CN101608110B - Compound blockage relieving agent and using method thereof - Google Patents
Compound blockage relieving agent and using method thereof Download PDFInfo
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- CN101608110B CN101608110B CN2009100233369A CN200910023336A CN101608110B CN 101608110 B CN101608110 B CN 101608110B CN 2009100233369 A CN2009100233369 A CN 2009100233369A CN 200910023336 A CN200910023336 A CN 200910023336A CN 101608110 B CN101608110 B CN 101608110B
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Abstract
The invention provides a compound blockage relieving agent, which comprises an A agent, a B agent and a C agent. The A agent is chlorine dioxide solution, and is chlorite or chlorate; the B agent is in a non-acid solid active agent system, and comprises organic oisocyanuric acid salt, inorganic sulfate and chlorate; and the C agent is an organic inhibitor for resisting oxidation corrosion of chlorine dioxide, and is organic phosphine. A using method comprises the following steps: the compound blockage relieving agent which is generated through fast activation aboveground and is based on the chlorine dioxide is wholly injected into an oil well formation fin one step through a bushing, then water is injected through the bushing, the chlorine dioxide compound blockage relieving agent with higher concentration after being activated is extruded into a perforation section, polymer of an oil layer is in oxidative degradation, and various bacterial microorganisms bred by raw oil and sulfide are oxidized and completely killed, thereby the invention achieves the purpose of eliminating blockage, has the characteristic that faint yellow liquid based on the chlorine dioxide of high concentration is generated through the fast activation, has no large quantity of chlorine dioxide gas escape, and can be widely used for fields such as oil well blockage relieving, water well blockage relieving, and the like.
Description
Technical field
The present invention relates to a kind of de-plugging of well agent that is used for field produces, be specifically related to a kind of composite blockage relieving agent and method of use thereof.
Background technology
The oil field is in the Development and Production process, and each item technological processs such as drilling well, oil-gas mining have all adopted a large amount of chemical, mainly contains mineral substance, natural materials, organism, inorganics, macromolecular material etc.Along with the injection of chemical, because the influence of oil bearing formation property and the many factors of performance history, obstruction in various degree can appear in nearly well hydrocarbon zone.Oil-well strata has depositions such as a large amount of bacterium generations, superpolymer, causes formation pore to stop up, and equipment stops up; Cause injecting the well fluid injection and press liter; IR descends, so that is difficult to inject, and causes the producing well oil offtake to descend; Usually the tamper of oil reservoir needs effectively to remove, to improve oil and gas production.
According to the character of hydrocarbon zone,, take corresponding de-plugging measure to the major cause of stopping up.The de-plugging measure has physical method, like the high-pressure hydraulic impulse oscillation; The mechanical technology method is like pressure break; Chemical process, like acidifying, oxidizing microorganisms etc., the obstruction that near wellbore formation occurs all can alleviated or eliminate to these methods, recovers the throughput of oil, well.
China's oilfield chemistry de-plugging is main with acidifying mainly, but the acidifying technology is mainly used in inorganics obstruction in the releasing oil reservoir, and is powerless to organic high molecular polymer.Practice shows that the acidizing effect after the repeatedly acidifying descends or is invalid, in seriously having influenced, the waterflooding degree of low permeability oil field.
Over past ten years, domestic each elephant development is with dioxide peroxide (ClO
2) technology carries out the oilfield chemistry de-plugging.Dioxide peroxide is a kind of strong oxidizing property gas, and the chlorine in the dioxide peroxide is to exist with positive tetravalence attitude, and its activity is 2.63 times of chlorine, and promptly the available chlorine content of chlorine is 100%, and the available chlorine content of dioxide peroxide is 263%.There is not paired unbound electron in the outer key territory of dioxide peroxide molecule, has extremely strong oxidation capacity and extremely strong sterilizing power.Dioxide peroxide oxidation organic polymer and nodule effectively makes its degraded, and the enzyme in the oxidation cell walls decomposes the amino-acid oxidase of cell protein, thereby makes bacterial death effectively.
