CN104861110B - Thief zone heavy crude reservoir is prevented swollen pressing down sand agent and preparation method thereof - Google Patents
Thief zone heavy crude reservoir is prevented swollen pressing down sand agent and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of Thief zone heavy crude reservoir to prevent swollen pressing down sand agent, acrylamide by 10%～35% or 2 acrylamide 2 methyl propane sulfonic acid salt, 1%～the styrene of 5% of Methacrylamide, 5%～25% or the acrylyl oxy-ethyl-trimethyl salmiac of acrylonitrile, 5%～20% or trimethylallylammonium chloride and water are prepared from；Present invention also offers and a kind of the monomer configured in proportion be simultaneously introduced in reactor and use catalysis method, heating using microwave and ultra violet lamp successively so that Thief zone heavy crude reservoir prevents that the swollen sand agent function monomer that presses down occurs the Thief zone heavy crude reservoir that is all polymerized to prevent the swollen preparation method pressing down sand agent；This Thief zone heavy crude reservoir is prevented swollen pressing down sand agent and being applicable to the middle and high infiltration heavy crude reservoir of 70 DEG C～120 DEG C, anti-clay swelling, suppression sand migration are respond well, not only can suppress reservoir clay swelling and suppression reservoir sand dispersion, migration, and can effectively stop stratum medium-fine sand and Extra-fine sand to flow into pit shaft.
Description
Technical field
The invention belongs to oil drilling product technical field, particularly to a kind of Thief zone heavy crude reservoir prevent swollen press down sand agent and
Its preparation method.
Background technology
Along with loose sand oil accumulation exploitation progressively, stratum medium-fine sand and Extra-fine sand migration degree are gradually increased, in large quantities
Layer sand flow enters pit shaft, thus blocks throat, reduces reservoir permeability, even sand and buries pit shaft, causes oil well to stop production, meanwhile,
Many Clay Mineral content are high, and improper measures will cause swelling clay mineral, and disperse and migrate on stream, cause
Reservoir damage, causes permeability decrease.In some middle and high infiltration heavy crude reservoirs, these problems are particularly evident.
For loose sand oil accumulation and HEAVY OIL RESERVOIR, both at home and abroad main employing anti-swollen presses down sand agent to prevent reservoir clay
Expand and suppression reservoir sand dispersion, migration.Anti-swollen press down sand agent and can effectively control clay swell under conditions of low cost
And particle migration, it is ensured that the long term stable production of oil well, meanwhile, anti-swollen press down sand agent and can coordinate extension sand screen sand control technique, circulation gravel
Stone filling technique and FRACTURING SAND CONTROL TECHNOLOGY etc. use simultaneously, reach the effect of deep sand firming, it is also possible to be combined with de-plugging process, reach
Effect to the steady sand of de-plugging.
Conventional anti-swollen press down sand agent and can be divided into and inorganic anti-swollen press down sand agent and organic prevent swollen pressing down sand agent.Inorganic anti-swollen press down sand agent bag
Include salt and inorganic cation type polymer；Organic anti-swollen press down sand agent and include cationic surface active agent and organic cation type
Polymer, organic anti-swollen press down sand agent anti-swollen to press down sand effect preferable.Organic cation type polymer mainly includes two kinds of structures: one
Kind be quaternary ammonium structure on main chain, this structure anti-swollen presses down that sand agent carried charge is big, relative molecular mass is little, prevents swollen pressing down sand mechanism
Based on neutralize electrically, bridge act as auxiliary；Another kind be quaternary ammonium structure on side chain, it is charged that this structure anti-swollen presses down sand agent
Measuring little, relative molecular mass big, the anti-swollen sand mechanism that presses down act as main with bridge joint, and it is electrically auxiliary for neutralizing.At present, independent research is novel
Anti-swollen press down sand agent and can realize large-scale production, reduce construction cost, form my company's characteristic and prevent the swollen sand technology and relevant of pressing down
Composite sand prevention technology, makes me company's competitiveness in horizontal well sand control market be greatly improved.
