CN107365572A - A kind of double slug profile control agents of Fracture with low permeability oil deposit deep part and its application method - Google Patents
A kind of double slug profile control agents of Fracture with low permeability oil deposit deep part and its application method Download PDFInfo
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- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 45
- 238000002347 injection Methods 0.000 claims description 33
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- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 claims description 26
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- 238000002360 preparation method Methods 0.000 claims description 22
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- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims description 15
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 15
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 15
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 15
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 15
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims description 14
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 14
- 235000010299 hexamethylene tetramine Nutrition 0.000 claims description 14
- 229960004011 methenamine Drugs 0.000 claims description 14
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- 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 14
- ZUGAOYSWHHGDJY-UHFFFAOYSA-K 5-hydroxy-2,8,9-trioxa-1-aluminabicyclo[3.3.2]decane-3,7,10-trione Chemical compound [Al+3].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O ZUGAOYSWHHGDJY-UHFFFAOYSA-K 0.000 claims description 13
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 claims description 13
- 229960004889 salicylic acid Drugs 0.000 claims description 13
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- 229910052760 oxygen Inorganic materials 0.000 claims description 10
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- -1 perfluoroalkyl betain Chemical compound 0.000 claims description 8
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- DDXLVDQZPFLQMZ-UHFFFAOYSA-M dodecyl(trimethyl)azanium;chloride Chemical compound [Cl-].CCCCCCCCCCCC[N+](C)(C)C DDXLVDQZPFLQMZ-UHFFFAOYSA-M 0.000 claims description 4
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- 238000002156 mixing Methods 0.000 claims description 3
- 229960001755 resorcinol Drugs 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
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- 239000003583 soil stabilizing agent Substances 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 abstract description 26
- 238000011084 recovery Methods 0.000 abstract description 22
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- 239000011435 rock Substances 0.000 description 72
- 206010017076 Fracture Diseases 0.000 description 37
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 36
- 208000010392 Bone Fractures Diseases 0.000 description 34
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- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
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- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
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- 239000011780 sodium chloride Substances 0.000 description 2
- 230000010148 water-pollination Effects 0.000 description 2
- MPNXSZJPSVBLHP-UHFFFAOYSA-N 2-chloro-n-phenylpyridine-3-carboxamide Chemical compound ClC1=NC=CC=C1C(=O)NC1=CC=CC=C1 MPNXSZJPSVBLHP-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 206010020852 Hypertonia Diseases 0.000 description 1
- UEZVMMHDMIWARA-UHFFFAOYSA-N Metaphosphoric acid Chemical compound OP(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-N 0.000 description 1
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
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- 239000001993 wax Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/44—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing organic binders only
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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
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
- C09K8/467—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement containing additives for specific purposes
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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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
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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
- C09K8/584—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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- 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
-
- 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
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/02—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground by explosives or by thermal or chemical means
-
- 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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- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
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Abstract
A kind of double slug profile control agents of Fracture with low permeability oil deposit deep part and its application method, are related to field use chemical field.The present invention injects Fracture with low permeability oil reservoir by double slug forms, and preposed attributives have delay into colloidality, and viscosity is low when initial stage injects oil reservoir, can enter oil reservoir near wellbore zone, middle part, Deep Fractures, stable closure is formed after plastic；Rearmounted slug uses low molecule quality Complex polymer, and adds appropriate clay stabilizer and surfactant, possesses compared with low-viscosity, can suppress clay swelling phenomenon in displacement process, improves the phenomenon that wax, colloid, asphalitine deposit near wellbore zone；Improve Reservoir Heterogeneity by way of double slug combinations, increase sequent water flooding sweep efficiency, suppress Fracture with low permeability oil reservoir region of bypassed oil and formed, to improve the drawbacks such as traditional oil production method, deficiency in economic performance low to Fracture with low permeability oil recovery.
Description
Technical field
The present invention relates to a kind of double slug profile control agents of Fracture with low permeability oil deposit deep part and its application method, the profile control agent to improve
Reservoir adaptability, and then Fracture with low permeability oil reservoir oil recovery can be improved, belong to field use chemical agent field.
