CN119119990A - Low-temperature high-viscosity oil well viscosity reducing and drainage aid, and preparation method and use method thereof - Google Patents
Low-temperature high-viscosity oil well viscosity reducing and drainage aid, and preparation method and use method thereof Download PDFInfo
- Publication number
- CN119119990A CN119119990A CN202411156260.8A CN202411156260A CN119119990A CN 119119990 A CN119119990 A CN 119119990A CN 202411156260 A CN202411156260 A CN 202411156260A CN 119119990 A CN119119990 A CN 119119990A
- Authority
- CN
- China
- Prior art keywords
- viscosity
- low
- temperature
- reducing
- well
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003129 oil well Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims description 31
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 239000010779 crude oil Substances 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 239000012188 paraffin wax Substances 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims description 36
- 239000011259 mixed solution Substances 0.000 claims description 29
- 239000000243 solution Substances 0.000 claims description 22
- 239000003638 chemical reducing agent Substances 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 14
- XUJLWPFSUCHPQL-UHFFFAOYSA-N 11-methyldodecan-1-ol Chemical compound CC(C)CCCCCCCCCCO XUJLWPFSUCHPQL-UHFFFAOYSA-N 0.000 claims description 12
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 12
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 12
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 12
- UGDAWAQEKLURQI-UHFFFAOYSA-N 2-(2-hydroxyethoxy)ethanol;hydrate Chemical compound O.OCCOCCO UGDAWAQEKLURQI-UHFFFAOYSA-N 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 239000013051 drainage agent Substances 0.000 claims 11
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound 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 3
- 150000008051 alkyl sulfates Chemical class 0.000 claims 3
- 229910052708 sodium Inorganic materials 0.000 claims 3
- 239000011734 sodium Substances 0.000 claims 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims 3
- 239000004711 α-olefin Substances 0.000 claims 3
- 239000002994 raw material Substances 0.000 claims 1
- 239000000654 additive Substances 0.000 abstract description 43
- 230000000996 additive effect Effects 0.000 abstract description 43
- 239000003921 oil Substances 0.000 abstract description 17
- 239000003795 chemical substances by application Substances 0.000 abstract description 15
- 239000011435 rock Substances 0.000 abstract description 10
- 239000004094 surface-active agent Substances 0.000 abstract description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract description 3
- 239000002904 solvent Substances 0.000 abstract description 3
- 239000003945 anionic surfactant Substances 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract description 2
- 239000003814 drug Substances 0.000 abstract description 2
- 239000002736 nonionic surfactant Substances 0.000 abstract description 2
- 239000002105 nanoparticle Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- -1 ethoxylated sodium alkyl sulfate Chemical class 0.000 description 18
- 238000011084 recovery Methods 0.000 description 8
- 229910052938 sodium sulfate Inorganic materials 0.000 description 6
- 235000011152 sodium sulphate Nutrition 0.000 description 6
- 239000001993 wax Substances 0.000 description 6
- 239000000295 fuel oil Substances 0.000 description 5
- 238000005457 optimization Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- 238000010793 Steam injection (oil industry) Methods 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- 239000005696 Diammonium phosphate Substances 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 150000008052 alkyl sulfonates Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 1
- 229910000388 diammonium phosphate Inorganic materials 0.000 description 1
- 235000019838 diammonium phosphate Nutrition 0.000 description 1
- 238000003113 dilution method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000004530 micro-emulsion Substances 0.000 description 1
- 238000000120 microwave digestion Methods 0.000 description 1
- 239000010841 municipal wastewater Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000006072 paste Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000009736 wetting Methods 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
- C09K8/584—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
-
- 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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing or limiting, e.g. eliminating, the deposition of paraffins or like substances
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/16—Facilitating the conveyance of liquids or effecting the conveyance of viscous products by modification of their viscosity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/16—Facilitating the conveyance of liquids or effecting the conveyance of viscous products by modification of their viscosity
- F17D1/17—Facilitating the conveyance of liquids or effecting the conveyance of viscous products by modification of their viscosity by mixing with another liquid, i.e. diluting
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geochemistry & Mineralogy (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Public Health (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Materials Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention relates to the technical field of viscosity reduction of compound surfactants, and discloses a low-temperature Gao Nianyou well viscosity reduction cleanup additive, a preparation method and application thereof. The low-temperature Gao Nianyou-well viscosity-reducing cleanup additive anionic surfactant, nonionic surfactant, alcohol solvent, paraffin removal agent and water are compounded at normal temperature, and the high-viscosity oil-well viscosity-reducing cleanup additive solution is contacted with high-viscosity crude oil on the surface of stratum rock for 3 to 5 days, so that well opening production can be realized. The viscosity-reducing cleanup additive for the low-temperature high-viscosity oil well can effectively overcome the influence of reservoir temperature lower than 50 ℃, can be quickly contacted with thick oil on the surface of rock, can quickly reduce the surface tension of crude oil, enables the crude oil to be peeled off the surface of the rock, can continuously gather and expand nano-sized particle type oil droplets, and simultaneously, can be adsorbed on the pipe wall to form a layer of medicament film, so that the friction between the crude oil and the pipe wall can be effectively reduced for a long time, and the lifting efficiency of a shaft and the pipeline conveying capacity can be improved.
