CN115109575A - Low permeability reservoir CO 2 Nano-foam oil washing agent for flooding and preparation method and application thereof - Google Patents
Low permeability reservoir CO 2 Nano-foam oil washing agent for flooding and preparation method and application thereof Download PDFInfo
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- 238000005406 washing Methods 0.000 title claims abstract description 76
- 230000035699 permeability Effects 0.000 title claims abstract description 48
- 239000008208 nanofoam Substances 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 60
- 239000006260 foam Substances 0.000 claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000004094 surface-active agent Substances 0.000 claims abstract description 38
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000002736 nonionic surfactant Substances 0.000 claims abstract description 10
- 239000003945 anionic surfactant Substances 0.000 claims abstract description 8
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910001424 calcium ion Inorganic materials 0.000 claims abstract description 7
- 229910001425 magnesium ion Inorganic materials 0.000 claims abstract description 7
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000011575 calcium Substances 0.000 claims abstract description 6
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 6
- 230000033558 biomineral tissue development Effects 0.000 claims abstract description 4
- 239000003921 oil Substances 0.000 claims description 98
- 235000019198 oils Nutrition 0.000 claims description 97
- 238000003756 stirring Methods 0.000 claims description 51
- 239000011734 sodium Substances 0.000 claims description 27
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical group C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 25
- 229910052708 sodium Inorganic materials 0.000 claims description 25
- -1 methyl taurate Chemical compound 0.000 claims description 24
- 229940104261 taurate Drugs 0.000 claims description 24
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 23
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 17
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 239000007787 solid Substances 0.000 claims description 16
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 10
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 8
- 238000005187 foaming Methods 0.000 claims description 7
- 238000005516 engineering process Methods 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 235000019864 coconut oil Nutrition 0.000 claims description 2
- 239000003240 coconut oil Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 239000008346 aqueous phase Substances 0.000 claims 1
- 239000003599 detergent Substances 0.000 claims 1
- 230000005465 channeling Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 230000002195 synergetic effect Effects 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 28
- 230000000052 comparative effect Effects 0.000 description 20
- 238000012360 testing method Methods 0.000 description 17
- 239000000203 mixture Substances 0.000 description 14
- 238000002844 melting Methods 0.000 description 13
- 230000008018 melting Effects 0.000 description 13
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 10
- 239000010779 crude oil Substances 0.000 description 9
- 238000009472 formulation Methods 0.000 description 9
- 239000007789 gas Substances 0.000 description 9
- 238000006073 displacement reaction Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 239000012488 sample solution Substances 0.000 description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 239000012085 test solution Substances 0.000 description 4
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000003027 oil sand Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 2
- 239000011149 active material Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000009671 shengli Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000015784 hyperosmotic salinity response Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- KKDONKAYVYTWGY-UHFFFAOYSA-M sodium;2-(methylamino)ethanesulfonate Chemical compound [Na+].CNCCS([O-])(=O)=O KKDONKAYVYTWGY-UHFFFAOYSA-M 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 239000002888 zwitterionic surfactant Substances 0.000 description 1
Classifications
-
- 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
- C09K8/594—Compositions used in combination with injected gas, e.g. CO2 orcarbonated gas
-
- 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 DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/164—Injecting CO2 or carbonated water
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/70—Combining sequestration of CO2 and exploitation of hydrocarbons by injecting CO2 or carbonated water in oil wells
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Detergent Compositions (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
Abstract
The invention provides a low permeability reservoir CO 2 A nano-foam oil washing agent for flooding and a preparation method and application thereof belong to the field of oilfield chemistry. The invention provides low-permeability reservoir synergistic CO 2 The nano foam oil washing agent for the flooding comprises, by mass, 20% -25% of a nano surfactant, 12% -22% of an anionic surfactant, 15% -20% of a nonionic surfactant, 5% of a low-carbon alcohol and the balance of water. The foam oil washing agent provided by the invention can be effectively applied to the stratum water mineralization degree which is less than or equal to 100000mg/L, wherein the concentration of calcium and magnesium ions is less than or equal to 2000mg/L, and the permeability is (0.1-50) multiplied by 10 ‑3 μm 2 In low permeability reservoirs, CO enhancement 2 The effect of flooding can effectively solve CO 2 Gas channeling and poor oil washing rate to heavy components, and the methodThe foam oil washing agent has the advantages of simple preparation process, low cost and environmental protection.
Description
Technical Field
The invention belongs to the field of oilfield chemistry, and particularly relates to low-permeability reservoir CO 2 A nano-foam oil washing agent for flooding and a preparation method and application thereof.
