CN105754567A - Water injection well scale remover and preparation method and application thereof - Google Patents
Water injection well scale remover and preparation method and application thereof Download PDFInfo
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- CN105754567A CN105754567A CN201410784912.2A CN201410784912A CN105754567A CN 105754567 A CN105754567 A CN 105754567A CN 201410784912 A CN201410784912 A CN 201410784912A CN 105754567 A CN105754567 A CN 105754567A
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- injection well
- water injection
- scale remover
- water
- well scale
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 128
- 238000002347 injection Methods 0.000 title claims abstract description 94
- 239000007924 injection Substances 0.000 title claims abstract description 94
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000005260 corrosion Methods 0.000 claims abstract description 40
- 230000007797 corrosion Effects 0.000 claims abstract description 39
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 38
- 239000000654 additive Substances 0.000 claims abstract description 33
- 230000000996 additive effect Effects 0.000 claims abstract description 33
- 239000002270 dispersing agent Substances 0.000 claims abstract description 33
- 239000000375 suspending agent Substances 0.000 claims abstract description 33
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical group Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229920005610 lignin Polymers 0.000 claims abstract description 13
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims abstract description 11
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 11
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims abstract description 11
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims abstract description 11
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims abstract description 8
- 230000002101 lytic effect Effects 0.000 claims description 33
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 claims description 15
- BBUPDLILCKMSEN-UHFFFAOYSA-N 1-bromododecane;pyridine Chemical compound C1=CC=NC=C1.CCCCCCCCCCCCBr BBUPDLILCKMSEN-UHFFFAOYSA-N 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 15
- HIWVFNVUJDPDKS-UHFFFAOYSA-N 1-octadecylpyridin-1-ium Chemical compound CCCCCCCCCCCCCCCCCC[N+]1=CC=CC=C1 HIWVFNVUJDPDKS-UHFFFAOYSA-N 0.000 claims description 14
- 230000031709 bromination Effects 0.000 claims description 14
- 238000005893 bromination reaction Methods 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 12
- SMWDFEZZVXVKRB-UHFFFAOYSA-N anhydrous quinoline Natural products N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 claims description 11
- OCBHHZMJRVXXQK-UHFFFAOYSA-M benzyl-dimethyl-tetradecylazanium;chloride Chemical group [Cl-].CCCCCCCCCCCCCC[N+](C)(C)CC1=CC=CC=C1 OCBHHZMJRVXXQK-UHFFFAOYSA-M 0.000 claims description 11
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims description 11
- 150000001875 compounds Chemical class 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 7
- 239000004141 Sodium laurylsulphate Substances 0.000 claims description 7
- 235000019333 sodium laurylsulphate Nutrition 0.000 claims description 7
- 238000011161 development Methods 0.000 abstract description 2
- 239000003112 inhibitor Substances 0.000 abstract 2
- LLVHFJHCODIQJH-UHFFFAOYSA-N 2-benzylquinoline Chemical group C=1C=C2C=CC=CC2=NC=1CC1=CC=CC=C1 LLVHFJHCODIQJH-UHFFFAOYSA-N 0.000 abstract 1
- ABJVAXXYHSSYLK-UHFFFAOYSA-N 2-dodecylpyridine;hydrobromide Chemical compound Br.CCCCCCCCCCCCC1=CC=CC=N1 ABJVAXXYHSSYLK-UHFFFAOYSA-N 0.000 abstract 1
- JSMRDVDHYKKNFC-UHFFFAOYSA-N 2-octadecylpyridine;hydrobromide Chemical compound Br.CCCCCCCCCCCCCCCCCCC1=CC=CC=N1 JSMRDVDHYKKNFC-UHFFFAOYSA-N 0.000 abstract 1
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 abstract 1
- DVBJBNKEBPCGSY-UHFFFAOYSA-M cetylpyridinium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+]1=CC=CC=C1 DVBJBNKEBPCGSY-UHFFFAOYSA-M 0.000 abstract 1