Summary of the invention
It is an object of the invention to provide one and can not only suppress reservoir clay swelling and suppression reservoir sand dispersion, migration,
And can effectively stop stratum medium-fine sand and Extra-fine sand to flow into pit shaft, the Thief zone heavy crude reservoir reducing the probability blocking pore throat is prevented swollen
Press down sand agent.
Present invention also offers and a kind of the monomer configured in proportion be simultaneously introduced in reactor and use catalysis successively
Method, heating using microwave and ultra violet lamp are so that function monomer occurs the Thief zone heavy crude reservoir being all polymerized to prevent the swollen preparation pressing down sand agent
Method.
To achieve these goals, Thief zone heavy crude reservoir of the present invention is prevented swollen pressing down sand agent, by following mass fraction
Raw material is made:
Wherein, described first monomer is acrylamide or Methacrylamide, and described second comonomer is 2-acrylamide-2-
Methyl propane sulfonic acid salt, Third monomer is styrene or acrylonitrile, and described 4th monomer is acrylyl oxy-ethyl-trimethyl chlorination
Ammonium or trimethylallylammonium chloride.
The chemical constitution of described first monomer, second comonomer, Third monomer and the 4th monomer is as follows:
This Thief zone heavy crude reservoir prevents the swollen preparation method pressing down sand agent, comprises the steps:
(1) in reactor, second comonomer and Third monomer it are initially charged, after stirring 10～20min is completely dissolved to solid,
Adding the first monomer and the 4th monomer again in reactor, stirring is completely dissolved to solid, obtains mixed reaction solution (I)；
(2) adjustment mixed reaction solution (I) solution ph is to 8～9, and in control reactor, solution temperature is 10～15 DEG C, lazy
Property gas shield under, in reactor add oxidation-reducting system initiator, in every liter of mixed reaction solution add 0.04-0.08g
Initiator, causes mixed reaction solution generation polymerisation 15～20min, obtains mixed reaction solution (II)；
(3) temperature of the mixed reaction solution (II) obtained through step (2) is increased to room temperature (25～30 DEG C), uses microwave
Method 500W heating 2～3min makes to be mixed uniformly, then mixed reaction solution (II) is placed under ultraviolet radiation instrument in 350～
400nm light radiation 30min～1h, stops irradiating follow-up continuation of insurance temperature 4 hours, and reaction terminates, and obtains gel piece shaped polymer；
(4) carry out the gel piece shaped polymer that step (3) obtains purifying, dry, granulation, i.e. obtain anti-swollen pressing down sand agent and producing
Product.
Wherein, the microwave in described step (2) and ultraviolet light irradiation process need not strict starvation state, less
Amount oxygen does not interferes with reaction to be carried out, but is not preferably having other light (such as daylight, light etc.) in ultraviolet light irradiation process
Carry out under irradiating state.
Described step (2) adds NaOH solution to mixed reaction solution (I) and adjusts solution ph to 8～9.Described NaOH is molten
Liquid is preferably the low concentration NaOH solution of 0.2～2mol/L.
Preferably, in described step (2), oxidation-reducting system initiator is sodium hydrogensulfite-potassium peroxydisulfate initiator,
Described sodium hydrogensulfite addition is to add 0.04～0.08g in every liter of mixed reaction solution, and described potassium peroxydisulfate addition is every
Rise and mixed reaction solution adds 0.04～0.08g.
In described step (4), method of purification is that at the industrial alcohol of 95wt%, described gel piece shaped polymer is soaked half is little
Time and drip washing repeatedly.Described ethanol is the industrial alcohol of 95wt%.
Drying condition in described step (4) is 100 DEG C, removes the water in described polymer and ethanol.
The described anti-swollen sand agent product cut size that presses down is 30～50 mesh.
This Thief zone heavy crude reservoir prevent swollen press down sand agent use the monomer configured in proportion is simultaneously introduced in reactor also
The method using catalysis method, heating using microwave and ultra violet lamp successively, makes function monomer occur equal polymerisation to be prepared from.Adopt
By the method by microwave and the electromagnetic wave of the different wave length of ultraviolet transmitting and light wave, in order to excite, there is the most poly-different rate
Double bond monomer, has reached the purpose of function monomer homogeneous polymerization, increases productivity while improving reaction speed.
