CN103410474B - A kind of water injection well in oil fields annular space tubing and casing process for corrosion control - Google Patents
A kind of water injection well in oil fields annular space tubing and casing process for corrosion control Download PDFInfo
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- CN103410474B CN103410474B CN201310341945.5A CN201310341945A CN103410474B CN 103410474 B CN103410474 B CN 103410474B CN 201310341945 A CN201310341945 A CN 201310341945A CN 103410474 B CN103410474 B CN 103410474B
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Abstract
A kind of water injection well in oil fields annular space tubing and casing process for corrosion control, its construction technology first cleans up the dirty thing on annular space oil jacket tube wall with A agent or B agent prescription, then certain density corrosion control inorganic agent is injected at annular space, repeat again after a period of time carry out cleaning to annular space and change corrosion control inorganic agent, reach the object that digital preservation tubing and casing tube wall avoids corrosion; The present invention significantly slows down the corrosion of annular space medium to tubing and casing, can extend the application life more than 1 times of water injection well tubing and casing, and cost is low, and construction technology is simple and convenient.For oil field high yield and stable yields provide effective technical support.
Description
Technical field
The present invention relates to oil field tubing and casing corrosion control technology, particularly for water injection well in oil fields in the process of water filling, the corrosion of annular space oil pipe and sleeve pipe and a kind of water injection well in oil fields annular space tubing and casing process for corrosion control developed.
Background technology
Oil field enters mid-later development phase; on the one hand due to continuous exploitation; oil well formation pressure significantly declines; oil reservoir elasticity exploitation energy declines; moisture rising in produced liquid in oil well on the other hand, in order to protection of the environment and maintenance oil reservoir energy, needs to be separated sewage to production fluid and carries out process up to standard; and the sewage of process is injected into oil reservoir by water injection well, reach and maintain the pressure of oil reservoir and the object of water drive crude oil.Water injection well is in the process of water filling, because water injection well annular space is a slough, the growth of its environment particularly suitable bacterium, bacterium constantly breeds and hyperplasia at annular space, in annular space medium, hydrogen sulfide content can increase considerably, tube wall produces the fouling of iron sulfide deposition, in addition annular space medium salinity is high, pH value is low, multifactorial synergy causes the medium of annular space, and not only homogeneous corrosion is serious, and the lower spot corrosion also especially severe of dirt, cause injection well tubing, there is corrosion failure in sleeve pipe, sewage can not be injected into the water filling layer of design, water filling was lost efficacy, particularly sleeve pipe is thinning owing to corroding, corrosion produces groove, casing strength declines, the effect of geostatic stress can not be born and be out of shape or bad break, water injection well cannot carry out water filling and scrap, again water filling needs beat new well or carry out casing repairing, costly and impact produce, and current casing repair technology is perfect not, costly but success rate is low.Oil field enters the middle and later periods, and waterflooding extraction is oilfield stable production and increase economic efficiency the most effective means, and the heavy corrosion of water injection well annular space tubing and casing becomes main restraining factors.
Summary of the invention
In order to overcome the defect of above-mentioned prior art, slow down water injection well annular space medium to the corrosion of water injection well tubing and casing, it is avoided to cause adverse effect to production, guarantee the performance of waterflooding development effect and benefit, the object of the present invention is to provide a kind of water injection well in oil fields annular space tubing and casing process for corrosion control, effectively can remove the foulant that water injection well tubing and casing tube wall adheres to, can longer cycle on water injection well tubing and casing tube wall, form diaphragm, play the contact of isolation annular space medium and tubing and casing tube wall, significantly slow down the corrosion of annular space medium to tubing and casing, the application life more than 1 times of water injection well tubing and casing can be extended, and cost is low, construction technology is simple and convenient.