- QNVRIHYSUZMSGM-UHFFFAOYSA-N hexan-2-ol Chemical compound CCCCC(C)O QNVRIHYSUZMSGM-UHFFFAOYSA-N 0.000 abstract 1
- 230000005764 inhibitory process Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 8
- 230000008901 benefit Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 3
- GKVKQZRNDGUFSY-NSGFTINJSA-L [Na+].C(C)(CCCCCC)/C(=C(/C(=O)[O-])\C(C)CCCCCC)/C(=O)[O-].[Na+] Chemical group [Na+].C(C)(CCCCCC)/C(=C(/C(=O)[O-])\C(C)CCCCCC)/C(=O)[O-].[Na+] GKVKQZRNDGUFSY-NSGFTINJSA-L 0.000 description 2
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000003599 detergent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- -1 polyoxylethylene Polymers 0.000 description 2
- NROKBHXJSPEDAR-UHFFFAOYSA-M potassium fluoride Chemical group [F-].[K+] NROKBHXJSPEDAR-UHFFFAOYSA-M 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 2
- IEQAICDLOKRSRL-UHFFFAOYSA-N 2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-[2-(2-dodecoxyethoxy)ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethanol Chemical compound CCCCCCCCCCCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCO IEQAICDLOKRSRL-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- ZGTMUACCHSMWAC-UHFFFAOYSA-L EDTA disodium salt (anhydrous) Chemical group [Na+].[Na+].OC(=O)CN(CC([O-])=O)CCN(CC(O)=O)CC([O-])=O ZGTMUACCHSMWAC-UHFFFAOYSA-L 0.000 description 1
- DBVJJBKOTRCVKF-UHFFFAOYSA-N Etidronic acid Chemical compound OP(=O)(O)C(O)(C)P(O)(O)=O DBVJJBKOTRCVKF-UHFFFAOYSA-N 0.000 description 1
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- RSWGJHLUYNHPMX-ONCXSQPRSA-N abietic acid Chemical compound C([C@@H]12)CC(C(C)C)=CC1=CC[C@@H]1[C@]2(C)CCC[C@@]1(C)C(O)=O RSWGJHLUYNHPMX-ONCXSQPRSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 229940077239 chlorous acid Drugs 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 229930182470 glycoside Natural products 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011698 potassium fluoride Substances 0.000 description 1
- 235000003270 potassium fluoride Nutrition 0.000 description 1
- VZOPRCCTKLAGPN-ZFJVMAEJSA-L potassium;sodium;(2r,3r)-2,3-dihydroxybutanedioate;tetrahydrate Chemical compound O.O.O.O.[Na+].[K+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O VZOPRCCTKLAGPN-ZFJVMAEJSA-L 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 239000001509 sodium citrate Substances 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- 239000011775 sodium fluoride Substances 0.000 description 1
- 235000013024 sodium fluoride Nutrition 0.000 description 1
- ZNCPFRVNHGOPAG-UHFFFAOYSA-L sodium oxalate Chemical compound [Na+].[Na+].[O-]C(=O)C([O-])=O ZNCPFRVNHGOPAG-UHFFFAOYSA-L 0.000 description 1
- 229940074446 sodium potassium tartrate tetrahydrate Drugs 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000012224 working solution Substances 0.000 description 1
Landscapes
- Detergent Compositions (AREA)
Abstract
The invention discloses a water injection well scale remover and a preparation method and application thereof, and belongs to the field of oilfield development. The water injection well descaling agent comprises the following components in percentage by mass: 25-40% of scale dissolving agent, 3-6% of dispersing agent, 3-6% of corrosion inhibitor, 3-6% of cleanup additive, 1-3% of suspending agent and the balance of water; wherein the scale dissolvent is hydrochloric acid with the concentration of 25-37%; the dispersant is at least one selected from carboxymethyl cellulose, sodium dodecyl sulfate and 1-methylpentanol; the corrosion inhibitor is benzyl quinoline quaternary ammonium chloride; the cleanup additive is selected from at least one of dodecyl pyridine bromide, hexadecyl pyridine bromide and octadecyl pyridine bromide; the suspending agent is lignin. The water injection well descaling agent can deeply descale, has a corrosion inhibition function, is easy to flowback, and cannot cause secondary pollution to a stratum.