This Thief zone heavy crude reservoir is white powder with the anti-swollen sand agent product that presses down, and the aqueous solution is colourless transparent solution.Room temperature
Under, viscosity is 10～20mp.s；PH value is about 6.8, solubility 60g/100mL.
When usage amount is 0.3%～1%, anti-clay swelling, suppression sand migration are respond well, therefore, and can be as height
Infiltration heavy crude reservoir uses, not only can suppress reservoir clay swelling and suppression reservoir sand dispersion, migration, and effectively can stop ground
Layer medium-fine sand and Extra-fine sand flow into pit shaft, and wherein this Thief zone heavy crude reservoir prevents that the swollen most preferably amount of pumping into pressing down sand agent is 0.5wt%.
Compared with prior art, this Thief zone heavy crude reservoir is prevented swollen pressing down sand agent and being applicable to the middle and high infiltration of 70 DEG C～120 DEG C
Heavy crude reservoir, anti-clay swelling, suppression sand migration are respond well, and reservoir clay swelling and suppression reservoir sand not only can be suppressed to divide
Dissipate, migrate, and can effectively stop stratum medium-fine sand and Extra-fine sand to flow into pit shaft；This Thief zone heavy crude reservoir prevents that swollen to press down sand agent optimal
Pumping into concentration is 0.5wt%, when pump into 0.5wt% prevent swollen press down sand agent solution time, after 12h, when sand production rate is not pump into 4%～
7.2%, anti-swollen press down sand agent press down grittiness energy≤40mg/h；When pump into 0.5wt% concentration anti-swollen press down sand agent solution time, this prevents swollen
Press down anti-dilative >=90% of sand agent.
Accompanying drawing explanation
Fig. 1 is that the Thief zone heavy crude reservoir of the present invention is prevented swollen pressing down sand agent synthetic method schematic diagram；
Fig. 2 be the Thief zone heavy crude reservoir to the present invention prevent swollen press down sand agent press down sand performance test is stablized sand washing experiment
Device.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the foregoing invention content of the present invention is described in further detail.But should be by
This is interpreted as that the scope of the above-mentioned theme of the present invention is only limitted to following embodiment.Without departing from the present invention above-mentioned technological thought situation
Under, according to ordinary skill knowledge and customary means, make various replacement and change, the scope of the present invention all should be included in
In.
In example 1 below～4, described microwave method uses micro-wave oven to realize, and the operating power of described micro-wave oven is
500W, the working time 2～3min；Described ultraviolet radiation instrument is for using Asia and Europe, Beijing De Peng Science and Technology Ltd. DP-MUA165
Type ultraviolet radiation instrument.
Embodiment 1
Each monomer with the percentage by weight of water is: Methacrylamide: 2-acrylamide-2-methyl propane sulfonic acid salt: benzene
Ethene: acrylyl oxy-ethyl-trimethyl salmiac: water=25:10:5:7:53.
In 2000mL beaker, add distilled water 530g, add 2-acrylamide-2-methyl propane sulfonic acid salt 100g and benzene
Ethene 50g, stirring is all dissolved to solid, adds Methacrylamide 250g and acrylyl oxy-ethyl-trimethyl salmiac
70g, continues to stir to being completely dissolved, obtains mixed reaction solution (I)；The pH of mixed reaction solution (I) is regulated with sodium hydroxide solution
Value is adjusted to pH=8, and to control solution temperature be 10～15 DEG C；30 minutes nitrogen deoxygenation gas of top blast, adds potassium peroxydisulfate 0.07g/
L, sodium hydrogensulfite 0.07g/L, induction produce free radical in 20 minutes, if seeing that temperature raises, then are considered as causing successfully, otherwise
Need to add initiator again to cause；Temperature is increased to room temperature, is mixed all with microwave method moderate heat (500W) heating 2min
Even, then take out, irradiate with ultraviolet radiation instrument and be placed in 30min under 365nm light radiative state, stop irradiating follow-up continuation of insurance temperature 4
Hour, obtain gel piece shaped polymer；Carry out the colloid being polymerized purifying, dry, granulation, be crushed to 30～50 mesh, i.e.
Obtain this Thief zone heavy crude reservoir to prevent swollen pressing down sand agent.
