CN107384349A - A kind of double slug profile control agents of hypotonic duct type oil deposit deep part and its application method - Google Patents
A kind of double slug profile control agents of hypotonic duct type oil deposit deep part and its application method Download PDFInfo
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- CN107384349A CN107384349A CN201710663786.9A CN201710663786A CN107384349A CN 107384349 A CN107384349 A CN 107384349A CN 201710663786 A CN201710663786 A CN 201710663786A CN 107384349 A CN107384349 A CN 107384349A
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 116
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 113
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 claims abstract description 50
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims abstract description 32
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 27
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229960004889 salicylic acid Drugs 0.000 claims abstract description 25
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 21
- 235000019795 sodium metasilicate Nutrition 0.000 claims abstract description 21
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 21
- 239000004927 clay Substances 0.000 claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- 229920000642 polymer Polymers 0.000 claims abstract description 20
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims abstract description 17
- 235000010265 sodium sulphite Nutrition 0.000 claims abstract description 16
- 239000003381 stabilizer Substances 0.000 claims abstract description 15
- ZUGAOYSWHHGDJY-UHFFFAOYSA-K 5-hydroxy-2,8,9-trioxa-1-aluminabicyclo[3.3.2]decane-3,7,10-trione Chemical compound [Al+3].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O ZUGAOYSWHHGDJY-UHFFFAOYSA-K 0.000 claims abstract description 14
- 239000004094 surface-active agent Substances 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 239000003921 oil Substances 0.000 claims description 81
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 45
- 238000002347 injection Methods 0.000 claims description 31
- 239000007924 injection Substances 0.000 claims description 31
- 238000002360 preparation method Methods 0.000 claims description 24
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 claims description 24
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims description 15
- 235000010299 hexamethylene tetramine Nutrition 0.000 claims description 14
- 229960004011 methenamine Drugs 0.000 claims description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 12
- 239000001301 oxygen Substances 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 10
- 239000003814 drug Substances 0.000 claims description 8
- -1 perfluoroalkyl betain Chemical compound 0.000 claims description 6
- 235000019270 ammonium chloride Nutrition 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- DDXLVDQZPFLQMZ-UHFFFAOYSA-M dodecyl(trimethyl)azanium;chloride Chemical compound [Cl-].CCCCCCCCCCCC[N+](C)(C)C DDXLVDQZPFLQMZ-UHFFFAOYSA-M 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
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- 239000010865 sewage Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
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- 230000000996 additive effect Effects 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 claims description 2
- 229960004106 citric acid Drugs 0.000 claims description 2
- 238000013461 design Methods 0.000 claims description 2
- 229960001755 resorcinol Drugs 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 230000003068 static effect Effects 0.000 claims description 2
- 244000248349 Citrus limon Species 0.000 claims 1
- 235000005979 Citrus limon Nutrition 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 1
- 229910052782 aluminium Inorganic materials 0.000 claims 1
- 239000004411 aluminium Substances 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 abstract description 27
- 238000011084 recovery Methods 0.000 abstract description 17
- 230000008569 process Effects 0.000 abstract description 14
- 239000000084 colloidal system Substances 0.000 abstract description 5
- 230000008961 swelling Effects 0.000 abstract description 4
- 230000007812 deficiency Effects 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 2
- 239000011435 rock Substances 0.000 description 76
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 36
- 238000005086 pumping Methods 0.000 description 21
- 230000000694 effects Effects 0.000 description 20
- 238000002474 experimental method Methods 0.000 description 20
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 12
- 238000007789 sealing Methods 0.000 description 12
- 230000035699 permeability Effects 0.000 description 10
- 238000004088 simulation Methods 0.000 description 10
- 239000010779 crude oil Substances 0.000 description 9
- 239000012153 distilled water Substances 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 7
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- 238000012360 testing method Methods 0.000 description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- 239000006004 Quartz sand Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 229940123973 Oxygen scavenger Drugs 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 241000219000 Populus Species 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
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- 238000011161 development Methods 0.000 description 2
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- 239000002270 dispersing agent Substances 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000010148 water-pollination Effects 0.000 description 2
- 239000001993 wax Substances 0.000 description 2
- 235000016068 Berberis vulgaris Nutrition 0.000 description 1
- 241000335053 Beta vulgaris Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 241000237858 Gastropoda Species 0.000 description 1
- 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 description 1
- 101150042248 Mgmt gene Proteins 0.000 description 1
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- 206010070863 Toxicity to various agents Diseases 0.000 description 1
- UKTDQTGMXUHPIF-UHFFFAOYSA-N [Na].S(O)(O)=O Chemical compound [Na].S(O)(O)=O UKTDQTGMXUHPIF-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
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- 230000001965 increasing effect Effects 0.000 description 1
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- 238000001764 infiltration Methods 0.000 description 1
- 125000001400 nonyl group Chemical group [H]C([*])([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])[H] 0.000 description 1
- 125000005010 perfluoroalkyl group Chemical group 0.000 description 1
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- 239000011734 sodium Substances 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/5045—Compositions based on water or polar solvents containing inorganic compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/5083—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/512—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
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- 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
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/588—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 polymers
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- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/138—Plastering the borehole wall; Injecting into the formation
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
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- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
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- Oil, Petroleum & Natural Gas (AREA)
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- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
A kind of double slug profile control agents of hypotonic duct type oil deposit deep part and its application method, are related to field use chemical field.The present invention is injected in hypotonic duct type oil reservoir by double slug forms, preposed attributives mixing sodium metasilicate, partially hydrolyzed polyacrylamide (PHPA), calgon, sodium sulfite, salicylic acid, aluminium citrate, with low viscosity, the characteristic that mobility is strong, anti-shear ability is strong, the hypertonic duct in oil reservoir inside can be implemented to block；Rearmounted slug uses low molecule quality Complex polymer, and adds appropriate clay stabilizer and surfactant, possesses compared with low-viscosity, can suppress clay swelling phenomenon in displacement process, improves the phenomenon that wax, colloid, asphalitine deposit near wellbore zone；Improve Reservoir Heterogeneity by way of double slug combinations, increase sequent water flooding sweep efficiency, suppress hypotonic duct type oil reservoir region of bypassed oil and formed, to improve traditional oil production method to drawbacks such as the hypotonic low, deficiencies in economic performance of duct type oil recovery.
