CN105860947A - Slowly-degradable high-temperature-resistant high-salinity profile control agent and preparation method thereof - Google Patents
Slowly-degradable high-temperature-resistant high-salinity profile control agent and preparation method thereof Download PDFInfo
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- CN105860947A CN105860947A CN201610245136.8A CN201610245136A CN105860947A CN 105860947 A CN105860947 A CN 105860947A CN 201610245136 A CN201610245136 A CN 201610245136A CN 105860947 A CN105860947 A CN 105860947A
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- control agent
- profile control
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- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 91
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000000178 monomer Substances 0.000 claims abstract description 15
- 239000003999 initiator Substances 0.000 claims abstract description 13
- 239000004014 plasticizer Substances 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims abstract description 11
- 230000000593 degrading effect Effects 0.000 claims abstract description 9
- 150000001299 aldehydes Chemical class 0.000 claims abstract 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 24
- 229960004011 methenamine Drugs 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 13
- 150000007974 melamines Chemical class 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 8
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Chemical compound [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 7
- QUDWYFHPNIMBFC-UHFFFAOYSA-N bis(prop-2-enyl) benzene-1,2-dicarboxylate Chemical group C=CCOC(=O)C1=CC=CC=C1C(=O)OCC=C QUDWYFHPNIMBFC-UHFFFAOYSA-N 0.000 claims description 6
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 5
- 235000019394 potassium persulphate Nutrition 0.000 claims description 5
- GZVHEAJQGPRDLQ-UHFFFAOYSA-N 6-phenyl-1,3,5-triazine-2,4-diamine Chemical compound NC1=NC(N)=NC(C=2C=CC=CC=2)=N1 GZVHEAJQGPRDLQ-UHFFFAOYSA-N 0.000 claims description 4
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 4
- 101100115801 Streptomyces mobaraensis daip gene Proteins 0.000 claims description 3
- 238000000354 decomposition reaction Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 2
- 230000003111 delayed effect Effects 0.000 claims description 2
- JRKICGRDRMAZLK-UHFFFAOYSA-L persulfate group Chemical group S(=O)(=O)([O-])OOS(=O)(=O)[O-] JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 claims description 2
- 230000007774 longterm Effects 0.000 abstract description 3
- OMNKZBIFPJNNIO-UHFFFAOYSA-N n-(2-methyl-4-oxopentan-2-yl)prop-2-enamide Chemical compound CC(=O)CC(C)(C)NC(=O)C=C OMNKZBIFPJNNIO-UHFFFAOYSA-N 0.000 abstract description 3
- 238000005086 pumping Methods 0.000 abstract description 3
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical group NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 abstract 2
- 229920000877 Melamine resin Polymers 0.000 abstract 1
- 235000010299 hexamethylene tetramine Nutrition 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 21
- 239000002981 blocking agent Substances 0.000 description 14
- 239000010865 sewage Substances 0.000 description 9
- 239000003921 oil Substances 0.000 description 8
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 7
- 239000011435 rock Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 230000035699 permeability Effects 0.000 description 6
- 239000004641 Diallyl-phthalate Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000003431 cross linking reagent Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 208000016261 weight loss Diseases 0.000 description 3
- 230000004580 weight loss Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000001879 gelation Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- XQJMXPAEFMWDOZ-UHFFFAOYSA-N 3exo-benzoyloxy-tropane Natural products CN1C(C2)CCC1CC2OC(=O)C1=CC=CC=C1 XQJMXPAEFMWDOZ-UHFFFAOYSA-N 0.000 description 1
- QQXLDOJGLXJCSE-UHFFFAOYSA-N N-methylnortropinone Natural products C1C(=O)CC2CCC1N2C QQXLDOJGLXJCSE-UHFFFAOYSA-N 0.000 description 1
- QIZDQFOVGFDBKW-DHBOJHSNSA-N Pseudotropine Natural products OC1C[C@@H]2[N+](C)[C@H](C1)CC2 QIZDQFOVGFDBKW-DHBOJHSNSA-N 0.000 description 1
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- YGCOKJWKWLYHTG-UHFFFAOYSA-N [[4,6-bis[bis(hydroxymethyl)amino]-1,3,5-triazin-2-yl]-(hydroxymethyl)amino]methanol Chemical class OCN(CO)C1=NC(N(CO)CO)=NC(N(CO)CO)=N1 YGCOKJWKWLYHTG-UHFFFAOYSA-N 0.000 description 1
- 125000005336 allyloxy group Chemical group 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- -1 methylol functional groups Chemical group 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- CYHOMWAPJJPNMW-JIGDXULJSA-N tropine Chemical compound C1[C@@H](O)C[C@H]2CC[C@@H]1N2C CYHOMWAPJJPNMW-JIGDXULJSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 210000002268 wool Anatomy 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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/512—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G12/00—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C08G12/02—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes
- C08G12/26—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds
- C08G12/30—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds with substituted triazines
- C08G12/32—Melamines
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/5086—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention provides a profile control agent for slowly degrading high-temperature-resistant and high-salinity-resistant material and a preparation method thereof. The profile control agent comprises 1-4% of melamine monomer; 0.555-4.8% of aldehydes and/or urotropin; 0.5-2% of diacetone acrylamide; 0.05 to 0.2 percent of plasticizer; 0.05 to 0.2 percent of initiator; the balance being water. The preparation method of the profile control agent comprises the steps of sequentially adding melamine monomers, aldehydes and/or urotropine into water, and stirring to form a first solution; and sequentially adding diacetone acrylamide, a plasticizer and an initiator into the first solution, and stirring to obtain the profile control agent. The profile control agent provided by the invention has the advantages of good pumping performance, temperature resistance, long-term effectiveness, simple preparation, low cost and the like.
