaming agent composition and flue gas are injected into the stratum from the shaft, and a hypertonic channel is blocked in the thermal recovery process, so that the steam wave is improved.
Performance evaluation of foaming agent compositions G1, G2 and G3 for thermal recovery and plugging of thickened oil
Test example 1
The experimental water is produced water of a certain block F of a victory oil field, the total mineralization degree is 23561mg/L, wherein Ca 2+ 2479Mg/L, mg 2+ The content is 201mg/L.
Foaming agent compositions G1, G2 and G3 for thermal recovery plugging of thickened oil and commercially available foaming agents RYM-1 and RYM-2 prepared in examples 1-3 are aged for 1 day at 300 ℃ at high temperature, and the foaming volume, the foam half-life and the resistance factor of 5 foaming agents after treatment at 80 ℃ and 200 ℃ are evaluated. The foaming volume, half-life of foam and resistance factor test method are referred to Q/SH 102012052-2010 conventional foaming agent for foam flooding, and the results are shown in Table 1.
TABLE 1 Performance test results of foam compositions G1, G2, G3 and commercial foam RYM-1 and RYM-2 for thermal recovery and plugging of heavy oil
Wherein the change curve of the resistance factor with the injection amount of the foaming agent composition G2 for thermal recovery plugging of the thickened oil under the condition of 80 ℃ after aging at 300 ℃ is shown in figure 1.
According to the evaluation result, the foaming agent compositions G1, G2 and G3 for thermal recovery and plugging of thickened oil provided by the invention have strong foaming and stability performance at 80 ℃ and 200 ℃ after aging, and have good high-temperature stability. Foaming volumes of the foaming agent compositions G1, G2 and G3 for thermal recovery and plugging of thickened oil are all larger than 276mL at the temperature of 80 ℃, the half-life of the foam is more than 360min, and foaming volumes of the commercial foaming agents RYM-1 and RYM-2 are less than 270mL, the half-life of the foam is less than 230min, which is obviously lower than that of the foaming agent composition; the resistance factors of the foam agent compositions G1, G2 and G3 of the invention are all more than 460, G2 is up to 550, and the resistance factors of the commercial foam agents RYM-1 and RYM-2 are 388 and 296 respectively, which are obviously lower than those of the invention; has similar change rule under the condition of 200 ℃. The foaming agent compositions G1, G2 and G3 of the invention all meet the related requirements of oil fields, and compared with the commercial foaming agent, the foaming agent composition has excellent comprehensive performance and can meet the development requirements of heavy oil reservoirs with multiple huffs.
Test example 2: in-situ application test
The experiment aims at a single well F of a certain block of a victory oil field, the oil reservoir temperature is 65 ℃, the crude oil viscosity is 13665mPa.s, the emulsified water content is 24.3%, the total mineralization degree of stratum water is 23561mg/L, wherein Ca 2+ 2479Mg/L, mg 2+ The content is 201mg/L. The reservoir is fine sandstone and siltstone, and the oil reservoir permeability is 2620md.
The foam plugging and steam huff-and-puff test is carried out on the foam agent composition G2 for thick oil thermal recovery plugging prepared in example 2 in 5 months in 2020 for improving development effect, wherein the daily liquid is 52.6t/d, the daily oil is 1.9t/d, the water content is 96.4%, the daily liquid is 35.9t/d, the daily oil is 13.7t/d, the water content is 61.8%, the daily liquid of a single well is 36.8t/d, the daily oil is 5.2t/d and the water content is 85.9% before the measures. The production dynamics are shown in FIG. 2.
