CN107384344A - A kind of double slug Compositional type profile control agents of anti-rhythm oil reservoir and its application method - Google Patents
A kind of double slug Compositional type profile control agents of anti-rhythm oil reservoir and its application method Download PDFInfo
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- CN107384344A CN107384344A CN201710659468.5A CN201710659468A CN107384344A CN 107384344 A CN107384344 A CN 107384344A CN 201710659468 A CN201710659468 A CN 201710659468A CN 107384344 A CN107384344 A CN 107384344A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 92
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 75
- 229920000642 polymer Polymers 0.000 claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 10
- 239000000654 additive Substances 0.000 claims abstract description 6
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- 238000002156 mixing Methods 0.000 claims abstract description 4
- 238000002347 injection Methods 0.000 claims description 40
- 239000007924 injection Substances 0.000 claims description 40
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 30
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims description 30
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 claims description 28
- 238000002360 preparation method Methods 0.000 claims description 19
- WYYQVWLEPYFFLP-UHFFFAOYSA-K chromium(3+);triacetate Chemical compound [Cr+3].CC([O-])=O.CC([O-])=O.CC([O-])=O WYYQVWLEPYFFLP-UHFFFAOYSA-K 0.000 claims description 15
- 235000010265 sodium sulphite Nutrition 0.000 claims description 15
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 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
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 12
- 235000010299 hexamethylene tetramine Nutrition 0.000 claims description 12
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims description 12
- 229960004011 methenamine Drugs 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- 239000001301 oxygen Substances 0.000 claims description 12
- 239000003814 drug Substances 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 5
- 239000010865 sewage Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000004033 plastic Substances 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
- 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
- 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 18
- 239000004094 surface-active agent Substances 0.000 abstract description 12
- 230000033764 rhythmic process Effects 0.000 abstract description 9
- 150000001875 compounds Chemical class 0.000 abstract description 7
- 238000013329 compounding Methods 0.000 abstract description 6
- 239000011159 matrix material Substances 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 230000007812 deficiency Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 73
- 239000011435 rock Substances 0.000 description 70
- 239000010410 layer Substances 0.000 description 26
- 230000035699 permeability Effects 0.000 description 22
- 238000002474 experimental method Methods 0.000 description 20
- 238000005086 pumping Methods 0.000 description 18
- 230000000694 effects Effects 0.000 description 17
- 238000006073 displacement reaction Methods 0.000 description 15
- 230000015572 biosynthetic process Effects 0.000 description 11
- 238000007789 sealing Methods 0.000 description 10
- 239000010779 crude oil Substances 0.000 description 9
- 238000001816 cooling Methods 0.000 description 6
- 238000001035 drying Methods 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 6
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- 238000012360 testing method Methods 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- 239000006004 Quartz sand Substances 0.000 description 3
- 239000012153 distilled water Substances 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 230000008595 infiltration Effects 0.000 description 3
- 238000001764 infiltration Methods 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 230000009467 reduction Effects 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
- 239000000084 colloidal system Substances 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000001879 gelation Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000015784 hyperosmotic salinity response Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium 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
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 1
- 241000237858 Gastropoda Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
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- 238000009826 distribution Methods 0.000 description 1
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- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 239000000693 micelle Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 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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- 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
- C09K8/50—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
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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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- 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
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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
- 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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Abstract
A kind of double slug Compositional type profile control agents of anti-rhythm oil reservoir and its application method, are related to field use chemical field.The present invention is injected in anti-rhythm oil reservoir by double slug forms, and preposed attributives form the polymer with matrix type cross-linked structure by mixing different molecular mass fraction hydrolyzed polyacrylamide and additive, compounding, can implement firm closure to hypertonic band at the top of oil reservoir；Rearmounted slug is compound surfactant, injects oil reservoir after preposed attributives effectively block, to being oozed in oil reservoir, hypotonic band implement surfactant flooding, with reduce residual oil content in oil reservoir, increase injectivity index；Improve Reservoir Heterogeneity by way of double slug combinations, increase sequent water flooding sweep efficiency, suppress anti-rhythm oil reservoir region of bypassed oil and formed, to improve traditional oil production method to drawbacks such as the anti-low, deficiencies in economic performance of rhythm oil recovery.