Description
Technical field
The present invention relates to oil field development field, particularly to a kind of water injection well scale remover and its preparation method and application.
Background technology
In water flooding process, it is common to use water injection well injects water into oil reservoir, keep or recover formation pressure, making oil reservoir have stronger driving force, to improve exploitation rate and the recovery ratio of oil reservoir.But, water injection well is in use, due to burn into precipitation, gum deposit, carbon deposit, bacterial reproduction etc., easily cause pipe string internal wall fouling, the deposition of incrustation scale causes the electrochemical corrosion of tubing string local, reduced stream cross-sectional area, and increased hydraulic resistance and carry energy, blocking oil well passage, thus reducing oil well output.And, pump card, screen casing also can be caused to block, down-hole string, instrument block, operation can not pulled out, do not go under test instrunment, causes bigger difficulty to maintenance, has a strong impact on the normal of oil field and produce and economic benefit.It is therefore necessary to water injection well is carried out scale removal.
The method that water injection well carries out scale removal at present mainly includes mechanical descaling and chemical cleaning.Wherein, mechanical descaling utilizes rotating disk or helicoid hydraulic motor to drive down-hole string to rotate, and utilizes the rotation being connected on the drill bit of foot, junk mill or milling cone to bore the dirt on Decanning wall, then rinses with cementing truck and take ground out of, reach scale removal purpose.But mechanical descaling can endanger the integrity of tubing string in operation process, poor for irregular tubing string adaptability, and the dirty thing of near wellbore cannot be removed, duty cycle is longer.Chemical cleaning method is the most frequently used descaling method, and it is that the effect by chemical agent makes the incrustation scale being cleaned by equipment dissolve, loosen, come off or peel off, and its advantage is that specific aim is relatively strong, and construction technology is simple, less costly.
For example, CN102604617A provides a kind of oil-water well carbonate scale remover, penetrating agent, dirt lytic agent, detergent, scale removal synergist, anti-soil adhesion extender and water mix.Wherein, penetrating agent is disecoctylmaleate sodium sulfonate, and dirt lytic agent is disodiumedetate；Detergent is petroleum sulfonate, Brij 35 sodium sulfate or alkylpolyoxyethylene；Scale removal synergist is potassium fluoride, Disodium oxalate. or Ammonium persulfate..But, owing to this dirt remover corrosive power is strong, easily cause formation contaminant.In order to reduce the corrosivity of dirt remover, further, CN104046346A provides a kind of water injection well in oil fields scale remover, including following components in percentage by weight: mass concentration is the hydrochloric acid 5-15% of 28-38%, sodium acetate 0.1-1.5%, sodium citrate 0.1-1.5%, sodium fluoride 0.1-8.5%, sodium potassium tartrate tetrahydrate 1-6%, polyoxylethylene abietate 0.05-0.5%, pull open powder 0.05-0.4%, disecoctylmaleate sodium sulfonate 0.2-1.5%, solid chlorous acid glycosides 0.1-0.6%, 1-hydroxy ethylidene-1,1-diphosphonic acid 0.5-1.5%, surplus are water.
Inventor have found that prior art at least there is problems in that
The scale remover that prior art provides easily remains in the earth formation, and stratum is caused secondary pollution.