Embodiment 2
Each monomer with the percentage by weight of water is: Methacrylamide: 2-acrylamide-2-methyl propane sulfonic acid salt: third
Alkene nitrile: acrylyl oxy-ethyl-trimethyl salmiac: water=30:12:2:10:46.
In 2000mL beaker, add distilled water 460g, add 2-acrylamide-2-methyl propane sulfonic acid salt 120g and third
Alkene nitrile 20g, stirring is all dissolved to solid, adds Methacrylamide 300g and acrylyl oxy-ethyl-trimethyl salmiac
100g, continues to stir to being completely dissolved, obtains mixed reaction solution (I)；The pH of mixed reaction solution (I) is regulated with sodium hydroxide solution
Value is adjusted to pH=8.5, and to control solution temperature be 10～15 DEG C；30 minutes nitrogen deoxygenation gas of top blast, adds potassium peroxydisulfate
0.04g/L, sodium hydrogensulfite 0.04g/L, induction produce free radical in 20 minutes, if seeing that temperature raises, then are considered as causing into
Merit, otherwise needs to add initiator and again causes；Temperature is increased to room temperature, with microwave method moderate heat (500W) heating 2min by it
Mix, then take out, irradiate with ultraviolet radiation instrument and be placed in 30min under 365nm light radiative state, continue after stopping irradiating
It is incubated 4 hours, obtains gel piece shaped polymer；Carry out the colloid being polymerized purifying, dry, granulation, be crushed to 30～50
Mesh, i.e. obtains this Thief zone heavy crude reservoir and prevents swollen pressing down sand agent.
Embodiment 3
Each monomer with the percentage by weight of water is: acrylamide: 2-acrylamide-2-methyl propane sulfonic acid salt: styrene:
Trimethylallylammonium chloride: water=20:15:3:12:50.
In 2000mL beaker, add distilled water 500g, add 2-acrylamide-2-methyl propane sulfonic acid salt 150g and benzene
Ethene 30g, stirring is all dissolved to solid, adds acrylamide 200g and trimethylallylammonium chloride 120g, continues to stir
Mix to being completely dissolved, obtain mixed reaction solution (I)；The pH value regulating mixed reaction solution (I) with sodium hydroxide solution is adjusted to pH=
9, and to control solution temperature be 15 DEG C；30 minutes nitrogen deoxygenation gas of top blast, adds potassium peroxydisulfate 0.06g/L, sodium hydrogensulfite
0.06g/L, induction produce free radical in 20 minutes, if seeing that temperature raises, then are considered as causing successfully, otherwise need to add and cause
Agent causes again；Temperature is increased to room temperature, is mixed uniformly with microwave method moderate heat (500W) heating 3min, then takes out,
Irradiate with ultraviolet radiation instrument and be placed in 1h under 365nm light radiative state, stop irradiating follow-up continuation of insurance temperature 4 hours, obtain gel piece
Shaped polymer；Carry out the colloid being polymerized purifying, dry, granulation, be crushed to 30～50 mesh, i.e. obtain this Thief zone viscous crude
Oil reservoir is prevented swollen pressing down sand agent.
Embodiment 4
Each monomer with the percentage by weight of water is: acrylamide: 2-acrylamide-2-methyl propane sulfonic acid salt: acrylonitrile:
Trimethylallylammonium chloride: water=15:20:5:5:55.
In 2000mL beaker, add distilled water 550g, add 2-acrylamide-2-methyl propane sulfonic acid salt 200g and third
Alkene nitrile 50g, stirring is all dissolved to solid, adds acrylamide 150g and trimethylallylammonium chloride 50g, continues stirring
To being completely dissolved, obtain mixed reaction solution (I)；The pH value regulating mixed reaction solution (I) with sodium hydroxide solution is adjusted to pH=9,
And to control solution temperature be 10 DEG C；30 minutes nitrogen deoxygenation gas of top blast, adds potassium peroxydisulfate 0.08g/L, sodium hydrogensulfite
0.07g/L, induction produce free radical in 20 minutes, if seeing that temperature raises, then are considered as causing successfully, otherwise need to add and cause
Agent causes again；Temperature is increased to room temperature, is mixed uniformly with microwave method moderate heat (500W) heating 3min, then takes out,
Irradiate with ultraviolet radiation instrument and be placed in 1h under 365nm light radiative state, stop irradiating follow-up continuation of insurance temperature 4 hours, obtain gel piece
Shaped polymer；Carry out the colloid being polymerized purifying, dry, granulation, be crushed to 30～50 mesh, i.e. obtain this Thief zone viscous crude
Oil reservoir is prevented swollen pressing down sand agent.