Background technology
As deepening continuously for oil-gas exploration work, the raising year by year of degree of prospecting, oil-gas exploration difficulty are also more and more big,
Unconventional petroleum resources has turned into the focus of exploration and development.Fracture with low permeability oil reservoir has that permeability is low, pore throat is narrow and microcrack
The feature of development, and there is certain anisotropism；Due to the influence of the factors such as temperature, pressure, during easily causing water drive
Generation water breakthrough, fingering, non-available water circulating phenomenon；In operation process, reservoir is highly prone to the injury of the external fluid that is incompatible, simultaneously
Due to the influence of the factors such as temperature, pressure, easily cause wax, colloid, asphalitine and deposited near wellbore zone, formed organic stifled
Plug；A large amount of actual recoverys percent of reserves of Fracture with low permeability oil reservoir are 10%~20%, and recovery percent of reserves is relatively low, and partial fracture development is intensive
The waterflooding extraction of decades is passed through in oil field, and recovery ratio all the time could not be more than 20%, and exploitation of the tradition to Fracture with low permeability oil reservoir is related to
Problems with：
First, development of fields development effectiveness is deteriorated, aqueous rise is accelerated, and production decline is accelerated；Second, Fracture System
Influence, especially diaclase exacerbates the anisotropism of oil reservoir, and during waterflooding extraction, the injection water capacity is easily along crack system
System is advanced by leaps and bounds forward, thus it is quick along the oil well of fractuer direction, but moisture content rises also quickly, easily forms water breakthrough, or even make
Into sudden water flooding, reserves utilization rate is reduced, increases oil field development difficulty；Third, non-clinical visit rate grade is more and more lower, it is main
Concentrate in special low abundance and ultra-low permeability reservoir, the technical difficulty of preferably block and waterflooding extraction is increasing；Fourth, open
Hair potentiality and effective measures gradually decrease, and cost increase, the contradiction of input and output increasingly increases.
Under these circumstances, traditional mining type and method are difficult to the needs for meeting the development of Fracture with low permeability oil reservoir, especially
Need for drop investment, cost declining and the effective way for dropping energy consumption, carry out supporting practical development technique tackling key problem, to studying and
Solve the problems, such as to improve rate of oil production, recovery ratio and economic benefit in oil field development, so as to promote the effective of Fracture with low permeability oil reservoir
Employ and commercial development.
Recovery efficiency technique demand is improved for Fracture with low permeability oil reservoir, the present invention designs a kind of double slug profile control agents in deep, 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 profile control agents of Fracture with low permeability oil deposit deep part and its application method, it is special
Sign is, injects Fracture with low permeability oil reservoir by double slug forms, there is preposed attributives delay to be glued into colloidality, initial stage when injecting oil reservoir
Spend low, oil reservoir near wellbore zone, middle part, Deep Fractures can be entered, stable closure is formed after plastic；Rearmounted slug uses low molecule matter
Complex polymer is measured, and adds appropriate clay stabilizer and surfactant, possesses compared with low-viscosity, displacement process can be suppressed
Middle clay swelling phenomenon, improve the phenomenon that wax, colloid, asphalitine deposit near wellbore zone；By way of double slug combinations
Improve Reservoir Heterogeneity, increase sequent water flooding sweep efficiency, suppress Fracture with low permeability oil reservoir region of bypassed oil and formed, adopted with improving tradition
The drawbacks such as oily method is low to Fracture with low permeability oil recovery, deficiency in economic performance.
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 profile control agents of Fracture with low permeability oil deposit deep part and its application method, it is led
The composition is wanted to be：Hydroxypropyl methyl cellulose, sodium gluconate, triethanolamine, calgon, clay stabilizer, aluminium citrate,
Partially hydrolyzed polyacrylamide (PHPA) relative molecular weight is respectively 500*104、800*104、1000*104, surfactant, citric acid,
Resorcinol, salicylic acid, methenamine；Wherein clay stabilizer concretely ammonium chloride, DTAC with
And other are applied to the clay stabilizer of Fracture with low permeability oil reservoir, surfactant concretely NPE, 12
Sodium alkyl benzene sulfonate or perfluoroalkyl betain；For Fracture with low permeability oil reservoir, double slug formula profile control agents are designed, below with slug A
Profile control agent and slug B profile control agents are described.