Description
Technical field
The present invention relates to a kind of double slug Compositional type profile control agents of anti-rhythm oil reservoir and its application method, the profile control agent to improve
Reservoir adaptability, and then anti-rhythm oil reservoir oil recovery can be improved, belong to field use chemical agent field.
Background technology
Reservoir heterogeneity refers to the inhomogeneity inside reservoir, is mainly shown as the side such as reservoir lithology, physical property, oiliness
The anisotropy in face, it is the main reason for influenceing remaining oil distribution；Changed according to the microcosmic Petrographic Features on reservoir longitudinal direction
Rule, it is divided into positive rhythm, the anti-rhythm and compound rhythm reservoir；Anti- rhythm oil reservoir reflection depositional environment hydrodynamic condition grows from weak to strong
Rule changes, and its highest permeable formation is at the top of sand body, and lithology, physical property are gradually deteriorated from top to bottom, and density gradually increases, apparent resistance
Rate reduces, and due to the difference of deposition, the permeability grade of many coarsening upwards sands changes very greatly, so as to cause oil-containing saturation
The difference of degree, it is a kind of highly undesirable oil reservoir.
For a large amount of anti-actual recoverys percent of reserves of rhythm oil reservoir 10%~20%, recovery percent of reserves is relatively low, there are some researches show：The anti-rhythm
Reservoir Permeability is differential bigger, and its anisotropism is more serious, and recovery percent of reserves is lower, faster, the high permeability formation oil displacement efficiency of aqueous rising
Higher, low-permeability layer oil displacement efficiency is then lower；During waterflooding extraction, the injection water overwhelming majority all pours in high permeability formation, and in, it is low
The water-driven situation of infiltration layer is very poor；Due to interlayer contradiction, most moveable oils of middle and high infiltration layer are in injection pore volume
Produced before 1PV, influence of the injection water later more than 1PV to improving recovery ratio amplitude is relatively small；The main branch of remaining oil
In hypotonic interval, permeability grade is bigger, and low-permeability layer oil displacement efficiency is lower, and the ratio of remaining oil branch is bigger.
Recovery efficiency technique demand is improved for anti-rhythm oil reservoir, the present invention designs a kind of double slug Compositional type profile control agents, gram
Taken 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 Compositional type profile control agents of anti-rhythm oil reservoir and its application method, it is special
Sign is, is injected by double slug forms in anti-rhythm oil reservoir, and preposed attributives are poly- by mixing the hydrolysis of different molecular mass fraction
Acrylamide and additive, compounding form the polymer with matrix type cross-linked structure, hypertonic band at the top of oil reservoir can be implemented steady
Sealing is blocked up；Rearmounted slug is compound surfactant, injects oil reservoir after preposed attributives effectively block, to being oozed in oil reservoir, hypotonic
Band implements surfactant flooding, to reduce residual oil content in oil reservoir, increase injectivity index；Changed by way of double slug combinations
Kind Reservoir Heterogeneity, increases sequent water flooding sweep efficiency, suppresses anti-rhythm oil reservoir region of bypassed oil and formed, to improve traditional oil recovery side
Method is to drawbacks such as the anti-low, deficiencies in economic performance of rhythm oil recovery.
To reach above-mentioned purpose, the present invention adopts the following technical scheme that.
A kind of double slug Compositional type profile control agents of anti-rhythm oil reservoir, its main component are：Partially hydrolyzed polyacrylamide (PHPA) is relative
Molecular mass is respectively 1200*104、1800*104、2400*104, chromium acetate, sodium sulfite, resorcinol, thiocarbamide, Wu Luotuo
Product, cetyl trimethylammonium bromide, dodecyl sodium sulfate；For anti-rhythm oil reservoir, double slug formula profile control agents are designed, below
It is described with slug A profile control agents and slug B.