Summary of the invention
Embodiment of the present invention technical problem to be solved is in that, it is provided that a kind of can degree of depth scale removal again can the water injection well scale remover and its preparation method and application of effectively anticorrosion and the easy row of returning.Concrete technical scheme is as follows:
First aspect, it is provided that a kind of water injection well scale remover, including the component of following weight/mass percentage composition: dirt lytic agent 25-40%, dispersant 3-6%, corrosion inhibiter 3-6%, cleanup additive 3-6%, suspending agent 1-3%, surplus are water；
Described dirt lytic agent is concentration is the hydrochloric acid of 25-37%；
Described dispersant at least one in carboxymethyl cellulose, sodium lauryl sulphate, 1-methyl anyl alcohol；
Described corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；
Described cleanup additive at least one in dodecyl bromide pyridine, brocide, bromination octadecylpyridinium；
Described suspending agent is lignin.
As preferably, described water injection well scale remover includes the component of following weight/mass percentage composition: dirt lytic agent 32.5%, dispersant 4.5%, corrosion inhibiter 4.5%, cleanup additive 4.5%, suspending agent 2%, surplus are water；
Described dirt lytic agent is concentration is the hydrochloric acid of 25-37%；
Described dispersant is carboxymethyl cellulose；
Described corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；
Described cleanup additive is the compound of dodecyl bromide pyridine, brocide and bromination octadecylpyridinium, and in described compound, the mass ratio of dodecyl bromide pyridine, brocide and bromination octadecylpyridinium is 1:1:1；
Described suspending agent is lignin.
Second aspect, the preparation method providing above-mentioned water injection well scale remover, including: the proportioning according to component each in water injection well scale remover, material-compound tank adds water, in described material-compound tank, then adds lytic agent and dispersant again, after stirring, corrosion inhibiter and cleanup additive is added again in described material-compound tank, it is again stirring for after uniformly, then in described material-compound tank, adds suspending agent, obtain water injection well scale remover；
Wherein, described water injection well scale remover includes the component of following weight/mass percentage composition: dirt lytic agent 25-40%, dispersant 3-6%, corrosion inhibiter 3-6%, cleanup additive 3-6%, suspending agent 1-3%, surplus are water；
Described dirt lytic agent is concentration is the hydrochloric acid of 25-37%；
Described dispersant at least one in carboxymethyl cellulose, sodium lauryl sulphate, 1-methyl anyl alcohol；
Described corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；
Described cleanup additive at least one in dodecyl bromide pyridine, brocide, bromination octadecylpyridinium；
Described suspending agent is lignin.
The third aspect, provide the method utilizing above-mentioned water injection well scale remover to carry out scale removal, including: in injecting water, add water injection well scale remover, the 0.1-3% making described water injection well scale remover weight be described injection water weight, obtain the injection water containing water injection well scale remover；
Utilize water injection well that the described injection water containing water injection well scale remover is injected stratum, after reacting 2-4 hour, carry out the row of returning, complete water injection well scale removal process.
The technical scheme that the embodiment of the present invention provides has the benefit that
The component with above-mentioned restriction of embodiment of the present invention offer and the water injection well scale remover of proportioning, there is between each component good compatibility, by the collaborative compatibility effect between each component, this water injection well scale remover can not only reach the purpose of degree of depth scale removal, and there is corrosion inhibitive function, reach effective antiseptical purpose.And, the aqueous solution surface tension of the water injection well scale remover that the embodiment of the present invention provides is between 18-21mN/m, has the good row's of returning performance, stratum will not be caused secondary pollution.
Detailed description of the invention
For making technical scheme and advantage clearly, below embodiment of the present invention is described further in detail.
First aspect, it is provided that a kind of water injection well scale remover, including the component of following weight/mass percentage composition: dirt lytic agent 25-40%, dispersant 3-6%, corrosion inhibiter 3-6%, cleanup additive 3-6%, suspending agent 1-3%, surplus are water；
Wherein, dirt lytic agent is concentration is the hydrochloric acid of 25-37%；Dispersant at least one in carboxymethyl cellulose, sodium lauryl sulphate, 1-methyl anyl alcohol；Corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；Cleanup additive at least one in dodecyl bromide pyridine, brocide, bromination octadecylpyridinium；Suspending agent is lignin.
