CN104046346B - Oil field water injection well descaling agent and preparation method thereof - Google Patents
Oil field water injection well descaling agent and preparation method thereof Download PDFInfo
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- CN104046346B CN104046346B CN201310079116.4A CN201310079116A CN104046346B CN 104046346 B CN104046346 B CN 104046346B CN 201310079116 A CN201310079116 A CN 201310079116A CN 104046346 B CN104046346 B CN 104046346B
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- scale
- water injection
- sodium
- injection well
- water
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- 238000002347 injection Methods 0.000 title claims abstract description 64
- 239000007924 injection Substances 0.000 title claims abstract description 64
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 title abstract description 8
- 239000002332 oil field water Substances 0.000 title abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 88
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 32
- -1 polyoxyethylene Polymers 0.000 claims abstract description 27
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 claims abstract description 26
- 239000001509 sodium citrate Substances 0.000 claims abstract description 15
- 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 claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 14
- 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 claims abstract description 14
- 239000011775 sodium fluoride Substances 0.000 claims abstract description 13
- 235000013024 sodium fluoride Nutrition 0.000 claims abstract description 13
- 239000007787 solid Substances 0.000 claims abstract description 13
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims abstract description 12
- 239000001632 sodium acetate Substances 0.000 claims abstract description 12
- 235000017281 sodium acetate Nutrition 0.000 claims abstract description 12
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 5
- 239000004615 ingredient Substances 0.000 claims description 28
- 238000003756 stirring Methods 0.000 claims description 13
- DBVJJBKOTRCVKF-UHFFFAOYSA-N Etidronic acid Chemical compound OP(=O)(O)C(O)(C)P(O)(O)=O DBVJJBKOTRCVKF-UHFFFAOYSA-N 0.000 claims description 12
- 229940077239 chlorous acid Drugs 0.000 claims description 12
- 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 claims description 12
- 238000013019 agitation Methods 0.000 claims description 11
- 229940074446 sodium potassium tartrate tetrahydrate Drugs 0.000 claims description 11
- GKVKQZRNDGUFSY-NSGFTINJSA-L [Na+].C(C)(CCCCCC)/C(=C(/C(=O)[O-])\C(C)CCCCCC)/C(=O)[O-].[Na+] Chemical compound [Na+].C(C)(CCCCCC)/C(=C(/C(=O)[O-])\C(C)CCCCCC)/C(=O)[O-].[Na+] GKVKQZRNDGUFSY-NSGFTINJSA-L 0.000 claims description 10
- 238000011049 filling Methods 0.000 claims description 10
- 238000011010 flushing procedure Methods 0.000 claims description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- ROXMWDUUINSZND-BTJKTKAUSA-N C(C)(CCCCCC)SC(C)CCCCCC.C(\C=C/C(=O)O)(=O)O Chemical compound C(C)(CCCCCC)SC(C)CCCCCC.C(\C=C/C(=O)O)(=O)O ROXMWDUUINSZND-BTJKTKAUSA-N 0.000 claims 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 abstract description 13
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 abstract description 13
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract description 13
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 12
- 230000007797 corrosion Effects 0.000 abstract description 11
- 238000005260 corrosion Methods 0.000 abstract description 11
- 239000002341 toxic gas Substances 0.000 abstract description 3
- 235000011006 sodium potassium tartrate Nutrition 0.000 abstract description 2
- BAERPNBPLZWCES-UHFFFAOYSA-N (2-hydroxy-1-phosphonoethyl)phosphonic acid Chemical compound OCC(P(O)(O)=O)P(O)(O)=O BAERPNBPLZWCES-UHFFFAOYSA-N 0.000 abstract 1
- GVKDLCPTYCLSQW-YFKNTREVSA-N C(\C=C/C(=O)OC(C)CCCCCC)(=O)OC(C)CCCCCC.[Na] Chemical compound C(\C=C/C(=O)OC(C)CCCCCC)(=O)OC(C)CCCCCC.[Na] GVKDLCPTYCLSQW-YFKNTREVSA-N 0.000 abstract 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 abstract 1
- OLAJEGLKIMISFJ-UHFFFAOYSA-N chlorosyl chlorite Chemical compound O=[Cl]O[Cl]=O OLAJEGLKIMISFJ-UHFFFAOYSA-N 0.000 abstract 1
- 150000002148 esters Chemical class 0.000 abstract 1
- LJCNRYVRMXRIQR-OLXYHTOASA-L potassium sodium L-tartrate Chemical compound [Na+].[K+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O LJCNRYVRMXRIQR-OLXYHTOASA-L 0.000 abstract 1
- 229940074439 potassium sodium tartrate Drugs 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 31
- 239000004519 grease Substances 0.000 description 8