Description
Technical Field
The invention relates to the technical field of viscosity reduction of compound surfactants, and discloses a low-temperature Gao Nianyou well viscosity reduction cleanup additive, a preparation method and a use method thereof.
Background
The exploitation modes of the heavy oil reservoir mainly comprise a thermal oil exploitation method, a chemical oil exploitation method, a biological oil exploitation method, a viscosity reduction method, a dilution method and an electrothermal method. Chemical oil recovery method a method for improving crude oil recovery by injecting chemical reagent into heavy oil reservoir , wherein surfactant flooding and microemulsion flooding are two chemical flooding methods with highest efficiency , proper exploitation mode is selected according to different types of heavy oil reservoirs and geological conditions , and is important for improving recovery and economic benefit.
The oil displacement agent is a chemical agent for increasing the yield of an oil well, and the principle is that the adhesion force and the surface tension between crude oil and rock in a reservoir of the oil well are reduced by changing the physical and chemical environments inside the oil well, so that the crude oil flows more easily and the recovery ratio is improved. The application of the oil displacement agent can be selected according to the characteristics of the oil reservoir and the requirements of recovery. Different oil reservoirs may require different oil-displacing agent formulations and injection patterns.
The heavy oil old area generally enters the steam injection development end stage, and due to the serious loss of a ground pipe network, the floor drain, the environment pollution and the like, partial wells cannot be injected with steam normally, and the single well yield is low or the single well production cannot be produced normally. Therefore, oil reservoirs in different layers, different types and different development stages are screened, and a low-temperature Gao Nianyou well viscosity-reducing cleanup additive with high applicability is required to be developed by optimizing various measures, so that the development effect of a production well is improved, and the recovery ratio of a cold recovery development block of a heavy oil well is improved. A
Disclosure of Invention
The invention provides a preparation method and application thereof, overcomes the defects of the prior art, and can effectively solve the problems of low single well yield or incapability of normal production caused by thick oil and low temperature in the existing thick oil well cold production development block.
The viscosity-reducing cleanup additive for the low-temperature Gao Nianyou well is realized by adopting the following measures, and comprises, by weight, 4 to 8 parts of diethylene glycol ether, 3 to 9 parts of ethoxylated sodium alkyl sulfate, 2 to 6 parts of alpha alkenyl sulfonate, 2 to 4 parts of sodium dodecyl benzene sulfonate, 2 to 4 parts of isotridecanol, 2 parts of a paraffin remover and 85 to 67 parts of water.
The following is a further optimization and/or improvement of the first technical scheme of the invention:
The viscosity-reducing cleanup additive for the low-temperature high-viscosity oil well is prepared by the following steps:
Firstly, mixing a required amount of diethylene glycol ether and water at normal temperature, and stirring to obtain a first mixed solution;
Secondly, mixing required amounts of ethoxylated alkyl sodium sulfate, alpha alkenyl sulfonate, sodium dodecyl benzene sulfonate and isotridecyl alcohol into a first mixed solution at normal temperature, and stirring to obtain a second mixed solution;
Thirdly, adding a required amount of paraffin removal agent into the second mixed solution, and uniformly stirring to obtain the low-temperature Gao Nianyou-well viscosity-reducing drainage-aiding agent.