Utilize the strong oxidation characteristic of dioxide peroxide, carry out the oilfield chemistry de-plugging, the high molecular polymer in thickened oil, the well; Make macromolecules degradation; Viscosity degradation, and being removed effectively stops up as removing polymer polymers such as guanidine glue that pressure break and polymer flooding use, sesbania gum, SEPIGEL 305.The various bacterial plugging things that crude oil and sulfide lead to are also thoroughly killed in the dioxide peroxide oxidation; Like the sulphate reducing bacteria (SRB) that in local water and waterflood system, exists, saprophytic microorganism (TGB) iron bacteria (IB), algae etc.; In having improved effectively, the WIW of low permeability oil field, oil development degree, improve the raising the output that RF realizes crude oil and Sweet natural gas.
At present domestic each elephant adopts the dioxide peroxide composite blockage relieving agent to carry out oil, well de-plugging; Because dioxide peroxide is a kind of strong oxidizing property gas; So all be to use the scene with the stable ClO 2 solution activation usually, promptly the on-site prepn dioxide peroxide is claimed the activation dioxide peroxide; Generally all take ClO 2 solution and acid solution segmentation to inject the down-hole, the technological method of acid activation dioxide peroxide carries out oil field de-plugging construction in the down-hole.
Usually use stable ClO 2 solution as being host, use monobasics such as hydrochloric acid, sulfuric acid, phosphoric acid, formic acid, acetate, oxalic acid, binary, triprotic acid to be acvator activation dioxide peroxide (promptly synthetic preparation dioxide peroxide).Acids acvator reactivation process dioxide peroxide transformation efficiency is decided by the pH value of stable ClO 2 solution, hydrochloric acid PH2.1, and the dioxide peroxide transformation efficiency about 64% in 8 hours; PH2.1; 0.5 hour dioxide peroxide transformation efficiency only 23%, but hydrochloric acid is extremely strong corrosive liquid, exists equipment by the severe corrosive problem; Organic Hydrocerol A PH2.5, the dioxide peroxide transformation efficiency about 7.5% in 0.5 hour.
There is following shortcoming in acids acvator activation construction technology: one, segmentation is injected, and is generally segmentation and alternately injects, and divides a plurality of circulations successively various medicaments to be injected.Oil field dioxide peroxide acidification technique is general to divide three sections or five sections to inject down-holes, and general one section three sections five sections is acid solution, and two sections four sections is the stable chlorine dioxide aqueous solution, and in the down-hole activation dioxide peroxide.Stability chlorine dioxide concentration is generally 2000mg/L～3000mg/L, looks oil, well difference, and a shot is that 5T～20T does not wait.Because segmentation is injected; The whole story, two ends were acid; The stable chlorine dioxide solution section of injecting of mediating; Then ClO 2 solution can not with the whole uniform contact of acid, then dioxide peroxide can not be by the whole activation of the concentration of setting, and just can not produce the immediate vicinity of wellbore that dioxide peroxide after the activation of q.s is injected into oil, well.Two, the acvator acid solution is generally strong acid, generally want to use behind the dilute with water, pH value be not under the very low condition fully the activation dioxide peroxide need several hours, the transformation efficiency dioxide peroxide is lower.Three, acid replaces with ClO 2 solution that the activatory chlorine dioxide concentration is very high at the interface, corrodibility is very strong, and oil, well sleeve pipe, tube corrosion are serious, startling.Four, if after ground is with chlorine dioxide activation, inject the stratum, the danger and the dioxide peroxide that exist the chlorine dioxide blast damage human respiratory.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of composite blockage relieving agent and method of use thereof, this composite blockage relieving agent has the characteristic that fast activating generates high concentration of chlorine dioxide, and does not have a large amount of chlorine dioxides and overflow; This method for removing blockage have disposable whole injection activatory dioxide peroxide be main composite blockage relieving agent to the oil well bottom, simple to operate, de-plugging is characteristic safely and efficiently.
In order to achieve the above object, the technical scheme of the present invention's employing is:
A kind of composite blockage relieving agent is made up of A agent, B agent and C agent, and the A agent is a stable ClO 2 solution; The B agent is non-sour solid activating agent system; The C agent is the antioxygen inhibiter, and the mass ratio of its A agent, B agent and C agent is 100: (4～6): (10～30).