- 238000010276 construction Methods 0.000 description 7
- 238000004458 analytical method Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000005536 corrosion prevention Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 239000002253 acid Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 241000124033 Salix Species 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000002738 chelating agent Substances 0.000 description 2
- 230000001804 emulsifying effect Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- VPTUPAVOBUEXMZ-UHFFFAOYSA-N (1-hydroxy-2-phosphonoethyl)phosphonic acid Chemical compound OP(=O)(O)C(O)CP(O)(O)=O VPTUPAVOBUEXMZ-UHFFFAOYSA-N 0.000 description 1
- 241001247482 Amsonia Species 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- 241000295146 Gallionellaceae Species 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 235000001014 amino acid Nutrition 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000007942 carboxylates Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 125000003636 chemical group Chemical group 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 229940005991 chloric acid Drugs 0.000 description 1
- 229910001919 chlorite Inorganic materials 0.000 description 1
- 229910052619 chlorite group Inorganic materials 0.000 description 1
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 1
- 235000015165 citric acid Nutrition 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000006184 cosolvent Substances 0.000 description 1
- 239000002781 deodorant agent Substances 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 235000011167 hydrochloric acid Nutrition 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- DUWWHGPELOTTOE-UHFFFAOYSA-N n-(5-chloro-2,4-dimethoxyphenyl)-3-oxobutanamide Chemical compound COC1=CC(OC)=C(NC(=O)CC(C)=O)C=C1Cl DUWWHGPELOTTOE-UHFFFAOYSA-N 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 235000011007 phosphoric acid Nutrition 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- BITYAPCSNKJESK-UHFFFAOYSA-N potassiosodium Chemical compound [Na].[K] BITYAPCSNKJESK-UHFFFAOYSA-N 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002455 scale inhibitor Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000035943 smell Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 235000011083 sodium citrates Nutrition 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- HRXKRNGNAMMEHJ-UHFFFAOYSA-K trisodium citrate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O HRXKRNGNAMMEHJ-UHFFFAOYSA-K 0.000 description 1
- 229940038773 trisodium citrate Drugs 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/528—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning inorganic depositions, e.g. sulfates or carbonates
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing or limiting, e.g. eliminating, the deposition of paraffins or like substances
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Organic Chemistry (AREA)
- Geology (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Inorganic Chemistry (AREA)
- Detergent Compositions (AREA)
Abstract
A descaling agent for an oil field water injection well and a preparation method belong to the technical field of oil field development, and are applied to the oil field to remove scale formed on the pipe wall of the water injection well in the water injection development process and improve the water injection efficiency. The weight percentage of the effective components of each component is as follows: hydrochloric acid (concentration 28% -38%): 5-15%; sodium acetate: 0.1-1.5%; sodium citrate: 0.1-1.5%; sodium fluoride: 0.1-8.5%; potassium sodium tartrate: 1-6%; polyoxyethylene ester of rosin acid: 0.05-0.5%; pulling powder open: 0.05-0.4%; di-sec-octyl maleate sodium sulfonate: 0.2-1.5%; solid chlorous anhydride: 0.1-0.6%; hydroxyethylidene diphosphonic acid: 0.5-1.5%; the balance of water, and the sum of the weight percentages of the components is one hundred percent. The effect is as follows: can effectively remove carbonate scale, sulfate scale, ferrous sulfide scale, oil scale and silicate scale in a water injection well, and has the corrosion degree to an oil casing and injection equipment lower than 0.5994mg/cm2H, no toxic gas H2And (5) releasing S.
Description
Technical field
The present invention relates to oil field development technical field, it is a kind of water injection well in oil fields scale remover and preparation method, for removing
Polytype fouling that during water flooding, water injection well tube wall is formed, improves water-injection efficiency.