For achieving the above object, technical scheme of the present invention is:
A kind of water injection well in oil fields annular space tubing and casing process for corrosion control, is characterized in that, when water injection well has recycle-water pipeline, comprise the following steps:
At the well head of water injection well, the sample cock that high-pressure plunger measuring pump and water injection well inject water pipeline is connected, the original annotation Water flow-path of wellhead of water injection well is adjusted to anti-flushing well flow process, open the recycle-water single well pipeline valve of distributing room for water injection, regulate well-flushing discharge capacity to be 25m
3/ h, well-flushing, after 1.5 hours, reduces well-flushing discharge capacity to 10m
3/ h, start high-pressure plunger measuring pump and mate with well-flushing water discharge capacity, and add a kind of A agent prescription of annular space tubing and casing tube wall incrustation thing cleaning agent, adding mass concentration is 25%, and the joining day is T
1(h)=0.785 × 10
-7× L × (D
2 cover-D
2 oil)+0.1, D
coverfor water injection well casing diameter mm, D
oilfor injection well tubing diameter mm, L are injection well tubing depth of setting m, then reduction plunger displacement pump discharge capacity makes A agent add mass concentration is 5%, and the joining day is 4 hours, the dosing of stop plunger pump, improves well-flushing water discharge capacity to 25m
3/ h, duration of well flushing is T
2(h)=0.314 × 10
-7× L × D
2 cover+ 0.5, regulate well-flushing water discharge capacity to be 15m
3/ h, starts high-pressure plunger measuring pump and mates with well-flushing water discharge capacity, and add corrosion control inorganic agent, and add concentration and divide 3 identical stages, it is 1% that the first stage adds mass concentration, and the joining day is T
3(h)=0.175 × 10
-7× L(D
2 cover-D
2 oil), it is 2% that second stage adds mass concentration, and the joining day is T
3h (), it is 6% that the phase III adds mass concentration, and the joining day is T
3(h), adding rear adjustment water injection well valve is water filling flow process, carries out normal water filling; Water filling, after 3 months, re-starts construction, at the well head of water injection well, the sample cock that high-pressure plunger measuring pump and water injection well inject water pipeline is connected, the original annotation Water flow-path of wellhead of water injection well is adjusted to anti-flushing well flow process, opens the recycle-water single well pipeline valve of distributing room for water injection, regulate well-flushing discharge capacity to be 25m
3/ h, after well-flushing 60min, reduces well-flushing discharge capacity to 10m
3/ h, start high-pressure plunger measuring pump and mate with well-flushing water discharge capacity, and add A agent prescription, adding mass concentration is 5%, and the joining day is after 3 hours, the dosing of stop plunger pump, improves well-flushing water discharge capacity to 25m
3/ h, well-flushing, after 2 hours, reduces well-flushing water discharge capacity to 15m
3/ h, starts high-pressure plunger measuring pump and mates with well-flushing water discharge capacity, and add corrosion control treatment agent formula, and add concentration and divide 3 identical stages, it is 1% that the first stage adds concentration, and the joining day is T
3h (), it is 2% that second stage adds mass concentration, and the joining day is T
3h (), it is 6% that the phase III adds mass concentration, and the joining day is T
3h (), by water injection well valve adjustment reinjected water flow process after adding, carries out normal water filling; Water filling is after 3 months again, then repeats aforesaid operations, and the rest may be inferred.