Description
Technical field
The present invention relates to profile control agent of a kind of high temperature resistant high salinity of slow degraded and preparation method thereof, belong to Water in Water Shutoff in Oil Field and adjust
Cut open technical field.
Background technology
Due to the permeability contrast in interlayer, layer, through steam soak for many years or waterflooding extraction, domestic and international all heavy wools
Field occurs longitudinally and plane is by imitating uneven contradiction, and have even occurs in that between well, serious vapour is altered or the phenomenon of water breakthrough, sternly
Ghost image rings the effect of oil field development.
In order to improve the ultimate recovery of flood effectiveness and oil field, need to take water plugging and profiling technology measure in time, at present
The method of water plugging and profile controlling predominantly machinery card envelope and chemical water shutoff.Machinery card envelope construction is simple, and cost is relatively low, but it
Sphere of action is only limited to pit shaft scope, inconspicuous every interlayer for those, cannot use the oil well of dispensing, preferably solves
Way is exactly chemistry plugging technology.
At present, chemistry plugging technology in use profile control agent be mainly particulate species blocking agent, high temperature organogel class blocking agent,
Resinae blocking agent and foam class blocking agent.
Particulate species blocking agent includes traditional cements, rubber powder, slag powders, flyash and bark powder etc.；Particulate species blocking agent exists
There is problems in that during use that particle diameter is big, non-selectivity, poor, easily to reservoir by property to stratum and pore throat
Damage.
High temperature organogel class blocking agent price is higher, and need during use to undertake is relatively costly.
Resinae blocking agent is divided into thermosetting resin and thermoplastic resin two kinds, and resin blocking agent is mainly used in blocking Thief zone ground
Layer, oil well bottom water shakes out seriously and high-temperature oil well with altering groove water, and it is high that it in use exists cost, the most stifled rear difficulty
The series of malpractice such as process, application is less at present, and time special, its curing rate of thermosetting resin is very sensitive to temperature,
Poor controllability, and resistance to gentleness resistance to high salinity performance all can not meet steam and drive the requirement of profile control.
Foam class blocking agent plugging strength is low and under high-temperature and high-pressure conditions, steam penetrates readily through.
Therefore, the problem existed for above-mentioned profile control agent, it is provided that one can be applied to steam soak oil reservoir or commonly note
The water plugging profile control agent of water heavy crude reservoir becomes the technical problem that this area is urgently to be resolved hurrily.
Summary of the invention
For solving above-mentioned technical problem, it is an object of the invention to provide the profile control of a kind of high temperature resistant high salinity of slow degraded
Agent, this pumping into property of profile control agent ground gentleness good, resistance to resistance to high salinity performance is good, and shut-off capacity is strong, it is possible to be applied to steam
Vapour is handled up oil reservoir or common water filling heavy crude reservoir, and preparation cost is cheap and is difficult to pollute stratum.
For reaching above-mentioned purpose, the invention provides the profile control agent of a kind of high temperature resistant high salinity of slow degraded, with quality hundred
Proportion by subtraction meter, the raw material composition of described profile control agent includes:
In above-mentioned profile control agent, it is preferable that the fusing point of described melamine class monomer is at least 300 DEG C, decomposition temperature
At least 354 DEG C, the melamine class monomer meeting described fusing point and decomposition temperature requirement is used equally to the present invention；More
Preferably, described melamine class monomer includes tripolycyanamide and/or benzoguanamine, but is not limited to this.