Background technology
At present, during water flooding, inject water usually from surface water, stratum water or even sewage, in these water
Containing substantial amounts of ca2+、mg2+、ba2+、si2+、so4 2-、hco3 -Etc. easy incrustation ion, these ions enter pit shaft after, with temperature
The effect of degree, the conversion of pressure and sulfate reducting bacteria srb etc., easily forms fouling.In addition, irony pit shaft is in o2、h2s、
co2And in the presence of iron bacteria etc., easily generate rust and ferrous sulfide scale.After these foulings are formed, water filling system can be reduced
System efficiency, increases well workover number of times, corrodes pit shaft, blocks oil reservoir, so that water injection pressure is constantly raised, cause under logging equipment less than well
Bottom, or even damage water injection equipment, cause water injection well to scrap.
The water injection well scale remover that oil field is commonly used is mainly strong acid class, example hydrochloric acid, nitric acid etc., and strong acid can effectively remove carbon
Silicate dirt and ferrum dirt, but corrosivity are strong, easily cause pit shaft corrosion, and only effective to carbonate and ferrum dirt, to sulfate scale
With silicate scale effect less.In addition, if containing ferrous sulfide scale in fouling, directly with h can be generated if pickling2S, easily
Potential safety hazard is caused to workmen.
China Patent Publication No.: cn101186395, discloses a kind of composite acidic scale remover and preparation method thereof, is
Formed for preparation of raw material with propanoic acid, citric acid, aminoacid, hydrochloric acid, phosphoric acid and water, effectively can remove carbonate scale, and have
Sterilizing function and less to institute's cleaning equipment corrosivity.
China Patent Publication No.: cn101913713a, discloses a kind of sulfate scale cleaning agent, by organic carboxylate, has
Machine phosphate, a kind of neutral cleaners of reducing agent, surfactant and water composition are good to sulfate cleaning performance, to equipment
Corrosivity are little.
China Patent Publication No.: cn102345136a, discloses a kind of chemical removing the impurity such as Iron sulfuret.,
It is made up of acid chelating agent, surfactant, alkaline chelator, oxidant, corrosion inhibiter, cosolvent and water etc., at normal temperatures can
Enough effectively removing ferrous sulfide scales, will not produce toxic gas h2s.
These effectively can be removed to the fouling of some compositions, but water injection well fouling components are complicated, these snakings
The application of agent all has certain limitation.
Content of the invention
The purpose of the present invention is: a kind of water injection well in oil fields scale remover and preparation method are provided, after injection pit shaft, and Neng Gou
Carbonate scale, sulfate scale, silicate scale, ferrous sulfide scale, grease etc. in pit shaft are effectively cleaned, no in short period
Toxic gas can be produced, little to pit shaft corrosivity, to reach cleaning water injection well it is ensured that the purpose of flood pattern normal work.
The technical solution used in the present invention is:
First, water injection well in oil fields scale remover, raw material includes:
1st, hydrochloric acid: mass concentration is 28～38%
2nd, sodium acetate
3rd, sodium citrate: also known as: sodium citrate, trisodium citrate
4th, sodium fluoride
5th, sodium potassium tartrate tetrahydrate: also known as: Rochelle salt, rocchelle's salt sodium.
6th, polyoxylethylene abietate: with Colophonium as raw material, make catalyst and oxirane with koh in autoclave
Addition forms.There is excellent emulsifying, moistening, dispersive property.Purposes: be widely used in the industries such as weaving, paint, pesticide, oil
Make emulsifying agent.Production unit: Xi'an length celebrating Chemical Group.
7th, pull open powder: also known as: pull open powder bx, penetrating agent bx.Performance: the surface tension of water can be significantly reduced, have excellent
Penetration and wettability, rewettability is also splendid, and there is emulsifying, spread and spume performance.Production unit: Hubei Xing Yin
River Chemical Co., Ltd..
8th, disecoctylmaleate sodium sulfonate: also known as: quickly penetrating agent t.Performance: the surface that can significantly reduce water is opened
Power, has excellent penetration and wettability.Producer: Xingtai auxiliary reagent factory.
9th, solid chlorous acid acid anhydride, also known as: chloric acid acid anhydride.Molecular formula: clo2.It is dissolved in water, decompose simultaneously.It is dissolved in aqueous slkali and give birth to
Become chlorite and chlorate.Purposes: as oxidant, deodorant, bleach etc..Production unit: the special grand biochemistry in Tianjin has
Limit company,
10th, 1-hydroxy ethylidene-1,1-diphosphonic acid, also known as: hydroxy ethylene diphosphonic acid.Hedp is a kind of organophosphors acids scale inhibitor
Agent, can form stable complex with many kinds of metal ions such as ferrum, copper, zinc, can dissolve the oxide of metal surface.Produce single
Position: Beijing Bluestar Technology Co., Ltd.