Embodiment 5
Each monomer with the percentage by weight of water is: Methacrylamide: 2-acrylamide-2-methyl propane sulfonic acid salt: third
Alkene nitrile: trimethylallylammonium chloride: water=12:23:1:17:47.
In 2000mL beaker, add distilled water 470g, add 2-acrylamide-2-methyl propane sulfonic acid salt 230g and third
Alkene nitrile 10g, stirring is all dissolved to solid, adds Methacrylamide 120g and trimethylallylammonium chloride 170g, continues
Continuous stirring, to being completely dissolved, obtains mixed reaction solution (I)；The pH value regulating mixed reaction solution (I) with sodium hydroxide solution is adjusted to
PH=8, and to control solution temperature be 15 DEG C；30 minutes nitrogen deoxygenation gas of top blast, adds potassium peroxydisulfate 0.04g/L, bisulfite
Sodium 0.05g/L, induction produce free radical in 20 minutes, if seeing that temperature raises, then being considered as causing successfully, otherwise needing addition to draw
Send out agent again to cause；Temperature is increased to room temperature, is mixed uniformly with microwave method moderate heat (500W) heating 3min, then takes
Go out, irradiate with ultraviolet radiation instrument and be placed in 50min under 365nm light radiative state, stop irradiating follow-up continuation of insurance temperature 4 hours, obtain
Gel piece shaped polymer；Carry out the colloid being polymerized purifying, dry, granulation, be crushed to 30～50 mesh, i.e. obtain Thief zone
Heavy crude reservoir is prevented swollen pressing down sand agent.
Embodiment 6
Each monomer with the percentage by weight of water is: acrylamide: 2-acrylamide-2-methyl propane sulfonic acid salt: styrene:
Acrylyl oxy-ethyl-trimethyl salmiac: water=20:5:5:20:50.
In 2000mL beaker, add distilled water 500g, add 2-acrylamide-2-methyl propane sulfonic acid salt 50g and benzene second
Alkene 50g, stirring is all dissolved to solid, adds acrylamide 200g and acrylyl oxy-ethyl-trimethyl salmiac 200g, continues
Continuous stirring, to being completely dissolved, obtains mixed reaction solution (I)；The pH value regulating mixed reaction solution (I) with sodium hydroxide solution is adjusted to
PH=9, and to control solution temperature be 15 DEG C；30 minutes nitrogen deoxygenation gas of top blast, adds potassium peroxydisulfate 0.05g/L, bisulfite
Sodium 0.05g/L, induction produce free radical in 20 minutes, if seeing that temperature raises, then being considered as causing successfully, otherwise needing addition to draw
Send out agent again to cause；Temperature is increased to room temperature, is mixed uniformly, then with microwave method moderate heat heating (500W) heating 2min
Take out, irradiate with ultraviolet radiation instrument and be placed in 30min under 365nm light radiative state, stop irradiating follow-up continuation of insurance temperature 4 hours,
To gel piece shaped polymer；Carry out the colloid being polymerized purifying, dry, granulation, be crushed to 30～50 mesh, i.e. obtain height and ooze
Thoroughly heavy crude reservoir is prevented swollen pressing down sand agent.
Performance test:
The Thief zone heavy crude reservoir of embodiment 1～6 preparation swollen press down sand agent and is white powder with preventing；Under room temperature, have one
Fixed viscosity, its viscosity number is 10～20mpa.s；It is dissolved in water is colourless transparent solution, and pH value is about 6.8, and solubility is
60g/100mL。
(1) anti-swollen performance test
According to anti-dilative in existing Bohai Sea probing company standard Q/SYBHZ 0803-2009 " Bohai Sea probing expansion-resisting agent "
Detection method, uses centrifugal determination anti-dilative, i.e. swollen by measuring bentonite in powder volume in clay expansion-resisting agent solution and water
Swollen increment evaluates anti-dilative.
