CN102604617A - Carbonate scale removing agent for oil-water well - Google Patents
Carbonate scale removing agent for oil-water well Download PDFInfo
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- CN102604617A CN102604617A CN2011103152568A CN201110315256A CN102604617A CN 102604617 A CN102604617 A CN 102604617A CN 2011103152568 A CN2011103152568 A CN 2011103152568A CN 201110315256 A CN201110315256 A CN 201110315256A CN 102604617 A CN102604617 A CN 102604617A
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Abstract
The invention relates to a carbonate scale removing agent for an oil-water well, belonging to the technical field of development of oilfields. The carbonate scale removing agent is formed by mixing a penetrating agent, a scale dissolving agent, an oil washing agent, a descaling synergist, an anti-clay swelling agent and water. The carbonate scale removing agent has the beneficial effects of having two functions of chemical descaling and stripping dispersion, greatly increasing the scale dissolving speed and obviously increasing the scale dissolving quantity. 1) The scale removing agent accelerates the wetting of scale water, enables hard scales to become loose, increases the contact area between the dissolving agent and the scales, and is conducive to stripping off the scales; 2) the scale removing agent can generate stable water-soluble substances with the carbonate scales; 3) the scale removing agent can remove oily matters on the surfaces of the scales; and 4) the scale removing agent has an anti-clay swelling function and can effectively protect a construction stratum.
Description
Technical field
The present invention relates to a kind of oil and water well carbonate scale remover, belong to the oil-field development technical field.
Background technology
At present, the oil field is in the high water-cut development later stage mostly both at home and abroad, and the oil and water well fouling is outstanding, causes the oil well underproduction, and WIW water injection pressure rising water injection rate descends.Through the analysis to dirty composition, mainly by being made up of carbonate such as lime carbonate and magnesiumcarbonate, other contains a spot of oil.Present oil field descaling method commonly used: the one, mechanical descaling, mechanical descaling are after the operation of fouling tubing string is tripped out, and carry out after the scale removal of ground RIH again, Technology is complicated, expense is high, efficient is low, can not remove the dirty thing of wellbore again, seldom adopts; The 2nd, chemical cleaning comprises pickling, sequestrant solvent cleaning, big acyclic polyether compound solution cleaning etc.Like application number is 98113041.0 to disclose oil pipe stain eliminating technology, and its whole technology comprises caustic wash process, acidic descaling agent scale removal operation; Alkalescence chelating scale removal operation; Aided processes etc., its technological operation is complicated, the scale removal time is long, dirty meltage is little, has certain weak points such as corrodibility.Application number is 200910143903.4 to disclose a kind of organic descaling composition, is made up of organic washing agent and inhibiter CM-911, and the weight ratio of said organic washing agent and inhibiter is 100: 0.1～0.3.Said organic washing agent; By weight; Contain maleic acid-acrylic acid copolymer (MA-AA) 1%～15%, hydroxy ethylene diphosphonic acid (HEDP) 1%～25%, ATMP (ATMP) 2%～30%, penetrating agent JFC 0.3 ‰～5 ‰, surplus is a water.Because it adopts organic acid, exist down-hole string corrosive defective.
Summary of the invention
The technological operation complicacy, scale removal time length, the dirty meltage that the objective of the invention is to remedy above-mentioned technology existence are little; To down-hole string corrosive weak point; Provide a kind of and both can carry out the ground scale removal, the oil and water well carbonate scale remover that can carry out scale removal to oil and water well in producing again.
The present invention can reach through following technical scheme:
A kind of oil and water well carbonate scale remover is mixed by permeate agent, dirty solvating agent, detergent, scale removal synergistic agent, anti-clay swelling agent and water, wherein:
Described permeate agent is a maleic acid di-sec-octyl sodium sulfonate;
Described dirty solvating agent mass content is 6%-8%, is EDTA Disodium;
Described detergent is sulfonated petro-leum, dodecyl alcohol polyoxyethylene ether sodium sulfate and dodecyl alcohol polyoxyethylene ether.
The mass content of said sulfonated petro-leum is 0.1%-0.2%.
The mass content of said dodecyl alcohol polyoxyethylene ether sodium sulfate is 0.05%-0.1%.
Described dodecyl alcohol polyoxyethylene ether mass content is 0.03-0.06%.
Described scale removal synergistic agent mass content is 8.4%-14%, and wherein, the Potassium monofluoride mass content is 5%-7%; The sodium oxalate mass content is 2%-4%; Described ammonium persulphate, its mass content are 1.4%-3%.