Described A agent is that mass fraction is the stable ClO 2 solution of 2-10%.
Described B agent is made up of organic isocyanurate, mineral sulfates and oxymuriate, and the organic isocyanurate in the B agent is dichloroisocyanuric acid sodium or TCCA, and its quality accounts for B agent 30-50%; Mineral sulfates in the B agent is the one or more combination of sal epsom, sodium pyrosulfate, sodium sulfate, accounts for B agent 15-50%; Oxymuriate is a calcium chloride, and its quality accounts for B agent 20-40%.
Described C agent is that mass fraction is hexanediamine tetramethyl fork phosphonic acids, HEDP sodium, HEDP, 2-phosphonic acids butane-1,2,4-tricarboxylic acid or the divalent alcohol SULPHOSUCCINIC ACID ESTER of 5-35%.
A kind of method of use of composite blockage relieving agent, the concrete use may further comprise the steps:
The first step is injected the down-hole through sleeve pipe with spearhead water 5-10T;
Second step, the consumption of selection unblocking agent A agent, every 1m oil reservoir is with A agent 200kg, and the consumption of corresponding B agent and C agent;
In the 3rd step, be that 100 parts A agent adds in the storage tank with the mass fraction that chooses, and be diluted with water to 2000mg/L～3000mg/L;
In the 4th step, taking by weighing mass fraction is the B agent of 4-6 part, adds in the storage tank contain the aqueous solution behind the A dilution agent, and by colourless or yellowishly be the flavescence look, promptly dioxide peroxide is activated system, as working fluid at once;
In the 5th step, taking by weighing mass fraction is the C agent of 10-30 part, joins in the 4th step working fluid that be activated of dioxide peroxide, and this working fluid is as unblocking agent;
The 6th step, with the unblocking agent in the 5th step through the disposable whole injections of sleeve pipe stratum;
The 7th step, through sleeve pipe subsequent fluid water 5-10T is injected the down-hole, working fluid unblocking agent after the activation is squeezed into perforation interval;
The 8th step, closing well 6-24 hour.
Because oil field of the present invention unblocking agent is employed in aboveground ground and carries out chlorine dioxide activation; Property injection down-hole construction de-plugging again behind the chlorine dioxide activation; Technology is simple; Change prior art and adopted a plurality of circulations successively various medicament segmentations alternately to be injected the oil field de-plugging construction technology of down-hole, reduced construction cost, and safe and reliable; Owing to directly accomplish chlorine dioxide activation and synchronous on ground with dissolving; Effective concentration behind the assurance chlorine dioxide activation; Changed that alternately to inject chlorine dioxide activation insufficient; The shortcoming of acid activation seriously corroded has been eliminated if activation is prone to produce the dangerous hidden danger of dioxide peroxide blast on ground, and to problems such as human respiratory damage.
The practical implementation method
With specific embodiment the present invention is done further detailed explanation below.
Embodiment one
A kind of composite blockage relieving agent is made up of A agent, B agent and C agent, and the A agent is a ClO 2 solution; The B agent is non-sour solid activating agent system; The C agent is anti-dioxide peroxide oxidation corrosion organic phosphorus corrosion inhibitor, and the mass ratio of its A agent, B agent and C agent is 100: 4: 30
The A agent is that mass fraction is 2% stable ClO 2 solution.
The B agent is made up of organic isocyanurate, mineral sulfates and oxymuriate, and the organic isocyanurate in the B agent is a dichloroisocyanuric acid sodium, and its quality accounts for B agent 40%; Mineral sulfates in the B agent is a sal epsom, and its quality accounts for B agent 25%, and oxymuriate is a calcium chloride, and its quality accounts for 35%.
The C agent is that mass fraction is 25% hexanediamine tetramethyl fork phosphonic acids.