A kind of water injection well in oil fields annular space tubing and casing process for corrosion control, it is characterized in that, when water injection well does not have recycle-water pipeline, comprise the following steps: at the well head of water injection well, the sample cock that high-pressure plunger measuring pump and water injection well inject water pipeline is connected, the original annotation Water flow-path of wellhead of water injection well is adjusted to anti-flushing well flow process, injection water discharge capacity is regulated to be 75% of injection flow, from casing annulus, water is injected water filling layer, meanwhile start plunger displacement pump, mate with injection water discharge capacity, add a kind of B agent prescription of annular space tubing and casing tube wall incrustation thing cleaning agent, adding mass concentration is 15%, joining day is T
1(h)=0.785 × 10
-6× L(D
2 cover-D
2 oil) ,/Q+0.5, D
coverfor water injection well casing diameter mm, D
oilfor injection well tubing diameter mm, L are that injection well tubing depth of setting m, Q are for injecting water discharge capacity m
3/ h, added the constant continuation water filling of rear injection water discharge capacity after 4 hours, started high-pressure plunger measuring pump and injected water discharge capacity and mate and add corrosion control treatment agent formula, and add concentration and divide 3 identical stages, it is 1% that the first stage adds mass concentration, joining day T
2(h)=0.262 × 10
-6× L(D
2 cover-D
2 oil)/Q, it is 2% that second stage adds mass concentration, and the joining day is T
2h (), it is 6% that the phase III adds mass concentration, and the joining day is T
2(h), by water injection well valve adjustment reinjected water flow process after adding, carry out normal water filling, water filling is after 3 months, re-start construction, at the well head of water injection well, the sample cock that high-pressure plunger measuring pump and water injection well inject water pipeline is connected, the original annotation Water flow-path of wellhead of water injection well is adjusted to anti-flushing well flow process, injection water discharge capacity is regulated to be 75% of water filling discharge capacity, from casing annulus, water is injected water filling layer, meanwhile start plunger displacement pump, mate with injection water discharge capacity and add B agent prescription, adding mass concentration is 5%, joining day is 6 hours, add the constant continuation water filling of rear injection water discharge capacity 4 hours, startup high-pressure plunger measuring pump mates with injection water discharge capacity and adds corrosion control treatment agent formula, add concentration and divide 3 identical stages, it is 1% that first stage adds mass concentration, joining day T
2h (), it is 2% that second stage adds mass concentration, and the joining day is T
2h (), it is 6% that the phase III adds mass concentration, and the joining day is T
2h (), by water injection well valve adjustment reinjected water flow process after adding, carry out normal water filling, water filling is after 3 months again, then repeats aforesaid operations, and the rest may be inferred.
For the first time dosing of water injection well oil casing annular space, foulant on water injection well annular space oil jacket tube wall is cleaned up, corrosion control inorganic agent be incorporated as 3 months one-periods, each cycle needs to clean tubing and casing tube wall, guarantees that the corrosion control inorganic agent added can play its effect to greatest extent.
The A agent prescription of described a kind of annular space tubing and casing tube wall incrustation thing cleaning agent, its mass percent consists of: 0 ~ 20%HCL, 0 ~ 15% glycolic acid, 0 ~ 5% potassium permanganate, 0.1 ~ 1% quinoline dichloroetane quaternary ammonium salt, 0.1 ~ 2% methenamine, 0.01 ~ 0.5% propilolic alcohol, 0.001 ~ 0.05% KI, 0.1 ~ 2% octadecylamine APEO (1825), the ethylene oxide condensate EL-20 of 0.1 ~ 2% castor oil, surplus are clear water;
The B agent prescription of described a kind of annular space tubing and casing tube wall incrustation thing cleaning agent, its mass percent consists of: 0 ~ 10%HCL, 0 ~ 5% phytic acid, 0 ~ 15% hydroxy ethylene diphosphonic acid, 0 ~ 10%1, 6-hexapotassium, 0.1 ~ 2% ammonium thiocyanate, 0.1 ~ 1% pyridine benzyl dichloride quaternary ammonium salt, 0.5 ~ 2% methenamine, 0.01 ~ 0.5% propilolic alcohol, 0.001 ~ 0.05% KI, 0.1 ~ 2% octadecylamine APEO (1825), 0.01 ~ 1% bisoctyl dimethyl ammonium bromide, the ethylene oxide condensate EL-20 of 0.1 ~ 2% castor oil, 0 ~ 2% demulsifier, 0 ~ 10% glycerine, 0 ~ 10% ethylene glycol monobutyl ether, surplus is clear water,
Described corrosion control treatment agent formula, the mass percent of its formula consists of: 5 ~ 30% imidazoline APEOs, 3 ~ 15% quinoline benzyl chloride quaternary ammonium salts, 1 ~ 10% octadecyl trimethyl ammonium chloride, 1 ~ 20% dodecyl dimethyl benzyl ammonium bromide, 1 ~ 30% didecyl Dimethy ammonium chloride, 1 ~ 5% methenamine, 0.5 ~ 5% butynediols, 0.5 ~ 5% tetramethyl KI, surplus are clear water.