Examples 4 to 10
Substantially the same as in example 1, the difference is only that: m in fatty alcohol polyoxyethylene ether sulfonate 1 、R 1 、 R 2 M is different:
examples 11 to 14
Substantially the same as in example 1, the difference is only that: the polyethylene glycol has different number average molecular weight and types of catalysts:
| number average molecular weight of polyethylene glycol | Catalyst species | |
| Example 11 | 500 | Platinum siloxane complexes and their use |
| Example 12 | 1200 | Carbonyl iron |
| Example 13 | 1000 | Palladium/alumina |
| Example 14 | 800 | Palladium/calcium carbonate |
Examples 15 to 18
Substantially the same as in example 1, the difference is only that: the molar ratio of maleic anhydride to polyethylene glycol and the mass ratio of p-toluenesulfonic acid to polyethylene glycol are different:
examples 19 to 22
Substantially the same as in example 1, the difference is only that: molar ratio of intermediate dibasic acid polyethylene glycol ester to 1,3, 5-heptamethyltrisiloxane the mass ratio of the catalyst to the 1,3, 5-heptamethyltrisiloxane is different:
examples 23 to 26
Substantially the same as in example 2, the difference is only that: m in fatty alcohol polyoxyethylene ether carboxylate formula 2 、R 3 、；R 4 M is different;
| M 2 | R 3 | R 4 | m | |
| example 23 | K + | C24 long chain alkyl | -CH 2 CH 2 CH 2 - | 3 |
| Example 24 | Na + | C12 long chain alkyl | -CH 2 CH 2 CH 2 CH 2 - | 20 |
| Example 25 | Na + | C18 long chain alkyl | -CH 2 - | 12 |
| Example 26 | NH 4 + | C16 long chain alkyl | -CH 2 CH 2 CH 2 CH 2 CH 2 - | 8 |
Examples 27 to 29
Substantially the same as in example 2, the difference is only that: r in alkyl betaines 5 Different;
| R 5 | |
| example 27 | C18 long chain alkyl |
| Example 28 | C24 long chain alkyl |
| Example 29 | C14 long chain alkyl |
Examples 30 to 33
Substantially the same as in example 3, the difference is only that: r in the formula of alkyl sulfobetaines 6 And R is R 7 Different:
| R 6 | R 7 | |
| example 30 | C24 long chain alkyl | Ethyl group |
| Example 31 | C18 long chain alkyl | N-propyl radical |
| Example 32 | C14 long chain alkyl | Isopropyl group |
| Example 33 | C16 long chain alkyl | N-propyl radical |
Examples 34 to 37
Substantially the same as in example 3, the difference is only that: the alkyl sulfobetaine is replaced by alkyl hydroxy sulfopropyl betaine, and the structure of the alkyl hydroxy sulfopropyl betaine is shown as the following formula:
wherein the substituent R in the structure of the alkyl hydroxy sulfopropyl betaine in the examples 8 The situation is as follows:
| R 8 | |
| example 34 | C14 long chain alkyl |
| Example 35 | C18 long chain alkyl |
| Example 36 | C24 long chain alkyl |
| Example 37 | C12 long chain alkyl |
Examples 38 to 40
Substantially the same as in example 3, the difference is only that: the molar ratio of dicarboxylic acid to polyethylene glycol is different:
| molar ratio of dicarboxylic acid to polyethylene glycol | |
| Example 38 | 1.1:2 |
| Example 39 | 1.2:2 |
| Example 40 | 1.6:2 |
The embodiments of the present invention have been described in detail. However, the present invention is not limited to the above-described embodiments, and various modifications may be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Claims (23)
1. The foaming agent composition for thermal recovery plugging of the thickened oil is characterized by comprising the following components in parts by weight:
0.2-10 parts of polyether anionic surfactant;
0.2 to 10 parts of polyether modified trisiloxane gemini surfactant;
0.1 to 5 parts of betaine type amphoteric surfactant;
75-99.5 parts of water, wherein:
the polyether anionic surfactant is one of fatty alcohol polyoxyethylene ether sulfonate and fatty alcohol polyoxyethylene ether carboxylate;
the fatty alcohol polyoxyethylene ether sulfonate has a structure shown in a formula (1):
wherein M is 1 Is at least one of alkali metal ion, alkaline earth metal ion or ammonium ion;
R 1 is aliphatic or long-chain aryl of C8-C24;
R 2 is one of methyl, ethyl, propyl and isopropyl;
m is any integer from 3 to 20;
the fatty alcohol-polyoxyethylene ether carboxylate has a structure shown in a formula (2):
wherein M is 2 Is at least one of alkali metal particles, alkaline earth metal ions and ammonium ions;
R 3 is C8-C24, a long chain alkyl group;
R 4 is C1-C5 alkyl;
n is any integer from 3 to 20;
the structure of the polyether modified trisiloxane gemini surfactant is shown as a formula (3):
wherein p is 0 or 1;
q is any integer or decimal from 8 to 30;
the betaine type amphoteric surfactant is selected from one of cocamidopropyl betaine, alkyl sulfobetaine and alkyl hydroxysulfopropyl betaine;
the structure of the alkyl betaine is shown as a formula (4):
wherein R is 5 Is long-chain alkyl of C12-C24;
the structure of the alkyl sulfobetaine is shown as a formula (5):
wherein R is 6 Is long-chain alkyl of C12-C24;
R 7 is C2-C3 alkyl;
the alkyl hydroxy sulfopropyl betaine has a structure shown in a formula (6):
wherein R is 8 Is a long-chain alkyl group of C12-C24.