The technical scheme that the present invention provides uses the melamine class monomer with high heat resistance and aldehyde and/or crow Lip river
Tropine carries out polycondensation reaction and generates melamine class monomer resin cross-linking agent, and it is high, cementing that this cross-linking agent has chemism
The advantages such as intensity is big, Heat stability is good, low-temperature setting ability is strong, anti-shear performance good, curing rate is fast.
In above-mentioned profile control agent, it is preferable that described aldehydes includes formaldehyde, but is not limited to this；In the skill that the present invention provides
In art scheme, in alkalescence or neutral medium, when the mol ratio of tripolycyanamide Yu formaldehyde is 1:(6-12) time, formaldehyde
The higher hexakis(hydroxymethyl)melamine class monomer of stability and other condensation polymer can be generated with melamine class monomer, increase
Add and crosslinked the methylol functional groups of reaction with N-[2-(2-methyl-4-oxopentyl), improve the heat resistance of gel and strong
Degree.
In above-mentioned profile control agent, it is preferable that described aldehydes and hexamethylenamine be originated from each of which aqueous solution (i.e.
Aldehydes solution and hexamethylenamine solution), the mass percent concentration of described aldehydes solution and hexamethylenamine solution is
37-40%, in use, by percentage to the quality, the addition of described aldehydes solution and/or hexamethylenamine solution is
1.5-12%.
In above-mentioned profile control agent, it is preferable that described plasticizer includes diallyl phthalate and/or isophthalic diformazan
Diallyl phthalate.
In the scheme that the present invention provides, plasticizer can react with N-[2-(2-methyl-4-oxopentyl), by diacetone acrylamide
Introduce in amide molecule structure with two allyloxys contained in resistant to elevated temperatures benzene ring structure monomer, with each molecule
Radical polymerisation, the high polymer intensity height of reaction generation, good toughness, Heat stability is good, can hold at a temperature of 150 DEG C
Continuous use, fully biodegradable after life-time service, will not endanger environment.
In the technical scheme that the present invention provides, melamine class monomer resin cross-linking agent is (by formaldehyde and melamine class
Monomer reaction generates) can crosslink be polymerized with high polymer (being reacted generation with N-[2-(2-methyl-4-oxopentyl) by plasticizer)
Synchronous reaction, it is possible to improve gelling strength and the heat resistance of profile control agent further.
In above-mentioned profile control agent, it is preferable that described initiator is persulfate；It is highly preferred that described initiator includes
Sodium peroxydisulfate, potassium peroxydisulfate or Ammonium persulfate..
In above-mentioned profile control agent, it is preferable that the heatproof temperature of described profile control agent is 250 DEG C.
In above-mentioned profile control agent, it is preferable that the resistance to salinity of described profile control agent is 23 × 104mg/L。
Present invention also offers the preparation method of a kind of above-mentioned profile control agent, it comprises the following steps:
(1) melamine class monomer, aldehydes and/or hexamethylenamine are added to the water, after stirring, form the first solution；
(2) in above-mentioned first solution, add N-[2-(2-methyl-4-oxopentyl), plasticizer and initiator, stirring, delayed
The profile control agent of high temperature resistant high salinity of degrading.
In above-mentioned preparation method, it is preferable that in step (1), the temperature of described water is at least 40 DEG C.
In above-mentioned preparation method, it is preferable that in step (1), mixing time is 20-30min；It is highly preferred that
Mixing speed is 50-200r/min.
In above-mentioned preparation method, it is preferable that in step (2), mixing time is 30min；It is highly preferred that
Mixing speed is 150r/min-1000r/min.
Beneficial effects of the present invention:
Compared with existing profile control agent, effective sealing ratiod of the profile control agent of the high temperature resistant high salinity of slow degraded that the present invention provides
Up to more than 87%, heatproof reaches 250 DEG C, and the use effect duration under the conditions of 150 DEG C was up to more than 6 months；Plastic
The viscosity of front profile control agent is 200-1000mPa.S, and plugging strength can be controlled in up to more than 25MPa/m, gelation time
In 8-48h, it is possible to realize the indepth plugging of oil reservoir.