Principle of the present invention is: first A agent or B agent are injected water injection well oil casing annular space by high-pressure plunger measuring pump and well-flushing water by finite concentration ratio match, foulant on tubing and casing tube wall is cleaned up, be conducive to corrosion control inorganic agent film forming on the tube wall of tubing and casing on the one hand, play a protective role, remove the foulant on tube wall on the other hand, minimizing or the spot corrosion that under having stopped bacterium dirt, breeding and hyperplasia are brought, consider the corrosion losses alleviating tubing and casing to greatest extent simultaneously, A agent prescription and B agent prescription add concentration lower than 30% time, corrosion rate is all less than 0.076mm/a.
For the water injection well having well-flushing recycle-water pipeline, well-flushing water enters Sewage Disposal wastewater disposal basin by recycle-water pipeline, the well-flushing water of washing well process does not need to enter water injection well water filling layer, the secondary precipitation instability problem considering well-flushing water raffinate is not needed after well-flushing work progress with end, do not need to consider whether have pollution and blockage problem to water filling layer, therefore, adopt A agent prescription to carry out the cleaning of tubing and casing tube wall incrustation thing;
For the water injection well not having well-flushing recycle-water pipeline, well-flushing water cannot enter Sewage Disposal wastewater disposal basin by recycle-water pipeline, the well-flushing water of washing well process can only enter water injection well water filling layer, need to consider well-flushing water raffinate instability and secondary precipitation problem after well-flushing work progress with end, occur after preventing it from entering water filling layer that precipitation causes secondary pollution to block water filling layer, therefore, B agent prescription is adopted to carry out the cleaning of tubing and casing tube wall incrustation thing, after B agent prescription cleaning fluid has cleaning, raffinate is without particle, stable under water filling layer condition, there is not the performance of secondary precipitation, cost is higher than A agent prescription cleaning fluid,
After well-flushing terminates, press finite concentration ratio match by high-pressure plunger measuring pump and well-flushing water and corrosion control inorganic agent is injected water injection well oil casing annular space, well-flushing is stopped after the well-flushing water being added with corrosion control inorganic agent is full of water injection well oil casing annular space, close water injection well sleeve pipe terminal valve, proceed to normal water filling flow process.Due to corrosion control inorganic agent can effectively kill on annular space tubing and casing tube wall with the bacterium in medium, control on annular space tube wall and do not breed and hyperplasia with the bacterium in medium, bacterial corrosion is controlled, in addition, corrosion control inorganic agent can adsorb the stable hydrophobic film of formation one deck on tubing and casing tube wall, medium and tubing and casing are isolated, serve the corrosion preventing tubing and casing from annular space medium, corrosion control inorganic agent stable in properties, in annular space medium, stationary phase is greater than more than 180 days, therefore, corrosion control inorganic agent effectively can control breeding and the corrosion of bacterium in annular space medium completely within 3 months cycles of dosing.
Water injection well annular space corrosion control inorganic agent CONCENTRATION DISTRIBUTION from top to bottom is also studied, the diffusion velocity of corrosion control inorganic agent is have rated by a large amount of laboratory experiments, tested by the diffusivity of field trial to corrosion control inorganic agent, the concentration demonstrating water injection well annular space top 1/3 space corrosion control inorganic agent is 6%, the concentration of middle part 1/3 space corrosion control inorganic agent is 2%, the concentration of bottom 1/3 space corrosion control inorganic agent is 1%, within the cycle of 3 months, can ensure that the corrosion control inorganic agent concentration in annular space medium is in the concentration range of effectively control bacterial reproduction and corrosion.