Described anti-clay swelling agent is trimethyl benzyl ammonia chloride, ammonium chloride or oxyaluminum; The mass content of trimethyl benzyl ammonia chloride is 1.0%-2.0%, and ammonium chloride is 2%-4%, and oxyaluminum is 0.3%-0.5%.
The present invention possesses the chemical solution dirt and disperses two kinds of functions with peeling off, and dissolved dirt speed is significantly promoted, and dissolving the dirt amount obviously increases.The one, dirty water-wet is quickened in this scale removal, makes the dirt of hard become loose, has increased solvating agent and dirty contact area, helps peeling off of dirt; The 2nd, this scale remover can generate stable water-soluble substances with carbonate scale; The 3rd, the oil on this scale remover ability scale removal dirt surface; The 4th, this scale remover has anti-clay swelling effect, can effectively protect the construction stratum.
Embodiment
Embodiment one: the present invention is mixed by permeate agent, dirty solvating agent, detergent, scale removal synergistic agent, anti-clay swelling agent and water, wherein:
Permeate agent maleic acid di-sec-octyl sodium sulfonate; Dirt solvating agent EDTA Disodium; Detergent is a sulfonated petro-leum; The scale removal synergistic agent is a Potassium monofluoride, and its mass percent is: maleic acid di-sec-octyl sodium sulfonate: EDTA Disodium: sulfonated petro-leum: Potassium monofluoride: water is 0.2: 6: 0.1: 5: 88.7.
When scale remover is used for except that near the carbonate scale stratum and the borehole, can add anti-clay swelling agent, quality hundred ratio contents of general trimethyl benzyl ammonia chloride are that 1.0%-2.0% or ammonium chloride are that 2%-4% or its aluminium of hydroxyl are 0.3%-0.5%.
According to the fouling degree of oil and water well, the subordinate list 1 given embodiment well carbonate scale remover that makes up oil injects oil and water well fouling zone of interest or fouling tubing string, reacts after 4-8 hour, gets final product opening well and making production.
Through experiment: Zhongyuan Oil Field Pu 7-175 well oil reservoir injects scale remover 3 sides of the present invention, and increase day by day 9.0 tons of liquid of measure increase day by day oily 3.0 tons.Production fluid, produce oil descend again to some extent behind this well production some months, carry out the neutral scale removal of the fixed tubular column second time by the end of September again, and production fluid, produce oil go up to some extent, and moisture variation is little.This well accumulative total increases 1155 tons of liquid, increases 275.4 tons of oil, validity period 216 days, and pump detection period is present more than 210 days by extending in 60 days, and input-output ratio reaches 1: 91.7.
Zhongyuan Oil Field Pu 1-342 well casing post is because fouling causes the standing valve leakage; Inject scale remover 2 sides of the present invention, day production fluid, daily output oil content do not rise 8.9 tons and 0.4 ton, 0.1 percentage point of moisture rising; Pump efficiency rises to 86.8% by 55.4%, has obtained obviously to increase the liquid effect.
Subordinate list one
Claims (9)
1. an oil and water well carbonate scale remover is mixed by permeate agent, dirty solvating agent, detergent, scale removal synergistic agent, anti-clay swelling agent and water, it is characterized in that:
Described permeate agent is a maleic acid di-sec-octyl sodium sulfonate;
Described dirty solvating agent is an EDTA Disodium;
Described detergent is sulfonated petro-leum, dodecyl alcohol polyoxyethylene ether sodium sulfate or dodecyl alcohol polyoxyethylene ether;
Described scale removal synergistic agent is Potassium monofluoride, sodium oxalate or ammonium persulphate.
2. a kind of oil and water well carbonate scale remover according to claim 1, it is characterized in that: the mass content of described maleic acid di-sec-octyl sodium sulfonate is 0.1%-0.2%.
3. a kind of oil and water well carbonate scale remover according to claim 1, it is characterized in that: the mass content that described dirty solvating agent is an EDTA Disodium is 6%-8%.
4. a kind of oil well carbonate scale remover according to claim 1, it is characterized in that: the mass content of described sulfonated petro-leum is 0.1%-0.2%.
5. a kind of oil well carbonate scale remover according to claim 1, it is characterized in that: the mass content of described dodecyl alcohol polyoxyethylene ether sodium sulfate is 0.05%-0.1%.
6. a kind of oil well carbonate scale remover according to claim 1 is characterized in that: described dodecyl alcohol polyoxyethylene ether mass content is 0.03-0.06%.