Background
In recent years, with the continuous deepening of oil and gas exploration, the proportion of low-permeability oil reservoirs in China is gradually increased, which accounts for 2/3 with proven reserves in China, and a gas injection oil displacement technology is emphasized to solve the problems of high development difficulty, low exploitation efficiency and the like of the low-permeability oil reservoirs. According to the data of China oil exploration and development institute, about 130 hundred million tons of crude oil geological reserves are suitable for carbon dioxide oil displacement in China, the recovery ratio can be improved by 15 percent, the recoverable reserve can be increased by 19.2 hundred million tons, and about 47 hundred million-55 million tons of carbon dioxide are sealed and stored; if the whole oil reservoir potential is considered, the carbon dioxide sealing amount can reach more than 150 hundred million tons. But because of the technical shortage and the weak construction strength of market systems, the large-scale application and carbon reduction potential of the CCUS technology are far from being fully exerted.
CO 2 Is a low density, non-viscous, high mobility fluid with a much lower viscosity than the formation water and the formation crude oil, and therefore in CO 2 In the oil displacement process, unfavorable fluidity ratio leads to viscous fingering and reduced swept volume; meanwhile, due to the existence of heterogeneity, cracks and the like of the stratum, gas channeling occurs, and therefore the oil displacement efficiency is reduced. Swept volume can be increased by adding a foaming agent to displace gas as a foamed fluid, which reduces the flow velocity in the high permeable layer due to an increase in the apparent viscosity of the foamed fluid. But conventional nitrogen foamers with CO 2 The compatibility is poor and the foam half-life is only a few minutes. At the same time, at present, CO 2 In the experimental process of improving the recovery ratio by flooding, CO is found 2 The extraction capacity of light hydrocarbon components in the residual crude oil is stronger, and the oil washing efficiency of heavy components deposited on rocks is relatively poorer.
To solve CO 2 The problems of poor gas channeling and oil washing rate are solved urgently 2 The foam oil washing agent for flooding can pass through CO 2 The foam is injected to prevent gas channeling, and has certain oil washing capacity to achieve the purpose of one agent and double effects. Patent CN 113801282 a discloses an oil washing agent for carbon dioxide displacement and a preparation method and application thereof, but the synthesis process is complex, most of raw materials belong to highly toxic dangerous goods, and the oil washing agent is not suitable for popularization and application and has no anti-channeling function.
Disclosure of Invention
The invention provides a low permeability reservoir CO 2 The nano foam oil-washing agent for flooding can be effectively applied to stratum water with the salinity of less than or equal to 100000mg/L, the concentration of calcium ions and magnesium ions of less than or equal to 2000mg/L and the permeability of (0.1-50) multiplied by 10 -3 μm 2 In low permeability reservoirs, CO enhancement 2 The effect of flooding can effectively solve CO 2 The problems of gas channeling and poor oil washing rate of heavy components are solved, and the foam oil washing agent has the advantages of simple preparation process, low cost and environmental protection.
In order to achieve the aim, the invention provides synergistic CO for a low-permeability reservoir 2 The nano foam oil washing agent for the flooding comprises, by mass, 20% -25% of a nano surfactant, 12% -22% of an anionic surfactant, 15% -20% of a nonionic surfactant, 5% of a low-carbon alcohol and the balance of water.
Preferably, the nano surfactant is a nano surfactant with the code number WX302S, which is commercially available from Ningbo-nano technology Limited company, and the particle size is less than or equal to 200 nm. The nano surfactant has the characteristics of good injectability, strong foaming capacity, high oil washing rate, temperature resistance and salt resistance.
Preferably, the anionic surfactant is sodium cocoyl methyl taurate, which has the general formula:
RCON(CH 3 )CH 2 CH 2 SO 3 Na
wherein R represents coconut oil acid.
In the above scheme, sodium cocoyl methyl taurate is a novel amino acid type surfactant. Is prepared by condensing natural fatty acid and sodium methyl taurate, and has the characteristics of abundant, fine and stable foam and the like under the condition of wide pH value.
Preferably, the nonionic surfactant is isomeric fatty lauryl polyoxyethylene ether, which is commercially available from Jiangsu Heian petrochemical plant and has a general formula:
RO(CH 2 CH 2 O) n H
wherein R ═ C 10 H 21 And n is any value selected from 5, 6, 7, 8, 9 and 10.
