CN107384345A - A kind of double slug type profile control agents of compact oil reservoir and its application method - Google Patents
A kind of double slug type profile control agents of compact oil reservoir and its application method Download PDFInfo
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- CN107384345A CN107384345A CN201710662138.1A CN201710662138A CN107384345A CN 107384345 A CN107384345 A CN 107384345A CN 201710662138 A CN201710662138 A CN 201710662138A CN 107384345 A CN107384345 A CN 107384345A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 102
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 84
- 238000002347 injection Methods 0.000 claims abstract description 36
- 239000007924 injection Substances 0.000 claims abstract description 36
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229920000642 polymer Polymers 0.000 claims abstract description 17
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 235000010299 hexamethylene tetramine Nutrition 0.000 claims abstract description 15
- 229960004011 methenamine Drugs 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 6
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 28
- 238000002360 preparation method Methods 0.000 claims description 20
- 238000004519 manufacturing process Methods 0.000 claims description 17
- 235000010265 sodium sulphite Nutrition 0.000 claims description 14
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 13
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- 239000001301 oxygen Substances 0.000 claims description 12
- 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 description 12
- 239000003814 drug Substances 0.000 claims description 8
- 238000013461 design Methods 0.000 claims description 5
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- 238000003756 stirring Methods 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 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
- 125000005211 alkyl trimethyl ammonium group Chemical group 0.000 claims 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims 1
- 230000031709 bromination Effects 0.000 claims 1
- 238000005893 bromination reaction Methods 0.000 claims 1
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 claims 1
- 125000000913 palmityl 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])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims 1
- 238000011084 recovery Methods 0.000 abstract description 19
- 239000004094 surface-active agent Substances 0.000 abstract description 14
- 150000001875 compounds Chemical class 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 3
- 241000237858 Gastropoda Species 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 99
- 239000011435 rock Substances 0.000 description 87
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 42
- 238000006073 displacement reaction Methods 0.000 description 25
- 238000005086 pumping Methods 0.000 description 21
- 238000002474 experimental method Methods 0.000 description 20
- 230000000694 effects Effects 0.000 description 16
- 230000035699 permeability Effects 0.000 description 14
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 9
- 239000010779 crude oil Substances 0.000 description 9
- 239000012153 distilled water Substances 0.000 description 9
- 238000007789 sealing Methods 0.000 description 9
- 238000011156 evaluation Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 238000011161 development Methods 0.000 description 6
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- 239000002352 surface water Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 5
- 238000004088 simulation Methods 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 239000006004 Quartz sand Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
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- 229920000647 polyepoxide Polymers 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 229940123973 Oxygen scavenger Drugs 0.000 description 2
- 239000003945 anionic surfactant Substances 0.000 description 2
- 239000003093 cationic surfactant Substances 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
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- 239000004576 sand Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- -1 sodium sulfonate compound Chemical class 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- XQJMXPAEFMWDOZ-UHFFFAOYSA-N 3exo-benzoyloxy-tropane Natural products CN1C(C2)CCC1CC2OC(=O)C1=CC=CC=C1 XQJMXPAEFMWDOZ-UHFFFAOYSA-N 0.000 description 1
- MOMKYJPSVWEWPM-UHFFFAOYSA-N 4-(chloromethyl)-2-(4-methylphenyl)-1,3-thiazole Chemical compound C1=CC(C)=CC=C1C1=NC(CCl)=CS1 MOMKYJPSVWEWPM-UHFFFAOYSA-N 0.000 description 1
- 241000167854 Bourreria succulenta Species 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 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
- 235000019738 Limestone Nutrition 0.000 description 1
- QQXLDOJGLXJCSE-UHFFFAOYSA-N N-methylnortropinone Natural products C1C(=O)CC2CCC1N2C QQXLDOJGLXJCSE-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- QIZDQFOVGFDBKW-DHBOJHSNSA-N Pseudotropine Natural products OC1C[C@@H]2[N+](C)[C@H](C1)CC2 QIZDQFOVGFDBKW-DHBOJHSNSA-N 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
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000010430 carbonatite Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
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- 238000000280 densification Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000015784 hyperosmotic salinity response Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000000693 micelle Substances 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 235000019983 sodium metaphosphate Nutrition 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000031068 symbiosis, encompassing mutualism through parasitism Effects 0.000 description 1
- CYHOMWAPJJPNMW-JIGDXULJSA-N tropine Chemical compound C1[C@@H](O)C[C@H]2CC[C@@H]1N2C CYHOMWAPJJPNMW-JIGDXULJSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 230000010148 water-pollination Effects 0.000 description 1
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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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- 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
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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
-
- 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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- Oil, Petroleum & Natural Gas (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
A kind of double slug type profile control agents of compact oil reservoir and its application method, are related to field use chemical field.Profile control agent of the present invention is injected in compact oil reservoir in the form of double slugs, preposed attributives mixing low molecule quality Complex polymer forms profile control agent with resorcinol and methenamine, with low viscosity, mobility is strong, shear resistant feature, can low-pressure injection oil reservoir its Fracture System is implemented to block；Rearmounted slug is compound surfactant, injects oil reservoir after preposed attributives effectively block, and surfactant flooding is carried out to the duct without closure, to reduce residual oil content in oil reservoir, increase oil reservoir injectivity index；The present invention increases sequent water flooding sweep efficiency, to improve compact oil reservoir economic benefit by the way that double Segment combination models improve compact oil reservoir anisotropism, recovery percent of reserves is low, injectivity index is low, water injection pressure is big.