Its concrete method of use is:
The first step is injected the down-hole through sleeve pipe with spearhead water 7T;
Second step, select unblocking agent A agent consumption, every 1m oil reservoir is with A agent 200kg, and the consumption of corresponding B agent and C agent, and it is 1.0T that this test oil well is selected A agent consumption, and B agent consumption is 40kg, and C agent consumption is 300kg;
The 3rd step added the A agent 1.0T that chooses in the storage tank, used 9.0T water to be diluted to chlorine dioxide concentration and was 2000mg/L;
The 4th step took by weighing the B agent 40kg that chooses, slowly add with in the water-reducible storage tank that contains the A agent aqueous solution of 9.0T, system at once by colourless or yellowish be the flavescence look, promptly dioxide peroxide is activated, as working fluid;
The 5th step took by weighing the C agent 300kg that chooses, and added in the 4th step working fluid that be activated of dioxide peroxide, as unblocking agent;
The 6th step, with the unblocking agent in the 5th step through the disposable whole injection oil-well stratas of sleeve pipe;
The 7th step, through sleeve pipe subsequent fluid water 5T is injected the down-hole, the working fluid unblocking agent is squeezed into perforation interval;
The 8th step, closing well 20 hours.
Embodiment two
A kind of composite blockage relieving agent is made up of A agent, B agent and C agent, and the A agent is a ClO 2 solution; The B agent is non-sour solid activating agent system; The C agent is the antioxygen inhibiter, and the mass ratio of its A agent, B agent and C agent is 100: 5: 30.
The A agent is that mass fraction is 3% stable ClO 2 solution.
The B agent is made up of organic isocyanurate, mineral sulfates and oxymuriate, and the organic isocyanurate in the B agent is a TCCA, and its quality accounts for B agent 45%; Mineral sulfates in the B agent is a sodium sulfate, and its quality accounts for B agent 30%.Oxymuriate is a calcium chloride, and its quality accounts for 25%.
The C agent is that mass fraction is 35% 2-phosphonic acids butane-1,2, the 4-tricarboxylic acid.
Its concrete method of use is:
The first step is injected the down-hole through sleeve pipe with spearhead water 6T;
Second step, select unblocking agent A agent consumption, every 1m oil reservoir is selected corresponding B agent consumption and C agent consumption with A agent 200kg, and it is 1.5T that this test oil well is chosen A agent consumption, and B agent consumption is 75kg, and C agent consumption is 450kg then;
The 3rd step added the A agent 1.5T that chooses in the storage tank, used 13.5T water to be diluted to chlorine dioxide concentration and was 3000mg/L;
The 4th step took by weighing corresponding B agent 75kg, and the adding that blows slowly contains in the A agent solution storage tank behind the dilute with water, and by the colourless or faint yellow yellow that becomes, promptly dioxide peroxide is activated system at once, as working fluid;
The 5th step took by weighing corresponding C agent 450kg, added in the 4th step working fluid that be activated of dioxide peroxide, as unblocking agent;
The 6th step, with the unblocking agent in the 5th step through the disposable whole injections of sleeve pipe stratum;
The 7th step, through sleeve pipe subsequent fluid water 6T is injected the down-hole, working fluid unblocking agent after the activation is squeezed into perforation interval;
The 8th step, closing well 8 hours.
Embodiment three
A kind of composite blockage relieving agent is made up of A agent, B agent and C agent, and the A agent is a ClO 2 solution; The B agent is non-sour solid activating agent system; The C agent is the antioxygen inhibiter, and the mass ratio of its A agent, B agent and C agent is 100: 6: 20.
The A agent is that mass fraction is 2.5% stable ClO 2 solution.
The B agent is made up of organic isocyanurate, mineral sulfates and oxymuriate, and the organic isocyanurate in the B agent is a dichloroisocyanuric acid sodium, and its quality accounts for B agent 43%; Mineral sulfates in the B agent is sodium pyrosulfate and sal epsom, and its quality accounts for B agent 25% and 5% respectively.Oxymuriate is a calcium chloride, and its quality accounts for 27%.
The C agent is that mass fraction is 35% hexanediamine tetramethyl fork phosphonic acids.