11st, water, salinity is less than the fresh water of 500mg/l
Water injection well in oil fields scale remover, the percentage by weight of each component effective ingredient is:
Hydrochloric acid (mass concentration: 28～38%): 5～15% (effective ingredient is in terms of hcl)；
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 acid anhydride: 0.1～0.6%(effective ingredient is with clo2Meter)；
1-hydroxy ethylidene-1,1-diphosphonic acid: 0.5～1.5%；
It is absolutely that each weight percentages of components sum is counted in balance of hydration.
2nd, the production method of water injection well in oil fields scale remover:
Capital equipment: the acidproof Agitation Tank of belt stirrer.Production method:
First, under normal temperature condition, add water in the acidproof Agitation Tank of belt stirrer, by sodium acetate, sodium citrate, wine
Stone acid potassium sodium, sodium fluoride, polyoxylethylene abietate, pull open powder, seven kinds of components of disecoctylmaleate sodium sulfonate press weight
Amount percentage ratio is added to the water, and stirs, and produces foam, and each component addition sequence is random；
Secondly, under agitation, load weighted by weight percentage 1-hydroxy ethylidene-1,1-diphosphonic acid is added above-mentioned preparing
Mixed solution in, stir；
Then, under agitation, add load weighted by weight percentage solid chlorous acid acid anhydride, stir；
Finally, under agitation, load weighted by weight percentage hydrochloric acid will be added, stir, obtain faint yellow
Transparent water injection well in oil fields scale remover.
The using method of water injection well in oil fields scale remover, first by water injection well blowdown pressure letdown；Deng after the completion of blowdown pressure letdown with pump with
Water injection well in oil fields scale remover is injected fouling pit shaft and (first opens sleeve valve during positive injection, use by the mode of small displacement positive injection or anti-note
Pipeline is connected to blow-down pit or is connected in the tank filling scale remover；Open tubing valve during anti-note, be connected to emptying with pipeline
Pond or be connected to dress scale remover tank in.)；After to be cleaned dose of full oil sets annular space and oil pipe, stop injection, react 2
Hour；With the normal well-flushing of clear water after the completion of reaction, just washing backwash all can, complete scale removal after the completion of well-flushing.
Points for attention: the scale remover of the present invention has faint pungent abnormal smells from the patient, draw for avoiding joining in liquid and work progress
Play the discomfort of operator, joining should be with the good protective mast taking precautions against sour gas when liquid and construction.
Beneficial effects of the present invention: water injection well in oil fields scale remover of the present invention, to carbonate scale in water injection well, sulfate scale,
Ferrous sulfide scale, grease, silicate scale etc. carry out soaking flushing, all can complete scale removal within two hours about；And to tubing and casing and note
Enter equipment corrosion little, 0.5994mg/cm is less than to equipment corrosion degree2h；Scale removal job safety, does not have h in operation process2S gas
Body is released.
Range of application: water injection well in oil fields scale remover it is adaptable to remove all kinds of foulings that generate in the injecting process of water injection well,
Including carbonate scale, sulfate scale, ferrous sulfide scale, grease, silicate scale etc..
Specific embodiment
Embodiment 1: a kind of water injection well in oil fields scale remover, each component effective ingredient percentage by weight is:
Hydrochloric acid (mass concentration 28～38%): 10% (effective ingredient is in terms of hcl)；
Sodium acetate: 1%；
Sodium citrate: 1.5%；
Sodium fluoride: 1.5%；
Sodium potassium tartrate tetrahydrate: 3%；
Polyoxylethylene abietate: 0.5%；
Pull open powder: 0.2%；
Disecoctylmaleate sodium sulfonate: 1%；
Solid chlorous acid acid anhydride: 0.6%(effective ingredient is with clo2Meter)；
1-hydroxy ethylidene-1,1-diphosphonic acid: 1.2%；
Water: 79.5%；
Each weight percentages of components sum is absolutely.