Description
Technical field
The present invention relates to a kind of double slug type profile control agents of compact oil reservoir and its application method, the profile control agent can improve reservoir and fit
Ying Xing, and then compact oil reservoir oil recovery can be improved, belong to field use chemical agent field.
Background technology
Compact oil reservoir refer to Source Beds symbiosis or close to the continuously distributed petroleum resources of large area, reservoir lithology
Mainly include tight sand, compact limestone and carbonate rock, cover pressure matrix permeability and be less than 0.1mD, individual well is without industry production naturally
Can, fine and close oil refers to be clipped in or close in the compact reservoir of high-quality oil-generative assemblage, formed without extensive long-distance migration
Oil accumulation, be a kind of non-conventional oil resource, there is the characteristics of reservoir low porosity and low permeability；The special hypotonic, Oil in Super-low Permeability developed in the past
Oil reservoir is compared, and its reservoiring mechanism is more complicated, pore throat is trickleer, chink content is higher, difficulties in exploration is bigger.
The fine and close main preservation space of oil is divided into two types, and one kind is in carbonatite or clastic rock interlayer inside source rock,
Another kind of is close in the compacted zone of source rock.Since the 1960s, China loose the Liao Dynasty, Bohai Sea Gulf, Qaidam, tell Kazakhstan,
Wine west, Jiang-Han Area, south are assisted, northern Suzhou and the Sichuan Basin are found that fine and close oily resource, and exploration prospect is very wide；According to Ministry of Land and Resources
Oil and gas resource evaluation shows that in the recoverable oil resource in China, fine and close oil accounts for 2/5；The densification oil exploitation in China achieves war
Slightly property breaks through, and finds 500,000,000 tonnes to 1,000,000,000 tonnes reserves scale areas in Ordos Basin and the Junggar Basin etc. in succession, tentatively
It is expected that national geological resources are more than 20,000,000,000 tons.
For a large amount of actual recoverys percent of reserves of compact oil reservoir 9%~13%, recovery percent of reserves is relatively low, shows that water drive is applied to fine and close oil
Hide less efficient；Compact oil reservoir is because fractue spacing is complicated, and Fracture System is developed to compact oil reservoir during actual development
Influence has multiplicity：
(1) compact oil reservoir percolation ability is poor, only relies on the percolation ability of Rock Matrix, seepage discharge very little, many fine and close sand
Rock reservoir can not form commercial oil at all.And the presence in crack changes the flow direction of formation fluid, seepage section is increased,
Also increase the flow differential pressure in matrix.
(2) Fracture System, especially diaclase exacerbate the anisotropism of compact oil reservoir.In the process of waterflooding extraction
In, the injection water capacity is easily advanced by leaps and bounds forward along Fracture System, thus it is quick along the oil well of fractuer direction, but moisture content rises also very
It hurry up, easily form water breakthrough, or even cause sudden water flooding, reduce reserves utilization rate, increase oil field development difficulty.