Description
Technical field
The present invention relates to a kind of double slug profile control agents of hypotonic duct type oil deposit deep part and its application method, the profile control agent to change
Kind reservoir adaptability, and then hypotonic duct type oil reservoir oil increasing effect can be improved, belong to field use chemical agent field.
Background technology
The waterflood recovery efficiency factor aggregate level of China's onshore oil field is relatively low, and generally below 50%, one of its major reason is water
The sweep efficiency of drive is relatively low；A key factor for influenceing water drive sweep efficiency is anisotropism；Hypotonic duct type oil reservoir has
Permeability is low, pore throat is wide and the feature of microcrack development, due to the complexity and rock surface property of pore structure, hypotonic duct
Type oil reservoir equally exists anisotropism；So that during water drive, the propulsion of water equably piston type can not advance, and cause to inject water along height
Infiltration layer section is advanced by leaps and bounds, and local water breakthrough phenomenon occurs, so as to reduce the sweep efficiency of injection water, constrains waterflood recovery efficiency factor.
Traditional method is that its duct is blocked then to carry out water drive, in such a method, simple profile control and follow-up
Water drive be often difficult in adapt to the complexity of reservoir, phenomena such as causing the small-scale water breakthrough after closure, fingering so that further carry
The difficulty of high water-flooding performance is larger.
Recovery efficiency technique demand is improved for hypotonic duct type oil reservoir, the present invention provides a kind of deep double slug profile control agents,
It is set forth above for solving the problems, such as.
The content of the invention
It is an object of the invention to provide a kind of double slug profile control agents of hypotonic duct type oil deposit deep part and its application method, sheet
Invention is injected in hypotonic duct type oil reservoir by double slug forms, preposed attributives mixing sodium metasilicate, partially hydrolyzed polyacrylamide (PHPA),
Calgon, sodium sulfite, salicylic acid, aluminium citrate, there is low viscosity, the characteristic that mobility is strong, anti-shear ability is strong, can
The hypertonic duct in oil reservoir inside is implemented to block；Rearmounted slug uses low molecule quality Complex polymer, and it is steady to add appropriate clay
Determine agent and surfactant, possess compared with low-viscosity, can suppress clay swelling phenomenon in displacement process, improve wax, colloid,
The phenomenon that asphalitine deposits near wellbore zone；Improve Reservoir Heterogeneity by way of double slug combinations, increase sequent water flooding
Sweep efficiency, suppress hypotonic duct type oil reservoir region of bypassed oil and formed, hypotonic duct type oil reservoir is harvested with improving traditional oil production method
The drawbacks such as rate is low, deficiency in economic performance.
To reach above-mentioned purpose, the present invention adopts the following technical scheme that.
A kind of double slug profile control agents of hypotonic duct type oil deposit deep part, its main component are：Partially hydrolyzed polyacrylamide (PHPA) phase
It is respectively 400*10 to molecular weight4、500*104、800*104、1000*104, sodium metasilicate, calgon, sodium sulfite, bigcatkin willow
Acid, aluminium citrate, clay stabilizer, surfactant, citric acid, resorcinol, methenamine；Wherein clay stabilizer is specific
Can be ammonium chloride, DTAC and other be applied to hypotonic duct type oil reservoir clay stabilizer, surface
Activating agent concretely NPE, neopelex or perfluoroalkyl betain；For hypotonic duct
Type oil reservoir, double slug formula profile control agents are designed, are described below with slug A profile control agents and slug B profile control agents.
Slug A profile control agents include sodium metasilicate, partially hydrolyzed polyacrylamide (PHPA), calgon, sodium sulfite, salicylic acid,
Aluminium citrate；Wherein polyacrylamide molecular mass is 400*104；In slug A profile control agents, sodium metasilicate mass ratio is 1%-2%,
Partially hydrolyzed polyacrylamide (PHPA) mass ratio is 0.05%-0.15%, and calgon mass ratio is 0.2%-0.4%, sulfurous acid
Sodium mass ratio is 0.4%-0.6%, and salicylic acid mass ratio is 0.1%-0.3%, and aluminium citrate mass ratio is 0.15%-
0.25%, remaining components are preparation water.
Preferably, in slug A profile control agents, sodium metasilicate, partially hydrolyzed polyacrylamide (PHPA), calgon, sodium sulfite, water
Poplar acid, aluminium citrate mass ratio are 1.2%-1.8%：0.08%-0.12%：0.25%-0.35%：0.45%-0.55%：
0.15%-0.25%：0.18%-0.22%, remaining components are preparation water.
It is highly preferred that in slug A profile control agents, sodium metasilicate, partially hydrolyzed polyacrylamide (PHPA), calgon, sodium sulfite,
Salicylic acid, aluminium citrate mass ratio are 1.5%：0.1%：0.3%：0.5%：0.2%：0.2%, remaining components are preparation water.