A kind of preparation method of water injection well in oil fields scale remover: first, under normal temperature condition, acidproof in belt stirrer joins liquid
Water is added, by sodium acetate, sodium citrate, sodium potassium tartrate tetrahydrate, sodium fluoride, polyoxylethylene abietate, pull open powder, maleic in tank
Seven kinds of components of diacid di-sec-octyl sodium sulfonate are added to the water by weight percentage, stir, and produce foam, and each component adds suitable
Sequence is random；Secondly, under agitation, load weighted by weight percentage 1-hydroxy ethylidene-1,1-diphosphonic acid is added above-mentioned preparing
In mixed solution, stir；Then, under agitation, add load weighted by weight percentage solid chlorous acid acid anhydride, stir
Mix uniformly；Finally, under agitation, load weighted by weight percentage hydrochloric acid will be added, stir, obtain faint yellow
Bright water injection well in oil fields scale remover.
The key property of embodiment 1:
| Embodiment 1 | Color | Degree of corrosion (mg/cm2h) | Corrosion prevention percentage (%) |
| Pale yellow | 0.5817 | 94.27 |
Embodiment 1 using effect: Jing'an oilfield willow 88-48 water injection well fouling is serious, by analysis, its fouling scale sample ingredient
Predominantly carbonate scale and ferrous sulfide scale, and contain a small amount of silicate scale and sulfate scale.Use water injection well in oil fields scale remover
Carry out scale removal operation, using scale remover 30 side, the engineering time is 2 hours, no h in work progress2S releases.Open after the completion of construction
Begin normal water filling, water injection pressure drops to 8.5mpa by the 10mpa before scale removal, display scale removal is respond well.
Embodiment 2: water injection well in oil fields scale remover, each component effective ingredient percentage by weight is:
Hydrochloric acid (mass concentration: 28～38%): 15% (effective ingredient is in terms of hcl)；
Sodium acetate: 0.2%；
Sodium citrate: 0.5%；
Sodium fluoride: 0.1%；
Sodium potassium tartrate tetrahydrate: 2%；
Polyoxylethylene abietate: 0.5%；
Pull open powder: 0.4%；
Disecoctylmaleate sodium sulfonate: 1.5%；
Solid chlorous acid acid anhydride: 0.6%(effective ingredient is with clo2Meter)；
1-hydroxy ethylidene-1,1-diphosphonic acid: 1.5%；
Water: 77.7%
Each weight percentages of components sum is absolutely.
The preparation process of embodiment 2 is same as Example 1.
The key property of embodiment 2:
| Embodiment 2 | Color | Degree of corrosion (mg/cm2h) | Corrosion prevention percentage (%) |
| Pale yellow | 0.5994 | 93.41 |
Embodiment 2 using effect: Jing'an oilfield willow 86-50 well fouling is serious, dirty sample analysis shows its fouling scale sample ingredient
Predominantly carbonate scale and ferrous sulfide scale, and contain a small amount of sulfate scale and grease, and containing micro silicate scale.
Carry out scale removal operation with water injection well in oil fields scale remover, using scale remover 33 side, the engineering time is 2 hours, no h in work progress2s
Release.Start normal water filling after the completion of construction, water injection pressure drops to 8.5mpa by the 10mpa before scale removal, show scale removal effect
Well.
Embodiment 3: water injection well in oil fields scale remover, each component effective ingredient percentage by weight is:
Hydrochloric acid (mass concentration: 28～38%): 5% (effective ingredient is in terms of hcl)；
Sodium acetate: 0.1%；
Sodium citrate: 0.1%；
Sodium fluoride: 3%；
Sodium potassium tartrate tetrahydrate: 1%；
Polyoxylethylene abietate: 0.5%；
Pull open powder: 0.4%；
Disecoctylmaleate sodium sulfonate: 1.5%；
Solid chlorous acid acid anhydride: 0.1%(effective ingredient is with clo2Meter)；
1-hydroxy ethylidene-1,1-diphosphonic acid: 0.5%；
Water: 87.8%；
Each weight percentages of components sum is absolutely.
The preparation process of embodiment 3 is same as Example 1.