In the first step, the stirring time is 10 minutes to 30 minutes.
In the second step, the stirring time is 2 to 4 hours.
The second technical scheme of the invention is realized by the following measures that the preparation method of the low-temperature Gao Nianyou well viscosity-reducing cleanup additive is carried out according to the following steps:
Firstly, mixing a required amount of diethylene glycol ether and water at normal temperature, and stirring to obtain a first mixed solution;
Secondly, mixing required amounts of ethoxylated alkyl sodium sulfate, alpha alkenyl sulfonate, sodium dodecyl benzene sulfonate and isotridecyl alcohol into a first mixed solution at normal temperature, and stirring to obtain a second mixed solution;
Thirdly, adding a required amount of paraffin removal agent into the second mixed solution, and uniformly stirring to obtain the low-temperature Gao Nianyou-well viscosity-reducing drainage-aiding agent.
The following is a further optimization and/or improvement of the second technical scheme of the invention:
In the first step, the stirring time is 10 minutes to 30 minutes.
In the second step, the stirring time is 2 to 4 hours.
The third technical scheme of the invention is realized by the following steps of a using method of the low-temperature Gao Nianyou well viscosity-reducing cleanup additive, which comprises the following steps:
The method comprises the steps of firstly, closing a production gate and a back pressure gate, injecting 80% of the total amount of water in a required proportion into a stirring tank, then injecting a low-temperature Gao Nianyou-well viscosity-reducing cleanup additive in a corresponding proportion, after uniform mixing, injecting the rest 20% of water into a mixed solution until the mixed solution is completely and uniformly mixed, and obtaining a low-temperature Gao Nianyou-well viscosity-reducing cleanup additive solution;
secondly, pumping the low-temperature Gao Nianyou well viscosity-reducing cleanup additive solution into a sleeve by using a pump truck, and entering a stratum;
thirdly, after the low-temperature Gao Nianyou well viscosity-reducing cleanup additive solution is contacted with the high-viscosity crude oil for a certain time, the well is opened for production.
The following is a further optimization and/or improvement of the third aspect of the present invention:
In the first step, the preparation concentration of the viscosity-reducing cleanup additive solution for the high-viscosity oil well is 5-8%.
In the third step, the contact time of the viscosity-reducing cleanup additive solution of the high-viscosity oil well and crude oil is 3 to 5 days.
The viscosity-reducing cleanup additive for the low-temperature high-viscosity oil well can effectively overcome the influence of reservoir temperature lower than 50 ℃, quickly contacts with thick oil on the surface of rock to form a layer of medicament film, effectively reduces friction between crude oil and the pipe wall for a long time, improves lifting efficiency of a shaft and pipeline conveying capacity, and achieves the purposes of reducing viscosity and increasing yield.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments can be determined according to the technical scheme and practical situations of the present invention. The solutions in the present invention are aqueous solutions in which the solvent is water unless otherwise specified, and the normal temperature and room temperature in the present invention generally refer to temperatures of 15 ℃ to 25 ℃, and are generally defined as 25 ℃.
The invention is further described below with reference to examples:
The low-temperature Gao Nianyou-well viscosity-reducing cleanup additive comprises, by weight, 4 to 8 parts of diethylene glycol ether, 3 to 9 parts of ethoxylated sodium alkyl sulfate, 2 to 6 parts of alpha alkenyl sulfonate, 2 to 4 parts of sodium dodecyl benzene sulfonate, 2 to 4 parts of isotridecyl alcohol, 2 parts of paraffin remover and 85 to 67 parts of water.