Slug A profile control agent main function mechanism is that sodium metasilicate is as slug A profile control agent hosts, and gel-forming property is good, flowing
Property strong, plastic before viscosity it is low, and possess certain saline-alkaline tolerance, formation water salinity influences smaller on sodium metasilicate；Partial hydrolysis
Polyacrylamide play auxiliary profile control agent effect, by by sodium metasilicate, partially hydrolyzed polyacrylamide (PHPA), aluminium citrate mix can shape
Glomeration cross-linked structure, there is high viscoplasticity, high rheological variation feature, flowed through in oil reservoir adsorbable in duct during macropore
Wall, implement firm closure to duct in oil reservoir；Aluminium citrate has delayed gelation, colloid physical property stabilization, broken glue as crosslinking agent
Time length, salt tolerance effect；The oxygen that sodium sulfite can suppress in process for preparation and in oil reservoir as oxygen scavenger produces to profile control agent
Viscosity reduction effect, so as to strengthen the stability of profile control agent；Calgon plays dispersant effect, can make sodium metasilicate, part water
Polyacrylamide is intermolecular in aqueous more uniformly spreads for solution, increase molecular coil periphery absorption affinity, so as to improve profile control
Plugging effect of the agent in duct；Salicylic acid plays regulation base fluid acidity effect, is firstly added in configuration process, make its with
Underwater gold category ion processed is combined, reduce due to prepare in water salinity it is high caused by precipitation, flocculation, it is same to have necessarily
Crosslinked action；Slug A is mainly used as blocking the hypertonic region in hypotonic duct type oil reservoir or macropore, improves hypotonic duct type
The anisotropism of oil reservoir so that follow-up slug B profile control agents can enter in the duct without closure, make so as to form double slug collaborations
With.
Slug B profile control agents include Complex polymer and additive；Wherein, Complex polymer is by three kinds of different molecular Quality Mgmt Dept
Divide hydrolyzed polyacrylamide composition, molecular mass is respectively 500*104、800*104、1000*104, its mass ratio is 80：15：5；
Additive includes clay stabilizer, surfactant, citric acid, resorcinol, salicylic acid, methenamine；Slug B profile control agents
In, Complex polymer mass ratio is 0.05%-0.1%, and clay stabilizer mass ratio is 0.2%-0.3%, surfactant matter
It is 0.1%-0.3% to measure ratio, and citric acid mass ratio is 0.1%-0.2%, and resorcinol mass ratio is 0.02%-0.03%, water
Poplar acid mass ratio is 0.02%-0.03%, and methenamine mass ratio is 0.02%-0.03%, and remaining components are preparation water.
Preferably, in slug B profile control agents, Complex polymer, clay stabilizer, surfactant, citric acid, isophthalic two
Phenol, salicylic acid, the mass ratio of methenamine are 0.06%-0.09%：0.22%-0.28%：0.15%-0.2%：0.12%-
0.18%：0.022%-0.028%：0.022%-0.028%：0.022%-0.028%, remaining components are preparation water.
It is highly preferred that in slug B profile control agents, Complex polymer, clay stabilizer, surfactant, citric acid, isophthalic two
Phenol, salicylic acid, the mass ratio of methenamine are 0.075%：0.25%：0.175%：0.15%：0.025%：0.025%：
0.025%, remaining components are preparation water.
Slug B profile control agent main function mechanism is to be formed by mixing low molecule quality Complex polymer and methenamine
Profile control agent, possess low viscosity, high stability feature, and appropriate clay stabilizer is added in profile control agent, displacement process can be suppressed
Middle clay swelling phenomenon；Resorcinol plays catalyst action, can shorten the time of configuration profile control agent, make it in operation process
Reduce operating cost；Citric acid, salicylic acid play regulation base fluid acidity effect, are firstly added in configuration process, make its with
Underwater gold category ion processed is combined, reduce due to prepare in water salinity it is high caused by precipitation, flocculation, it is same to have necessarily
Crosslinked action；Appropriate surfactant is added in slug B profile control agents, wax, colloid, asphalitine can be improved near wellbore zone
The phenomenon of deposition, and the hydrophily of oil reservoir can be improved, reach the poly- purpose driven and improve recovery ratio, surfactant is adjusted in slug B
Cut open and be eventually adding in agent process for preparation, to avoid degrading with citric acid, salicylism reaction in configuration process；In slug A
After forming effective closure, slug B profile control agents are injected into oil reservoir, can be driven into raw water and not involve duct implementation displacement, to reduce hole
Residual oil blocks to caused by oil reservoir in road, strengthens its flow conductivity；The present invention improves oil reservoir by way of double slug combinations
Anisotropism, increase sequent water flooding sweep efficiency, suppress hypotonic duct type oil reservoir region of bypassed oil and formed, and by sequent water flooding to oil
Tibetan is further developed.
The application method of the double slug profile control agents of a kind of hypotonic duct type oil deposit deep part, it is characterised in that comprise the following steps：
Step 1. combines oil field actual production design data profile control agent injection rate, injection rate and other injection parameters；
Step 2. carries out sudden and violent oxygen processing to preparing water, prepares water and uses oilfield sewage or source water, is dissolved preparing in water
Oxygen content is reduced to below 3mg/L；
Under the conditions of 15-55 DEG C of step 3. temperature range, in the mixing container, medicament is added to preparing in water, is at the uniform velocity stirred
4-6 hours, obtain profile control agent；
Water injection well is connected by step 4. with stainless steel and supercharging device, starts supercharging device, profile control agent is injected into oil reservoir；
Static 18-24 hours make the abundant plastic of profile control agent after step 5. slug A profile control agent injection rates reach preset range；
Step 6. injects driven water-replacing 0.2PV, injects slug B profile control agents, then carries out follow-up note and adopts operation.