Preferably, the lower alcohol is at least one selected from ethanol and isopropanol.
The invention provides a low permeability reservoir CO according to any one of the technical schemes 2 The preparation method of the nano foam oil washing agent for the flooding comprises the following steps:
preheating anionic surfactant to above 40 deg.C in advance to melt it from solid state to liquid state, adding into reaction kettle, adding low carbon alcohol, stirring at 40-50 deg.C, adding water, stirring for 20-40min, adding nonionic surfactant and nanometer surfactant, stirring completely to obtain low permeability oil reservoir CO 2 The nanometer foam oil washing agent is used for driving.
The invention provides a low permeability reservoir CO according to any one of the technical schemes 2 The nano foam oil-washing agent for flooding has the permeability of (0.1-50) x 10 at the temperature of the stratum being less than or equal to 150 DEG C -3 μm 2 Low permeability reservoir CO with stratum water salinity less than or equal to 100000mg/L and calcium and magnesium ion concentration less than or equal to 2000mg/L 2 Application in driving.
Preferably, the low permeability reservoir CO 2 The using concentration of the nano foam oil washing agent for flooding is 0.5 wt%.
Preferably, when the water phase with the mineralization degree less than or equal to 100000mg/L and the calcium and magnesium ion concentration less than or equal to 2000mg/L is compatible, the interfacial tension is less than or equal to 3.6 multiplied by 10 -3 mN/m, the foaming volume is more than or equal to 215mL, the foam half-life period is more than or equal to 75min, and the oil washing rate is more than or equal to 92.0%.
Compared with the prior art, the invention has the advantages and positive effects that:
1. the invention provides low-permeability reservoir CO 2 The nanometer foam oil washing agent for oil displacement is compounded with nanometer active material and surfactant. The nano active material can change the wettability of the rock surface, and plays a role in wetting reversal, so that the oil washing rate is improved. After the nonionic surfactant, the zwitterionic surfactant and the nano surfactant are compounded, the stability of the foam is enhancedThe half-life period is prolonged, the oil-water interfacial tension is further reduced, the number of capillary tubes is increased, and the purpose of improving the recovery ratio is achieved.
2. The invention provides low permeability reservoir CO 2 A nano-foam oil-washing agent for flooding, and CO 2 Has good compatibility with CO 2 The synergistic effect simultaneously plays two roles of channeling sealing and oil washing, has double effects, and greatly improves CO 2 Oil displacement efficiency.
3. The invention provides low-permeability reservoir CO 2 The nanometer foam oil washing agent for flooding has the characteristics of temperature resistance and salt tolerance, has good compatibility with oil water in an application site, does not generate precipitate, and does not cause stratum blockage.
4. The invention provides low-permeability reservoir CO 2 The nano foam oil washing agent for flooding has the advantages of simple production process, easily purchased raw materials, no organic chlorine, no harm to the environment and personnel from production to use and accordance with the requirements of environmental protection.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The raw materials in the examples of the present application were purchased commercially, the nano surfactant WX302S was purchased from nibofeng cheng nanotechnology co.
Example 1
Preheating 220kg of sodium cocoyl methyl taurate to more than 40 ℃ (melting from solid state to liquid state), adding into a reaction kettle, adding 50kg of ethanol, stirring uniformly at 40-50 ℃, adding 380kg of water, stirring for 30min, finally adding 150kg of isomeric fatty dodecyl alcohol polyoxyethylene ether (n-5) and 200kg of nano surfactant WX302S, and fully stirring uniformly to obtain low permeability oil reservoir CO 2 The nanometer foam oil washing agent is used for driving.
Example 2
Preheating 200kg of sodium cocoyl methyl taurate to more than 40 ℃ (melting from solid state to liquid state), adding into a reaction kettle, adding 50kg of isopropanol, stirring uniformly at 40-50 ℃, adding 380kg of water, stirring for 25min, finally adding 160kg of isomeric fatty dodecyl alcohol polyoxyethylene ether (n is 6) and 210kg of nano surfactant WX302S, and fully stirring uniformly to obtain low permeability reservoir CO 2 The nanometer foam oil washing agent is used for driving.
Example 3
Preheating 180kg of sodium cocoyl methyl taurate to more than 40 ℃ (melting from solid state to liquid state), adding into a reaction kettle, adding 50kg of ethanol, stirring uniformly at 40-50 ℃, adding 380kg of water, stirring for 30min, finally adding 170kg of isomeric fatty dodecyl alcohol polyoxyethylene ether (n-7) and 220kg of nano surfactant WX302S, and fully stirring uniformly to obtain low permeability oil reservoir CO 2 The nanometer foam oil washing agent is used for driving.