Slug A profile control agents include Complex polymer and additive；Wherein, Complex polymer is by three kinds of different molecular quality
Partially hydrolyzed polyacrylamide (PHPA) forms, and molecular mass is respectively 1200*104、1800*104、2400*104, its mass ratio is 15：
35：50；Additive includes chromium acetate, sodium sulfite, resorcinol, thiocarbamide, methenamine；In slug A profile control agents, compounding polymerization
Amount of substance ratio is 0.25%-0.3%, and chromium acetate mass ratio is 0.03%-0.05%, and sodium sulfite mass ratio is 0.2%-
0.4%, resorcinol mass ratio is 0.2%-0.4%, and thiocarbamide mass ratio is 0.1%-0.3%, and methenamine mass ratio is
0.2%-0.25%, remaining components are preparation water.
Preferably, in slug A profile control agents, Complex polymer, chromium acetate, sodium sulfite, resorcinol, thiocarbamide, Wu Luotuo
Quality ratio is 0.26%-0.29%：0.035%-0.045%：0.25%-0.35%：0.25%-0.35%：0.15%-
0.25%：0.21%-0.24%, remaining components are preparation water.
It is highly preferred that in slug A profile control agents, Complex polymer, chromium acetate, sodium sulfite, resorcinol, thiocarbamide, Wu Luo
Tropine mass ratio is 0.27%：0.04%：0.3%：0.3%：0.2%：0.23%, remaining components are preparation water.
Slug A profile control agent main function mechanism is, by compounding three kinds of molecular mass partially hydrolyzed polyacrylamide (PHPA)s, to be formed
Compositional type polymer with molecular coil form, it is used as crosslinking agent by adding chromium acetate, resorcinol, methenamine, can
Matrix type cross-linked structure is formed, there is delayed gelation, colloid physical property stabilization, broken glue time length, salt tolerance effect；Sodium sulfite,
Thiocarbamide can effectively suppress in process for preparation with the oxygen in oil reservoir to viscosity reduction effect caused by profile control agent as oxygen scavenger, so as to strengthen
The stability of polymer；Slug A is mainly used as blocking high permeability formation at the top of anti-rhythm oil reservoir, improves the heterogeneous of anti-rhythm oil reservoir
Property, make to be subsequently implanted into slug B into anti-rhythm oil reservoir, less permeable layer, so as to form double slugs synergies.
Slug B includes cetyl trimethylammonium bromide and dodecyl sodium sulfate；In slug B, cetyl trimethyl
Ammonium bromide mass ratio is 1%-2%, and dodecyl sodium sulfate mass ratio is 3%-4%, and remaining components are preparation water.
Preferably, in slug B, cetyl trimethylammonium bromide, dodecyl sodium sulfate mass ratio are 1.2%-
1.8%：3.2%-3.8%, remaining components are preparation water.
It is highly preferred that in slug B, cetyl trimethylammonium bromide, dodecyl sodium sulfate mass ratio are 1.5%：
3.5%, 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
Stratum water；And two kinds of surfactant compound application effects are better than single surfactant；Effective closure is formed in slug A
Afterwards, slug B is injected into oil reservoir, oozed in can entering, low-permeability layer carries out surfactant flooding, to be oozed in reduction, low-permeability layer residual oil
Closure, strengthens its flow conductivity to caused by oil reservoir；The present invention improves Reservoir Heterogeneity by way of double slug combinations, increases
Add sequent water flooding sweep efficiency, anti-rhythm reservoir profile effect is poor, invalid water circulation so as to improve.
The application method of the double slug Compositional type profile control agents of a kind of anti-rhythm 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 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；
Step 4. carries out machine plugging operation to water injection well, blocks in anti-rhythm oil reservoir, hypotonic band, enters injection profile agent
Enter the hypertonic band in top；
Water injection well is connected by step 5. with stainless steel and supercharging device, starts supercharging device, and slug A profile control agents are injected
Oil reservoir, after injection rate reaches preset range static 24-48 hours make the abundant plastic of profile control agent；
Step 6. releases machine plugging, injects driven water-replacing 0.2PV, injects slug B, and injection rate is carried out after reaching preset range
Follow-up note adopts operation.