The specific injection rate of profile control agent is：Slug A profile control agent 0.3PV are injected first into oil reservoir or rock core, wait 18-24 small
When make the abundant plastic of slug A profile control agents, then in oil reservoir or rock core inject driven water-replacing 0.2PV, then in oil reservoir or rock core
Slug B profile control agent 0.2-0.3PV are injected, follow-up note is then carried out and adopts operation.
The present invention the advantage is that relative to prior art：
1st, in slug A, sodium metasilicate, partially hydrolyzed polyacrylamide (PHPA), aluminium citrate mixing can form spherical cross-linked structure, have
There are high viscoplasticity, high rheological variation feature, flowed through in oil reservoir adsorbable in duct inwall during macropore, duct in oil reservoir is implemented
Firm closure.
2nd, in slug A, calgon plays dispersant effect, can make sodium metasilicate, partially hydrolyzed polyacrylamide (PHPA) in water
More uniformly spread between molecules in solution, increase molecular coil periphery absorption affinity, so as to improve closure of the profile control agent in duct
Effect.
3rd, in slug A, the oxygen that sodium sulfite can suppress in process for preparation and in oil reservoir as oxygen scavenger produces to profile control agent
Viscosity reduction effect, so as to strengthen the stability of profile control agent.
4th, in slug B profile control agents, mix low molecule quality Complex polymer and methenamine forms profile control agent, possess low viscous
Degree, high stability feature, and appropriate clay stabilizer is added in profile control agent, clay swelling phenomenon in displacement process can be suppressed.
5th, appropriate surfactant is added in slug B profile control agents, wax, colloid, asphalitine can be improved near wellbore zone
The phenomenon of deposition, and the hydrophily of oil reservoir can be improved, reach the poly- purpose driven and improve recovery ratio.
6th, the present invention by double slugs inject form, improve hypotonic duct type Reservoir Heterogeneity, recovery percent of reserves it is low, water suction
Index is low and water injection pressure is big, increases sequent water flooding sweep efficiency, suppresses region of bypassed oil generation, to improve traditional oil production method to low
The drawbacks such as seepage hole channel type oil recovery is low, deficiency in economic performance.
Embodiment
Experimental method used in following embodiments is conventional method unless otherwise specified.
The partially hydrolyzed polyacrylamide (PHPA) used in following embodiments produces for Daqing Refinery company of CNPC, relative point
Protonatomic mass is 400*104、500*104、800*104、1000*104, effective mass fraction is 90%；Sodium metasilicate is the economic skill in Laiyang
The Fine Chemical Works production of art development zone, analysis are pure；Calgon produces for Shandong Ding Xin bio tech ltd, and 98%；
Sodium sulfite produces for Tianjin Zhi Yuan chemical reagent Co., Ltd, and analysis is pure；Salicylic acid is that Nanjing chemical reagent share is limited
Company produces, and analysis is pure；Aluminium citrate produces for Jinan Xin Ya Chemical Co., Ltd.s, top pure grade GR；Ammonium chloride is Nanjing chemistry
Reagent limited company produces, specification：ACS, 99.5%；DTAC is that Nanjing chemical reagent share has
Limit company produces, purity 98%；NPE produces for Jiangsu Hai'an Petrochemical Plant, No. CAS：9016-45-
9, purity 98%；Neopelex is the chemical limited company's production in the small open country in Shandong, and analysis is pure；Perfluoroalkyl beet
Alkali produces for Wuhan Sai Woer Chemical Co., Ltd.s, content：>=98%；Citric acid is given birth to for Nanjing chemical reagent limited company
Production, specification：AR, 99.5%；Resorcinol produces for Guangdong Weng Jiang chemical reagent Co., Ltd, and analysis is pure；Methenamine is north
Jing Pengcai chemical reagent Co., Ltd produces, and analysis is pure.
Profile control agent plugging effect is evaluated by laboratory core experimental method, it is specific as follows：
Embodiment one：
1st, profile control agent application method：(1) sudden and violent oxygen processing is carried out to preparing water first, will prepare content of oxygen dissolved in water reduces
To below 3mg/L；(2) under the conditions of 15 DEG C of temperature, medicament is added to preparing in water, at the uniform velocity stirs 4 hours, obtains profile control agent；(3)
Profile control agent is directly injected into rock core after the completion of preparation.
2nd, water is prepared, is 500mg/L by adding NaCl into distilled water and adjusting to salinity, to make in simulated production
Source water.
3rd, concrete medicament application amount is：
Slug A：Sodium metasilicate, partially hydrolyzed polyacrylamide (PHPA), calgon, sodium sulfite, salicylic acid, citric acid aluminum
Amount is than being 1.5%：0.1%：0.3%：0.5%：0.2%：0.2%, remaining components are preparation water.
Slug B：Complex polymer is made up of three kinds of different molecular mass fraction hydrolyzed polyacrylamides, molecular mass difference
For 500*104、800*104、1000*104, its mass ratio is 80：15：5；Complex polymer, DTAC,
Perfluoroalkyl betain, citric acid, resorcinol, salicylic acid, the mass ratio of methenamine are 0.075%：0.25%：
0.175%：0.15%：0.025%：0.025%：0.025%, remaining components are preparation water.