It is steady that slug A profile control agents include hydroxypropyl methyl cellulose, sodium gluconate, triethanolamine, calgon, clay
Determine agent, aluminium citrate；In slug A profile control agents, hydroxypropyl methyl cellulose mass ratio is 0.1%-0.2%, sodium gluconate matter
It is 0.1%-0.2% to measure ratio, and triethanolamine mass ratio is 0.1%-0.2%, and calgon mass ratio is 0.1%-0.2%,
Clay stabilizer mass ratio is 0.2%-0.4%, and aluminium citrate mass ratio is 0.1%-0.2%, and remaining components are preparation water.
Preferably, in slug A profile control agents, hydroxypropyl methyl cellulose, sodium gluconate, triethanolamine, calgon,
Clay stabilizer, aluminium citrate mass ratio are 0.12%-0.18%：0.12%-0.18%：0.12%-0.18%：0.12%-
0.18%：0.25%-0.35%：0.12%-0.18%, remaining components are preparation water.
It is highly preferred that in slug A profile control agents, hydroxypropyl methyl cellulose, sodium gluconate, triethanolamine, hexa metaphosphoric acid
Sodium, clay stabilizer, aluminium citrate mass ratio are 0.15%：0.15%：0.15%：0.15%：0.3%：0.15%, remaining group
It is divided into preparation water.
Slug A profile control agent main function mechanism is that slug A is that the sealing agent into colloidality, sodium gluconate are made with delay
For delayer hydroxypropyl methyl cellulose can be made to be delayed plastic, viscosity is low, mobility is strong during beginning injection oil reservoir, can enter oil reservoir
Near wellbore zone, middle part, Deep Fractures, stable closure is formed after plastic；Aluminium citrate can strengthen hydroxypropyl methyl as crosslinking agent
Cohesion between cellulosic molecule, increase profile control agent stability, viscosity and broken glue time；Triethanolamine makes as auxiliary crosslinking agent
With, enhancing profile control agent stability, and the increase broken glue time；Calgon plays dispersant effect, can make hydroxypropyl methyl
Cellulose is intermolecular in aqueous to be more uniformly spread, and increase molecular coil periphery absorption affinity, is being split so as to improve profile control agent
Plugging effect in seam；Contain appropriate clay stabilizer in slug A, the hair of clay swelling phenomenon can be reduced in injection process
It is raw, avoid injecting hypertonia；Slug A is mainly used as blocking crack, hypertonic band in Fracture with low permeability oil reservoir, to improve the non-of oil reservoir
Homogenieity, make to be subsequently implanted into slug B profile control agents and can enter and do not involve duct, so as to form double slugs synergies.
Slug B profile control agents include Complex polymer and additive；Wherein, Complex polymer is by three kinds of different molecular Quality Mgmt Dept
Divide hydrolyzed polyacrylamide composition, molecular mass is respectively 500*104、800*104、1000*104, its mass ratio is 80：15：5；
Additive includes clay stabilizer, surfactant, citric acid, resorcinol, salicylic acid, methenamine；Slug B profile control agents
In, Complex polymer mass ratio is 0.05%-0.1%, and clay stabilizer mass ratio is 0.2%-0.3%, surfactant matter
It is 0.1%-0.3% to measure ratio, and citric acid mass ratio is 0.1%-0.2%, and resorcinol mass ratio is 0.02%-0.03%, water
Poplar acid mass ratio is 0.02%-0.03%, and methenamine mass ratio is 0.02%-0.03%, and remaining components are preparation water.
Preferably, in slug B profile control agents, Complex polymer, clay stabilizer, surfactant, citric acid, isophthalic two
Phenol, salicylic acid, the mass ratio of methenamine are 0.06%-0.09%：0.22%-0.28%：0.15%-0.2%：0.12%-
0.18%：0.022%-0.028%：0.022%-0.028%：0.022%-0.028%, remaining components are preparation water.
It is highly preferred that in slug B profile control agents, Complex polymer, clay stabilizer, surfactant, citric acid, isophthalic two
Phenol, salicylic acid, the mass ratio of methenamine are 0.075%：0.25%：0.175%：0.15%：0.025%：0.025%：
0.025%, remaining components are preparation water.