The present invention, according to water injection well production technology characteristic, provides a kind of annular space tubing and casing tube wall incrustation cleaning agent A agent, B agent and corrosion control inorganic agent and construction technology; 2 kinds of cleaning agent formula A agent and B agent for the process design that water injection well is different, while effectively can removing the foulant on tubing and casing tube wall, can not cause the secondary pollution of water filling layer; Reason for the corrosion of water injection well annular space devises the corrosion control inorganic agent with sterilization and corrosion inhibitive function; filming performance is good; stability is good; the breeding of bacterium and the corrosion of medium effectively can be controlled in the cycle of annular space more than 3 months; the bacterial content of annular space medium is less than 25/mL; sterilizing rate is greater than 99%, and corrosion rate is less than 0.076mm/a, can play the object of protection tubing and casing from corrosion.
Accompanying drawing explanation
Fig. 1 is the control technology construction process figure preventing water injection well annular space tubing and casing from corroding of the present invention.
Detailed description of the invention:
The present invention is further illustrated below by specific embodiment.
Embodiment one
The present embodiment is the water injection well (well depth 2200m) having recycle-water pipeline.
The construction technology of the present embodiment, step is: as Fig. 1 connects flow process, and the original annotation Water flow-path of wellhead of water injection well is adjusted to anti-flushing well flow process, opens the recycle-water single well pipeline valve of distributing room for water injection, regulates well-flushing discharge capacity to be 25m
3/ h, well-flushing, after 1.5 hours, reduces well-flushing discharge capacity to 10m
3/ h, starts high-pressure plunger measuring pump and mates with well-flushing water discharge capacity, and add A agent prescription, adding mass concentration is 25%, and the joining day is 2.1 hours, and then reduction plunger displacement pump discharge capacity makes A agent add mass concentration is 5%, joining day is 4 hours, the dosing of stop plunger pump, improves well-flushing water discharge capacity to 25m
3/ h, well-flushing, after 1.56 hours, regulates well-flushing water discharge capacity to be 15m
3/ h, startup high-pressure plunger measuring pump mates with well-flushing water discharge capacity and adds corrosion control treatment agent formula, it is 1% that first stage adds mass concentration, it is 2% that second stage adds mass concentration, it is 6% that phase III adds mass concentration, the time that every one-phase adds is 0.44 hour, and adding rear adjustment water injection well valve is water filling flow process, carries out normal water filling.Water filling, after 3 months, re-starts construction, at the well head of water injection well, the sample cock that high-pressure plunger measuring pump and water injection well inject water pipeline is connected, the original annotation Water flow-path of wellhead of water injection well is adjusted to anti-flushing well flow process, opens the recycle-water single well pipeline valve of distributing room for water injection, regulate well-flushing discharge capacity to be 25m
3/ h, after well-flushing 60min, reduces well-flushing discharge capacity to 10m
3/ h, start high-pressure plunger measuring pump and mate with well-flushing water discharge capacity, and add A agent prescription, adding mass concentration is 5%, and the joining day is after 3 hours, the dosing of stop plunger pump, improves well-flushing water discharge capacity to 25m
3/ h, well-flushing, after 2 hours, reduces well-flushing water discharge capacity to 15m
3/ h, start high-pressure plunger measuring pump to mate with well-flushing water discharge capacity, and add corrosion control treatment agent formula, add concentration and divide 3 identical stages, it is 1% that the first stage adds concentration, and it is 2% that second stage adds mass concentration, it is 6% that phase III adds mass concentration, the time that every one-phase adds is 0.44 hour, by water injection well valve adjustment reinjected water flow process after adding, carries out normal water filling; Water filling is after 3 months again, then repeats aforesaid operations, and the rest may be inferred.
The A agent prescription of the annular space tubing and casing tube wall incrustation thing cleaning agent injected, its mass percent consists of: 15%HCL, 3% glycolic acid, 1% potassium permanganate, 0.6% quinoline dichloroetane quaternary ammonium salt, 1.2% methenamine, 0.3% propilolic alcohol, 0.02% KI, 0.5% octadecylamine APEO (1825), the ethylene oxide condensate EL-20 of 0.3% castor oil, surplus are clear water.