The profile control agent that the present invention provides has good pumping into property, temperature tolerance, long-term effectiveness, and preparation is simple, cost
The feature such as cheap, and gelation time is adjustable, and shut-off capacity is strong, adapts to Oil Reservoir Types wide, is difficult to pollute stratum, energy
Enough entering earth formation deep, effectively solve steam soak oil reservoir steam entry profile uneven, between well, vapour is altered or common water filling viscous crude oil
Hide an intake profile unequal production difficult problem.
Detailed description of the invention
In order to the technical characteristic of the present invention, purpose and beneficial effect are more clearly understood from, the existing skill to the present invention
Art scheme carries out described further below, but it is not intended that to the present invention can the restriction of practical range.
Embodiment 1
Present embodiments provide the profile control agent of a kind of high temperature resistant high salinity of slow degraded, by percentage to the quality, this profile control
The raw material of agent consists of:
Tripolycyanamide: 4%；
Formalin: 12%；
N-[2-(2-methyl-4-oxopentyl): 2%；
Diallyl phthalate: 0.2%；
Sodium peroxydisulfate: 0.2%；
Surplus is Donghe oilfield in Tarim sewage, and temperature is 40 DEG C, and salinity is 23 × 104mg/L；
The mass percent concentration of above-mentioned formalin is 37-40%.
The concrete preparation process of this profile control agent is:
(1) tripolycyanamide, formalin are added sequentially in the oilfield sewage of 40 DEG C, are sufficiently stirred for dissolving
20-30min, mixing speed is 50-200r/min；
(2) in above-mentioned solution, it is sequentially added into N-[2-(2-methyl-4-oxopentyl), plasticizer, initiator, continues stirring 30min
After be the profile control agent of slow high temperature resistant high salinity of degrading.
Embodiment 2
Present embodiments provide the profile control agent of a kind of high temperature resistant high salinity of slow degraded, by percentage to the quality, this profile control
The raw material of agent consists of:
Benzoguanamine: 1%；
Hexamethylenamine solution: 1.5%；
N-[2-(2-methyl-4-oxopentyl): 0.5%；
DAIP: 0.05%；
Potassium peroxydisulfate: 0.05%；
Surplus is Donghe oilfield in Tarim sewage, and temperature is 40 DEG C, and salinity is 23 × 104mg/L；
The mass percent concentration of above-mentioned hexamethylenamine solution is 37-40%.
The concrete preparation process of this profile control agent is:
(1) tripolycyanamide, hexamethylenamine solution are added sequentially in the oilfield sewage of 40 DEG C, are sufficiently stirred for dissolving
20-30min, mixing speed is 50-200r/min；
(2) in above-mentioned solution, it is sequentially added into N-[2-(2-methyl-4-oxopentyl), plasticizer, initiator, continues stirring 30min
After be the profile control agent of slow high temperature resistant high salinity of degrading.
Slow degraded high temperature resistant high salinity profile control agent embodiment 2 provided carries out rock core single tube simulation experiment, investigates rock
Permeability variation situation (result is as shown in table 1) before and after the process of heart profile control agent.
The plugging strength performance of table 1 profile control agent
| Core numbers | Permeability × 10 before stifled-3μm2 | Permeability × 10 after stifled-3μm2 | Plugging rate % |
| 1 | 874.2 | 90.5 | 89.6 |
| 2 | 765.8 | 86.2 | 88.7 |
| 3 | 915.4 | 115.4 | 87.4 |
Showing from the result of table 1, the profile control agent of the high temperature resistant high salinity of slow degraded that the present invention provides has the strongest ground
Layer shut-off capacity, effective sealing ratiod is up to more than 87%, and the sealing ratiod of currently used profile control agent is 75%-80%,
The profile control agent effect that the visible present invention provides is ideal.
Embodiment 3
Present embodiments provide the profile control agent of a kind of high temperature resistant high salinity of slow degraded, by percentage to the quality, this profile control
The raw material of agent consists of:
Tripolycyanamide: 2%；
Hexamethylenamine solution: 6%；
N-[2-(2-methyl-4-oxopentyl): 1%；
DAIP: 0.1%；
Potassium peroxydisulfate: 0.1%；
Surplus is Donghe oilfield in Tarim sewage, and temperature is 40 DEG C, and salinity is 23 × 104mg/L；
The mass percent concentration of above-mentioned hexamethylenamine solution is 37-40%.
The concrete preparation process of this profile control agent is:
(1) tripolycyanamide, hexamethylenamine solution are added sequentially in the oilfield sewage of 40 DEG C, are sufficiently stirred for dissolving
20-30min, mixing speed is 50-200r/min；
(2) in above-mentioned solution, N-[2-(2-methyl-4-oxopentyl), plasticizer, initiator it are sequentially added into；
(3) profile control agent of slow high temperature resistant high salinity of degrading it is after continuing stirring 30min.