The specific injection rate of profile control agent is：Slug A profile control agent 0.2-0.4PV are injected first into oil reservoir or rock core, wait 24-
Make within 48 hours the abundant plastic of slug A profile control agents, then to driven water-replacing 0.2PV is injected in oil reservoir or rock core, then to oil reservoir or rock
Slug B0.2-0.3PV is injected in the heart, is then carried out follow-up note and is adopted operation.
The present invention the advantage is that relative to prior art：
1st, in slug A, compounded by three kinds of different molecular mass fraction hydrolyzed polyacrylamides, and add chromium acetate,
Benzenediol, methenamine can form matrix type cross-linked structure polymer, have delayed gelation, colloid physical property steady as crosslinking agent
Fixed, broken glue time length, salt tolerance effect, firm block can be implemented to hypertonic band at the top of anti-rhythm oil reservoir.
2nd, in slug A, by adding sodium sulfite, thiocarbamide is used as oxygen scavenger effectively to suppress in process for preparation and in oil reservoir
Oxygen to viscosity reduction effect caused by profile control agent, 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, during injection profile agent, by way of machine plugging, slug A is made fully to be blocked in top high permeability formation, and due to
Action of Gravity Field, closure is implemented in the remote well area of infiltration layer during slug A can be flowed into the middle part of oil reservoir in injection process, and its plugging effect is better than
Do not use machine plugging.
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 1200*104、1800*104、2400*104, effective mass fraction is 90%；Chromium acetate is Shandong West Asia chemical industry
Co., Ltd produces, and analysis is pure；Sodium sulfite produces for Tianjin Zhi Yuan chemical reagent Co., Ltd, and analysis is pure；Resorcinol
Produced for Guangdong Weng Jiang chemical reagent Co., Ltd, analysis is pure；Thiocarbamide produces for Shandong Jia Ying Chemical Industry Science Co., Ltd, analysis
It is pure；Methenamine produces for Beijing Peng Cai chemical reagent Co., Ltd, and analysis is pure；Cetyl trimethylammonium bromide is Nanjing
The production of reagent limited company is learned, analyzes pure AR；Dodecyl sodium sulfate produces for Nanjing chemical reagent limited company,
Analyze 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 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 simulate actual production
The middle source water used.
3rd, concrete medicament application amount is：
Slug A：Complex polymer is made up of the partially hydrolyzed polyacrylamide (PHPA) of three kinds of different molecular quality, molecular mass point
Wei not 1200*104、1800*104、2400*104, its mass ratio is 15：35：50；Complex polymer, chromium acetate, sodium sulfite,
Resorcinol, thiocarbamide, methenamine mass ratio are 0.27%：0.04%：0.3%：0.3%：0.2%：0.23%, remaining components
To prepare water.
Slug B main components are：Cetyl trimethylammonium bromide, dodecyl sodium sulfate mass ratio are 1.5%：
3.5%, remaining components are preparation water.
4th, specific rock core manufacture scale is as follows：
Experiment rock core is quartz sand epoxy resin cementitious three layers of heterogeneous artificial cores, and specific size is 4.5cm*
4.5cm*30cm, perm-plug method are respectively 500*10-3μm2、1000*10-3μm2、2000*10-3μm2, pass through heterogeneous core
Anti- rhythm oil reservoir is simulated.