Wherein, dirt lytic agent can play scale removal solubilization；Dispersant plays promotion dispersion, improves mobility effect；Corrosion inhibiter plays the chemical attack effect reduced equipment installation, it is ensured that borehole wall extent of corrosion is reached minimum by acid solution；Cleanup additive plays the effect helping work residual liquid to return row from stratum, can avoid the generation of secondary precipitation；Suspending agent plays the effect preventing working solution from decomposing, precipitating, and can strengthen system compatibility.
Based on above-mentioned known, the component with above-mentioned restriction of embodiment of the present invention offer and the water injection well scale remover of proportioning, there is between each component good compatibility, by the collaborative compatibility effect between each component, this water injection well scale remover can reach the purpose of degree of depth scale removal, release blocking at short notice, improve reservoir permeability, the normal water filling of fast quick-recovery.And scale remover of the present invention has corrosion inhibitive function, the corrosion that waterflood-transmission line and equipment are caused is down to minimum, reaches effective antiseptical purpose.Further, the aqueous solution surface tension of water injection well scale remover of the present invention is between 18-21mN/m, has the good row's of returning performance, it is easy to the row of returning, and is beneficial to work residual liquid and discharges from stratum.Additionally, scale remover adaptive type of the present invention is strong, multiple water injection well dirt all there is certain scale removal effect.
In order to ensure that scale remover of the present invention has preferably scale removal, anticorrosion and the row's of returning ability simultaneously, as preferably, this water injection well scale remover includes the component of following weight/mass percentage composition: dirt lytic agent 32.5%, dispersant 4.5%, corrosion inhibiter 4.5%, cleanup additive 4.5%, suspending agent 2%, surplus are water；
Wherein, dirt lytic agent is concentration is the hydrochloric acid of 25-37%；Dispersant is carboxymethyl cellulose；Corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；Cleanup additive is the compound of dodecyl bromide pyridine, brocide and bromination octadecylpyridinium, and in this compound, the mass ratio of dodecyl bromide pyridine, brocide and bromination octadecylpyridinium is 1:1:1；Suspending agent is lignin.
Second aspect, the preparation method embodiments providing above-mentioned water injection well scale remover, including: the proportioning according to component each in water injection well scale remover, material-compound tank adds water, in described material-compound tank, then adds lytic agent and dispersant again, after stirring, corrosion inhibiter and cleanup additive is added again in described material-compound tank, it is again stirring for after uniformly, then in described material-compound tank, adds suspending agent, obtain water injection well scale remover.
It is understood that this water injection well scale remover includes the component of following weight/mass percentage composition: dirt lytic agent 25-40%, dispersant 3-6%, corrosion inhibiter 3-6%, cleanup additive 3-6%, suspending agent 1-3%, surplus are water.Dirt lytic agent is concentration is the hydrochloric acid of 25-37%；Dispersant at least one in carboxymethyl cellulose, sodium lauryl sulphate, 1-methyl anyl alcohol；Corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；Cleanup additive at least one in dodecyl bromide pyridine, brocide, bromination octadecylpyridinium；Suspending agent is lignin.
The embodiment of the present invention prepares water injection well scale remover by above-mentioned method, is more conducive to each component and mixes equably, it is ensured that its compatibility, thus preparing the desired water injection well scale remover of the embodiment of the present invention.
The third aspect, embodiments provide the application of above-mentioned water injection well scale remover, namely the method utilizing above-mentioned water injection well scale remover to carry out scale removal is provided, including: in injecting water, add water injection well scale remover, making water injection well scale remover weight is inject the 0.1-3% of water weight, obtains the injection water containing water injection well scale remover；
Utilize water injection well that this injection water containing water injection well scale remover is injected stratum, after reacting 2-4 hour, carry out the row of returning, complete water injection well scale removal process.