Its concrete method of use is:
The first step is injected the down-hole through sleeve pipe with spearhead water 5T;
Second step, select unblocking agent A agent consumption according to oil well stopping state and core intersection, every 1m oil reservoir is selected corresponding B agent consumption and C agent consumption with A agent 200kg.This test oil well is selected A agent 1.2T, B agent 72kg, C agent 240kg;
The 3rd step added the A agent 1.2T that chooses in the storage tank, was diluted to ClO with 10.8T water
2Concentration is 2500mg/L;
The 4th step took by weighing the B agent 72kg that chooses, and the adding that blows slowly contains in the A agent solution storage tank behind the dilute with water, and by the colourless or faint yellow yellow that becomes, promptly dioxide peroxide is activated system, as working fluid at once;
The 5th step took by weighing the C agent 240kg that chooses, and added in the 4th step working fluid that be activated of dioxide peroxide, as unblocking agent;
The 6th step, with the unblocking agent in the 5th step through the disposable whole injections of sleeve pipe stratum;
The 7th step, through sleeve pipe subsequent fluid water 8T is injected the down-hole, working fluid unblocking agent after the activation is squeezed into perforation interval;
The 8th step, closing well 15 hours.
The concrete plugging removal effect of said embodiment is following:
Oil recovery factory's de-plugging result
In sum, this unblocking agent has the characteristic that fast activating generates high concentration of chlorine dioxide, and does not have a large amount of chlorine dioxides and overflow.This method for removing blockage have disposable whole injection activatory dioxide peroxide be main composite blockage relieving agent to the oil well bottom, simple to operate, de-plugging is characteristic safely and efficiently.Can be widely used in oil, well de-plugging, injection well de-plugging, pressure break de-plugging, oil well production increasing, water injection well stimulation, oil field pipe clean; Industrial circulating water sterilization algae removals etc., purposes is wide.
Claims (8)
1. composite blockage relieving agent, it is characterized in that: be made up of A agent, B agent and C agent, the A agent is a ClO 2 solution; The B agent is non-sour solid activating agent system; The C agent is the antioxygen inhibiter, and the mass ratio of its A agent, B agent and C agent is 100: (4～6): (10～30);
Described A agent is that mass fraction is the stable ClO 2 solution of 2-10%;
Described B agent is made up of organic isocyanurate, mineral sulfates and oxymuriate, and the organic isocyanurate in the B agent is dichloroisocyanuric acid sodium or TCCA, and its quality accounts for B agent 30-50%; Mineral sulfates in the B agent is sal epsom, sodium pyrosulfate, sodium sulfate one or more combination, accounts for B agent 15-50%; Oxymuriate is a calcium chloride, and its quality accounts for B agent 20-40%.
Described C agent is that mass fraction is hexanediamine tetramethyl fork phosphonic acids, HEDP sodium, HEDP, 2-phosphonic acids butane-1,2,4-tricarboxylic acid or the divalent alcohol SULPHOSUCCINIC ACID ESTER of 5-35%.
2. according to the method for use of the said a kind of composite blockage relieving agent of claim 1, it is characterized in that: may further comprise the steps:
The first step is injected the down-hole through sleeve pipe with spearhead water 5-10T;
Second step, the consumption of selection unblocking agent A agent, every 1m oil reservoir is with A agent 200kg, and the consumption of corresponding B agent and C agent;
In the 3rd step, be that 100 parts A agent adds in the storage tank with the mass fraction that chooses, and be diluted with water to 2000mg/L～3000mg/L;
In the 4th step, taking by weighing mass fraction is the B agent of 4-6 part, adds in the storage tank contain the aqueous solution behind the A dilution agent, and by colourless or yellowishly be the flavescence look, promptly dioxide peroxide is activated system, as working fluid at once;
In the 5th step, taking by weighing mass fraction is the C agent of 10-30 part, joins in the 4th step working fluid that be activated of dioxide peroxide, and this working fluid is as unblocking agent;
The 6th step, with the unblocking agent in the 5th step through the disposable whole injections of sleeve pipe stratum;
The 7th step, through sleeve pipe subsequent fluid water 5-10T is injected the down-hole, working fluid unblocking agent after the activation is squeezed into perforation interval;
The 8th step, closing well 6-24 hour.