5th, displacement oil is crude oil, viscosity 37mPa.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 70 DEG C of insulating boxs and is dried to constant weight, weighed its quality after taking out cooling, be designated as
m1；
(2) 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；
(3) rock core that saturation is configured to water is put into core holding unit, and high permeability formation adds confined pressure 4MPa at top during placement,
Then configuration water is injected into rock core with 2mL/min speed, the pressure and flow are recorded when pressure stability；
(4) baffling device is set in clamper entrance and rock core contact site, stopped in injection fluid inflow, hyposmosis
Layer, to simulate the machine plugging in actual pit shaft, into rock core, positive injection slug A profile control agent 0.3PV, record injection profile
Pressure during agent, stand 24 hours stand-by, baffling devices in releasing clamper；
(5) 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；
(6) 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 three layers of non-average rock core overall permeability before stifled, from the above in can draw, slug A profile control agents pair
Hypertonic bands have formed firm closure at the top of three layers of non-average rock core, in ooze, hypotonic band still has mobility, illustrate the profile control agent and
It is obvious to simulate source water combination profile control effect, and seepage channel is left to be subsequently implanted into slug B.
8th, oil-displacement capacity test operating procedure is as follows：
(1) 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；
(2) 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；
(3) 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；
(4) rock core of the complete crude oil of saturation is put into core holding unit, high permeability formation is at top during placement, and whole process experiment is at 30 DEG C
Carried out in the case of constant temperature, water drive oil carried out with 2mL/min speed, be driven to the port of export it is no longer fuel-displaced when termination of pumping, record oil pump capacity
And recovery ratio；
(5) baffling device is set in clamper entrance and rock core contact site, stopped in injection fluid inflow, hyposmosis
Layer, to simulate the machine plugging in actual pit shaft, with the positive injection slug A profile control agent 0.2PV of 0.9mL/min speed, note
Pressure when recording injection profile agent, stand 24 hours it is stand-by, baffling device in clamper is released, then to injecting driven water-replacing in rock core
0.2PV, the positive injection slug B0.2PV into rock core；
(6) 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 three layers of heterogeneous core, rock core anisotropism is improved, has improved recovery ratio 26.62%, illustrate this hair
Bright profile control agent can improve 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：Complex polymer is made up of the partially hydrolyzed polyacrylamide (PHPA) of three kinds of different molecular quality, molecular mass point
Wei not 1200*104、1800*104、2400*104, its mass ratio is 15：35：50；Complex polymer, chromium acetate, sodium sulfite,
Resorcinol, thiocarbamide, methenamine mass ratio are 0.25%：0.03%：0.2%：0.2%：0.1%：0.2%, remaining components
To prepare water.
Slug B main components are：Cetyl trimethylammonium bromide, dodecyl sodium sulfate mass ratio are 1%：3%, it is remaining
The following group is divided into preparation water.
4th, specific rock core manufacture scale is as follows：
Experiment rock core is quartz sand epoxy resin cementitious three layers of heterogeneous artificial cores, and specific size is 4.5cm*
4.5cm*30cm, perm-plug method are respectively 500*10-3μm2、1000*10-3μm2、2000*10-3μm2, pass through heterogeneous core
Anti- rhythm oil reservoir is simulated.
5th, displacement oil is crude oil, viscosity 32mPa.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 70 DEG C of insulating boxs and is dried to constant weight, weighed its quality after taking out cooling, be designated as
m5；
(2) 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；
(3) rock core that saturation is configured to water is put into core holding unit, and high permeability formation adds confined pressure 4MPa at top during placement,
Then configuration water is injected into rock core with 2mL/min speed, the pressure and flow are recorded when pressure stability；
(4) baffling device is set in clamper entrance and rock core contact site, stopped in injection fluid inflow, hyposmosis
Layer, to simulate the machine plugging in actual pit shaft, into rock core, positive injection slug A profile control agent 0.4PV, record injection profile
Pressure during agent, stand 48 hours stand-by, baffling devices in releasing clamper；
(5) 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；
(6) 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 three layers of non-average rock core overall permeability before stifled, from the above in can draw, slug A profile control agents pair
Hypertonic bands have formed firm closure at the top of three layers of non-average rock core, in ooze, hypotonic band still has mobility, illustrate the profile control agent and
Simulating oil field produced water combination profile control effect is obvious, and leaves seepage channel to be subsequently implanted into slug B.