(3) pressure sensibility in compact oil reservoir crack is fairly obvious, and in free from flaw, matrix sillar is moderate sensitivity
Property, when containing crack is strong pressure sensitiveness.And the aperture in crack is bigger, permeability is higher, and its pressure sensibility is stronger, infiltration
The recovery extent of rate is smaller, and as effective pressure increases, the permeability in crack is successively decreased in negative exponential function, influences compact oil reservoir
Development effectiveness.
(4) development degree in crack influences the injectivity index of oil reservoir, and each position of influence of sedimentary micro and fault tectonic is split
The development degree of seam is inconsistent so that the injection index of oil reservoir is also different.It is additionally, since in oil reservoir high angle diaclase and low
Angle slips crack and developed with diagenetic fracture, and in water filling, crack water absorbing capacity becomes strong, causes oil reservoir injectivity index to decline.
(5) region of bypassed oil branch is more, during conventional water drive, because most of displacing fluid flows through Fracture System, result in
Intake profile branch is uneven, and affected area does not gradually form region of bypassed oil to displacing fluid, has a strong impact on compact oil reservoir development effectiveness.
Recovery efficiency technique demand and above mentioned problem are improved for compact oil reservoir, the present invention designs a kind of double slug type profile controls
Agent, overcome it is above-mentioned during water drive the drawbacks of.
The content of the invention
It is an object of the invention to provide a kind of double slug type profile control agents of compact oil reservoir and its application method, its feature to exist
In, injected by double slug forms in compact oil reservoir, preposed attributives mixing low molecule quality Complex polymer and resorcinol and
Methenamine forms profile control agent, has that low viscosity, mobility be strong, shear resistant feature, can low-pressure inject oil reservoir to its crack
System implements closure；Rearmounted slug is compound surfactant, injects oil reservoir after preposed attributives effectively block, to without closure
Duct carry out surfactant flooding, with reduce residual oil content in oil reservoir, increase oil reservoir injectivity index；The present invention passes through double sections
Fill in combination improvement compact oil reservoir anisotropism, recovery percent of reserves is low, injectivity index is low, water injection pressure is big, increase sequent water flooding
Sweep efficiency, to improve compact oil reservoir economic benefit.
To reach above-mentioned purpose, the present invention adopts the following technical scheme that.
It is an object of the invention to provide a kind of double slug type profile control agents of compact oil reservoir and its application method, its main component
For：Partially hydrolyzed polyacrylamide (PHPA) relative molecular weight is respectively 400*104、600*104, resorcinol, methenamine, six inclined phosphorus
Sour sodium, sodium sulfite, cetyl trimethylammonium bromide, dodecyl sodium sulfate；For compact oil reservoir, design double slug formulas and adjust
Agent is cutd open, is described below with slug A profile control agents and slug B.
Slug A profile control agents include Complex polymer and additive；Wherein, Complex polymer is by two kinds of different molecular quality
Partially hydrolyzed polyacrylamide (PHPA) forms, and molecular mass is respectively 400*104、600*104, its mass ratio is 85：15；Additive bag
Include resorcinol, methenamine, calgon, sodium sulfite；In slug A profile control agents, Complex polymer mass ratio is
0.01%-0.02%, resorcinol mass ratio are 0.01%-0.02%, and methenamine mass ratio is 0.01%-0.02%, six
Sodium metaphosphate mass ratio is 0.03%-0.07%, and sodium sulfite mass ratio is 0.2%-0.4%, and remaining components are preparation water.
Preferably, in slug A profile control agents, Complex polymer, resorcinol, methenamine, calgon, sodium sulfite
Mass ratio is 0.012%-0.018%：0.012%-0.018%：0.012%-0.018%：0.04%-0.06%：0.25%-
0.35%, remaining components are preparation water.
It is highly preferred that in slug A profile control agents, Complex polymer, resorcinol, methenamine, calgon, sulfurous acid
Sodium mass ratio is 0.015%：0.014%：0.015%：0.05%：0.3%, remaining components are preparation water.