Example 4
Preheating 160kg of sodium cocoyl methyl taurate to more than 40 ℃ (melting from solid state to liquid state), adding into a reaction kettle, adding 50kg of isopropanol, stirring uniformly at 40-50 ℃, adding 380kg of water, stirring for 35min, adding 180kg of isomeric fatty dodecyl alcohol polyoxyethylene ether (n is 8) and 230kg of nano surfactant WX302S, and fully stirring uniformly to obtain low permeability reservoir CO 2 The nanometer foam oil washing agent is used for driving.
Example 5
Preheating 140kg of sodium cocoyl methyl taurate to more than 40 ℃ (melting from solid state to liquid state), adding into a reaction kettle, adding 50kg of ethanol, stirring uniformly at 40-50 ℃, adding 380kg of water, stirring for 40min, finally adding 190kg of isomeric fatty dodecyl alcohol polyoxyethylene ether (n ═ 9) and 240kg of nano surfactant WX302S, and stirring uniformly to obtain low permeability reservoir CO 2 The nanometer foam oil washing agent is used for driving.
Example 6
Preheating 120kg of sodium cocoyl methyl taurate to more than 40 ℃ (melting from solid state to liquid state), adding into a reaction kettle, adding 50kg of isopropanol, stirring uniformly at 40-50 ℃, adding 380kg of water, stirring for 20min, finally adding 200kg of isomeric fatty dodecyl alcohol polyoxyethylene ether (n is 10) and 250kg of nano surfactant WX302S, and fully stirring uniformly to obtain low permeability reservoir CO 2 The nanometer foam oil washing agent is used for driving.
The invention provides low permeability reservoir CO 2 The components and the proportion of the nano-foam oil washing agent for flooding are determined on the basis of a large number of experiments, and any change can cause unqualified detection indexes.
Comparative example 1
Adding 600kg of water into a reaction kettle, sequentially adding 50kg of ethanol, 150kg of isomeric fatty dodecyl alcohol polyoxyethylene ether (n is 5) and 200kg of nano surfactant WX302S, and uniformly stirring at the temperature of 40-50 ℃ to obtain low-permeability reservoir CO 2 The nanometer foam oil washing agent is used for driving.
Comparative example 1 low permeability reservoir CO obtained by removing the sodium cocoyl methyl taurate from the formulation of example 1 2 The nanometer foam oil washing agent for flooding, wherein the amount of the sodium cocoyl methyl taurate is supplemented with water.
Comparative example 2
Preheating 220kg of sodium cocoyl methyl taurate to above 40 ℃ (melting from solid state to liquid state), adding into a reaction kettle, adding 50kg of ethanol, stirring at 40-50 ℃, adding 530kg of water, stirring for 30min, adding 200kg of nano surfactant WX302S, and stirring to obtain low permeability oil reservoir CO 2 The nanometer foam oil washing agent is used for driving.
Comparative example 2 low permeability reservoir CO obtained by removing the isomeric fatty dodecyl alcohol polyoxyethylene ether from the formulation of example 1 2 The nanometer foam oil washing agent for flooding comprises water.
Comparative example 3
220kg of sodium cocoyl methyl taurate is preheated to above 40 ℃ in advance (melted from solid to liquid) and then added to the reactionAdding 50kg of ethanol into the reactor, stirring uniformly at the temperature of 40-50 ℃, adding 580kg of water, stirring for 30min, finally adding 150kg of isomeric fatty dodecyl alcohol polyoxyethylene ether (n is 5), and stirring uniformly to obtain the low-permeability reservoir CO 2 The nanometer foam oil washing agent is used for driving.
Comparative example 3 low permeability reservoir CO obtained by removing the nano-surfactant WX302S from the formulation of example 1 2 The nanometer foam oil washing agent for the flooding, wherein the amount of the nanometer surfactant WX302S is supplemented with water.
Comparative example 4
Preheating 110kg of sodium cocoyl methyl taurate to more than 40 ℃ (melting from solid state to liquid state), adding into a reaction kettle, adding 50kg of ethanol, stirring uniformly at 40-50 ℃, adding 490kg of water, stirring for 30min, finally adding 150kg of isomeric fatty dodecyl alcohol polyoxyethylene ether (n ═ 5) and 200kg of nano surfactant WX302S, and stirring uniformly to obtain low permeability reservoir CO 2 A nano foam oil washing agent for flooding.