4th, specific rock core manufacture scale is as follows：
Experiment rock core is quartz sand epoxy resin cementitious homogeneous artificial core, and specific size is 4.5cm*4.5cm*
30cm, perm-plug method 20*10-3μm2, and the zink rod of 5% volume fraction is uniformly added into rock core manufacturing process, it is long
The high 0.05mm of the wide 0.1cm of 0.3cm, to simulate oil reservoir duct；Mould is carried out to hypotonic duct type oil reservoir by manually manufacturing rock core
Intend.
5th, displacement oil is crude oil, viscosity 45mPa.s in the case of 30 DEG C.
6th, sealing characteristics test operating procedure is as follows：
(1) rock core to be used is put into acidproof core holding unit, positive displacement, 30% concentration dilute sulfuric acid of displacement, until
Continue to inject dilute sulfuric acid 5PV, distilled water 5PV after producing without gas in rock core, to ensure that zink rod total overall reaction is discharged with dilute sulfuric acid,
Rock core is taken out after injection；
(2) rock core to be used is put into 70 DEG C of insulating boxs and is dried to constant weight, weighed its quality after taking out cooling, be designated as
m1；
(3) rock core after drying is put into saturation in vacuum pumping device and prepares water, when observation core surface bubble-free generates
Stop pumping, surface water is removed into rock core taking-up wiping, weighed, quality is designated as m2；
(4) rock core that saturation is configured to water is put into core holding unit, adds confined pressure 4MPa, then with 2mL/min speed
Into rock core, injection configuration water, records the pressure and flow when pressure stability；
(5) the positive injection slug A profile control agent 0.3PV into rock core, record pressure during injection profile agent, stand 24 hours
It is stand-by；
(6) water drive is carried out with 2mL/min speed, record outlet brings out the first breakthrough pressure when dripping, and treats that pressure is steady
The time recording pressure and flow；
(7) whole experiment is carried out in the case of 30 DEG C of constant temperature, is permeated after calculating original permeability according to record result, block up
Rate, sealing ratiod, breakthrough pressure gradient, resistance coefficient.
7th, sealing characteristics evaluation such as following table
Permeability is permeability after zink rod discharge before stifled, from the above in can draw, slug A profile control agents are to simulation core
Profile control effect is obvious, simulation duct formed firm closure, non-sealing region still has certain fluidity, illustrate the profile control agent and
Simulate source water to combine without negative effect, and seepage channel is left for follow-up slug B profile control agents.
8th, oil-displacement capacity test operating procedure is as follows：
(1) rock core to be used is put into acidproof core holding unit, positive displacement, 30% concentration dilute sulfuric acid of displacement, until
Continue to inject dilute sulfuric acid 5PV, distilled water 5PV after producing without gas in rock core, to ensure that zink rod total overall reaction is discharged with dilute sulfuric acid,
Rock core is taken out after injection；
(2) rock core to be used is put into 70 DEG C of insulating boxs and is dried to constant weight, weighed its quality after taking out cooling, be designated as
m3；
(3) rock core after drying is put into saturation in vacuum pumping device and configures water, when observation core surface bubble-free generates
Stop pumping, surface water is removed into rock core taking-up wiping, weighed, quality is designated as m4；
(4) with 1.5mL/min speed into rock core saturation crude oil, be driven to the port of export no longer water outlet when termination of pumping, record is tired
Count water yield, stand 4 hours it is stand-by；
(5) rock core of the complete crude oil of saturation being put into core holding unit, whole process experiment is carried out in the case of 30 DEG C of constant temperature, with
2mL/min speed carries out water drive oil, be driven to the port of export it is no longer fuel-displaced when termination of pumping, record oil pump capacity and recovery ratio；
(6) with the positive injection slug A profile control agent 0.3PV of 0.9mL/min speed, placed 18 hours after having noted, then note
Enter to prepare water 0.2PV, be subsequently injected into slug B profile control agent 0.2PV, termination of pumping；
(7) positive water drive experiment is carried out, stops experiment when being driven to aqueous 98%, records oil pump capacity, and it is final to calculate rock core
Recovery ratio value.
9th, oil-displacement capacity evaluation such as following table：
Learnt from above-mentioned data, prepare profile control agent using simulation source water, displacement is carried out in the case of 30 DEG C of oil reservoir is simulated
Experiment, after implementing profile control to simulation core, rock core anisotropism is improved, has improved recovery ratio 25.6%, illustrate profile control of the present invention
Agent can improve hypotonic duct type Reservoir Heterogeneity, and profile control effect is obvious.
Embodiment two：
1st, profile control agent application method：(1) sudden and violent oxygen processing is carried out to preparing water first, will prepare content of oxygen dissolved in water reduces
To below 3mg/L；(2) under the conditions of 35 DEG C of temperature, medicament is added to preparing in water, at the uniform velocity stirs 5 hours, obtains profile control agent；(3)
Profile control agent is directly injected into rock core after the completion of preparation.
2nd, water is prepared, is 8000mg/L by adding NaCl into distilled water and adjusting to salinity, to simulate actual life
The oilfield sewage used in production.
3rd, concrete medicament application amount is：
Slug A：Sodium metasilicate, partially hydrolyzed polyacrylamide (PHPA), calgon, sodium sulfite, salicylic acid, citric acid aluminum
Amount is than being 1%：0.05%：0.2%：0.4%：0.1%：0.15%, remaining components are preparation water.
Slug B：Complex polymer is made up of three kinds of different molecular mass fraction hydrolyzed polyacrylamides, molecular mass difference
For 500*104、800*104、1000*104, its mass ratio is 80：15：5；Complex polymer, ammonium chloride, DBSA
Sodium, citric acid, resorcinol, salicylic acid, the mass ratio of methenamine are 0.05%：0.2%：0.1%：0.1%：0.02%：
0.02%：0.02%, remaining components are preparation water.