The profile control agent of the high temperature resistant high salinity of slow degraded that embodiment 3 provides is carried out rock core single tube simulation experiment, investigates
It is to stratum plugging strength (result is as shown in table 2).
The plugging strength of gel can describe with breakthrough pressure, and concrete mensuration program is as follows:
1. rock core saturation water；
2. the blocking agent of a certain amount of (1.5PV) is injected with certain flow (25mL/min), outside testing process is for adding
Press, have the old process of water bath with thermostatic control；
3. the rock core injecting blocking agent is placed in hermetic container, the water bath with thermostatic control of 60 DEG C is placed 24h；
4. 60 DEG C, under conditions of 0.7MPa, with certain flow (50mL/min) water filling, until rock core clamping
The device port of export flows down the first drop of liquid and constantly has liquid to flow out later, and now the manometric reading of entrance point is blocking agent
Breakthrough pressure Pt。
The plugging strength of table 2 profile control agent
| Core numbers | Length (cm) | Inject blocking agent (VP) | Fluid pressure (MPa) | Breakthrough pressure (MPa/m) |
| 4 | 4.9 | 1.5 | 1.26 | 25.7 |
| 5 | 5.2 | 1.5 | 1.32 | 25.4 |
From Table 2, it can be seen that the present invention provide the high temperature resistant high salinity of slow degraded profile control agent plugging strength up to
More than 25MPa/m, and the plugging strength of profile control agent is only 14-20MPa/m at present, it is seen that the profile control agent that the present invention provides
There is the highest shut-off capacity, be fully able to meet steam and drive plugging strength requirement.
Embodiment 4
Present embodiments provide the profile control agent of a kind of high temperature resistant high salinity of slow degraded, by percentage to the quality, this profile control
The raw material of agent consists of:
Benzoguanamine: 4%；
Formalin: 12%；
N-[2-(2-methyl-4-oxopentyl): 2%；
Diallyl phthalate: 0.2%；
Sodium peroxydisulfate: 0.2%；
Surplus is Donghe oilfield in Tarim sewage, and temperature is 40 DEG C, and salinity is 23 × 104mg/L；
The mass percent concentration of above-mentioned formalin is 37-40%.
The concrete preparation process of this profile control agent is:
(1) tripolycyanamide, formalin are added sequentially in the oilfield sewage of 40 DEG C, are sufficiently stirred for dissolving
20-30min, mixing speed is 50-200r/min；
(2) in above-mentioned solution, it is sequentially added into N-[2-(2-methyl-4-oxopentyl), plasticizer, initiator, continues stirring 30min
After be the profile control agent of slow high temperature resistant high salinity of degrading.
Table 3 profile control agent heat resistance is tested
| Temperature, DEG C | 100 | 150 | 200 | 250 | 300 |
| State | Solid | Solid | Solid | A small amount of aquation | Aquation |
| Weight-loss ratio (%) | 0 | 5.5 | 13.9 | 18.7 | 64.3 |
After profile control agent embodiment 4 provided condenses for static 24 hours completely, the test that it carries out heat resistance is real
Test, specifically follow the steps below:
The profile control agent of the high temperature resistant high salinity of slow degraded condensed is positioned in calorstat, every 24 hours, regulation
Calorstat temperature, tests its heat resistance, and the high-temperature circulation test result of this profile control agent is as shown in table 3.
The test result of table 3 shows: the profile control agent of the high temperature resistant high salinity of slow degraded that the present invention provides is at 250 DEG C of bars
Under part, still being able to keep weight-loss ratio below 20%, be dehydrated the most completely, this shows that the profile control agent that the present invention provides can
Bearing washing away of 250 DEG C of steam, its heat resistance is excellent；Along with the rising of temperature, this profile control agent weight-loss ratio increases,
When temperature is more than 300 DEG C, profile control agent structure changes, and profile control agent aquation is the most serious.
Embodiment 5
Present embodiments provide the profile control agent of a kind of high temperature resistant high salinity of slow degraded, by percentage to the quality, this profile control
The raw material composition of agent includes:
Tripolycyanamide: 3%；
Hexamethylenamine solution: 8%；
N-[2-(2-methyl-4-oxopentyl): 1.2%；
Diallyl phthalate: 0.15%；
Potassium peroxydisulfate: 0.15%；
Surplus is Donghe oilfield in Tarim sewage, 40 DEG C, salinity 23 × 104mg/L；
The mass percent concentration of above-mentioned hexamethylenamine solution is 37-40%.