Slug B profile control agent main function mechanism is to be formed by mixing low molecule quality Complex polymer and methenamine
Profile control agent, possess low viscosity, high stability feature, and appropriate clay stabilizer is added in profile control agent, displacement process can be suppressed
Middle clay swelling phenomenon；Resorcinol plays catalyst action, can shorten the time of configuration profile control agent, make it in operation process
Reduce operating cost；Citric acid, salicylic acid play regulation base fluid acidity effect, are firstly added in configuration process, make its with
Underwater gold category ion processed is combined, reduce due to prepare in water salinity it is high caused by precipitation, flocculation, it is same to have necessarily
Crosslinked action；Appropriate surfactant is added in slug B profile control agents, wax, colloid, asphalitine can be improved near wellbore zone
The phenomenon of deposition, and the hydrophily of oil reservoir can be improved, reach the poly- purpose driven and improve recovery ratio, surfactant is adjusted in slug B
Cut open and be eventually adding in agent process for preparation, to avoid degrading with citric acid, salicylism reaction in configuration process；In slug A
After forming effective closure, slug B profile control agents are injected into oil reservoir, can be driven into raw water and not involve duct progress polymer flooding, to subtract
Residual oil blocks to caused by oil reservoir in less porous road, strengthens its flow conductivity；The present invention is improved by way of double slug combinations
Reservoir Heterogeneity, increase sequent water flooding sweep efficiency, suppress Fracture with low permeability oil reservoir region of bypassed oil and formed, and pass through sequent water flooding pair
Oil reservoir is further developed.
The application method of the double slug profile control agents of a kind of Fracture with low permeability oil deposit deep part, it is characterised in that comprise the following steps：
Step 1. combines oil field actual production design data profile control agent injection rate, injection rate and other injection parameters；
Step 2. carries out sudden and violent oxygen processing to preparing water, prepares water and uses oilfield sewage or source water, is dissolved preparing in water
Oxygen content is reduced to below 3mg/L；
Under the conditions of 15-55 DEG C of step 3. temperature range, in the mixing container, medicament is added to preparing in water, is at the uniform velocity stirred
4-6 hours, obtain profile control agent；
Water injection well is connected by step 4. with stainless steel and supercharging device, starts supercharging device, profile control agent is injected into oil reservoir；
Static 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 0.3PV, 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 0.1-0.2PV are injected first into oil reservoir or rock core, wait 48-
Make within 72 hours the abundant plastic of slug A profile control agents, then to driven water-replacing 0.3PV is injected in oil reservoir or rock core, then to oil reservoir or rock
Slug B profile control agent 0.3-0.5PV are injected in the heart, are then carried out follow-up note and are adopted operation.
The present invention the advantage is that relative to prior art：
1st, recovery efficiency technique demand is improved for Fracture with low permeability oil reservoir, the present invention designs a kind of double slugs of Fracture with low permeability oil reservoir
Deep electrical structure, it is characterised in that slug A profile control agents have delay into colloidality, and viscosity is low when initial stage injects oil reservoir, can enter oil
Near wellbore zone, middle part, Deep Fractures are hidden, stable closure is formed after plastic.
2nd, in slug A, it is stable can to increase profile control agent as additive agent for aluminium citrate, triethanolamine, calgon
Property, viscosity and broken glue time, adaptability of the enhancing profile control agent in Fracture with low permeability oil reservoir, so as to improve profile control agent in crack
Plugging effect.
3rd, in slug B, mix low molecule quality Complex polymer and methenamine forms profile control agent, possess low viscosity, height
Stability features, and appropriate clay stabilizer is added in profile control agent, clay swelling phenomenon in displacement process can be suppressed.
4th, appropriate surfactant is added in slug B, wax, colloid, asphalitine can be improved and deposited near wellbore zone
Phenomenon, and the hydrophily of oil reservoir can be improved, reach the poly- purpose driven and improve recovery ratio.
5th, the present invention injects form by double slugs, and improvement Fracture with low permeability Reservoir Heterogeneity, recovery percent of reserves are low, water suction refers to
The low and water injection pressure of number is big, increases sequent water flooding sweep efficiency, suppresses region of bypassed oil generation, to improve traditional oil production method to hypotonic
The drawbacks such as Fractured Reservoir recovery ratio is low, deficiency in economic performance.