2. The foaming agent composition for thermal recovery plugging of thickened oil according to claim 1, wherein the fatty alcohol polyoxyethylene ether sulfonate has a structure shown in a formula (1):
wherein M is 1 For K + 、Na + 、NH 4 + At least one of (a) and (b);
R 1 is C12-C18 aliphatic or long-chain aryl;
R 2 is one of ethyl, propyl and isopropyl;
m is any integer from 3 to 10.
3. The foaming agent composition for thermal recovery plugging of thickened oil according to claim 1, wherein the fatty alcohol-polyoxyethylene ether carboxylate has a structure shown in a formula (2):
wherein M is 2 For K + 、Na + 、NH 4 + At least one of (a) and (b);
R 3 is long-chain alkyl of C12-C18;
R 4 is C2-C3 alkyl;
n is any integer from 3 to 10.
4. The foaming agent composition for thermal recovery plugging of thickened oil according to claim 1, wherein the polyether modified trisiloxane gemini surfactant has a structure as shown in formula (3):
wherein p is 0;
q is an integer or fraction of 10 to 18.
5. The foaming agent composition for thermal recovery plugging of thickened oil according to claim 1, wherein the polyether modified trisiloxane gemini surfactant has a structure as shown in formula (3):
wherein p is 0;
q is any integer or decimal from 12 to 16.
6. The foaming agent composition for thermal recovery plugging of thickened oil according to claim 1, wherein the alkyl betaine has a structure as shown in formula (4):
wherein R is 5 Is a long-chain alkyl group of C12-C18.
7. The foam composition for thermal recovery plugging of thickened oil according to claim 1, wherein the alkyl sulfobetaine has a structure as shown in formula (5):
wherein R is 6 Is long-chain alkyl of C12-C18;
R 7 is C2-C3 alkyl.
8. The foam composition for thermal recovery plugging of thickened oil according to claim 1, wherein the alkyl hydroxypropyl sulfobetaine has a structure as shown in formula (6):
wherein R is 8 Is a long-chain alkyl group of C12-C18.
9. The foam composition for thermal recovery plugging of thickened oil according to claim 1, wherein the molar ratio of the polyether anionic surfactant to the polyether modified trisiloxane gemini surfactant is (0.5-20): 1.
10. The foam composition for thermal recovery plugging of thickened oil according to claim 9, wherein the molar ratio of the polyether anionic surfactant to the polyether modified trisiloxane-based gemini surfactant is (0.5-5): 1.
11. The foam composition for thermal recovery plugging of thickened oil according to claim 1, wherein the molar ratio of the polyether anionic surfactant to the betaine type amphoteric surfactant is (0.2-10): 1.
12. the foam composition for thermal recovery plugging of thickened oil according to claim 11, wherein the molar ratio of said polyether anionic surfactant to betaine type amphoteric surfactant is (1-5): 1.