In the invention, ethoxylated alkyl sodium sulfate, alpha alkenyl sulfonate and sodium dodecyl benzene sulfonate are taken as anionic surfactants, and isotridecyl alcohol is taken as nonionic surfactant. The ethoxylated alkyl sodium sulfate as main component can resist low temperature of 10-50 deg.c and may be used in cold production to reduce viscosity, and has certain antifreezing effect owing to the components in different forms including solid, liquid, paste, etc. and the high solubility diethylene glycol ether as solvent and high smelting point (-6.5 deg.c).
The wax remover used in the invention is a wax remover sold by Clariaceae Australian Petroleum and gas technologies Co., ltd, and the model number is KRQ-1, and the main components of the wax remover are benzene mixture, 2% ethanol and diammonium phosphate. At low temperature, dispersed wax crystals in crude oil are gathered on the pipe wall to form large-area solid wax, and the wax remover can effectively solve the problem.
Example 2, the low temperature Gao Nianyou well viscosity reducing cleanup additive is prepared according to the following steps:
Firstly, mixing a required amount of diethylene glycol ether and water at normal temperature, and stirring to obtain a first mixed solution;
Secondly, mixing required amounts of ethoxylated alkyl sodium sulfate, alpha alkenyl sulfonate, sodium dodecyl benzene sulfonate and isotridecyl alcohol into a first mixed solution at normal temperature, and stirring to obtain a second mixed solution;
Thirdly, adding a required amount of paraffin removal agent into the second mixed solution, and uniformly stirring to obtain the low-temperature Gao Nianyou-well viscosity-reducing drainage-aiding agent.
The method can be further optimized or/and improved according to actual needs:
Example 3 As an optimization of the above example, in the first step, the stirring time was 10 minutes to 30 minutes.
Example 4 As an optimization of the above example, in the second step, the stirring time was 2 to 4 hours.
Example 5 the preparation method of the low temperature Gao Nianyou well viscosity reduction cleanup additive is carried out according to the following steps:
Firstly, mixing a required amount of diethylene glycol ether and water at normal temperature, and stirring to obtain a first mixed solution;
Secondly, mixing required amounts of ethoxylated alkyl sodium sulfate, alpha alkenyl sulfonate, sodium dodecyl benzene sulfonate and isotridecyl alcohol into a first mixed solution at normal temperature, and stirring to obtain a second mixed solution;
Thirdly, adding a required amount of paraffin removal agent into the second mixed solution, and uniformly stirring to obtain the low-temperature Gao Nianyou-well viscosity-reducing drainage-aiding agent.
The method can be further optimized or/and improved according to actual needs:
Example 6 in the first step, the stirring time was 10 minutes to 30 minutes.
Example 7 in the second step, the stirring time was 2 to 4 hours.
Example 8A method for using a high viscosity oil well viscosity reducing cleanup additive is characterized by comprising the following steps:
The method comprises the steps of firstly, closing a production gate and a back pressure gate, injecting 80% of the total amount of water in a required proportion into a stirring tank, then injecting a low-temperature Gao Nianyou-well viscosity-reducing cleanup additive in a corresponding proportion, after uniform mixing, injecting the rest 20% of water into a mixed solution until the mixed solution is completely and uniformly mixed, and obtaining a low-temperature Gao Nianyou-well viscosity-reducing cleanup additive solution;
secondly, pumping the low-temperature Gao Nianyou well viscosity-reducing cleanup additive solution into a sleeve by using a pump truck, and entering a stratum;
thirdly, after the low-temperature Gao Nianyou well viscosity reduction cleanup additive solution is contacted with the high-viscosity crude oil for a required time, the well is opened for production.
The method can be further optimized or/and improved according to actual needs:
Example 9 in the first step, the viscosity reducing and cleanup additive solution for high viscosity oil well was formulated at a concentration of 5% to 8%.
Example 10 in the third step, the contact time of the viscosity reducing and cleanup additive solution of the low temperature and high viscosity oil well with crude oil is 3 days to 5 days.
According to the requirement, the contact time of the low-temperature high-viscosity oil well viscosity reduction cleanup additive solution and crude oil is formulated according to the difference of the crude oil viscosity of an oil reservoir stratum, and the contact time of low-viscosity crude oil with the viscosity ranging from 100 mPas to 5000 mPas is generally set to 3 days, and the contact time of high-viscosity crude oil with the viscosity ranging from 5 to 20 thousand mPas is generally set to 5 days.