When this Thief zone heavy crude reservoir prevent swollen press down sand agent addition in bentonite be 0.5wt% time, its preventive effect of expansion
Preferably, anti-dilative is high, and therefore this Thief zone heavy crude reservoir prevents that the swollen sand agent dosage that presses down is advisable with 0.5wt%.
The computing formula of anti-dilative is:
In formula: B anti-clayswelling rate, %；
V0Bentonite volume in kerosene, mL；
V1Bentonite volume in clay stabilization agent solution, mL；
V2Bentonite volume in water, mL.
Thief zone heavy crude reservoir prepared in embodiment 1～6 prevents the swollen anti-expansion rate test data such as table 1 below institute pressing down sand
Show:
Table 1 anti-expansion rate test data
Test result indicate that, this Thief zone heavy crude reservoir prepared by the present invention is prevented swollen pressing down the bar that sand agent is at 70～120 DEG C
Under part, the anti-swollen anti-expansion pressing down sand agent all can reach more than 90%, has good anti-expansion character.
(2) sand performance test is pressed down
Method of testing: to fill out sand tube back-up sand (one end adds 0.076mm screen cloth, from the other end, quartz sand is loaded transfusion bottle).
Start micro pump, pump into this Thief zone heavy crude reservoir of 0.5wt% and prevent swollen pressing down sand solution (injection rate is 1mL/min), at 70 DEG C
Constant temperature 24h, pumps into formation water from the screen cloth one end that has of fill out sand tube by certain flow, measures the flow value started when substantially shaking out,
This value is to press down the flow that initially shakes out of sand agent, stablizes sand washing experimental result as shown in table 2 below.
Table 2: stablize sand washing test data of experiment
From the data in table 2, it can be seen that pump into this Thief zone heavy crude reservoir prevent swollen press down sand agent process after, go out reservoir sand sand grains fortune
Shifting degree be untreated before 4.04%～7.2%, illustrate this Thief zone heavy crude reservoir prevent swollen press down sand agent to press down sand respond well.
(3) core damage performance evaluation
Method of testing: take 3 blocks of rock cores that washing oil, the desalinization of soil by flooding or leaching have processed and do parallel laboratory test.First every block of rock core is tested with kerosene
Original permeability, then select embodiment 3 preparation anti-swollen press down sand agent prepare the aqueous solution rock core is polluted, re-test
Core permeability after pollution, evaluates its core damage by the ratio of permeability before and after polluting.
Anti-swollen pressing down after sand agent carries out the construction such as acidifying for ensure synthesis, target zone still has good permeability, to preventing
The swollen sand agent addition that presses down when being 0.5%wt, carries out core damage evaluation, and result is such as table 3 below, shown in 4.
During 3:70 DEG C of table, the anti-swollen of concentration 0.5% presses down sand agent core damage evaluation result
During 4:120 DEG C of table, the anti-swollen of 0.5%wt presses down sand agent core damage evaluation result
By table it can be seen that 70 DEG C, at a temperature of 120 DEG C, this prevents that swollen to press down sand agent relatively low to core permeability injury rate,
Three parallel laboratory test results of different temperatures are respectively less than 10%.Use this product to construct, in-place permeability conservation rate up to
More than 90%, illustrate that this product is the least to formation damage.
In sum, this Thief zone heavy crude reservoir prevent swollen press down the anti-clay swelling of sand, suppression sand migration respond well, because of
This, can use as in Thief zone heavy crude reservoir, not only can suppress reservoir clay swelling and suppression reservoir sand dispersion, migration, and
Stratum medium-fine sand and Extra-fine sand can be effectively stoped to flow into pit shaft.