The embodiment of the present invention utilizes said method that water injection well scale remover is applied, and the application making this scale remover is simple and convenient, improves scale removal efficiency.And, by scale remover is defined in the proportioning injected in water, to ensure while reaching good scale removal, antiseptic effect, do not cause the waste of scale remover.As preferably, above-mentioned water injection well scale remover weight is inject water weight 2%.
It is understandable that, " utilizing water injection well that this injection water containing water injection well scale remover is injected stratum " above-mentioned in the embodiment of the present invention and " row of returning " process are state of the art, and those skilled in the art can carry out aforesaid operations according to this area conventional means.
Hereinafter will be further described through the present invention by specific embodiment.
Unreceipted condition person in specific examples below, all conventionally condition carries out.Raw materials used unreceipted production firm and specification person be can pass through city available from conventional products.
Embodiment 1
Present embodiments provide a kind of water injection well scale remover, including the component of following weight/mass percentage composition: dirt lytic agent 25%, dispersant 3%, corrosion inhibiter 3%, cleanup additive 3%, suspending agent 1%, surplus are water；
Wherein, dirt lytic agent is concentration is the hydrochloric acid of 25%；Dispersant is sodium lauryl sulphate；Corrosion inhibiter is；Cleanup additive is dodecyl bromide pyridine；Suspending agent is lignin.
The preparation method of this water injection well scale remover is as follows: the proportioning according to component each in water injection well scale remover, material-compound tank with agitator adds water, then in material-compound tank, add lytic agent and dispersant again, after stirring, corrosion inhibiter and cleanup additive is added again in material-compound tank, it is again stirring for after uniformly, then in material-compound tank, adds suspending agent, obtain the desired water injection well scale remover of the present embodiment.
Embodiment 2
Present embodiments provide a kind of water injection well scale remover, including the component of following weight/mass percentage composition: dirt lytic agent 40%, dispersant 6%, corrosion inhibiter 6%, cleanup additive 6%, suspending agent 3%, surplus are water；
Wherein, dirt lytic agent is concentration is the hydrochloric acid of 37%；Dispersant is 1-methyl anyl alcohol；Corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；Cleanup additive is brocide；Suspending agent is lignin.
The preparation method of this water injection well scale remover is as follows: the proportioning according to component each in water injection well scale remover, material-compound tank with agitator adds water, then in material-compound tank, add lytic agent and dispersant again, after stirring, corrosion inhibiter and cleanup additive is added again in material-compound tank, it is again stirring for after uniformly, then in material-compound tank, adds suspending agent, obtain the desired water injection well scale remover of the present embodiment.
Embodiment 3
Present embodiments provide a kind of water injection well scale remover, including the component of following weight/mass percentage composition: dirt lytic agent 32.5%, dispersant 4.5%, corrosion inhibiter 4.5%, cleanup additive 4.5%, suspending agent 2%, surplus are water；
Wherein, dirt lytic agent is concentration is the hydrochloric acid of 32%；Dispersant is carboxymethyl cellulose；Corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；Cleanup additive is the compound of dodecyl bromide pyridine, brocide and bromination octadecylpyridinium, and in described compound, the mass ratio of dodecyl bromide pyridine, brocide and bromination octadecylpyridinium is 1:1:1；Suspending agent is lignin.
The preparation method of this water injection well scale remover is as follows: the proportioning according to component each in water injection well scale remover, material-compound tank with agitator adds water, then in material-compound tank, add lytic agent and dispersant again, after stirring, corrosion inhibiter and cleanup additive is added again in material-compound tank, it is again stirring for after uniformly, then in material-compound tank, adds suspending agent, obtain the desired water injection well scale remover of the present embodiment.
Embodiment 4
The present embodiment utilizes the embodiment 1-3 water injection well scale remover provided respectively the 10-86 well in area, 31-4 well and 10-126X well in North China Oilfield Ji to be carried out dirty removing processing, and has measured with regard to related data therein.