The corrosion control treatment agent formula injected, the mass percent of its formula consists of: 13% imidazoline APEO, 11% quinoline benzyl chloride quaternary ammonium salt, 5% octadecyl trimethyl ammonium chloride, 12% dodecyl dimethyl benzyl ammonium bromide, 6% didecyl Dimethy ammonium chloride, 3% methenamine, 2% butynediols, 0.1% tetramethyl KI, surplus are clear water.
Field conduct water injection well meter 6 mouthfuls, the bacterial content through tracking and testing water injection well annular space medium is all less than 10/mL, and corrosion rate is all less than 0.052mm/a.
Embodiment two
The present embodiment is the water injection well (well depth 1800m) having recycle-water pipeline.
The construction technology of the present embodiment, step is: as Fig. 1 connects flow process, and the original annotation Water flow-path of wellhead of water injection well is adjusted to anti-flushing well flow process, opens the recycle-water single well pipeline valve of distributing room for water injection, regulates well-flushing discharge capacity to be 25m
3/ h, well-flushing, after 1.5 hours, reduces well-flushing discharge capacity to 10m
3/ h, starts high-pressure plunger measuring pump and mates with well-flushing water discharge capacity, and add A agent prescription, adding mass concentration is 25%, and the joining day is 1.72 hours, and then reduction plunger displacement pump discharge capacity makes A agent add mass concentration is 5%, joining day is 4 hours, the dosing of stop plunger pump, improves well-flushing water discharge capacity to 25m
3/ h, well-flushing, after 1.36 hours, regulates well-flushing water discharge capacity to be 15m
3/ h, startup high-pressure plunger measuring pump mates with well-flushing water discharge capacity and adds corrosion control treatment agent formula, it is 1% that first stage adds mass concentration, it is 2% that second stage adds mass concentration, it is 6% that phase III adds mass concentration, the time that every one-phase adds is 0.36 hour, and adding rear adjustment water injection well valve is water filling flow process, carries out normal water filling.Water filling, after 3 months, re-starts construction, at the well head of water injection well, the sample cock that high-pressure plunger measuring pump and water injection well inject water pipeline is connected, the original annotation Water flow-path of wellhead of water injection well is adjusted to anti-flushing well flow process, opens the recycle-water single well pipeline valve of distributing room for water injection, regulate well-flushing discharge capacity to be 25m
3/ h, after well-flushing 60min, reduces well-flushing discharge capacity to 10m
3/ h, start high-pressure plunger measuring pump and mate with well-flushing water discharge capacity, and add A agent prescription, adding mass concentration is 5%, and the joining day is after 3 hours, the dosing of stop plunger pump, improves well-flushing water discharge capacity to 25m
3/ h, well-flushing, after 2 hours, reduces well-flushing water discharge capacity to 15m
3/ h, start high-pressure plunger measuring pump to mate with well-flushing water discharge capacity, and add corrosion control treatment agent formula, add concentration and divide 3 identical stages, it is 1% that the first stage adds concentration, and it is 2% that second stage adds mass concentration, it is 6% that phase III adds mass concentration, the time that every one-phase adds is 0.36 hour, by water injection well valve adjustment reinjected water flow process after adding, carries out normal water filling; Water filling is after 3 months again, then repeats aforesaid operations, and the rest may be inferred.
The A agent prescription of the annular space tubing and casing tube wall incrustation thing cleaning agent injected, its mass percent consists of: 12%HCL, 7% glycolic acid, 0.3% potassium permanganate, 0.8% quinoline dichloroetane quaternary ammonium salt, 1.5% methenamine, 0.5% propilolic alcohol, 0.015% KI, 0.6% octadecylamine APEO (1825), the ethylene oxide condensate EL-20 of 0.2% castor oil, surplus are clear water.
The corrosion control treatment agent formula injected, mass percent consists of: 15% imidazoline APEO, 9% quinoline benzyl chloride quaternary ammonium salt, 6% octadecyl trimethyl ammonium chloride, 7% dodecyl dimethyl benzyl ammonium bromide, 11% didecyl Dimethy ammonium chloride, 3% methenamine, 1.5% butynediols, 0.15% tetramethyl KI, surplus are clear water.