8th, oil-displacement capacity test operating procedure is as follows：
(1) 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；
(2) 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；
(3) 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；
(4) rock core of the complete crude oil of saturation is put into core holding unit, high permeability formation is at top during placement, and whole process experiment is at 50 DEG C
Carried out in the case of constant temperature, water drive oil carried out with 2mL/min speed, be driven to the port of export it is no longer fuel-displaced when termination of pumping, record oil pump capacity
And recovery ratio；
(5) baffling device is set in clamper entrance and rock core contact site, stopped in injection fluid inflow, hyposmosis
Layer, to simulate the machine plugging in actual pit shaft, with the positive injection slug A profile control agent 0.4PV of 0.9mL/min speed, note
Record pressure during Complex polymer, stand 36 hours it is stand-by, baffling device in clamper is released, then to injecting displacement in rock core
Water 0.2PV, the positive injection slug B0.25PV into rock core；
(6) 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 three layers of heterogeneous core, rock core anisotropism is improved, has improved recovery ratio 26.49%, illustrated this
Invention profile control agent can improve Reservoir Heterogeneity, 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 is made up of the partially hydrolyzed polyacrylamide (PHPA) of three kinds of different molecular quality, molecular mass point
Wei not 1200*104、1800*104、2400*104, its mass ratio is 15：35：50；Complex polymer, chromium acetate, sodium sulfite,
Resorcinol, thiocarbamide, methenamine mass ratio are 0.3%：0.05%：0.4%：0.4%：0.3%：0.25%, remaining components
To prepare water.
Slug B main components are：Cetyl trimethylammonium bromide, dodecyl sodium sulfate mass ratio are 2%：4%, it is remaining
The following group is divided into preparation water.
4th, specific rock core manufacture scale is as follows：
Experiment rock core is quartz sand epoxy resin cementitious three layers of heterogeneous artificial cores, and specific size is 4.5cm*
4.5cm*30cm, perm-plug method are respectively 500*10-3μm2、1000*10-3μm2、2000*10-3μm2, pass through heterogeneous core
Anti- rhythm oil reservoir is simulated.
5th, displacement oil is crude oil, viscosity 25.3mPa.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 70 DEG C of insulating boxs and is dried to constant weight, weighed its quality after taking out cooling, be designated as
m9；
(2) 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；
(3) rock core that saturation is configured to water is put into core holding unit, and high permeability formation adds confined pressure 4MPa at top during placement,
Then configuration water is injected into rock core with 2mL/min speed, the pressure and flow are recorded when pressure stability；
(4) baffling device is set in clamper entrance and rock core contact site, stopped in injection fluid inflow, hyposmosis
Layer, to simulate the machine plugging in actual pit shaft, the positive injection slug A profile control agent 0.25PV into rock core, record, which injects, to be adjusted
Pressure when cuing open agent, stand 36 hours stand-by, baffling devices in releasing clamper；
(5) 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；
(6) 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 three layers of non-average rock core overall permeability before stifled, from the above in can draw, slug A profile control agents pair
Hypertonic bands have formed firm closure at the top of three layers of non-average rock core, in ooze, hypotonic band still has mobility, illustrate the profile control agent and
Simulating oil field produced water combination profile control effect is obvious, and leaves seepage channel to be subsequently implanted into slug B.
8th, oil-displacement capacity test operating procedure is as follows：
(1) 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；
(2) 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；
(3) 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；
(4) rock core of the complete crude oil of saturation is put into core holding unit, high permeability formation is at top during placement, and whole process experiment is at 70 DEG C
Carried out in the case of constant temperature, water drive oil carried out with 2mL/min speed, be driven to the port of export it is no longer fuel-displaced when termination of pumping, record oil pump capacity
And recovery ratio；
(5) baffling device is set in clamper entrance and rock core contact site, stopped in injection fluid inflow, hyposmosis
Layer, to simulate the machine plugging in actual pit shaft, with the positive injection slug A profile control agent 0.4PV of 0.9mL/min speed, note
Record pressure during Complex polymer, stand 36 hours it is stand-by, baffling device in clamper is released, then to injecting displacement in rock core
Water 0.2PV, the positive injection slug B0.3PV into rock core；
(6) 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 three layers of heterogeneous core, rock core anisotropism is improved, has improved recovery ratio 27.42%, illustrated this
Invention profile control agent can improve Reservoir Heterogeneity, and profile control effect is obvious.