The concrete preparation process of this profile control agent is:
(1) tripolycyanamide, hexamethylenamine are added sequentially in more than 40 DEG C oilfield sewages, are sufficiently stirred for dissolving
20-30min, mixing speed 50-200r/min；
(2) in above-mentioned solution, N-[2-(2-methyl-4-oxopentyl), plasticizer, initiator it are sequentially added into；
(3) profile control agent of slow high temperature resistant high salinity of degrading it is after continuing stirring 30min.
Profile control agent embodiment 5 provided carries out high-temperature long term stability experiment, and it is long to profile control agent that table 4 reflects high temperature
The impact of phase stability.
The stability of profile control agent under table 4 hot conditions
Note: experimental temperature is 150 DEG C, salinity is 23 × 104mg/L。
As can be seen from Table 4, the profile control agent of the high temperature resistant high salinity of slow degraded that the present invention provides at 150 DEG C, ore deposit
Change degree is 23 × 104Under the conditions of mg/L, it is possible to keep stronger shut-off capacity to reach more than 6 months, illustrate that the present invention carries
The profile control agent resistance to elevated temperatures of confession is good, under Donghe oilfield in Tarim ground environment, it is possible to gradually degrade.
Embodiment 6
The profile control agent that embodiment 5 provides has been carried out single tube model core experiment by the present embodiment, investigates its resistance to steam flush
Performance.
Experiment parameter: core length: 5.8cm；Drill core permeability rate: 1152 × 10-3μm2；Pore volume: 11.6cm3；
Inject quality of steam: 12g (10PV)；Implantation temperature: 200 DEG C；Inject flow: 2g/min.
Experimental result is as shown in table 5.
Table 5 fireflood envelope alters agent face resistance to steam flush performance
| The steam injection time, min | 5 | 10 | 20 | 30 | 40 | 50 | 60 |
| Sealing ratiod, % | 90.2 | 89.3 | 87.2 | 82.1 | 78.4 | 75.1 | 72.8 |
Test result indicate that of table 5, the profile control agent that the present invention is supplied to, along with the prolongation of steam flush time, becomes cementing
Structure is gradually destroyed, and eventually forms aqueous solution and is discharged；When the vapour volume injected is 10PV, profile control agent is to rock
The sealing ratiod of the heart is maintained at more than 70%, illustrates that the profile control agent that the present invention provides has stronger resistance to steam flush ability,
Meanwhile, the experimental result of table 5 also illustrates that the profile control agent that the present invention provides can effectively be degraded under high temperature action, recovers
The permeability on stratum, will not pollute stratum.
Claims (10)
1. a profile control agent for slow high temperature resistant high salinity of degrading, by percentage to the quality, the raw material of described profile control agent
Composition includes:
Profile control agent the most according to claim 1, wherein: the fusing point of described melamine class monomer is at least 300
DEG C, decomposition temperature is at least 354 DEG C；
Preferably, described melamine class monomer includes tripolycyanamide and/or benzoguanamine.
Profile control agent the most according to claim 1 and 2, wherein: described aldehydes includes formaldehyde.
4. according to the profile control agent described in any one of claim 1-3, wherein: described plasticizer includes phthalic acid
Diallyl and/or DAIP.
5. according to the profile control agent described in any one of claim 1-4, wherein: described initiator is persulfate；
Preferably, described initiator includes sodium peroxydisulfate, potassium peroxydisulfate or Ammonium persulfate..
6. according to the profile control agent described in any one of claim 1-5, wherein: the heatproof temperature of described profile control agent is 250
℃；
Preferably, resistance to salinity is 23 × 104mg/L。
7. the preparation method of the profile control agent described in any one of claim 1-6, it comprises the following steps:
(1) melamine class monomer, aldehydes and/or hexamethylenamine are added to the water, after stirring, form the first solution；
(2) in above-mentioned first solution, add N-[2-(2-methyl-4-oxopentyl), plasticizer and initiator, stirring, delayed
The profile control agent of high temperature resistant high salinity of degrading.
Method the most according to claim 7, wherein: in step (1), the temperature of described water is at least
40℃。
Method the most according to claim 7, wherein: in step (1), mixing time is 20-30min；
Preferably, mixing speed is 50-200r/min.
Method the most according to claim 7, wherein: in step (2), mixing time is 20-40min,
It is preferably 30min；
It is highly preferred that mixing speed is 150r/min-1000r/min.
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