Comparative example 4 the sodium cocoyl methyl taurate in the formulation of example 1 was deviated from the range of 12% to 22%, i.e. 110kg of sodium cocoyl methyl taurate (11%) was added to obtain a low permeability reservoir CO 2 The nano foam oil washing agent is used for flooding, and the small amount of sodium cocoyl methyl taurate is supplemented with water.
Comparative example 5
Preheating 230kg of sodium cocoyl methyl taurate to more than 40 ℃ (melting from solid state to liquid state), adding into a reaction kettle, adding 50kg of ethanol, stirring uniformly at the temperature of 40-50 ℃, adding 370kg of water, stirring for 30min, finally adding 150kg of isomeric fatty dodecyl alcohol polyoxyethylene ether (n is 5) and 200kg of nano surfactant WX302S, and fully stirring uniformly to obtain low permeability oil reservoir CO 2 A nano foam oil washing agent for flooding.
Comparative example 5 sodium cocoyl methyl taurate in the formulation of example 1 deviated from the range of 12% -22%, i.e., low permeability reservoir CO with 230kg sodium cocoyl methyl taurate (23%) added 2 Nanometer foam oil washing agent for flooding, and added cocoyl methyl tauroThe amount of sodium acid is removed from the amount of water.
Comparative example 6
Preheating 220kg of sodium cocoyl methyl taurate to more than 40 ℃ (melting from solid state to liquid state), adding into a reaction kettle, adding 50kg of ethanol, stirring uniformly at 40-50 ℃, adding 390kg of water, stirring for 30min, finally adding 140kg of isomeric fatty dodecyl alcohol polyoxyethylene ether (n-5) and 200kg of nano surfactant WX302S, and fully stirring uniformly to obtain low permeability oil reservoir CO 2 The nanometer foam oil washing agent is used for driving.
Comparative example 6 is a low permeability reservoir CO obtained by adding 140kg of iso-fatty lauryl polyoxyethylene ether (14%) in the formulation of example 1, wherein the iso-fatty lauryl polyoxyethylene ether is out of the range of 15% -20% 2 The nanometer foam oil washing agent is used for flooding, and the amount of the isomeric fatty dodecyl polyoxyethylene ether which is less added is supplemented by water.
Comparative example 7
Preheating 220kg of sodium cocoyl methyl taurate to above 40 ℃ (melting from solid state to liquid state), adding into a reaction kettle, adding 50kg of ethanol, stirring uniformly at 40-50 ℃, adding 320kg of water, stirring for 30min, adding 210kg of isomeric fatty decaol polyoxyethylene ether (n is 5) and 200kg of nano surfactant WX302S, and stirring uniformly to obtain low permeability oil reservoir CO 2 The nanometer foam oil washing agent is used for driving.
Comparative example 7 is a low permeability reservoir CO obtained by adding 210kg of iso-fatty lauryl polyoxyethylene ether (21%) in the formulation of example 1, wherein the iso-fatty lauryl polyoxyethylene ether is deviated from the range of 15% -20% 2 The nano-foam oil washing agent for flooding is removed from the amount of water by the amount of the added isomeric fatty dodecyl polyoxyethylene ether.
Comparative example 8
Preheating 220kg of sodium cocoyl methyl taurate to more than 40 ℃ (melting from solid state to liquid state), adding into a reaction kettle, adding 50kg of ethanol, stirring uniformly at 40-50 ℃, adding 390kg of water, stirring for 30min, finally adding 150kg of isomeric fatty dodecyl alcohol polyoxyethylene ether (n is 5) and 190kg of nano surfactant WX302S,fully stirring the mixture evenly to obtain low-permeability reservoir CO 2 The nanometer foam oil washing agent is used for driving.
Comparative example 8 shows that the nano-surfactant WX302S in the formulation of example 1 deviates from the range of 20% -25%, i.e., 190kg of nano-surfactant WX302S (19%) is added to obtain low permeability reservoir CO 2 The nanometer foam oil washing agent is used for driving, and the small amount of the nanometer surfactant WX302S is supplemented with water.
Comparative example 9
Preheating 220kg of sodium cocoyl methyl taurate to more than 40 ℃ (melting from solid state to liquid state), adding into a reaction kettle, adding 50kg of ethanol, stirring uniformly at 40-50 ℃, adding 320kg of water, stirring for 30min, finally adding 150kg of isomeric fatty dodecyl alcohol polyoxyethylene ether (n-5) and 260kg of nano surfactant WX302S, and fully stirring uniformly to obtain low permeability oil reservoir CO 2 The nanometer foam oil washing agent is used for driving.