Concrete operation step is as follows: pumped in pressure duct by water injection well scale remover in the predetermined ratio shown in table 1 at the distributing room for water injection high-pressure pump injecting water, and injects stratum along with injecting water.After 4 hours, work residual liquid is carried out the row of returning.Operating parameter and experimental result in experimentation are as shown in table 1.
Table 1
As shown in Table 1, water injection well in oil fields effectively can be carried out scale removal by the scale remover that the embodiment of the present invention provides, and releases blocking, improves reservoir permeability, the normal water filling of fast quick-recovery, and improves water injection rate, has the anti-scaling function of excellence.The scale remover that the embodiment of the present invention provides also has excellent anti-corrosion function, effectively slows down the corrosion of waterflood-transmission line and equipment.And, the scale remover surface tension in aqueous that the embodiment of the present invention provides is very little, be more conducive to the row of returning, it is to avoid cause secondary pollution in the earth formation.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the scope of the invention, all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (5)
1. a water injection well scale remover, including the component of following weight/mass percentage composition: dirt lytic agent 25-40%, dispersant 3-6%, corrosion inhibiter 3-6%, cleanup additive 3-6%, suspending agent 1-3%, surplus are water；
Described dirt lytic agent is concentration is the hydrochloric acid of 25-37%；
Described dispersant at least one in carboxymethyl cellulose, sodium lauryl sulphate, 1-methyl anyl alcohol；
Described corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；
Described cleanup additive at least one in dodecyl bromide pyridine, brocide, bromination octadecylpyridinium；
Described suspending agent is lignin.
2. water injection well scale remover according to claim 1, it is characterized in that, described water injection well scale remover includes the component of following weight/mass percentage composition: dirt lytic agent 32.5%, dispersant 4.5%, corrosion inhibiter 4.5%, cleanup additive 4.5%, suspending agent 2%, surplus are water；
Described dirt lytic agent is concentration is the hydrochloric acid of 25-37%；
Described dispersant is carboxymethyl cellulose；
Described corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；
Described cleanup additive is the compound of dodecyl bromide pyridine, brocide and bromination octadecylpyridinium, and in described compound, the mass ratio of dodecyl bromide pyridine, brocide and bromination octadecylpyridinium is 1:1:1；
Described suspending agent is lignin.
3. the preparation method of the water injection well scale remover described in a claim 1, including: the proportioning according to component each in water injection well scale remover, material-compound tank adds water, then in described material-compound tank, add lytic agent and dispersant again, after stirring, then in described material-compound tank, add corrosion inhibiter and cleanup additive, be again stirring for after uniformly, in described material-compound tank, add suspending agent again, obtain water injection well scale remover；
Wherein, described water injection well scale remover includes the component of following weight/mass percentage composition: dirt lytic agent 25-40%, dispersant 3-6%, corrosion inhibiter 3-6%, cleanup additive 3-6%, suspending agent 1-3%, surplus are water；
Described dirt lytic agent is concentration is the hydrochloric acid of 25-37%；
Described dispersant at least one in carboxymethyl cellulose, sodium lauryl sulphate, 1-methyl anyl alcohol；
Described corrosion inhibiter is zephiran chloride quinoline quaternary ammonium salt；
Described cleanup additive at least one in dodecyl bromide pyridine, brocide, bromination octadecylpyridinium；
Described suspending agent is lignin.
4. utilize the method that the water injection well scale remover described in claim 1 or 2 carries out scale removal, including: in injecting water, add water injection well scale remover, the 0.1-3% making described water injection well scale remover weight be described injection water weight, obtains the injection water containing water injection well scale remover；
Utilize water injection well that the described injection water containing water injection well scale remover is injected stratum, after reacting 2-4 hour, carry out the row of returning, complete water injection well scale removal process.
5. method according to claim 4, it is characterised in that described water injection well scale remover weight is the 2% of described injection water weight.
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| CN113337262A (en) * | 2021-06-07 | 2021-09-03 | 中国石油化工股份有限公司 | Composite descaling method for split-injection water injection well |
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| CN105754567B (en) | 2018-08-14 |
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