7. a kind of oil well carbonate scale remover according to claim 1 is characterized in that: described scale removal synergistic agent mass content is 8.4%-14%.
8. a kind of oil well carbonate scale remover according to claim 1 is characterized in that: described anti-clay swelling agent is trimethyl benzyl ammonia chloride, ammonium chloride or oxyaluminum.
9. according to claim 1 or 8 described a kind of oil well carbonate scale removers, it is characterized in that: wherein, the mass content of trimethyl benzyl ammonia chloride is 1.0%-2.0%, and ammonium chloride is 2%-4%, and oxyaluminum is 0.3%-0.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011103152568A CN102604617A (en) | 2011-10-17 | 2011-10-17 | Carbonate scale removing agent for oil-water well |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103152568A CN102604617A (en) | 2011-10-17 | 2011-10-17 | Carbonate scale removing agent for oil-water well |
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| CN102604617A true CN102604617A (en) | 2012-07-25 |
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| CN2011103152568A Pending CN102604617A (en) | 2011-10-17 | 2011-10-17 | Carbonate scale removing agent for oil-water well |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103834377A (en) * | 2014-03-11 | 2014-06-04 | 范金彪 | Scale prevention blocking remover for ternary composite water dependent well |
| CN104479662A (en) * | 2014-11-28 | 2015-04-01 | 中国石油天然气股份有限公司 | Barium-strontium scale remover for oilfield digital pressurization pry |
| CN106634914A (en) * | 2016-12-09 | 2017-05-10 | 西南石油大学 | Working fluid system applicable to water-base drilling fluid filter cake removal before well cementing |
| CN107324512A (en) * | 2017-07-05 | 2017-11-07 | 韶关市雅鲁环保实业有限公司 | The fouling cleaning agent and cleaning method of iron-smelter flushing cinder water system |
| CN108017545A (en) * | 2017-12-16 | 2018-05-11 | 保定市三拓化工产品有限公司 | A kind of new organic quaternary amine of shale control agent cation and preparation method thereof |
| CN108641694A (en) * | 2018-04-27 | 2018-10-12 | 长江大学 | A kind of oil well descaling agent and preparation method thereof |
| CN114316936A (en) * | 2022-03-15 | 2022-04-12 | 华睿致诚化学(山东)有限公司 | Bifunctional depolymerization scale dissolver for oil extraction and preparation and application thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103834377A (en) * | 2014-03-11 | 2014-06-04 | 范金彪 | Scale prevention blocking remover for ternary composite water dependent well |
| CN104479662A (en) * | 2014-11-28 | 2015-04-01 | 中国石油天然气股份有限公司 | Barium-strontium scale remover for oilfield digital pressurization pry |
| CN104479662B (en) * | 2014-11-28 | 2017-10-17 | 中国石油天然气股份有限公司 | A kind of oil field digitlization supercharging sled barium strontium descaling agent |
| CN106634914A (en) * | 2016-12-09 | 2017-05-10 | 西南石油大学 | Working fluid system applicable to water-base drilling fluid filter cake removal before well cementing |
| CN106634914B (en) * | 2016-12-09 | 2017-09-19 | 西南石油大学 | The working solution system removed suitable for water-base drilling fluid filter cake before well cementation |
| CN107324512A (en) * | 2017-07-05 | 2017-11-07 | 韶关市雅鲁环保实业有限公司 | The fouling cleaning agent and cleaning method of iron-smelter flushing cinder water system |
| CN107324512B (en) * | 2017-07-05 | 2020-06-30 | 韶关市雅鲁环保实业有限公司 | Scale cleaning agent and cleaning method for slag flushing water system of iron works |
| CN108017545A (en) * | 2017-12-16 | 2018-05-11 | 保定市三拓化工产品有限公司 | A kind of new organic quaternary amine of shale control agent cation and preparation method thereof |
| CN108641694A (en) * | 2018-04-27 | 2018-10-12 | 长江大学 | A kind of oil well descaling agent and preparation method thereof |
| CN114316936A (en) * | 2022-03-15 | 2022-04-12 | 华睿致诚化学(山东)有限公司 | Bifunctional depolymerization scale dissolver for oil extraction and preparation and application thereof |
| CN114316936B (en) * | 2022-03-15 | 2022-05-13 | 华睿致诚化学(山东)有限公司 | Bifunctional depolymerization scale dissolver for oil extraction, and preparation and application thereof |
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Application publication date: 20120725 |
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