Comparative example 9 shows that the nano-surfactant WX302S in the formulation of example 1 deviates from the range of 20% -25%, i.e., the CO of low permeability reservoir obtained by adding 260kg of nano-surfactant WX302S (26%) is added 2 The nano-foam oil washing agent is used for driving, and the added nano-surfactant WX302S is removed from the water.
Performance testing
The products prepared in the above examples and comparative examples were compounded to a concentration of 0.5 wt% for performance testing under the following conditions and methods:
test conditions
Testing an instrument: TX-500C type full-range rotary drop interfacial tension measuring instrument, multi-parameter dynamic foam evaluation instrument (TECLIS company, France), constant temperature drying box and super constant temperature water bath.
And (3) testing temperature: the interfacial tension test, the foam performance test and the oil wash rate test are detected according to the oil reservoir temperature of 60 ℃.
Test oil: the method can be used for winning the dehydrated crude oil in a certain area of the oil field.
Test water: water is injected into a certain block of the Shengli oil field, the mineralization degree is 100000mg/L, and the concentration of calcium and magnesium ions is 2000 mg/L.
Test method
1. Preparing a test solution: low permeability reservoir CO prepared by using the method 2 The nano foam oil washing agent for flooding is prepared into 0.5 wt% water solution with water injected into certain area of Shengli oil field.
2. And (3) testing the foam performance:
the foaming volume and the foam half-life of the prepared test solution were measured by a multi-parameter dynamic foam evaluator (TECLIS, france).
2.1 starting the super constant temperature water bath to stabilize the temperature of the super constant temperature water bath at (60 +/-0.1) DEG C, and simultaneously placing the prepared test solution in the water bath for preheating.
2.2, a power switch of the multi-parameter dynamic foam evaluation instrument and a gas source switch of high-purity CO2 (the purity is more than 99.99%) are opened. Before the experiment, the inner wall of the test tube is washed by distilled water, then the inner wall of the test tube is washed by the liquid to be tested, and the washing is completely sufficient until no residual foam exists on the inner wall.
2.3 after the calibration is qualified, setting the air flow speed to be 100mL/min, setting the inflation time to be 100s, clicking 'start', entering a multi-parameter dynamic evaluation interface, and starting the experiment. And after the air inflation is finished, closing the air source. During the experiment, the observation is carried out until the half-life period of the foam appears, and the click is stopped, so that the experiment is ended.
2.4 plotting the change of the instantaneous foam Volume (VF) with time (t), taking the maximum instantaneous volume of foam generated after the gas is filled in the test tube as the foaming volume, and finding out the time taken for the foam volume to decay from the maximum to half as the foam half-life (t 1/2F).
3. And (3) interfacial tension test: the interfacial tension between the test solution and the target block oil sample was measured at 60 ℃ as specified in SY/T5370-2018 at 7.3.4 (rotation speed 5000r/min, density difference calculated as 0.1), and the lowest value of interfacial tension was recorded.
4. And (3) testing the oil washing rate:
4.1 mixing the simulated formation sand with the crude oil of the target block according to the mass ratio of 4:1, putting the mixture into a constant-temperature drying box, aging the mixture for 7 days at the oil reservoir temperature, and stirring the mixture for 1 time every day to uniformly mix the oil sand.
4.2 injecting water into the target block to prepare 100g of 0.5 wt% sample solution, and stirring the sample solution on a magnetic stirrer at the rotating speed of 300r/min for 15min to be tested.
4.3 weigh about 5g of aged oil sands into a 100mL Erlenmeyer flask and weigh m 1 To the nearest 0.001 g.
4.4 adding 50g of the prepared sample solution into the 4.3 sample, fully mixing, and standing for 48h at the oil reservoir temperature.
4.5 dipping the crude oil floating in the sample solution after standing 4.4 and the crude oil adhered on the bottle wall out by clean cotton yarn, pouring out the sample solution, putting the conical bottle in a drying oven at 105 ℃ to be dried to constant weight to obtain m 2 。
4.6 crude oil elution was performed on the sample in 4.5 with petroleum ether until the petroleum ether was colorless. Placing the conical flask with the crude oil completely eluted in a 120 ℃ oven to be dried to constant weight, and weighing to obtain m 3 。
4.7 oil wash was calculated as follows:
in the formula:
sigma-wash oil rate;
m 1 the total mass of the erlenmeyer flask and the oil sand before washing the oil, g;
m 2 the mass of the erlenmeyer flask and the oil sand after oil washing, g;
m 3 total mass of flask and cleaned formation sand, g.