4th, specific rock core manufacture scale is as follows：
Experiment rock core is quartz sand epoxy resin cementitious homogeneous artificial core, and specific size is 4.5cm*4.5cm*
30cm, perm-plug method 20*10-3μm2, and the zink rod of 5% volume fraction is uniformly added into rock core manufacturing process, it is long
The high 0.05mm of the wide 0.1cm of 0.3cm, to simulate oil reservoir duct；Mould is carried out to hypotonic duct type oil reservoir by manually manufacturing rock core
Intend.
5th, displacement oil is crude oil, viscosity 55mPa.s in the case of 50 DEG C.
6th, sealing characteristics test operating procedure is as follows：
(1) rock core to be used is put into acidproof core holding unit, positive displacement, 30% concentration dilute sulfuric acid of displacement, until
Continue to inject dilute sulfuric acid 5PV, distilled water 5PV after producing without gas in rock core, to ensure that zink rod total overall reaction is discharged with dilute sulfuric acid,
Rock core is taken out after injection；
(2) rock core to be used is put into 70 DEG C of insulating boxs and is dried to constant weight, weighed its quality after taking out cooling, be designated as
m5；
(3) rock core after drying is put into saturation in vacuum pumping device and prepares water, when observation core surface bubble-free generates
Stop pumping, surface water is removed into rock core taking-up wiping, weighed, quality is designated as m6；
(4) rock core that saturation is configured to water is put into core holding unit, adds confined pressure 4MPa, then with 2mL/min speed
Into rock core, injection configuration water, records the pressure and flow when pressure stability；
(5) the positive injection slug A profile control agent 0.3PV into rock core, record pressure during injection profile agent, stand 18 hours
It is stand-by；
(6) water drive is carried out with 2mL/min speed, record outlet brings out the first breakthrough pressure when dripping, and treats that pressure is steady
The time recording pressure and flow；
(7) whole experiment is carried out in the case of 50 DEG C of constant temperature, is permeated after calculating original permeability according to record result, block up
Rate, sealing ratiod, breakthrough pressure gradient, resistance coefficient.
7th, sealing characteristics evaluation such as following table
Permeability is permeability after zink rod discharge before stifled, from the above in can draw, slug A profile control agents are to simulation core
Profile control effect is obvious, simulation duct formed firm closure, non-sealing region still has certain fluidity, illustrate the profile control agent and
Simulating oil field produced water is combined without negative effect, and leaves seepage channel for follow-up slug B profile control agents.
8th, oil-displacement capacity test operating procedure is as follows：
(1) rock core to be used is put into acidproof core holding unit, positive displacement, 30% concentration dilute sulfuric acid of displacement, until
Continue to inject dilute sulfuric acid 5PV, distilled water 5PV after producing without gas in rock core, to ensure that zink rod total overall reaction is discharged with dilute sulfuric acid,
Rock core is taken out after injection；
(2) rock core to be used is put into 70 DEG C of insulating boxs and is dried to constant weight, weighed its quality after taking out cooling, be designated as
m7；
(3) rock core after drying is put into saturation in vacuum pumping device and configures water, when observation core surface bubble-free generates
Stop pumping, surface water is removed into rock core taking-up wiping, weighed, quality is designated as m8；
(4) with 1.5mL/min speed into rock core saturation crude oil, be driven to the port of export no longer water outlet when termination of pumping, record is tired
Count water yield, stand 4 hours it is stand-by；
(5) rock core of the complete crude oil of saturation being put into core holding unit, whole process experiment is carried out in the case of 50 DEG C of constant temperature, with
2mL/min speed carries out water drive oil, be driven to the port of export it is no longer fuel-displaced when termination of pumping, record oil pump capacity and recovery ratio；
(6) with the positive injection slug A profile control agent 0.3PV of 0.9mL/min speed, placed 20 hours after having noted, then note
Enter to prepare water 0.2PV, be subsequently injected into slug B profile control agent 0.25PV, termination of pumping；
(7) positive water drive experiment is carried out, stops experiment when being driven to aqueous 98%, records oil pump capacity, and it is final to calculate rock core
Recovery ratio value.
9th, oil-displacement capacity evaluation such as following table：
Learnt from above-mentioned data, prepare profile control agent using simulating oil field produced water, driven in the case of 50 DEG C of oil reservoir is simulated
For experiment, after implementing profile control to simulation core, improve rock core anisotropism, improved recovery ratio 25.6%, illustrate present invention tune
Hypotonic duct type Reservoir Heterogeneity can be improved by cuing open agent, and profile control effect is obvious.
Embodiment three：
1st, profile control agent application method：(1) sudden and violent oxygen processing is carried out to preparing water first, will prepare content of oxygen dissolved in water reduces
To below 3mg/L；(2) under the conditions of 55 DEG C of temperature, medicament is added to preparing in water, at the uniform velocity stirs 6 hours, obtains profile control agent；(3)
Profile control agent is directly injected into rock core after the completion of preparation.
2nd, water is prepared, by adding solubility salt regulating mineralization degree of injected oil into distilled water, final salinity is 35000mg/
L, to simulate the oilfield sewage used in actual production.
3rd, concrete medicament application amount is：
Slug A：Sodium metasilicate, partially hydrolyzed polyacrylamide (PHPA), calgon, sodium sulfite, salicylic acid, citric acid aluminum
Amount is than being 2%：0.15%：0.4%：0.6%：0.3%：0.25%, remaining components are preparation water.