The key property of embodiment 3:
| Embodiment 3 | Color | Degree of corrosion (mg/cm2h) | Corrosion prevention percentage (%) |
| Pale yellow | 0.4112 | 96.87 |
Embodiment 3 using effect: Jing'an oilfield willow 64-70 well fouling is serious, dirty sample analysis shows its fouling scale sample ingredient
Predominantly carbonate scale, and contain a small amount of grease, and containing micro silicate scale, sulfate scale and ferrous sulfide scale.With
Water injection well in oil fields scale remover carries out scale removal operation, and using scale remover 30 side, the engineering time is 2 hours, no h in work progress2S is put
Go out.Start normal water filling, water injection pressure drops to 8.5mpa by the 11mpa before scale removal, display scale removal effect is good after the completion of construction
Good.
Embodiment 4: water injection well in oil fields scale remover, each component effective ingredient percentage by weight is:
Hydrochloric acid (mass concentration: 28～38%): 12% (effective ingredient is in terms of hcl)；
Sodium acetate: 1%；
Sodium citrate: 1%；
Sodium fluoride: 0.1%；
Sodium potassium tartrate tetrahydrate: 1%；
Polyoxylethylene abietate: 0.3%；
Pull open powder: 0.1%；
Disecoctylmaleate sodium sulfonate: 0.2%；
Solid chlorous acid acid anhydride: 0.3%(effective ingredient is with clo2Meter)；
1-hydroxy ethylidene-1,1-diphosphonic acid: 1.3%；
Water: 82.7%；
Each weight percentages of components sum is absolutely.
The preparation process of embodiment 4 is same as Example 1.
The key property of embodiment 4:
| Embodiment 4 | Color | Degree of corrosion (mg/cm2h) | Corrosion prevention percentage (%) |
| Pale yellow | 0.5724 | 94.68 |
Embodiment 4 using effect: Ansai Oilfield king's 27-04 well fouling is serious, dirty sample analysis shows its fouling scale sample ingredient
Predominantly carbonate scale, and containing micro silicate scale, sulfate scale, grease and ferrous sulfide scale.Removed with water injection well in oil fields
Dirty agent carries out scale removal operation, and using scale remover 25 side, the engineering time is 2 hours, no h in work progress2S releases.Construction completes
After start normal water filling, water injection pressure drops to 9mpa by the 10.5mpa before scale removal, and display scale removal is respond well.
Embodiment 5: water injection well in oil fields scale remover, each component effective ingredient percentage by weight is:
Hydrochloric acid, mass concentration: 28～38%:11% (effective ingredient is in terms of hcl)；
Sodium acetate: 1.2%；
Sodium citrate: 1.2%；
Sodium fluoride: 0.1%；
Sodium potassium tartrate tetrahydrate: 1%；
Polyoxylethylene abietate: 0.3%；
Pull open powder: 0.1%；
Disecoctylmaleate sodium sulfonate: 0.2%；
Solid chlorous acid acid anhydride: 0.2%(effective ingredient is with clo2Meter)；
1-hydroxy ethylidene-1,1-diphosphonic acid: 1.2%；
Water: 83.5%；
Each weight percentages of components sum is absolutely.
The preparation process of embodiment 5 is same as Example 1.
The key property of embodiment 5:
| Embodiment 5 | Color | Degree of corrosion (mg/cm2h) | Corrosion prevention percentage (%) |
| Pale yellow | 0.5620 | 94.86 |
Embodiment 5 using effect: Ansai Oilfield king's 23-01 well fouling is serious, dirty sample analysis shows its fouling scale sample ingredient
Predominantly carbonate scale, and containing micro silicate scale, sulfate scale, grease and ferrous sulfide scale.Removed with water injection well in oil fields
Dirty agent carries out scale removal operation, and using scale remover 25 side, the engineering time is 2 hours, no h in work progress2S releases.Construction completes
After start normal water filling, water injection pressure drops to 9mpa by the 11mpa before scale removal, and display scale removal is respond well.
Comparative example 1: water injection well in oil fields scale remover, each component effective ingredient percentage by weight be (be not added with pull open powder and
Disecoctylmaleate sodium sulfonate):
Hydrochloric acid, mass concentration: 28～38%:11% (effective ingredient is in terms of hcl)；
Sodium acetate: 1.2%；
Sodium citrate: 1.2%；
Sodium fluoride: 0.1%；
Sodium potassium tartrate tetrahydrate: 1%；
Polyoxylethylene abietate: 0.6%；
Solid chlorous acid acid anhydride: 0.2%(effective ingredient is with clo2Meter)；
1-hydroxy ethylidene-1,1-diphosphonic acid: 1.2%；
Water: 83.5%；
Each weight percentages of components sum is absolutely.