Embodiment
Experimental method used in following embodiments is conventional method unless otherwise specified.
The hydroxypropyl methyl cellulose used in following embodiments is that Renqiu City profit produces up to Chemical Co., Ltd., content：
>=99%；Sodium gluconate produces for Shanghai Yi Hui Chemical Co., Ltd.s, content 99%；Triethanolamine is Nanjing chemical reagent stock
The production of part Co., Ltd, analyzes pure AR；Calgon produces for Shandong Ding Xin bio tech ltd, and 98%；Ammonium chloride
Produced for Nanjing chemical reagent limited company, specification：ACS, 99.5%；DTAC is Nanjing chemistry
Reagent limited company produces, purity 98%；Aluminium citrate produces for Jinan Xin Ya Chemical Co., Ltd.s, top pure grade GR；Portion
It is that Daqing Refinery company of CNPC produces to divide hydrolyzed polyacrylamide, relative molecular mass 500*104、800*104、1000*
104, effective mass fraction is 90%；NPE produces for Jiangsu Hai'an Petrochemical Plant, No. CAS：9016-
45-9, purity 98%；Neopelex is the chemical limited company's production in the small open country in Shandong, and analysis is pure；Perfluoroalkyl
Glycine betaine produces for Wuhan Sai Woer Chemical Co., Ltd.s, content：>=98%；Citric acid is the limited public affairs of Nanjing chemical reagent share
Department's production, specification：AR, 99.5%；Resorcinol produces for Guangdong Weng Jiang chemical reagent Co., Ltd, and analysis is pure；Salicylic acid is
Nanjing chemical reagent limited company produces, and analysis is pure；Methenamine produces for Beijing Peng Cai chemical reagent Co., Ltd, point
Analyse pure.
Profile control agent plugging effect is evaluated by laboratory core experimental method, it is specific as follows：
Embodiment one：
1st, profile control agent application method：(1) sudden and violent oxygen processing is carried out to preparing water first, will prepare content of oxygen dissolved in water reduces
To below 3mg/L；(2) under the conditions of 15 DEG C of temperature, medicament is added to preparing in water, at the uniform velocity stirs 4 hours, obtains profile control agent；(3)
Profile control agent is directly injected into rock core after the completion of preparation.
2nd, water is prepared, is 500mg/L by adding NaCl into distilled water and adjusting to salinity, is produced to simulation oil field
The middle source water used.
3rd, concrete medicament application amount is：
Slug A：Hydroxypropyl methyl cellulose, sodium gluconate, triethanolamine, calgon, ammonium chloride, aluminium citrate
Mass ratio is 0.15%：0.15%：0.15%：0.15%：0.3%：0.15%, remaining components are preparation water.
Slug B：Complex polymer is made up of three kinds of different molecular mass fraction hydrolyzed polyacrylamides, molecular mass difference
For 500*104、800*104、1000*104, its mass ratio is 80：15：5；Complex polymer, DTAC,
Perfluoroalkyl betain, citric acid, resorcinol, salicylic acid, the mass ratio of methenamine are 0.075%：0.25%：
0.175%：0.15%：0.025%：0.025%：0.025%, remaining components are preparation water.
4th, specific rock core manufacture scale is as follows：
Experiment rock core is quartz sand epoxy resin cementitious homogeneous artificial core, and specific size is 4.5cm*4.5cm*
30cm, perm-plug method 30*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；Mould is carried out to Fracture with low permeability oil reservoir by manually manufacturing rock core
Intend.
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 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 0.15PV into rock core, record pressure during injection profile agent, it is small to stand 60
When 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 discharge before stifled, from the above in can draw, slug A profile control agents are to simulation core
Profile control effect is obvious, and simulation fracture has formed firm closure, and non-sealing region still has certain fluidity, illustrate the profile control agent with
Simulate source water to combine without negative effect, and seepage channel is left for follow-up slug B profile control agents.