Example 11 the low temperature Gao Nianyou well viscosity reducing cleanup additive is prepared by the following method:
firstly, mixing 4 parts of diethylene glycol ether with 85 parts of water at normal temperature, stirring for 10 to 30 minutes, then adding 3 parts of ethoxylated sodium alkyl sulfate, 2 parts of alpha alkenyl sulfonate, 2 parts of sodium dodecyl benzene sulfonate and 2 parts of isotridecyl alcohol, mixing and stirring for 4 hours at normal temperature, and finally, adding 2 parts of paraffin removal agent and stirring uniformly to obtain the low-temperature Gao Nianyou-well viscosity-reducing cleanup additive.
Example 12 the low temperature Gao Nianyou well viscosity reducing cleanup additive is prepared by the following method:
firstly, 8 parts of diethylene glycol ether and 67 parts of water are mixed at normal temperature and stirred for 10 to 30 minutes, then 9 parts of ethoxylated sodium alkyl sulfate, 6 parts of alpha alkenyl sulfonate, 4 parts of sodium dodecyl benzene sulfonate and 4 parts of isotridecyl alcohol are added, and mixed and stirred for 3 hours at normal temperature, and finally, 2 parts of paraffin removal agent is added and stirred uniformly to obtain the low-temperature Gao Nianyou-well viscosity-reducing cleanup additive.
The system dispersibility, the initial apparent viscosity, the system stability dewatering reduction value, the organic chlorine content and the metal content of the low-temperature Gao Nianyou well viscosity reduction cleanup additive obtained in examples 11 to 12 are analyzed and detected according to Q/XKA 242-2021 SY/T7329-2016 (viscosity reducer alkyl sulfonate for oil extraction) and KXDQ-10 (method for measuring the content of organic chlorine in oilfield chemicals) CJ/T221-2005 (method for testing sludge in municipal wastewater treatment plant) HJ 702-2014 (method for measuring mercury, arsenic, selenium, bismuth and antimony) by microwave digestion/atomic fluorescence, and the detection results are shown in Table 1, wherein the system dispersibility, the initial apparent viscosity, the system stability dewatering reduction value, the organic chlorine content, the cyanide and the metal content of the obtained low-temperature Gao Nianyou well viscosity reduction cleanup additive all meet standard requirements in the technological parameter range defined by the application.
Example 13 the low temperature Gao Nianyou well viscosity reducing cleanup additive was put into use as follows:
firstly, closing a production gate and a back pressure gate, preparing low-temperature Gao Nianyou well viscosity-reducing cleanup additive solution with required concentration by using a stirring tank, then, pumping into a sleeve to enter a stratum by using a pump truck, and finally, contacting the low-temperature high-viscosity oil well viscosity-reducing cleanup additive solution with high-viscosity crude oil on the surface of stratum rock for 3 days, so that well-opening production can be realized.
The alkaline surfactant can efficiently reduce the oil-water surface tension, approaches neutral wetting, and achieves the purposes of squeezing liquid, reducing viscosity and increasing yield.
Example 14 the difference from example 13 is that the high viscosity oil well viscosity reducing cleanup additive solution was contacted with the high viscosity crude oil on the surface of the formation rock for a period of 4 days.
Example 15 the difference from example 13 is that the high viscosity oil well viscosity reducing cleanup additive solution is in contact with the high viscosity crude oil on the surface of the formation rock for a period of 5 days.
Comparative example 1 the difference from example 15 is that the high viscosity crude oil on the surface of the formation rock is not injected with the high viscosity well viscosity reducing cleanup additive solution.
The crude oil production data obtained in examples 13 to 15 and the crude oil production data obtained in comparative example 1 were subjected to detection analysis, and the results are shown in table 2. It can be seen from table 2 that the viscosity of the obtained crude oil is remarkably reduced, the surface tension of oil and water is remarkably reduced, and the yield of crude oil is greatly improved within the process parameters defined in the present application.