The preparation process of comparative example 1 is same as Example 1.
The key property of comparative example 1:
| Comparative example 1 | Color | Degree of corrosion (mg/cm2h) | Corrosion prevention percentage (%) |
| Pale yellow | 0.5620 | 94.86 |
Comparative example 1 using effect: Ansai Oilfield king's 24-02 well fouling is serious, and water injection pressure is up to 10.5mpa, dirt
Sample analysis shows that its fouling scale sample ingredient is mainly carbonate scale, and containing a small amount of grease with containing micro silicate scale, sulfur
Silicate dirt and ferrous sulfide scale.Carry out scale removal operation with the water injection well in oil fields scale remover that comparative example 1 prepares, using scale remover
25 sides, the engineering time is 2 hours, no h in work progress2S releases.Start water filling, water injection pressure still keeps after the completion of construction
Higher, scale removal effect is poor.
Claims (3)
1. water injection well in oil fields scale remover it is characterised in that: the percentage by weight of each component effective ingredient is:
Hydrochloric acid: 5～15%；
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 acid anhydride: 0.1～0.6%；
1-hydroxy ethylidene-1,1-diphosphonic acid: 0.5～1.5%；
Balance of water, each weight percentages of components sum is absolutely；
The mass concentration of described hydrochloric acid: 28～38%.
2. the preparation method of water injection well in oil fields scale remover according to claim 1, is characterized in that step is as follows:
First, under normal temperature condition, add, in the acidproof Agitation Tank of belt stirrer, the water being measured by the percentage by weight, by second
Sour sodium, sodium citrate, sodium potassium tartrate tetrahydrate, sodium fluoride, polyoxylethylene abietate, pull open powder, maleic acid di-sec-octyl sulphur
Sour seven kinds of components of sodium are added to the water by weight percentage, stir, and produce foam, and each component addition sequence is random；Secondly, exist
Under stirring condition, load weighted by weight percentage 1-hydroxy ethylidene-1,1-diphosphonic acid is added in the above-mentioned mixed solution preparing, and
Stir；Then, under agitation, add load weighted by weight percentage solid chlorous acid acid anhydride, stir；?
Afterwards, under agitation, load weighted by weight percentage hydrochloric acid will be added, stir, obtain the oil field of pale yellow transparent
Water injection well scale remover.
3. the using method of water injection well in oil fields scale remover according to claim 1, is characterized in that first letting out water injection well emptying
Pressure；Deng after the completion of blowdown pressure letdown with pump by small displacement positive injection or anti-note in the way of water injection well in oil fields scale remover is injected fouling well
Cylinder, first opens sleeve valve during positive injection, be connected to blow-down pit with pipeline or be connected in the tank filling scale remover；Open during anti-note
Tubing valve, is connected to blow-down pit with pipeline or is connected in the tank filling scale remover；To be cleaned dose of full oil sets annular space
After oil pipe, stop injection, react 2 hours；With the normal well-flushing of clear water after the completion of reaction, just washing backwash all can, after the completion of well-flushing
Complete scale removal.
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| CN105754567B (en) * | 2014-12-17 | 2018-08-14 | 中国石油天然气股份有限公司 | Water injection well scale remover and preparation method and application thereof |
| CN107652959A (en) * | 2017-09-26 | 2018-02-02 | 天津亿利科能源科技发展股份有限公司 | A kind of oilfield transportation system and the neutral scale remover of flood pattern |
| CN109897618A (en) * | 2017-12-07 | 2019-06-18 | 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 | A kind of descaling composition, scale remover and preparation method thereof |
| CN109553200A (en) * | 2018-11-21 | 2019-04-02 | 句容宁武高新技术发展有限公司 | A kind of corrosion inhibiting and descaling agent and preparation method thereof based on modified tannin acid |
| CN113249104B (en) * | 2020-02-13 | 2022-08-05 | 中国石油天然气股份有限公司 | Scale inhibition and scale removal agent and preparation method thereof |
| CN114517661B (en) * | 2020-11-20 | 2024-06-25 | 中国石油天然气股份有限公司 | Determination method for descaling measure of water injection block |
| US11746278B1 (en) * | 2022-06-02 | 2023-09-05 | King Fahd University Of Petroleum And | Method of removing sulfide-containing scale |
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