8th, oil-displacement capacity test operating procedure is as follows：
(1) rock core to be used is put into acidproof core holding unit, positive displacement, 30% concentration dilute sulfuric acid of displacement, until
Continue to inject dilute sulfuric acid 5PV, distilled water 5PV after producing without gas in rock core, to ensure that zink rod total overall reaction is discharged with dilute sulfuric acid,
Rock core is taken out after injection；
(2) rock core to be used is put into 70 DEG C of insulating boxs and is dried to constant weight, weighed its quality after taking out cooling, be designated as
m3；
(3) rock core after drying is put into saturation in vacuum pumping device and 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 0.3PV, be subsequently injected into slug B profile control agent 0.4PV, 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 27.01%, illustrate profile control agent of the present invention
Reservoir Heterogeneity 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 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：Hydroxypropyl methyl cellulose, sodium gluconate, triethanolamine, calgon, trimethyl
Ammonium chloride, aluminium citrate mass ratio are 0.1%：0.1%：0.1%：0.1%：0.2%：0.1%, remaining components are preparation water.
Slug B：Complex polymer is made up of three kinds of different molecular mass fraction hydrolyzed polyacrylamides, molecular mass difference
For 500*104、800*104、1000*104, its mass ratio is 80：15：5；Complex polymer, ammonium chloride, DBSA
Sodium, citric acid, resorcinol, salicylic acid, the mass ratio of methenamine are 0.05%：0.2%：0.1%：0.1%：0.02%：
0.02%：0.02%, remaining components are preparation water.
4th, specific rock core manufacture scale is as follows：
Experiment rock core is quartz sand epoxy resin cementitious homogeneous artificial core, and specific size is 4.5cm*4.5cm*
30cm, perm-plug method 30*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；Mould is carried out to Fracture with low permeability oil reservoir by manually manufacturing rock core
Intend.
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 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 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 50 DEG C of constant temperature, is permeated after calculating original permeability according to record result, block up
Rate, sealing ratiod, breakthrough pressure gradient, resistance coefficient.
7th, sealing characteristics evaluation such as following table
Permeability is permeability after zink rod discharge before stifled, from the above in can draw, slug A profile control agents are to simulation core
Profile control effect is obvious, and simulation fracture has formed firm closure, and non-sealing region still has certain fluidity, illustrate the profile control agent with
Simulating oil field produced water is combined without negative effect, and leaves seepage channel for follow-up slug B profile control agents.
8th, oil-displacement capacity test operating procedure is as follows：
(1) rock core to be used is put into acidproof core holding unit, positive displacement, 30% concentration dilute sulfuric acid of displacement, until
Continue to inject dilute sulfuric acid 5PV, distilled water 5PV after producing without gas in rock core, to ensure that zink rod total overall reaction is discharged with dilute sulfuric acid,
Rock core is taken out after injection；
(2) rock core to be used is put into 70 DEG C of insulating boxs and is dried to constant weight, weighed its quality after taking out cooling, be designated as
m7；
(3) rock core after drying is put into saturation in vacuum pumping device and 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 0.15PV of 0.9mL/min speed, placed 48 hours after having noted, then note
Enter to prepare water 0.3PV, be subsequently injected into slug B profile control agent 0.3PV, termination of pumping；
(7) positive water drive experiment is carried out, stops experiment when being driven to aqueous 98%, records oil pump capacity, and it is final to calculate rock core
Recovery ratio value.
9th, oil-displacement capacity evaluation such as following table：
Learnt from above-mentioned data, prepare profile control agent using simulating oil field produced water, driven in the case of 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 27.3%, illustrate profile control of the present invention
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：Hydroxypropyl methyl cellulose, sodium gluconate, triethanolamine, calgon, ammonium chloride, aluminium citrate
Mass ratio is 0.2%：0.2%：0.2%：0.2%：0.4%：0.2%, remaining components are preparation water.
Slug B：Complex polymer is made up of three kinds of different molecular mass fraction hydrolyzed polyacrylamides, molecular mass difference
For 500*104、800*104、1000*104, its mass ratio is 80：15：5；Complex polymer, ammonium chloride, Nonyl pheno
Ether, citric acid, resorcinol, salicylic acid, the mass ratio of methenamine are 0.1%：0.3%：0.3%：0.2%：0.03%：
0.03%：0.03%, remaining components are preparation water.