The low permeability reservoir CO obtained in examples 1-6 and comparative examples 1-9 above was used 2 The nano foam oil washing agent for the flooding is subjected to the tests of interfacial tension, foam performance and oil washing rate according to the test methods, and the test results are shown in table 1. Wherein, referring to several related standards, the following standards of each parameter are: interfacial tension less than or equal to 5 x 10 -3 mN/m, the foaming volume is more than or equal to 200mL, the foam half-life period is more than or equal to 60min, and the oil washing rate is more than or equal to 90%.
TABLE 1 Low permeability reservoir CO 2 Performance test of nano-foam oil washing agent for flooding
As can be seen from the above Table 1, the formula provided by the invention enables the obtained low permeability reservoir CO to be obtained under the synergistic effect of the nano surfactant WX302S, the anionic surfactant, the nonionic surfactant and the component ratios thereof 2 The nano foam oil-washing agent for flooding has the interfacial tension less than or equal to 3.6 multiplied by 10 -3 mN/m, the foaming volume is more than or equal to 215mL, the foam half-life period is more than or equal to 75min, the oil washing rate is more than or equal to 92.0 percent and the like, and can obviously improve CO 2 The swept volume of the flooding can be increased, the oil washing efficiency can be improved, the purpose of one agent and double effects can be achieved, and the flooding agent is applied to low-permeability oil reservoir CO 2 Can improve CO to a certain extent in flooding 2 Recovery of the flooding. If a component is missing or the amount of the component used is not within the range defined by the present invention, the detected index is affected, and the component is rejected.
Claims (9)
1. Enhanced CO for low permeability reservoirs 2 The nano foam oil washing agent for the flooding is characterized by comprising, by mass, 20% -25% of a nano surfactant, 12% -22% of an anionic surfactant, 15% -20% of a nonionic surfactant, 5% of a low-carbon alcohol and the balance of water.
2. The nano-foam oil detergent according to claim 1, wherein the nano-surfactant is a nano-surfactant with a code number WX302S, which is commercially available from Ningbo nano-technology Limited and has a particle size of 200nm or less.
3. The nano-foam oil washing agent according to claim 1, wherein the anionic surfactant is sodium cocoyl methyl taurate, and the formula of the surfactant is as follows:
RCON(CH 3 )CH 2 CH 2 SO 3 Na
wherein R represents coconut oil acid.
4. The nano-foam oil washing agent as claimed in claim 1, wherein the nonionic surfactant is isomeric fatty lauryl polyoxyethylene ether, and the molecular formula of the nonionic surfactant is as follows:
RO(CH 2 CH 2 O) n H
wherein R ═ C 10 H 21 And n is any value selected from 5, 6, 7, 8, 9 and 10.
5. The nano-foam oil washing agent according to claim 1, wherein the lower alcohol is at least one selected from ethanol and isopropanol.
6. Low permeability reservoir CO according to any of claims 1-5 2 The preparation method of the nano foam oil washing agent for the flooding is characterized by comprising the following steps of:
preheating anionic surfactant to above 40 deg.C in advance to melt it from solid state to liquid state, adding into reaction kettle, adding low carbon alcohol, stirring at 40-50 deg.C, adding water, stirring for 20-40min, adding nonionic surfactant and nanometer surfactant, stirring completely to obtain low permeability oil reservoir CO 2 The nanometer foam oil washing agent is used for driving.
7. Low permeability reservoir CO according to any of claims 1-5 2 The nano foam oil-washing agent for flooding has the permeability of (0.1-50) x 10 at the temperature of the stratum being less than or equal to 150 DEG C -3 μm 2 Low permeability reservoir CO with stratum water salinity less than or equal to 100000mg/L and calcium and magnesium ion concentration less than or equal to 2000mg/L 2 Application in driving.
8. The use according to claim 7, wherein the low permeability reservoir CO is 2 Drive nano-foamThe concentration of the oil-washing agent used was 0.5 wt%.