Slug B：Complex polymer is made up of three kinds of different molecular mass fraction hydrolyzed polyacrylamides, molecular mass difference
For 500*104、800*104、1000*104, its mass ratio is 80：15：5；Complex polymer, ammonium chloride, Nonyl pheno
Ether, citric acid, resorcinol, salicylic acid, the mass ratio of methenamine are 0.1%：0.3%：0.3%：0.2%：0.03%：
0.03%：0.03%, remaining components are preparation water.
4th, specific rock core manufacture scale is as follows：
Experiment rock core is quartz sand epoxy resin cementitious homogeneous artificial core, and specific size is 4.5cm*4.5cm*
30cm, perm-plug method 20*10-3μm2, and the zink rod of 5% volume fraction is uniformly added into rock core manufacturing process, it is long
The high 0.05mm of the wide 0.1cm of 0.3cm, to simulate oil reservoir duct；Mould is carried out to hypotonic duct type oil reservoir by manually manufacturing rock core
Intend.
5th, displacement oil is crude oil, viscosity 37mPa.s in the case of 70 DEG C.
6th, sealing characteristics test operating procedure is as follows：
(1) rock core to be used is put into acidproof core holding unit, positive displacement, 30% concentration dilute sulfuric acid of displacement, until
Continue to inject dilute sulfuric acid 5PV, distilled water 5PV after producing without gas in rock core, to ensure that zink rod total overall reaction is discharged with dilute sulfuric acid,
Rock core is taken out after injection；
(2) rock core to be used is put into 70 DEG C of insulating boxs and is dried to constant weight, weighed its quality after taking out cooling, be designated as
m9；
(3) rock core after drying is put into saturation in vacuum pumping device and prepares water, when observation core surface bubble-free generates
Stop pumping, surface water is removed into rock core taking-up wiping, weighed, quality is designated as m10；
(4) rock core that saturation is configured to water is put into core holding unit, adds confined pressure 4MPa, then with 2mL/min speed
Into rock core, injection configuration water, records the pressure and flow when pressure stability；
(5) the positive injection slug A profile control agent 0.3PV into rock core, record pressure during injection profile agent, stand 24 hours
It is stand-by；
(6) water drive is carried out with 2mL/min speed, record outlet brings out the first breakthrough pressure when dripping, and treats that pressure is steady
The time recording pressure and flow；
(7) whole experiment is carried out in the case of 70 DEG C of constant temperature, is permeated after calculating original permeability according to record result, block up
Rate, sealing ratiod, breakthrough pressure gradient, resistance coefficient.
7th, sealing characteristics evaluation such as following table
Permeability is permeability after zink rod discharge before stifled, from the above in can draw, slug A profile control agents are to simulation core
Profile control effect is obvious, simulation duct formed firm closure, non-sealing region still has certain fluidity, illustrate the profile control agent and
Simulating oil field produced water is combined without negative effect, and leaves seepage channel for follow-up slug B profile control agents.
8th, oil-displacement capacity test operating procedure is as follows：
(1) rock core to be used is put into acidproof core holding unit, positive displacement, 30% concentration dilute sulfuric acid of displacement, until
Continue to inject dilute sulfuric acid 5PV, distilled water 5PV after producing without gas in rock core, to ensure that zink rod total overall reaction is discharged with dilute sulfuric acid,
Rock core is taken out after injection；
(2) rock core to be used is put into 70 DEG C of insulating boxs and is dried to constant weight, weighed its quality after taking out cooling, be designated as
m11；
(3) rock core after drying is put into saturation in vacuum pumping device and configures water, when observation core surface bubble-free generates
Stop pumping, surface water is removed into rock core taking-up wiping, weighed, quality is designated as m12；
(4) with 1.5mL/min speed into rock core saturation crude oil, be driven to the port of export no longer water outlet when termination of pumping, record is tired
Count water yield, stand 4 hours it is stand-by；
(5) rock core of the complete crude oil of saturation being put into core holding unit, whole process experiment is carried out in the case of 70 DEG C of constant temperature, with
2mL/min speed carries out water drive oil, be driven to the port of export it is no longer fuel-displaced when termination of pumping, record oil pump capacity and recovery ratio；
(6) with the positive injection slug A profile control agent 0.3PV of 0.9mL/min speed, placed 24 hours after having noted, then note
Enter to prepare water 0.2PV, be subsequently injected into slug B profile control agent 0.3PV, termination of pumping；
(7) positive water drive experiment is carried out, stops experiment when being driven to aqueous 98%, records oil pump capacity, and it is final to calculate rock core
Recovery ratio value.
9th, oil-displacement capacity evaluation such as following table：
Learnt from above-mentioned data, prepare profile control agent using simulating oil field produced water, driven in the case of 70 DEG C of oil reservoir is simulated
For experiment, after implementing profile control to simulation core, improve rock core anisotropism, improved recovery ratio 24.51%, illustrate present invention tune
Hypotonic duct type Reservoir Heterogeneity can be improved by cuing open agent, and profile control effect is obvious.