4th, specific rock core manufacture scale is as follows：
Experiment rock core is quartz sand epoxy resin cementitious homogeneous artificial core, and specific size is 4.5cm*4.5cm*
30cm, perm-plug method 30*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；Mould is carried out to Fracture with low permeability oil reservoir by manually manufacturing rock core
Intend.
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 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 0.2PV 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 70 DEG C of constant temperature, is permeated after calculating original permeability according to record result, block up
Rate, sealing ratiod, breakthrough pressure gradient, resistance coefficient.
7th, sealing characteristics evaluation such as following table
Permeability is permeability after zink rod discharge before stifled, from the above in can draw, slug A profile control agents are to simulation core
Profile control effect is obvious, and simulation fracture has formed firm closure, and non-sealing region still has certain fluidity, illustrate the profile control agent with
Simulating oil field produced water is combined without negative effect, and leaves seepage channel for follow-up slug B profile control agents.
8th, oil-displacement capacity test operating procedure is as follows：
(1) rock core to be used is put into acidproof core holding unit, positive displacement, 30% concentration dilute sulfuric acid of displacement, until
Continue to inject dilute sulfuric acid 5PV, distilled water 5PV after producing without gas in rock core, to ensure that zink rod total overall reaction is discharged with dilute sulfuric acid,
Rock core is taken out after injection；
(2) rock core to be used is put into 70 DEG C of insulating boxs and is dried to constant weight, weighed its quality after taking out cooling, be designated as
m11；
(3) rock core after drying is put into saturation in vacuum pumping device and 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 0.2PV of 0.9mL/min speed, placed 72 hours after having noted, then note
Enter to prepare water 0.3PV, be subsequently injected into slug B profile control agent 0.5PV, 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 26.1%, illustrate profile control of the present invention
Agent can improve Reservoir Heterogeneity, and profile control effect is obvious.
Claims (8)
1. the double slug profile control agents of a kind of Fracture with low permeability oil deposit deep part, it is characterised in that including slug A profile control agents and slug B profile controls
Agent；
It is stable that slug A profile control agents include hydroxypropyl methyl cellulose, sodium gluconate, triethanolamine, calgon, clay
Agent, aluminium citrate；In slug A profile control agents, hydroxypropyl methyl cellulose mass ratio is 0.1%-0.2%, sodium gluconate quality
Than being 0.1%-0.2% for 0.1%-0.2%, triethanolamine mass ratio, calgon mass ratio is 0.1%-0.2%, is sticked
Soil stabilizer mass ratio is 0.2%-0.4%, and aluminium citrate mass ratio is 0.1%-0.2%, and remaining components are preparation water；And
Slug B profile control agents include Complex polymer and additive；Wherein, Complex polymer is by three kinds of different molecular mass fraction water
Polyacrylamide composition is solved, molecular mass is respectively 500*104、800*104、1000*104, its mass ratio is 80：15：5；Addition
Agent includes clay stabilizer, surfactant, citric acid, resorcinol, salicylic acid, methenamine；It is multiple in slug B profile control agents
It is 0.05%-0.1% with polymer quality ratio, clay stabilizer mass ratio is 0.2%-0.3%, and surfactant qualities ratio is
0.1%-0.3%, citric acid mass ratio are 0.1%-0.2%, and resorcinol mass ratio is 0.02%-0.03%, salicylic acid matter
It is 0.02%-0.03% to measure ratio, and methenamine mass ratio is 0.02%-0.03%, and remaining components are preparation water.
2. the double slug profile control agents of a kind of Fracture with low permeability oil deposit deep part as claimed in claim 1, it is characterised in that the clay is steady
Determine agent include ammonium chloride, DTAC and other be applied to Fracture with low permeability oil reservoir clay stabilizer.
3. the double slug profile control agents of a kind of Fracture with low permeability oil deposit deep part as claimed in claim 1, it is characterised in that live on the surface
Property agent includes NPE, neopelex or perfluoroalkyl betain.
A kind of 4. double slug profile control agents of Fracture with low permeability oil deposit deep part as claimed in claim 1, it is characterised in that the slug A
Hydroxypropyl methyl cellulose, sodium gluconate, triethanolamine, calgon, clay stabilizer, citric acid aluminum in profile control agent
It is 0.12%-0.18% to measure ratio：0.12%-0.18%：0.12%-0.18%：0.12%-0.18%：0.25%-0.35%：
0.12%-0.18%, remaining components are preparation water.
