CN106367052A - Decompression and augmented injection agent for water injection well as well as preparation method and application thereof - Google Patents
Decompression and augmented injection agent for water injection well as well as preparation method and application thereof Download PDFInfo
- Publication number
- CN106367052A CN106367052A CN201610806326.2A CN201610806326A CN106367052A CN 106367052 A CN106367052 A CN 106367052A CN 201610806326 A CN201610806326 A CN 201610806326A CN 106367052 A CN106367052 A CN 106367052A
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- China
- Prior art keywords
- acid
- injection
- water
- agent
- well
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
Abstract
The invention discloses a decompression and augmented injection agent for a water injection well as well as a preparation method and application of the decompression and augmented injection agent for the water injection well, and belongs to the field of chemicals for petroleum industry. The decompression and augmented injection agent comprises the following components in percentage by weight: 20 to 25% of organic acid, 10 to 15% of phytic acid, 15 to 20% of nitrilotriacetic acid, 15 to 20% of a metal ion chelating agent, 6 to 10% of hydrofluoric acid, 5 to 10 parts of ammonium chloride, and 0 to 29% of water. While preparing, the materials are mixed and stirred uniformly according to ingredient amounts to obtain the decompression and augmented injection agent. The decompression and augmented injection agent disclosed by the invention has the characteristics of three-section acidification of secondary precipitation control, long action radius and less corrosion, and further can overcome the defects of requirement on on-site liquid preparation, high operation intensity, long time, injection stop of the water injection well and the like in the prior art.
Description
Technical field
The invention belongs to petroleum industry uses chemical article field, specially a kind of increasing injection agent for water injection well and its
Preparation method and application.
Background technology
The water filling well acidizing commonly used at present mainly uses conventional acidulation pattern, and conventional acid solution includes hydrochloric acid, Fluohydric acid., fluorine boron
Acid and corresponding additive, but found by conventional acidulation operation for many years, conventional acidulation typical case's operational procedure is three-stage
(prepad fluid, treatment fluid, after pad), has that acidizing unit floor space is big, acidizing treatment time length, operation routine is complicated, make
The problems such as industry environmental requirement is high, dynamic recovery bothers and coordination difficulty is big, frequently acidizing treatment carries many wells time to oil-field flooding, production
To have a strong impact on.
Content of the invention
It is an object of the invention to provide a kind of increasing injection agent for water injection well and its preparation method and application, can be complete
The full acid fluid system substituting conventional acidulation three-stage liquid, has control secondary precipitation, the operating radius that three-stage acidifying has
Advantage long, that corrosion is few, and preparation method is simple, easy to use.
The technical scheme realizing above-mentioned purpose is: a kind of increasing injection agent for water injection well is it is characterised in that each component
Percentage by weight is: organic acid: 20-25%, phytic acid: 10-15%, nitrilotriacetic acid(NTA): 15-20%, metal ion chelation agent:
15-20%, Fluohydric acid.: 6-10%, ammonium chloride: 5-10%, water: 0-29%.
Preferably, organic acid be formic acid, acetic acid, citric acid, maleic acid, in sulfamic acid at least any one.
Preferably, described metal ion chelation agent is ethylenediaminetetraacetic acid, cyclohexylidene sodium ethylene diamine tetracetate, gluconic acid
Sodium, one of edtmpa, dtpmpa.
The increasing injection agent of the present invention has three-stage and is acidified the control secondary precipitation having, operating radius length, corrosion less
Feature, prior art can also be overcome to need scene the to join defect such as liquid, operation intensity be big, time length, water injection well needs stop noting,
While ensureing acidizing effect, can significantly save water injection well in oil fields acidizing treatment time, space, expense and manpower, improve
Acidizing treatment safety, thus providing effective, simple, easy technical support for water injection well in oil fields increasing injection, improves acidifying
Working performance is it is ensured that oil field production is smoothed out.
Increasing injection agent clean environment firendly, will not be to causing secondary pollution in well, therefore need not the row of returning after injection water injection well.
The present invention also proposes the preparation method of above-mentioned increasing injection agent: by dosage by material mixing and stirring, obtains
Increasing injection agent, preparation method is simple, convenient.
The present invention also proposes the application of above-mentioned increasing injection agent: injection water and increasing injection agent into water injection well respectively, treats
When apparent water injectivity index improves 45%-55%, stop injection pressure drop pressure injection agent, and per diem injection allocation amount continues the note into water injection well
Water.
The application mode of the relatively existing increasing injection agent of this application has the special feature that and advantage: need not prepare Agitation Tank in scene
With join liquid pump, directly from storage tank, the increasing injection having configured agent is injected in water injection well, reduces construction labor intensity and construction
Expense；Using fixed tubular column construction, simplify work progress, shorten the engineering time；The whole closing of construction, no dirty to water, soil, air
Dye, safe and reliable.
Specific embodiment
Embodiment 1:
A kind of increasing injection agent for water injection well, including formic acid and acetate mixture 250 weight portion (between formic acid and acetic acid
Mass ratio is: 2:3), phytic acid 150 weight portion, nitrilotriacetic acid(NTA) 200 weight portion, ethylenediaminetetraacetic acid 200 weight portion, hydrogen fluorine
Sour 100 weight portions, ammonium chloride 100 weight portion；Total amount is 1000 weight portions.
The preparation method of above-mentioned increasing injection agent: by dosage by material mixing and stirring, obtain increasing injection agent.
The application of above-mentioned increasing injection agent: increasing injection agent is pumped in high pressure water injection pipeline, with injection water injection stratum,
When apparent water injectivity index improves 45%, stop injection pressure drop pressure injection agent, and continue to water filling in water injection well by injection allocation amount day.
Second embodiment
A kind of increasing injection agent for water injection well, each weight percentages of components is: the mixture of acetic acid, citric acid and maleic acid
250 weight portions (mass ratio between acetic acid, citric acid and maleic acid is: 2:1:2), phytic acid 120 weight portion, nitrilotriacetic acid(NTA)
180 weight portions, cyclohexylidene sodium ethylene diamine tetracetate 170 weight portion, Fluohydric acid. 80 weight portion, ammonium chloride 50 weight portion, water 150 weight
Amount part；Total amount is 1000 weight portions.
The preparation method of above-mentioned increasing injection agent is same as Example 1.
The application of above-mentioned increasing injection agent: injection water and increasing injection agent into water injection well respectively, treat that apparent water injectivity index carries
When high 50%, stop injection pressure drop pressure injection agent, and per diem injection allocation amount continues to water filling in water injection well.
3rd embodiment
A kind of increasing injection agent for water injection well, mixture 200 weight portion (maleic acid and the amino of maleic acid and sulfamic acid
The mass ratio of sulfonic acid is: 2:1), phytic acid 100 weight portion, nitrilotriacetic acid(NTA) 150 weight portion, edtmpa150 weight portion, hydrogen fluorine
Sour 60 weight portions, ammonium chloride 50 weight portion, water 290 weight portion；Total amount is 1000 weight portions.
The application of above-mentioned increasing injection agent: injection water and increasing injection agent into water injection well respectively, treat that apparent water injectivity index carries
When high 55%, stop injection pressure drop pressure injection agent, and per diem injection allocation amount continues to water filling in water injection well.
Injectivity index described in embodiment 1, embodiment 2, embodiment 3 refers to water injection well diurnal injection and well head pressure
Ratio.
Organic acid in embodiment 1, embodiment 2, embodiment 3 is can be formic acid, acetic acid, citric acid, maleic acid, amino
In sulfonic acid at least any one.
Metal ion chelation agent in embodiment 1, embodiment 2, embodiment 3 can be ethylenediaminetetraacetic acid, cyclohexylidene
Sodium ethylene diamine tetracetate, sodium gluconate, one of edtmpa, dtpmpa.
Day injection allocation amount in embodiment 1, embodiment 2, embodiment 3 refers to: according to around wanting to water injection rate about oil well
Ask, the daily water-injection rate of the oil bearing formation property distribution of different intervals pressed by water injection well.
Claims (5)
1. a kind of increasing injection agent for water injection well is it is characterised in that each weight percentages of components is: organic acid: 20-
25%th, phytic acid: 10-15%, nitrilotriacetic acid(NTA): 15-20%, metal ion chelation agent: 15-20%, Fluohydric acid.: 6-10%, chlorine
Change ammonium: 5-10%, water: 0-29%.
2. a kind of increasing injection agent for water injection well according to claim 1 it is characterised in that: organic acid be formic acid,
In acetic acid, citric acid, maleic acid, sulfamic acid at least any one.
3. a kind of increasing injection agent for water injection well according to claim 1 it is characterised in that: metal ion chelation agent
For ethylenediaminetetraacetic acid, cyclohexylidene sodium ethylene diamine tetracetate, sodium gluconate, one of edtmpa, dtpmpa.
4. increasing injection agent as claimed in claim 1 preparation method it is characterised in that: by dosage by material mix and blend
Uniformly, obtain increasing injection agent, the percentage by weight of described each component materials is: organic acid: 20-25%, phytic acid: 10-15%,
Nitrilotriacetic acid(NTA): 15-20%, metal ion chelation agent: 15-20%, Fluohydric acid.: 6-10%, ammonium chloride: 5-10%, water: 0-
29%.
5. increasing injection agent as claimed in claim 1 application it is characterised in that: the injection water and blood pressure lowering into water injection well respectively
Injection agent, until apparent water injectivity index improve 45%-55% when, stop injection pressure drop pressure injection agent, and per diem injection allocation amount continue to
Water filling in water injection well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610806326.2A CN106367052A (en) | 2016-09-07 | 2016-09-07 | Decompression and augmented injection agent for water injection well as well as preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610806326.2A CN106367052A (en) | 2016-09-07 | 2016-09-07 | Decompression and augmented injection agent for water injection well as well as preparation method and application thereof |
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| CN106367052A true CN106367052A (en) | 2017-02-01 |
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| CN201610806326.2A Pending CN106367052A (en) | 2016-09-07 | 2016-09-07 | Decompression and augmented injection agent for water injection well as well as preparation method and application thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107892908A (en) * | 2017-11-23 | 2018-04-10 | 克拉玛依新科澳石油天然气技术股份有限公司 | Water injection well unblocking and injection increasing agent and preparation method thereof |
| CN108517204A (en) * | 2018-04-11 | 2018-09-11 | 扬州润达油田化学剂有限公司 | A kind of three-in-one acidification blocking remover and its application process for de-plugging of well |
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| WO2000040667A1 (en) * | 1998-12-31 | 2000-07-13 | Schlumberger Technology Corporation | Fluids and techniques for hydrocarbon well completion |
| CN101092559A (en) * | 2006-06-24 | 2007-12-26 | 常彦荣 | Water flooding added agent in use for watering oil field, and preparation method |
| CN102703045A (en) * | 2012-06-18 | 2012-10-03 | 长江大学 | Multi-slug composite pressure decreasing and injection increasing agent for ultra-low permeability oil field |
| CN101974322B (en) * | 2010-11-01 | 2013-03-20 | 中国石油大学(华东) | Chelating acid of sandstone |
| CN102250603B (en) * | 2011-05-06 | 2013-06-26 | 河北科技大学 | Separated injection oil well composite blocking remover and injection method thereof |
| CN105602540A (en) * | 2016-01-29 | 2016-05-25 | 中国石油天然气股份有限公司 | Dense oil reservoir under injection well treatment method |
-
2016
- 2016-09-07 CN CN201610806326.2A patent/CN106367052A/en active Pending
Patent Citations (6)
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|---|---|---|---|---|
| WO2000040667A1 (en) * | 1998-12-31 | 2000-07-13 | Schlumberger Technology Corporation | Fluids and techniques for hydrocarbon well completion |
| CN101092559A (en) * | 2006-06-24 | 2007-12-26 | 常彦荣 | Water flooding added agent in use for watering oil field, and preparation method |
| CN101974322B (en) * | 2010-11-01 | 2013-03-20 | 中国石油大学(华东) | Chelating acid of sandstone |
| CN102250603B (en) * | 2011-05-06 | 2013-06-26 | 河北科技大学 | Separated injection oil well composite blocking remover and injection method thereof |
| CN102703045A (en) * | 2012-06-18 | 2012-10-03 | 长江大学 | Multi-slug composite pressure decreasing and injection increasing agent for ultra-low permeability oil field |
| CN105602540A (en) * | 2016-01-29 | 2016-05-25 | 中国石油天然气股份有限公司 | Dense oil reservoir under injection well treatment method |
Non-Patent Citations (3)
| Title |
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| 《中国油气田开发志》总编纂委员会: "《中国油气田开发志.卷12.长庆油气区卷》", 30 September 2011 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107892908A (en) * | 2017-11-23 | 2018-04-10 | 克拉玛依新科澳石油天然气技术股份有限公司 | Water injection well unblocking and injection increasing agent and preparation method thereof |
| CN108517204A (en) * | 2018-04-11 | 2018-09-11 | 扬州润达油田化学剂有限公司 | A kind of three-in-one acidification blocking remover and its application process for de-plugging of well |
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Application publication date: 20170201 |
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