Claims (8)
1. the double slug profile control agents of a kind of hypotonic duct type oil deposit deep part, it is characterised in that adjusted including slug A profile control agents and slug B
Cut open agent；
Slug A profile control agents include sodium metasilicate, partially hydrolyzed polyacrylamide (PHPA), calgon, sodium sulfite, salicylic acid, lemon
Sour aluminium；Wherein polyacrylamide molecular mass is 400*104；In slug A profile control agents, sodium metasilicate mass ratio is 1%-2%, part
Hydrolyzed polyacrylamide mass ratio is 0.05%-0.15%, and calgon mass ratio is 0.2%-0.4%, sodium sulfite matter
It is 0.4%-0.6% to measure ratio, and salicylic acid mass ratio is 0.1%-0.3%, and aluminium citrate mass ratio is 0.15%-0.25%, remaining
The following group is divided into preparation water；And
Slug B profile control agents include Complex polymer and additive；Wherein, Complex polymer is by three kinds of different molecular mass fraction water
Polyacrylamide composition is solved, molecular mass is respectively 500*104、800*104、1000*104, its mass ratio is 80：15：5；Addition
Agent includes clay stabilizer, surfactant, citric acid, resorcinol, salicylic acid, methenamine；It is multiple in slug B profile control agents
It is 0.05%-0.1% with polymer quality ratio, clay stabilizer mass ratio is 0.2%-0.3%, and surfactant qualities ratio is
0.1%-0.3%, citric acid mass ratio are 0.1%-0.2%, and resorcinol mass ratio is 0.02%-0.03%, salicylic acid matter
It is 0.02%-0.03% to measure ratio, and methenamine mass ratio is 0.02%-0.03%, and remaining components are preparation water.
A kind of 2. double slug profile control agents of hypotonic duct type oil deposit deep part as claimed in claim 1, it is characterised in that the clay
Stabilizer includes ammonium chloride, DTAC and other clays for being applied to hypotonic duct type oil reservoir and stablized
Agent.
A kind of 3. double slug profile control agents of hypotonic duct type oil deposit deep part as claimed in claim 1, it is characterised in that the surface
Activating agent includes NPE, neopelex or perfluoroalkyl betain.
A kind of 4. double slug profile control agents of hypotonic duct type oil deposit deep part as claimed in claim 1, it is characterised in that the slug
Sodium metasilicate, partially hydrolyzed polyacrylamide (PHPA), calgon, sodium sulfite, salicylic acid, aluminium citrate mass ratio in A profile control agents
For 1.2%-1.8%：0.08%-0.12%：0.25%-0.35%：0.45%-0.55%：0.15%-0.25%：0.18%-
0.22%, remaining components are preparation water.
A kind of 5. double slug profile control agents of hypotonic duct type oil deposit deep part as claimed in claim 1, it is characterised in that the slug
Sodium metasilicate, partially hydrolyzed polyacrylamide (PHPA), calgon, sodium sulfite, salicylic acid, aluminium citrate mass ratio in A profile control agents
For 1.5%：0.1%：0.3%：0.5%：0.2%：0.2%, remaining components are preparation water.
A kind of 6. double slug profile control agents of hypotonic duct type oil deposit deep part as claimed in claim 1, it is characterised in that the slug
Complex polymer, clay stabilizer, surfactant, citric acid, resorcinol, salicylic acid, the matter of methenamine in B profile control agents
It is 0.06%-0.09% to measure ratio：0.22%-0.28%：0.15%-0.2%：0.12%-0.18%：0.022%-0.028%：
0.022%-0.028%：0.022%-0.028%, remaining components are preparation water.
A kind of 7. double slug profile control agents of hypotonic duct type oil deposit deep part as claimed in claim 1, it is characterised in that the slug
Complex polymer, clay stabilizer, surfactant, citric acid, resorcinol, salicylic acid, the matter of methenamine in B profile control agents
Amount is than being 0.075%：0.25%：0.175%：0.15%：0.025%：0.025%：0.025%, remaining components are preparation water.
8. the application method of the double slug profile control agents of a kind of hypotonic duct type oil deposit deep part, it is characterised in that comprise the following steps：
Step 1. combines oil field actual production design data profile control agent injection rate, injection rate and other injection parameters；
Step 2. carries out sudden and violent oxygen processing to preparing water, prepares water and uses oilfield sewage or source water, will prepare oxygen in water and contains
Amount is reduced to below 3mg/L；
Under the conditions of 15-55 DEG C of step 3. temperature range, in the mixing container, medicament is added to preparing in water, it is small at the uniform velocity to stir 4-6
When, obtain profile control agent；
Water injection well is connected by step 4. with stainless steel and supercharging device, starts supercharging device, profile control agent is injected into oil reservoir；
Static 18-24 hours make the abundant plastic of profile control agent after step 5. slug A profile control agent injection rates reach preset range；
Step 6. injects driven water-replacing 0.2PV, injects slug B profile control agents, then carries out follow-up note and adopts operation.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108071361A (en) * | 2017-12-29 | 2018-05-25 | 长江大学 | A kind of device and its plugging effect evaluation method being used for the closure of shale microcrack |
| CN108130063A (en) * | 2017-12-30 | 2018-06-08 | 周益铭 | A kind of preparation method of water plugging profile control agent |
| CN112368356A (en) * | 2018-06-29 | 2021-02-12 | 陶氏环球技术有限责任公司 | Additive for enhancing extraction of asphalt |
-
2017
- 2017-08-06 CN CN201710663786.9A patent/CN107384349A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108071361A (en) * | 2017-12-29 | 2018-05-25 | 长江大学 | A kind of device and its plugging effect evaluation method being used for the closure of shale microcrack |
| CN108071361B (en) * | 2017-12-29 | 2020-02-07 | 长江大学 | Device for plugging shale microcracks and plugging effect evaluation method thereof |
| CN108130063A (en) * | 2017-12-30 | 2018-06-08 | 周益铭 | A kind of preparation method of water plugging profile control agent |
| CN112368356A (en) * | 2018-06-29 | 2021-02-12 | 陶氏环球技术有限责任公司 | Additive for enhancing extraction of asphalt |
| US11834607B2 (en) | 2018-06-29 | 2023-12-05 | Dow Global Technologies Llc | Additives for enhanced extraction of bitumen |
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Application publication date: 20171124 |