Slug A profile control agent main function mechanism is, by mixing low molecule quality Complex polymer and resorcinol and crow
Lip river tropine, the profile control agent with matrix type cross-linked structure is formed, when there is strong low viscosity, mobility, colloid physical property stabilization, broken glue
Between the effect such as long, salt tolerance, firm closure can be implemented to the microcrack in compact oil reservoir；Calgon plays dispersant work
With can make polymeric system is intermolecular to more uniformly spread, increase molecular coil periphery absorption affinity, caused so as to improve profile control agent
Plugging effect in close oil reservoir；Sodium sulfite can effectively suppress oxygen in process for preparation and in oil reservoir to profile control agent as oxygen scavenger
Caused viscosity reduction effect, increase the stability of profile control agent；Slug A is mainly used as blocking the microcrack in compact oil reservoir, improves and causes
The anisotropism of close oil reservoir so that follow-up slug B, which can enter in the duct without closure, carries out surfactant flooding, so as to be formed
Double slug synergies.
Slug B includes cetyl trimethylammonium bromide and dodecyl sodium sulfate；In slug B, cetyl trimethyl
Ammonium bromide mass ratio is 0.5%-1%, and dodecyl sodium sulfate mass ratio is 2%-2.5%, and remaining components are preparation water.
Preferably, in slug B, cetyl trimethylammonium bromide, dodecyl sodium sulfate mass ratio are 0.7%-
0.9%：2.1%-2.3%, remaining components are preparation water.
It is highly preferred that in slug B, cetyl trimethylammonium bromide, dodecyl sodium sulfate mass ratio are 0.8%：
2.2%, remaining components are preparation water.
Slug B main function mechanism is to pass through cationic surfactant cetyl trimethylammonium bromide and anion
Surfactant sodium dodecyl base sodium sulfonate compound synergic, male-female ionic surface active agent produce strong electrical function when compounding,
Surface-active thus is greatly improved, the efficiency for reducing surface tension, the efficiency for reducing surface tension is played, reduces critical micell
The effects such as concentration, enhancing adsorption；Compound surfactant solution has relatively low surface and interface tension force, therefore compound ligand
System can improve with stronger wettability rock hydrophily, reach washing oil purpose indirectly, be contained with reducing remaining oil in oil reservoir
Amount, increase oil reservoir injectivity index；Two kinds of surfactant compounds, can increase its saline-alkaline tolerance, can adapt to different type
Configuration water, stratum water；And two kinds of surfactant compound application effects are better than single surfactant；Slug A formed with
After effect closure, slug B is injected into oil reservoir, can enter in the duct without closure and carry out surfactant flooding, with reducing nearly well
Band residual oil blocks to caused by oil reservoir, strengthens its flow conductivity；Slug A after breaking gel, through slug surfactant B drive caused by
Passage has certain flow conductivity, and oil reservoir has been improved before comparing profile control, and oil reservoir is entered by sequent water flooding
Row further exploitation.
The application method of the double slug type profile control agents of a kind of compact oil reservoir, 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 30-55 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 48-72 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 0.15PV, 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 0.1PV are injected first into oil reservoir or rock core, wait 48-72 small
When make the abundant plastic of slug A profile control agents, then in oil reservoir or rock core inject driven water-replacing 0.15PV, slug B0.2-0.3PV, with
Follow-up note is carried out afterwards adopts operation.
The present invention the advantage is that relative to prior art：
1st, recovery efficiency technique demand is improved for compact oil reservoir, the present invention designs a kind of double slug type profile controls of compact oil reservoir
Agent, it is characterised in that slug A profile control agents, mixing low molecule quality Complex polymer are formed with resorcinol and methenamine and adjusted
Cut open agent, have that low viscosity, mobility be strong, shear resistant feature, can low-pressure injection oil reservoir its Fracture System is implemented to block.
2nd, in slug A, sodium sulfite can effectively suppress in process for preparation with the oxygen in oil reservoir to profile control agent as oxygen scavenger
Caused viscosity reduction effect, strengthen the stability of profile control agent.
3rd, in slug B, cationic surfactant cetyl trimethylammonium bromide and anion surfactant are passed through
Dodecyl sodium sulfate compound synergic, male-female ionic surface active agent produces strong electrical function when compounding, thus makes surface
Activity greatly improves, and plays the efficiency for reducing surface tension, the efficiency for reducing surface tension, reduces critical micelle concentration, enhancing
Adsorption etc. acts on, and its application effect is better than single surfactant.