3. according to the said a kind of composite blockage relieving agent of claim 1, it is characterized in that: be made up of A agent, B agent and C agent, the A agent is a ClO 2 solution; The B agent is non-sour solid activating agent system; The C agent is the antioxygen inhibiter, and the mass ratio of its A agent, B agent and C agent is 100: 4: 30;
The A agent is that mass fraction is 2% ClO 2 solution;
The B agent is made up of organic isocyanurate, mineral sulfates and oxymuriate, and the organic isocyanurate in the B agent is a dichloroisocyanuric acid sodium, and its quality accounts for B agent 40%; Mineral sulfates in the B agent is a sal epsom, and its quality accounts for B agent 25%, and oxymuriate is a calcium chloride, and its quality accounts for 35%.
The C agent is that mass fraction is 25% hexanediamine tetramethyl fork phosphonic acids.
4. according to the method for use of the said a kind of composite blockage relieving agent of claim 3, it is characterized in that: may further comprise the steps:
The first step is injected the down-hole through sleeve pipe with spearhead water 7T;
Second step, select unblocking agent A agent consumption, every 1m oil reservoir is with A agent 200kg, and the consumption of corresponding B agent and C agent, and it is 1.0T that this test oil well is selected A agent consumption, and B agent consumption is 40kg, and C agent consumption is 300kg;
The 3rd step added the A agent 1.0T that chooses in the storage tank, used 9.0T water to be diluted to chlorine dioxide concentration and was 2000mg/L;
The 4th step took by weighing the B agent 40kg that chooses, slowly add with in the water-reducible storage tank that contains the A agent aqueous solution of 9.0T, system at once by colourless or yellowish be the flavescence look, promptly dioxide peroxide is activated, as working fluid;
The 5th step took by weighing the C agent 300kg that chooses, and added in the 4th step working fluid that be activated of dioxide peroxide, as unblocking agent;
The 6th step, with the unblocking agent in the 5th step through the disposable whole injection oil-well stratas of sleeve pipe;
The 7th step, through sleeve pipe subsequent fluid water 5T is injected the down-hole, working fluid unblocking agent after the activation is squeezed into perforation interval;
The 8th step, closing well 20 hours.
5. according to the said a kind of composite blockage relieving agent of claim 1, it is characterized in that: be made up of A agent, B agent and C agent, the A agent is a ClO 2 solution; The B agent is non-sour solid activating agent system; The C agent is the antioxygen inhibiter, and the mass ratio of its A agent, B agent and C agent is 100: 5: 30;
The A agent is that mass fraction is 3% ClO 2 solution;
The B agent is made up of organic isocyanurate, mineral sulfates and oxymuriate, and the organic isocyanurate in the B agent is a TCCA, and its quality accounts for B agent 45%; Mineral sulfates in the B agent is a sodium sulfate, and its quality accounts for B agent 30%.Oxymuriate is a calcium chloride, and its quality accounts for 25%.
The C agent is that mass fraction is 35% 2-phosphonic acids butane-1,2, the 4-tricarboxylic acid.
6. according to the method for use of the said a kind of composite blockage relieving agent of claim 5, it is characterized in that: may further comprise the steps:
The first step is injected the down-hole through sleeve pipe with spearhead water 6T;
Second step, select unblocking agent A agent consumption, every 1m oil reservoir is selected corresponding B agent consumption and C agent consumption with A agent 200kg, and it is 1.5T that this test oil well is chosen A agent consumption, and B agent consumption is 75kg, and C agent consumption is 450kg then;
The 3rd step added the A agent 1.5T that chooses in the storage tank, used 13.5T water to be diluted to chlorine dioxide concentration and was 3000mg/L;
The 4th step took by weighing corresponding B agent 75kg, and the adding that blows slowly contains in the A agent solution storage tank behind the dilute with water, and by the colourless or faint yellow yellow that becomes, promptly dioxide peroxide is activated system at once, as working fluid;
The 5th step took by weighing corresponding C agent 450kg, added in the 4th step working fluid that be activated of dioxide peroxide, as unblocking agent;
The 6th step, with the unblocking agent in the 5th step through the disposable whole injections of sleeve pipe stratum;
The 7th step, through sleeve pipe subsequent fluid water 6T is injected the down-hole, working fluid unblocking agent after the activation is squeezed into perforation interval;
The 8th step, closing well 8 hours.