9. The use according to claim 7 or 8, wherein the interfacial tension is 3.6 x 10 or less when compatible with an aqueous phase having a degree of mineralization of 100000mg/L or less and a calcium and magnesium ion concentration of 2000mg/L or less -3 mN/m, the foaming volume is more than or equal to 215mL, the foam half-life period is more than or equal to 75min, and the oil washing rate is more than or equal to 92.0%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115895626A (en) * | 2022-11-09 | 2023-04-04 | 山东新港化工有限公司 | Enhanced CO for low permeability reservoirs 2 Corrosion inhibition type nano foam oil washing agent for flooding and preparation method and application thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103045221A (en) * | 2011-10-17 | 2013-04-17 | 中国石油天然气股份有限公司 | Surfactant flooding system and application thereof |
| CN111088025A (en) * | 2018-10-23 | 2020-05-01 | 中国石油化工股份有限公司 | Efficient oil washing agent for improving carbon dioxide oil displacement efficiency and preparation method and application thereof |
| CN111826149A (en) * | 2020-07-20 | 2020-10-27 | 宁波锋成先进能源材料研究院 | Modified nano silicon dioxide and preparation method and application thereof |
| CN113583650A (en) * | 2021-08-27 | 2021-11-02 | 山东新港化工有限公司 | Viscosity-reducing oil displacement agent for viscosity-reducing composite flooding of common heavy oil reservoir and preparation method and application thereof |
| CN114106809A (en) * | 2021-12-10 | 2022-03-01 | 宁波锋成先进能源材料研究院有限公司 | Polymer flooding synergist, preparation method thereof and application of polymer flooding synergist in low-molecular-weight polymer synergistic system |
| CN114316939A (en) * | 2022-01-05 | 2022-04-12 | 东北石油大学 | Carbon dioxide gas soluble foaming agent suitable for compact reservoir |
| CN114410286A (en) * | 2021-12-31 | 2022-04-29 | 宁波锋成先进能源材料研究院有限公司 | Temperature-resistant salt-tolerant nano-imbibition oil displacement agent and preparation method and application thereof |
| CN114774096A (en) * | 2022-05-27 | 2022-07-22 | 山东新港化工有限公司 | Temperature-resistant salt-resistant nano-imbibition displacement agent for oil displacement of low-permeability reservoir and preparation method and application thereof |
-
2022
- 2022-08-09 CN CN202210949801.7A patent/CN115109575B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103045221A (en) * | 2011-10-17 | 2013-04-17 | 中国石油天然气股份有限公司 | Surfactant flooding system and application thereof |
| CN111088025A (en) * | 2018-10-23 | 2020-05-01 | 中国石油化工股份有限公司 | Efficient oil washing agent for improving carbon dioxide oil displacement efficiency and preparation method and application thereof |
| CN111826149A (en) * | 2020-07-20 | 2020-10-27 | 宁波锋成先进能源材料研究院 | Modified nano silicon dioxide and preparation method and application thereof |
| CN113583650A (en) * | 2021-08-27 | 2021-11-02 | 山东新港化工有限公司 | Viscosity-reducing oil displacement agent for viscosity-reducing composite flooding of common heavy oil reservoir and preparation method and application thereof |
| CN114106809A (en) * | 2021-12-10 | 2022-03-01 | 宁波锋成先进能源材料研究院有限公司 | Polymer flooding synergist, preparation method thereof and application of polymer flooding synergist in low-molecular-weight polymer synergistic system |
| CN114410286A (en) * | 2021-12-31 | 2022-04-29 | 宁波锋成先进能源材料研究院有限公司 | Temperature-resistant salt-tolerant nano-imbibition oil displacement agent and preparation method and application thereof |
| CN114316939A (en) * | 2022-01-05 | 2022-04-12 | 东北石油大学 | Carbon dioxide gas soluble foaming agent suitable for compact reservoir |
| CN114774096A (en) * | 2022-05-27 | 2022-07-22 | 山东新港化工有限公司 | Temperature-resistant salt-resistant nano-imbibition displacement agent for oil displacement of low-permeability reservoir and preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 张邦全等: "椰油酰基甲基牛磺酸钠的泡沫特性应用探讨", 《口腔护理用品工业》, vol. 1, pages 198 - 18 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115895626A (en) * | 2022-11-09 | 2023-04-04 | 山东新港化工有限公司 | Enhanced CO for low permeability reservoirs 2 Corrosion inhibition type nano foam oil washing agent for flooding and preparation method and application thereof |
| CN115895626B (en) * | 2022-11-09 | 2023-10-10 | 山东新港化工有限公司 | Low permeability reservoir potentiating CO 2 Corrosion inhibition type nano foam oil washing agent for driving and preparation method and application thereof |
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