4th, the present invention injects form by double slugs, improves compact oil reservoir anisotropism, recovery percent of reserves is low, injectivity index is low
And water injection pressure is big, increase sequent water flooding sweep efficiency, suppress region of bypassed oil generation, to improve traditional oil production method to compact oil reservoir
The drawbacks such as recovery ratio 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、600*104, effective mass fraction is 90%；Resorcinol is Guangdong Weng Jiang chemical reagent Co., Ltd
Production, analysis are pure；Methenamine produces for Beijing Peng Cai chemical reagent Co., Ltd, and analysis is pure；Calgon is Shandong ancient cooking vessel
Glad bio tech ltd's production, 98%；Sodium sulfite produces for Tianjin Zhi Yuan chemical reagent Co., Ltd, and analysis is pure；
Cetyl trimethylammonium bromide produces for Nanjing chemical reagent limited company, analyzes pure AR；Dodecyl sodium sulfate is
Nanjing chemical reagent limited company produces, and analyzes pure AR.
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 30 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, is produced to simulation oil field
The middle source water used.
3rd, concrete medicament application amount is：
Slug A：Complex polymer, resorcinol, methenamine, calgon, sodium sulfite mass ratio are
0.015%：0.014%：0.015%：0.05%：0.3%, remaining components are preparation water.
Slug B：Cetyl trimethylammonium bromide, dodecyl sodium sulfate mass ratio are 0.8%：2.2%, remaining components
To prepare 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 0.1*10-3μm2, and the zink rod of 3% volume fraction is uniformly added into rock core manufacturing process, it is long
The high 0.05mm of the wide 0.2cm of 0.5cm, to simulate oil reservoir microcrack；Compact oil reservoir is simulated by manually manufacturing rock core.
5th, displacement oil is crude oil, viscosity 17mPa.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 0.2mL/min speed
The injection configuration water into rock core is spent, the pressure and flow are recorded when pressure stability；
(5) the positive injection slug A profile control agent 0.1PV into rock core, record pressure during injection profile agent, stand 48 hours
It is stand-by；
(6) water drive is carried out with 1mL/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 total overall reaction is discharged with dilute sulfuric acid in rock core before stifled, from the above in can obtain
Go out, slug A profile control agents have weak seal-off effect to rock core, and profile control agent is moveable in rock core, is left to be subsequently implanted into slug B
Displacement passage.
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 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 m4；
(4) with 1mL/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 accumulative
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 0.1PV of 0.9mL/min speed, placed 48 hours after having noted, then note
Enter to prepare water 0.15PV, be subsequently injected into slug B0.2PV, 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, its Fracture System is improved, has improved recovery ratio 26.02%, illustrate profile control agent of the present invention
Compact oil reservoir anisotropism can be improved, 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 temperature 45 C, 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：Complex polymer, resorcinol, methenamine, calgon, sodium sulfite mass ratio are 0.01%：
0.01%：0.01%：0.03%：0.2%, remaining components are preparation water.
Slug B：Cetyl trimethylammonium bromide, dodecyl sodium sulfate mass ratio are 0.5%：2%, remaining components are
Prepare 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 0.1*10-3μm2, and the zink rod of 3% volume fraction is uniformly added into rock core manufacturing process, it is long
The high 0.05mm of the wide 0.2cm of 0.5cm, to simulate oil reservoir microcrack；Compact oil reservoir is simulated by manually manufacturing rock core.
5th, displacement oil is crude oil, viscosity 15.2mPa.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 0.2mL/min speed
The injection configuration water into rock core is spent, the pressure and flow are recorded when pressure stability；
(5) the positive injection slug A profile control agent 0.1PV into rock core, record pressure during injection profile agent, stand 72 hours
It is stand-by；
(6) water drive is carried out with 1mL/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 total overall reaction is discharged with dilute sulfuric acid in rock core before stifled, from the above in can obtain
Go out, slug A profile control agents have weak seal-off effect to rock core, and profile control agent is moveable in rock core, is left to be subsequently implanted into slug B
Displacement passage.
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 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 m8；
(4) with 1mL/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 accumulative
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 0.1PV of 0.9mL/min speed, placed 60 hours after having noted, then note
Enter to prepare water 0.15PV, be subsequently injected into slug B0.25PV, 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, its Fracture System is improved, has improved recovery ratio 25.86%, illustrate profile control of the present invention
Agent can improve compact oil reservoir anisotropism, 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：Complex polymer, resorcinol, methenamine, calgon, sodium sulfite mass ratio are 0.02%：
0.02%：0.02%：0.07%：0.4%, remaining components are preparation water.