7. according to the said a kind of composite blockage relieving agent of claim 1, it is characterized in that: be made up of A agent, B agent and C agent, the A agent is a ClO 2 solution; The B agent is non-sour solid activating agent system; The C agent is the antioxygen inhibiter, and the mass ratio of its A agent, B agent and C agent is 100: 6: 20;
The A agent is that mass fraction is 2.5% ClO 2 solution;
The B agent is made up of organic isocyanurate, mineral sulfates and oxymuriate, and the organic isocyanurate in the B agent is a dichloroisocyanuric acid sodium, and its quality accounts for B agent 43%; Mineral sulfates in the B agent is sodium pyrosulfate and sal epsom, and its quality accounts for B agent 25% and 5% respectively; Oxymuriate is a calcium chloride, and its quality accounts for 27%;
The C agent is that mass fraction is 35% hexanediamine tetramethyl fork phosphonic acids.
8. according to the method for use of the said a kind of composite blockage relieving agent of claim 7, it is characterized in that: may further comprise the steps:
The first step is injected the down-hole through sleeve pipe with spearhead water 5T;
Second step, select unblocking agent A agent consumption according to oil well stopping state and core intersection, every 1m oil reservoir is selected corresponding B agent consumption and C agent consumption with A agent 200kg.This test oil well is selected A agent 1.2T, B agent 72kg, C agent 240kg;
The 3rd step added the A agent 1.2T that chooses in the storage tank, was diluted to ClO with 11T water
2Concentration is 2500mg/L;
The 4th step took by weighing the B agent 72kg that chooses, and the adding that blows slowly contains in the A agent solution storage tank behind the dilute with water, and by the colourless or faint yellow yellow that becomes, promptly dioxide peroxide is activated system, as working fluid at once;
The 5th step took by weighing the C agent 240kg that chooses, and added in the 4th step working fluid that be activated of dioxide peroxide, as unblocking agent;
The 6th step, with the unblocking agent in the 5th step through the disposable whole injections of sleeve pipe stratum;
The 7th step, through sleeve pipe subsequent fluid water 8T is injected the down-hole, working fluid unblocking agent after the activation is squeezed into perforation interval;
The 8th step, closing well 15 hours.
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| CN111607371B (en) * | 2020-04-30 | 2022-08-02 | 中海石油（中国）有限公司天津分公司 | Efficient blockage removing system for polymer flooding injection well, preparation method and application of efficient blockage removing system |
| CN113292974B (en) * | 2021-06-21 | 2023-03-17 | 长江大学 | Chlorine dioxide polymer oxidation blocking remover |
| CN117384611B (en) * | 2023-12-13 | 2024-02-13 | 东营煜煌能源技术有限公司 | Solid descaling blocking remover and preparation method thereof |
| CN117447977B (en) * | 2023-12-18 | 2024-02-23 | 东营市百扬石油科技有限责任公司 | Preparation method and application of blocking remover containing biological enzyme |
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| US4964466A (en) * | 1989-08-07 | 1990-10-23 | Exxon Chemicals Patents Inc | Hydraulic fracturing with chlorine dioxide cleanup |
| CN1831295A (en) * | 2006-04-05 | 2006-09-13 | 东营盛世石油科技有限责任公司 | Technology method for deblock of oil field oil-water well using biological acid |
| US7131495B2 (en) * | 2002-11-08 | 2006-11-07 | Zhanyuan Hao | Method for preparing a chlorine dioxide block-removing agent in oil wells |
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|---|---|---|---|---|
| US4964466A (en) * | 1989-08-07 | 1990-10-23 | Exxon Chemicals Patents Inc | Hydraulic fracturing with chlorine dioxide cleanup |
| US7131495B2 (en) * | 2002-11-08 | 2006-11-07 | Zhanyuan Hao | Method for preparing a chlorine dioxide block-removing agent in oil wells |
| CN1831295A (en) * | 2006-04-05 | 2006-09-13 | 东营盛世石油科技有限责任公司 | Technology method for deblock of oil field oil-water well using biological acid |
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