Claims (6)
1. the double slug Compositional type profile control agents of a kind of anti-rhythm 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 three kinds of different molecular quality part
Hydrolyzed polyacrylamide forms, and molecular mass is respectively 1200*104、1800*104、2400*104, its mass ratio is 15：35：
50；Additive includes chromium acetate, sodium sulfite, resorcinol, thiocarbamide, methenamine；In slug A profile control agents, Complex polymer
Mass ratio is 0.25%-0.3%, and chromium acetate mass ratio is 0.03%-0.05%, and sodium sulfite mass ratio is 0.2%-0.4%,
Resorcinol mass ratio is 0.2%-0.4%, and thiocarbamide mass ratio is 0.1%-0.3%, and methenamine mass ratio is 0.2%-
0.25%, 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 1%-2%, and dodecyl sodium sulfate mass ratio is 3%-4%, and remaining components are preparation water.
A kind of 2. double slug Compositional type profile control agents of anti-rhythm oil reservoir as claimed in claim 1, it is characterised in that the slug A
Complex polymer, chromium acetate, sodium sulfite, resorcinol, thiocarbamide, methenamine mass ratio are 0.26%- in profile control agent
0.29%：0.035%-0.045%：0.25%-0.35%：0.25%-0.35%：0.15%-0.25%：0.21%-
0.24%, remaining components are preparation water.
A kind of 3. double slug Compositional type profile control agents of anti-rhythm oil reservoir as claimed in claim 1, it is characterised in that the slug A
Complex polymer, chromium acetate, sodium sulfite, resorcinol, thiocarbamide, methenamine mass ratio are 0.27% in profile control agent：
0.04%：0.3%：0.3%：0.2%：0.23%, remaining components are preparation water.
A kind of 4. double slug Compositional type profile control agents of anti-rhythm oil reservoir as claimed in claim 1, it is characterised in that the slug B
Middle cetyl trimethylammonium bromide, dodecyl sodium sulfate mass ratio are 1.2%-1.8%：3.2%-3.8%, remaining components
To prepare water.
A kind of 5. double slug Compositional type profile control agents of anti-rhythm oil reservoir as claimed in claim 1, it is characterised in that the slug B
Middle cetyl trimethylammonium bromide, dodecyl sodium sulfate mass ratio are 1.5%：3.5%, remaining components are preparation water.
6. the application method of the double slug Compositional type profile control agents of a kind of anti-rhythm 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 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；
Step 4. carries out machine plugging operation to water injection well, blocks in anti-rhythm oil reservoir, hypotonic band, injection profile agent is entered top
The hypertonic band in portion；
Water injection well is connected by step 5. with stainless steel and supercharging device, starts supercharging device, and slug A profile control agents are injected into oil
Hide, after injection rate reaches preset range static 24-48 hours make the abundant plastic of profile control agent；
Step 6. releases machine plugging, injects driven water-replacing 0.2PV, injects slug B, and injection rate is carried out subsequently after reaching preset range
Note adopts operation.
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| Application Number | Priority Date | Filing Date | Title |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108559468A (en) * | 2018-04-24 | 2018-09-21 | 中国石油天然气股份有限公司 | A kind of selectivityization blocks up medicament and its application |
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2017
- 2017-08-06 CN CN201710659468.5A patent/CN107384344A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108559468A (en) * | 2018-04-24 | 2018-09-21 | 中国石油天然气股份有限公司 | A kind of selectivityization blocks up medicament and its application |
| CN108559468B (en) * | 2018-04-24 | 2021-01-26 | 中国石油天然气股份有限公司 | Selective blockage removing medicament and application thereof |
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