13. The method for preparing the foaming agent composition for thermal recovery plugging of thickened oil according to any one of claims 1 to 12, which is characterized by comprising the following steps:
(1) Synthesis of polyether modified trisiloxane gemini surfactant
(11) Under the protection of nitrogen, dissolving polyethylene glycol in methylene dichloride, stirring for 0.5-3 h at 40-70 ℃ to obtain a mixed solution, then adding p-toluenesulfonic acid, dicarboxylic acid or maleic anhydride into the mixed solution, heating to 120-140 ℃ to react for 2-6 h to obtain a reaction solution, separating the reaction solution by using ethyl acetate, washing and drying to obtain an intermediate diacid polyethylene glycol ester; wherein the method comprises the steps of
The mass ratio of polyethylene glycol to dichloromethane is 1: (5-20);
(12) Mixing an intermediate dibasic acid polyethylene glycol ester with a catalyst and isopropanol under the protection of nitrogen, activating for 10-60 min at 40-80 ℃, then heating to 90-120 ℃, continuously dropwise adding 1,3, 5-heptamethyltrisiloxane, reacting for 2-24 h, removing the catalyst by adsorption of activated carbon, and removing byproducts by reduced pressure distillation to obtain the polyether modified trisiloxane gemini surfactant, wherein the catalyst is prepared by the steps of
The mass ratio of the 1,3, 5-heptamethyltrisiloxane to the isopropanol is 1: (5-20);
(2) Preparation of foaming agent composition for thermal recovery plugging of thickened oil
And uniformly mixing the formula amount of polyether anionic surfactant, polyether modified trisiloxane gemini surfactant, betaine type amphoteric ion surfactant and water to obtain the foaming agent composition for thermal recovery and plugging of the thickened oil.
14. The method for preparing a foaming agent composition for thermal recovery and plugging of thickened oil according to claim 13, wherein the dicarboxylic acid in the step (11) is one of maleic acid and 2-hexene-1, 6-diacid; the polyethylene glycol in the step (11) has a number average molecular weight of 400-1500.
15. The method for preparing a foam composition for thermal recovery plugging of thickened oil according to claim 13, wherein the catalyst in step (12) is one of chloroplatinic acid, platinum siloxane complex, carbonyl iron, palladium/alumina, palladium/calcium carbonate.
16. The method for preparing the foam composition for thermal recovery plugging of thickened oil according to claim 13, wherein the molar ratio of dicarboxylic acid or maleic anhydride to polyethylene glycol is (1.1-1.4): 2;
in the step (11), the mass ratio of the p-toluenesulfonic acid to the polyethylene glycol is (1.5-2): 100.
17. the method for preparing the foam composition for thermal recovery plugging of thickened oil according to claim 13, wherein the molar ratio of dicarboxylic acid or maleic anhydride to polyethylene glycol is (1.2-1.3): 2;
the mass ratio of the p-toluenesulfonic acid to the polyethylene glycol in the step (11) is 1.8:100.
18. The method for preparing the foam composition for thermal recovery plugging of thickened oil according to claim 13, wherein the molar ratio of the intermediate dibasic acid polyethylene glycol ester to the 1,3, 5-heptamethyltrisiloxane is (1.1-1.4): 1;
the mass ratio of the catalyst to the 1,3, 5-heptamethyltrisiloxane is (0.12-0.2): 100.
19. the method for preparing the foam composition for thermal recovery plugging of thickened oil according to claim 13, wherein the molar ratio of the intermediate dibasic acid polyethylene glycol ester to the 1,3, 5-heptamethyltrisiloxane is (1.2-1.3): 1;
the mass ratio of the catalyst to the 1,3, 5-heptamethyltrisiloxane is (0.15-0.18): 100.
20. The method for preparing a foaming agent composition for thermal recovery and plugging of thickened oil according to claim 13, wherein the dicarboxylic acid in the step (11) has a structure as shown in formula (7):
wherein p is 0 or 1.
21. The method for preparing the foaming agent composition for thermal recovery plugging of thickened oil according to claim 13, wherein the structure of the intermediate dibasic acid polyethylene glycol ester is shown in the formula (8):
wherein p is 0 or 1, q is any integer or fraction of 8 to 30.
22. The method for preparing a foam composition for thermal recovery plugging of thickened oil according to claim 13, wherein the structure of 1,3, 5-heptamethyltrisiloxane is as shown in formula (9):
23. use of the foam composition of any one of claims 1-12 in a thermal recovery plugging process of a heavy oil reservoir.
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