A kind of 5. double slug profile control agents of Fracture with low permeability oil deposit deep part as claimed in claim 1, it is characterised in that the slug A
Hydroxypropyl methyl cellulose, sodium gluconate, triethanolamine, calgon, clay stabilizer, citric acid aluminum in profile control agent
Amount is than being 0.15%：0.15%：0.15%：0.15%：0.3%：0.15%, remaining components are preparation water.
A kind of 6. double slug profile control agents of Fracture with low permeability oil deposit deep part as claimed in claim 1, it is characterised in that the slug B
Complex polymer, clay stabilizer, surfactant, citric acid, resorcinol, salicylic acid, the matter of methenamine in profile control agent
It is 0.06%-0.09% to measure ratio：0.22%-0.28%：0.15%-0.2%：0.12%-0.18%：0.022%-0.028%：
0.022%-0.028%：0.022%-0.028%, remaining components are preparation water.
A kind of 7. double slug profile control agents of Fracture with low permeability oil deposit deep part as claimed in claim 1, it is characterised in that the slug B
Complex polymer, clay stabilizer, surfactant, citric acid, resorcinol, salicylic acid, the matter of methenamine in profile control agent
Amount is than being 0.075%：0.25%：0.175%：0.15%：0.025%：0.025%：0.025%, remaining components are preparation water.
8. the application method of the double slug profile control agents of a kind of Fracture with low permeability oil deposit deep part, it is characterised in that comprise the following steps：
Step 1. combines oil field actual production design data profile control agent injection rate, injection rate and other injection parameters；
Step 2. carries out sudden and violent oxygen processing to preparing water, prepares water and uses oilfield sewage or source water, will prepare oxygen in water and contains
Amount is reduced to below 3mg/L；
Under the conditions of 15-55 DEG C of step 3. temperature range, in the mixing container, medicament is added to preparing in water, it is small at the uniform velocity to stir 4-6
When, obtain profile control agent；
Water injection well is connected by step 4. with stainless steel and supercharging device, starts supercharging device, profile control agent is injected into oil reservoir；
Static 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 0.3PV, injects slug B profile control agents, then carries out follow-up note and adopts operation.
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| CN201710661102.1A CN107365572A (en) | 2017-08-06 | 2017-08-06 | A kind of double slug profile control agents of Fracture with low permeability oil deposit deep part and its application method |
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| CN201710661102.1A CN107365572A (en) | 2017-08-06 | 2017-08-06 | A kind of double slug profile control agents of Fracture with low permeability oil deposit deep part and its application method |
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| CN107365572A true CN107365572A (en) | 2017-11-21 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109852362A (en) * | 2018-12-28 | 2019-06-07 | 中国海洋石油集团有限公司 | The double slug profile control agents and its method for implanting that heterogeneous reservoir predominant pathway controls after a kind of poly- drive |
| CN110551491A (en) * | 2018-05-31 | 2019-12-10 | 中国石油化工股份有限公司 | Coating plugging agent, preparation method thereof and plugging slurry |
| CN111611670A (en) * | 2019-02-25 | 2020-09-01 | 中国石油天然气股份有限公司 | Method, equipment and system for multi-section plug combined type deep profile control and flooding |
-
2017
- 2017-08-06 CN CN201710661102.1A patent/CN107365572A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110551491A (en) * | 2018-05-31 | 2019-12-10 | 中国石油化工股份有限公司 | Coating plugging agent, preparation method thereof and plugging slurry |
| CN109852362A (en) * | 2018-12-28 | 2019-06-07 | 中国海洋石油集团有限公司 | The double slug profile control agents and its method for implanting that heterogeneous reservoir predominant pathway controls after a kind of poly- drive |
| CN111611670A (en) * | 2019-02-25 | 2020-09-01 | 中国石油天然气股份有限公司 | Method, equipment and system for multi-section plug combined type deep profile control and flooding |
| CN111611670B (en) * | 2019-02-25 | 2022-11-04 | 中国石油天然气股份有限公司 | Method, equipment and system for multi-section plug combined type deep profile control and drive |
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Application publication date: 20171121 |