Slug B：Cetyl trimethylammonium bromide, dodecyl sodium sulfate mass ratio are 1%：2.5%, remaining components are
Prepare 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 0.1*10-3μm2, and the zink rod of 3% volume fraction is uniformly added into rock core manufacturing process, it is long
The high 0.05mm of the wide 0.2cm of 0.5cm, to simulate oil reservoir microcrack；Compact oil reservoir is simulated by manually manufacturing rock core.
5th, displacement oil is crude oil, viscosity 13.3mPa.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 0.2mL/min speed
The injection configuration water into rock core is spent, the pressure and flow are recorded when pressure stability；
(5) the positive injection slug A profile control agent 0.1PV into rock core, record pressure during injection profile agent, stand 56 hours
It is stand-by；
(6) water drive is carried out with 1mL/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 total overall reaction is discharged with dilute sulfuric acid in rock core before stifled, from the above in can obtain
Go out, slug A profile control agents have weak seal-off effect to rock core, and profile control agent is moveable in rock core, is left to be subsequently implanted into slug B
Displacement passage.
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 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 m12；
(4) with 1mL/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 accumulative
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 0.1PV of 0.9mL/min speed, placed 66 hours after having noted, then note
Enter to prepare water 0.15PV, be subsequently injected into slug B0.3PV, 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, its Fracture System is improved, has improved recovery ratio 25.34%, illustrate profile control of the present invention
Agent can improve compact oil reservoir anisotropism, and profile control effect is obvious.
Claims (6)
1. the double slug type profile control agents of a kind of compact oil reservoir, it is characterised in that including slug A profile control agents and slug B；
Slug A profile control agents include Complex polymer and additive；Wherein, Complex polymer by two kinds of different molecular quality part
Hydrolyzed polyacrylamide forms, and molecular mass is respectively 400*104、600*104, its mass ratio is 85：15；Between additive includes
Benzenediol, methenamine, calgon, sodium sulfite；In slug A profile control agents, Complex polymer mass ratio is 0.01%-
0.02%, resorcinol mass ratio is 0.01%-0.02%, and methenamine mass ratio is 0.01%-0.02%, calgon
Mass ratio is 0.03%-0.07%, and sodium sulfite mass ratio is 0.2%-0.4%, and remaining components are preparation water；And
Slug B includes cetyl trimethylammonium bromide and dodecyl sodium sulfate；In slug B, cetyl trimethyl bromination
Ammonium mass ratio is 0.5%-1%, and dodecyl sodium sulfate mass ratio is 2%-2.5%, and remaining components are preparation water.
A kind of 2. double slug type profile control agents of compact oil reservoir as claimed in claim 1, it is characterised in that the slug A profile control agents
Middle Complex polymer, resorcinol, methenamine, calgon, sodium sulfite mass ratio are 0.012%-0.018%：
0.012%-0.018%：0.012%-0.018%：0.04%-0.06%：0.25%-0.35%, remaining components are preparation water.
A kind of 3. double slug type profile control agents of compact oil reservoir as claimed in claim 1, it is characterised in that the slug A profile control agents
Middle Complex polymer, resorcinol, methenamine, calgon, sodium sulfite mass ratio are 0.015%：0.014%：
0.015%：0.05%：0.3%, remaining components are preparation water.
4. the double slug type profile control agents of a kind of compact oil reservoir as claimed in claim 1, it is characterised in that 16 in the slug B
Alkyl trimethyl ammonium bromide, dodecyl sodium sulfate mass ratio are 0.7%-0.9%：2.1%-2.3%, remaining components are preparation
Water.
5. the double slug type profile control agents of a kind of compact oil reservoir as claimed in claim 1, it is characterised in that 16 in the slug B
Alkyl trimethyl ammonium bromide, dodecyl sodium sulfate mass ratio are 0.8%：2.2%, remaining components are preparation water.
6. the application method of the double slug type profile control agents of a kind of compact oil reservoir, 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 30-55 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 48-72 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 0.15PV, injects slug B profile control agents, then carries out follow-up note and adopts operation.
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Application publication date: 20171124 |