Claims (7)
1. a Thief zone heavy crude reservoir prevents the swollen preparation method pressing down sand agent, it is characterised in that comprise the steps:
(1) being initially charged water in reactor, then add second comonomer and Third monomer, stirring 10～20min is complete to solid
After dissolving, then adding the first monomer and the 4th monomer in reactor, stirring is completely dissolved to solid, obtains mixed reaction solution
(I)；Wherein, described first monomer is acrylamide or Methacrylamide；Described second comonomer is 2-acrylamide-2-methyl
Propane sulfonate；Third monomer is styrene or acrylonitrile；Described 4th monomer be acrylyl oxy-ethyl-trimethyl salmiac or
Trimethylallylammonium chloride；In mixed reaction solution (I), by weight percentage, the first content of monomer is 10-35%, second
Content of monomer is 5-25%, and Third monomer content is 1-5%, and the 4th content of monomer is 5-20%, and surplus is water；
(2) adjustment mixed reaction solution (I) solution ph is to 8～9, and in control reactor, solution temperature is 10～15 DEG C, indifferent gas
Under body protection, in reactor, add oxidation-reducting system initiator, the initiator of every liter of mixed reaction solution addition aoxidizes
Agent, reducing agent are 0.04-0.08g, cause mixed reaction solution generation polymerisation 15～20min, obtain mixed reaction solution
(II)；
(3) temperature of the mixed reaction solution (II) obtained through step (2) is increased to room temperature, use microwave method 500W heating 2～
3min makes to be mixed uniformly, then mixed reaction solution is placed under ultraviolet radiation instrument in 350～400nm light radiation 30min～
1h, stops irradiating follow-up continuation of insurance temperature 4 hours, and reaction terminates, and obtains gel piece shaped polymer；
(4) carry out the gel piece shaped polymer that step (3) obtains purifying, dry, granulation, i.e. obtain anti-swollen pressing down sand agent product.
Thief zone heavy crude reservoir the most according to claim 1 prevents the swollen preparation method pressing down sand agent, it is characterised in that described step
Suddenly (2) add NaOH solution to mixed reaction solution (I) and adjust solution ph to 8～9.
Thief zone heavy crude reservoir the most according to claim 1 prevents the swollen preparation method pressing down sand agent, it is characterised in that described step
Suddenly in (2), oxidation-reducting system initiator is sodium hydrogensulfite-potassium peroxydisulfate initiator.
Thief zone heavy crude reservoir the most according to claim 1 prevents the swollen preparation method pressing down sand agent, it is characterised in that described step
Suddenly in (4), method of purification is by described gel piece shaped polymer in alcohol immersion half an hour of 95wt% drip washing repeatedly.
Thief zone heavy crude reservoir the most according to claim 4 prevents the swollen preparation method pressing down sand agent, it is characterised in that described step
Suddenly the drying condition in (4) is 100 DEG C, removes the aqueous solvent in described polymer and ethanol.
Thief zone heavy crude reservoir the most according to claim 1 prevents the swollen preparation method pressing down sand agent, it is characterised in that described step
Suddenly described in (4), the anti-swollen sand agent product particle diameter after granulation that presses down is 30～50 mesh.
7. the Thief zone heavy crude reservoir as described in any one of claim 1～6 prevents what the swollen preparation method pressing down sand agent prepared
Thief zone heavy crude reservoir is prevented swollen pressing down sand agent.
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| CN106753283B (en) * | 2016-12-12 | 2018-02-02 | 李军宁 | Compositional type oil reservoir prevents swollen suppression sand agent and preparation method thereof |
| CN111607375B (en) * | 2020-06-16 | 2022-09-23 | 胜利油田凯渡石油技术开发有限公司 | Anti-swelling shrinkage and expansion-shrinkage agent for low-permeability sensitive oil reservoir and preparation method thereof |
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| CN114426618B (en) * | 2020-10-14 | 2024-03-22 | 中国石油化工股份有限公司 | Polymer type high-temperature-resistant anti-swelling and shrinking agent and preparation method and application thereof |
| CN116063616B (en) * | 2021-10-30 | 2024-05-07 | 中国石油化工股份有限公司 | Swelling shrinking agent and preparation method and application thereof |
| CN115960309B (en) * | 2023-02-13 | 2024-03-26 | 西南石油大学 | Polymer sand stabilizing agent and preparation method thereof |
| CN117701264B (en) * | 2024-02-05 | 2024-05-03 | 东营煜煌能源技术有限公司 | Anti-swelling sand-inhibiting agent and preparation method thereof |
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