In summary, the preparation method of the invention is simple and easy to implement, the obtained low-temperature Gao Nianyou well viscosity-reducing cleanup additive can not only effectively overcome the influence of reservoir temperature lower than 50 ℃, rapidly contact with thick oil on the surface of rock and improve the lifting efficiency of a shaft and the pipeline conveying capacity, but also has the degradation rate of the low-temperature Gao Nianyou well viscosity-reducing cleanup additive more than 90 percent, is nontoxic, does not cause pollution to the environment, belongs to clean environment-friendly viscosity-reducing cleanup additive, and is suitable for cold recovery development blocks of edge oil wells not in a steam injection pipe network, low-yield wells with insufficient steam injection and thick oil wells with high crude oil viscosity.
The technical characteristics form the embodiment of the invention, have stronger adaptability and implementation effect, and can increase or decrease unnecessary technical characteristics according to actual needs so as to meet the requirements of different situations.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411156260.8A CN119119990A (en) | 2024-08-22 | 2024-08-22 | Low-temperature high-viscosity oil well viscosity reducing and drainage aid, and preparation method and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411156260.8A CN119119990A (en) | 2024-08-22 | 2024-08-22 | Low-temperature high-viscosity oil well viscosity reducing and drainage aid, and preparation method and use method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN119119990A true CN119119990A (en) | 2024-12-13 |
Family
ID=93761199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411156260.8A Pending CN119119990A (en) | 2024-08-22 | 2024-08-22 | Low-temperature high-viscosity oil well viscosity reducing and drainage aid, and preparation method and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN119119990A (en) |
-
2024
- 2024-08-22 CN CN202411156260.8A patent/CN119119990A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2415900C2 (en) | Method and composition to clean borehole prior to cementing | |
| US3700031A (en) | Secondary recovery and well stimulation, solutions, and methods of use | |
| AU2013400744B2 (en) | Adjusting surfactant concentrations during hydraulic fracturing | |
| CN102746838B (en) | Blocking remover for gas well shaft | |
| US5904208A (en) | Method of cleaning a well bore prior to cementing | |
| US2800963A (en) | Method and composition for sealing earth formation | |
| CN108690588A (en) | Environment-friendly type de-plugging of well system, preparation method and its method for removing blockage | |
| US6143709A (en) | Well cleaning stimulation and purging method | |
| CN109763127B (en) | Quick dissolving solution for soluble bridge plug and preparation method thereof | |
| CN115418211B (en) | Thickened oil viscosity-reducing oil displacement agent and preparation method thereof | |
| CN104263339A (en) | Oil-based drilling fluid shaft completion cleaning fluid and preparation method thereof | |
| CN104449648A (en) | Drag reducer for slickwater fracturing on unconventional oil and gas reservoirs and preparation method of drag reducer | |
| US6196320B1 (en) | Method of cleaning a well bore prior to installing a water based fluid system | |
| CN106867489A (en) | Cleaning solution for removing oil sludge pollution of oil-based drilling fluid | |
| CN116396736A (en) | Efficient flushing agent for oil-based mud for well cementation and preparation method thereof | |
| CN108559481A (en) | A kind of low leak-off acidification oil well blockages relieving fluid and preparation method thereof | |
| CN112708406A (en) | Biochemical composite blocking remover and preparation method and application thereof | |
| CN119119990A (en) | Low-temperature high-viscosity oil well viscosity reducing and drainage aid, and preparation method and use method thereof | |
| CN1209439C (en) | Oil-based mud flushing liquor and preparation method thereof | |
| CN102925127B (en) | A kind of oil well acidation pretreating agent | |
| CN105038752A (en) | Compound oil-displacing agent for high temperature reservoir and compound oil-displacing system | |
| US20190010383A1 (en) | Self-degradable diverters for propped fracture acidizing | |
| US6455483B1 (en) | Well stimulation and formation purging composition | |
| CN110862810B (en) | Cleaning agent for efficient well flushing fluid and preparation method thereof | |
| CN111946309B (en) | Cold damage prevention dredging agent for low temperature resistant oil reservoir |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |