CN101538457B - Input well composite blockage relieving agent and preparation method thereof - Google Patents
Input well composite blockage relieving agent and preparation method thereof Download PDFInfo
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- CN101538457B CN101538457B CN2009100831362A CN200910083136A CN101538457B CN 101538457 B CN101538457 B CN 101538457B CN 2009100831362 A CN2009100831362 A CN 2009100831362A CN 200910083136 A CN200910083136 A CN 200910083136A CN 101538457 B CN101538457 B CN 101538457B
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Abstract
The invention relates to an input well composite blockage relieving agent that is applicable to water injection of an oil well in an oil field. The input well composite blockage relieving agent is a water-injection chemical treating agent. The invention is characterized in that the input well composite blockage relieving agent comprises the following ingredients according to the parts by weight: 12-18 parts of Ethylene Diamine Tetra (Methylene Phosphonic Acid) Sodium, 5-7.5 parts of phosphoric acid, 1.5-3.0 parts of sodium nitrite, 20-30 parts of polyethylenetertoctylphenolic ether, 1-1.5 parts of potassium chloride, 0.05-0.1 part of Vitamin C, 0.05-0.1 part of BOC-L-glutamine and 43-54 parts of water. The invention has the effects that the input well composite blockage relieving agent helps to corrupting and dissolving blockage matter and improving seepage rate, in addition, the wellhead pressure of the input well is reduced by 15-20 percentage points when the adding amount is 0.1-0.3%.
Description
Technical field
The invention belongs to petroleum industry chemical technical field, particularly oil-field flooding treatment agent technical field is prescription of a kind of input well composite blockage relieving agent and preparation method thereof.
Background technology
At present, part sandstone plum oil reservoir injection well, because reservoir choke, the superpressure water filling often takes place.Be the hard nut to crack of puzzlement oilfield water extraction always, not only produce to the oil field and caused serious potential safety hazard, and make the stable yields basis in oil field not firm that field use is crossed many technological measures for many years, effect is all undesirable.
Having set forth a kind of input well composite blockage relieving agent in multiple-effect input well composite blockage relieving agent one literary composition that the Lu Zhonghai of Henan Oil Field Chinese Academy of Engineering etc. delivered on 2006 the 5th phases " oil-gas field surface engineering " is that " at machine solvent+tensio-active agent+sequestrant+clay stabilizer " is after Henan Oil Field is used, reach the raising rate of permeation, increased the purpose of water injection rate.
Summary of the invention
The objective of the invention is: a kind of input well composite blockage relieving agent is provided, uses input well composite blockage relieving agent in water injection well, corrosion, dissolving tamper are removed the organic and inorganic tamper of part, reach the raising rate of permeation, increase water injection rate.
The technical scheme of pressure reducing and injection increasing agent used for flooding well of the present invention is:
One, the raw material of input well composite blockage relieving agent and prescription:
Raw material comprises:
1, ethylene diamine tetra methylene phosphonic acid sodium
Molecular formula: C
6H
12O
12N
2P
4Na
8
Structural formula:
Character: this product is nitrogenous organic multicomponent phosphonic acids, belongs to the cathode type inhibiter, compares with inorganic polyphosphate, and corrosion inhibition rate is high 3～5 times.Can be miscible with water, nontoxic pollution-free, chemical stability and temperature tolerance are good, and good scale inhibition effect is arranged under 200 ℃.In the aqueous solution, can be dissociated into 8 negative ions, thus can with two or more metal ion-chelants, form the netted complex compound of two or more monomer structure macromole, loosely is scattered in the water, makes calcium dirt normal crystallization destroyed.EDTMPS is good to the scale inhibition effect of calcium sulfate, barium sulfate scale.
Purposes: be used for the corrosion inhibiting and descaling agent of recirculated water and feedwater, complexing agent, textile printing and dyeing industry sequestrant and the hydrogen peroxide bleaching stabilizer of cyanideless electro-plating.When in recirculated cooling water, adding separately, general dosage 2～10mg/L.With HPMA in 1: 3 ratio composite after, can be used for water treatment in the low pressure boiler stove.This product also can with composite uses such as BTA, PAAS, zinc salt.
2, phosphoric acid (industrial goods)
3, Sodium Nitrite (industrial goods);
4, polyoxyethylene uncle octylphenol ether; (industrial goods) (Huang Hongzhou edits Chinese tensio-active agent overview one book, the 342nd page of Chemical Industry Press);
Molecular formula: C
14H
21O (C
2H
4O)
nH (n=10)
Character: colourless, tasteless, transparent thick liquid is nontoxic, nonflammable, water-soluble.
Purposes: be mainly used in emulsifying agent, dispersion agent, washing composition and viscosity-depression agent
5, Repone K (industrial goods);
6, vitamins C (industrial goods);
7, BOC-L-glutamine (industrial goods);
Molecular structure
Molecular formula C
10H
18N
2O
5
8, water
Each ingredients weight parts ratio of input well composite blockage relieving agent is:
1, ethylene diamine tetra methylene phosphonic acid sodium (industrial goods): 12～18 parts;
2, phosphoric acid (industrial goods): 5～7.5 parts;
3, Sodium Nitrite (industrial goods): 1.5～3.0 parts;
4, polyoxyethylene uncle octylphenol ether (industrial goods): 20～30 parts
5, Repone K (industrial goods) is 1～1.5 part;
6, vitamins C (industrial goods) is 0.05～0.1 part;
7, BOC-L-glutamine (industrial goods): 0.05～0.1 part;
8, water: 43～54 parts.
Two, the production method of input well composite blockage relieving agent
Major equipment:
Enamel reaction still with 2000L of stirring, heating, cooling and vacuum system.
Production method:
At first, polyoxyethylene uncle octylphenol ether is added enamel reaction still in proportion.Slowly be warmed up to 75～80 ℃.Secondly, elder generation adds 10% water under constantly stirring, continue to stir after 30 minutes, slowly be cooled to 50～55 ℃, add ethylene diamine tetra methylene phosphonic acid sodium, phosphoric acid more successively in proportion, the limit edged stirs, add Sodium Nitrite, vitamins C then successively in proportion, stir after 30 minutes, add at last Repone K, BOC-L-glutamine, remaining water in proportion and stir and stop heating after 30 minutes, stir while cooling off, be cooled to normal temperature.Obtain input well composite blockage relieving agent.
The invention has the beneficial effects as follows: input well composite blockage relieving agent is applicable to the step-down augmented injection of water injection well in oil fields, help corrosion, dissolving tamper, improve rate of permeation, be under 0.1～0.3% the situation at dosage, the water injection well wellhead pressure descends 15～20 percentage points, the water yield of injecting remains unchanged, and promptly under the situation that the water yield of injecting remains unchanged, wellhead pressure can descend 15～20 percentage points.
Embodiment
Embodiment 1
Each ingredients weight parts ratio of input well composite blockage relieving agent is:
1, ethylene diamine tetra methylene phosphonic acid sodium (industrial goods): 13 parts;
2, phosphoric acid (industrial goods): 5.3 parts;
3, Sodium Nitrite (industrial goods): 1.9 parts;
4, polyoxyethylene uncle octylphenol ether (industrial goods): 29 parts
5, Repone K (industrial goods) is 1.1 parts;
6, vitamins C (industrial goods) is 0.06 part;
7, BOC-L-glutamine (industrial goods): 0.07 part;
8, water: 51 parts.
Preparation method: at first, polyoxyethylene uncle octylphenol ether is added enamel reaction still in proportion, slowly be warmed up to 77 ℃; Secondly, add 10% water earlier under constantly stirring, continue to stir after 30 minutes, slowly be cooled to 53 ℃, add ethylene diamine tetra methylene phosphonic acid sodium, phosphoric acid more successively in proportion, the limit edged stirs; Add Sodium Nitrite, vitamins C then successively in proportion, stir after 30 minutes, add at last Repone K, BOC-L-glutamine, remaining water in proportion and stir and stop heating after 30 minutes, stirring while cool off, be cooled to normal temperature, obtain input well composite blockage relieving agent.
After certain water injection well was used input well composite blockage relieving agent, the water injection well wellhead pressure descended 18.25 percentage points, and volume of water input is identical.
Embodiment 2
Input well composite blockage relieving agent, identical with the preparation method of embodiment 1, each ingredients weight parts ratio is:
1, ethylene diamine tetra methylene phosphonic acid sodium (industrial goods): 14.5 parts;
2, phosphoric acid (industrial goods): 5.8 parts;
3, Sodium Nitrite (industrial goods): 2.3 parts;
4, polyoxyethylene uncle octylphenol ether (industrial goods): 27 parts
5, Repone K (industrial goods) is 1.2 parts;
6, vitamins C (industrial goods) is 0.06 part;
7, BOC-L-glutamine (industrial goods): 0.07 part;
8, water: 49 parts.
After certain water injection well was used input well composite blockage relieving agent, the water injection well wellhead pressure descended 19.31 percentage points, and volume of water input is identical.
Embodiment 3
Identical with the preparation method of embodiment 1, each ingredients weight parts ratio is:
1, ethylene diamine tetra methylene phosphonic acid sodium (industrial goods): 16 parts;
2, phosphoric acid (industrial goods): 6.4 parts;
3, Sodium Nitrite (industrial goods): 2.3 parts;
4, polyoxyethylene uncle octylphenol ether (industrial goods): 25 parts
5, Repone K (industrial goods) is 1.2 parts;
6, vitamins C (industrial goods) is 0.07 part;
7, BOC-L-glutamine (industrial goods): 0.08 part;
8, water: 49 parts.
After water injection well was used input well composite blockage relieving agent, the water injection well wellhead pressure descended 19.4 percentage points, and volume of water input is identical.
Embodiment 4
Identical with the preparation method of embodiment 1, each ingredients weight parts ratio is:
1, ethylene diamine tetra methylene phosphonic acid sodium (industrial goods): 17 parts;
2, phosphoric acid (industrial goods): 7 parts;
3, Sodium Nitrite (industrial goods): 2.5 parts;
4, polyoxyethylene uncle octylphenol ether (industrial goods): 23 parts
5, Repone K (industrial goods) is 1.25 parts;
6, vitamins C (industrial goods) is 0.07 part;
7, BOC-L-glutamine (industrial goods): 0.09 part;
8, water: 49 parts.
After water injection well was used input well composite blockage relieving agent, the water injection well wellhead pressure descended 13.55 percentage points, and volume of water input is identical.
Embodiment 5
Identical with the preparation method of embodiment 1, each ingredients weight parts ratio is:
1, ethylene diamine tetra methylene phosphonic acid sodium (industrial goods): 18 parts;
2, phosphoric acid (industrial goods): 7.4 parts;
3, Sodium Nitrite (industrial goods): 2.9 parts;
4, polyoxyethylene uncle octylphenol ether (industrial goods): 21 parts
5, Repone K (industrial goods) is 1.36 parts;
6, vitamins C (industrial goods) is 0.09 part;
7, BOC-L-glutamine (industrial goods): 0.09 part;
8, water: 45 parts.
After certain water injection well was used input well composite blockage relieving agent, the water injection well wellhead pressure descended 16.35 percentage points, and volume of water input is identical.
Claims (1)
1. input well composite blockage relieving agent, it is characterized in that: each ingredients weight parts ratio is:
Ethylene diamine tetra methylene phosphonic acid sodium: 12～18 parts;
Phosphoric acid: 5～7.5 parts;
Sodium Nitrite: 1.5～3.0 parts;
Polyoxyethylene uncle octylphenol ether, molecular formula: C
14H
21O (C
2H
4O)
nH, n=10:20～30 part;
Repone K: 1～1.5 part;
Vitamins C: 0.05～0.1 part;
BOC-L-glutamine: 0.05～0.1 part;
Water: 43～54 parts;
Its preparation method is: at first, polyoxyethylene uncle octylphenol ether is added enamel reaction still in proportion, slowly be warmed up to 75～80 ℃; Secondly, add 10% water earlier under constantly stirring, continue to stir after 30 minutes, slowly be cooled to 50～55 ℃, add ethylene diamine tetra methylene phosphonic acid sodium, phosphoric acid more successively in proportion, the limit edged stirs; Add Sodium Nitrite, vitamins C then successively in proportion, stir after 30 minutes, add at last Repone K, BOC-L-glutamine, remaining water in proportion, stir and stop heating after 30 minutes, stir while cooling off, be cooled to normal temperature, obtain input well composite blockage relieving agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100831362A CN101538457B (en) | 2009-04-30 | 2009-04-30 | Input well composite blockage relieving agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100831362A CN101538457B (en) | 2009-04-30 | 2009-04-30 | Input well composite blockage relieving agent and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101538457A CN101538457A (en) | 2009-09-23 |
| CN101538457B true CN101538457B (en) | 2011-08-03 |
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|---|---|---|---|
| CN2009100831362A Active CN101538457B (en) | 2009-04-30 | 2009-04-30 | Input well composite blockage relieving agent and preparation method thereof |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102311728B (en) * | 2010-07-06 | 2014-04-02 | 中国石油天然气股份有限公司 | Chemical pressure-reducing injection-increasing agent for injection well and preparation and use thereof |
| CN102093865B (en) * | 2010-12-21 | 2013-07-10 | 中国石油天然气股份有限公司 | Blocking remover for polymer pollutants |
| CN102634332B (en) * | 2012-03-26 | 2014-02-19 | 中国石油天然气股份有限公司 | Blockage remover for decompression and steam injection in high clay content sandstone oil reservoir |
| CN104789200A (en) * | 2015-04-09 | 2015-07-22 | 中国石油集团渤海钻探工程有限公司 | Blockage removal agent for barite pollution of oil-gas well |
| CN106520103B (en) * | 2016-09-27 | 2019-07-05 | 中国石油天然气股份有限公司 | A kind of scale remover and preparation method thereof for the long-acting increasing injection of water injection well |
| CN111550215A (en) * | 2020-04-22 | 2020-08-18 | 中海油田服务股份有限公司 | Coiled tubing plug removal method suitable for offshore oilfield water injection well |
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