Field conduct water injection well meter 4 mouthfuls, the bacterial content through tracking and testing water injection well annular space medium is all less than 7.5/mL, and corrosion rate is all less than 0.047mm/a.
Embodiment three
The present embodiment is the water injection well (well depth 2480m) having recycle-water pipeline.
The construction technology of the present embodiment, step is: as Fig. 1 connects flow process, and the original annotation Water flow-path of wellhead of water injection well is adjusted to anti-flushing well flow process, opens the recycle-water single well pipeline valve of distributing room for water injection, regulates well-flushing discharge capacity to be 25m
3/ h, well-flushing, after 1.5 hours, reduces well-flushing discharge capacity to 10m
3/ h, starts high-pressure plunger measuring pump and mates with well-flushing water discharge capacity, and add A agent prescription, adding mass concentration is 25%, and the joining day is 2.4 hours, and then reduction plunger displacement pump discharge capacity makes A agent add mass concentration is 5%, joining day is 4 hours, the dosing of stop plunger pump, improves well-flushing water discharge capacity to 25m
3/ h, well-flushing, after 1.7 hours, regulates well-flushing water discharge capacity to be 15m
3/ h, startup high-pressure plunger measuring pump mates with well-flushing water discharge capacity and adds corrosion control treatment agent formula, it is 1% that first stage adds mass concentration, it is 2% that second stage adds mass concentration, it is 6% that phase III adds mass concentration, the time that every one-phase adds is 0.5 hour, and adding rear adjustment water injection well valve is water filling flow process, carries out normal water filling.Water filling, after 3 months, re-starts construction, at the well head of water injection well, the sample cock that high-pressure plunger measuring pump and water injection well inject water pipeline is connected, the original annotation Water flow-path of wellhead of water injection well is adjusted to anti-flushing well flow process, opens the recycle-water single well pipeline valve of distributing room for water injection, regulate well-flushing discharge capacity to be 25m
3/ h, after well-flushing 60min, reduces well-flushing discharge capacity to 10m
3/ h, start high-pressure plunger measuring pump and mate with well-flushing water discharge capacity, and add A agent prescription, adding mass concentration is 5%, and the joining day is after 3 hours, the dosing of stop plunger pump, improves well-flushing water discharge capacity to 25m
3/ h, well-flushing, after 2 hours, reduces well-flushing water discharge capacity to 15m
3/ h, start high-pressure plunger measuring pump to mate with well-flushing water discharge capacity, and add corrosion control treatment agent formula, add concentration and divide 3 identical stages, it is 1% that the first stage adds concentration, and it is 2% that second stage adds mass concentration, it is 6% that phase III adds mass concentration, the time that every one-phase adds is 0.44 hour, by water injection well valve adjustment reinjected water flow process after adding, carries out normal water filling; Water filling is after 3 months again, then repeats aforesaid operations, and the rest may be inferred.
The A agent prescription of the annular space tubing and casing tube wall incrustation thing cleaning agent injected, its mass percent consists of: 16%HCL, 5% glycolic acid, 0.2% potassium permanganate, 0.7% quinoline dichloroetane quaternary ammonium salt, 2% methenamine, 0.4% propilolic alcohol, 0.03% KI, 0.8% octadecylamine APEO (1825), the ethylene oxide condensate EL-20 of 0.3% castor oil, surplus are clear water.
The corrosion control treatment agent formula injected, the mass percent of its formula consists of: 12% imidazoline APEO, 14% quinoline benzyl chloride quaternary ammonium salt, 5% octadecyl trimethyl ammonium chloride, 6% dodecyl dimethyl benzyl ammonium bromide, 12% didecyl Dimethy ammonium chloride, 4% methenamine, 1.2% butynediols, 0.1% tetramethyl KI, surplus are clear water.
Field conduct water injection well meter 9 mouthfuls, the bacterial content through tracking and testing water injection well annular space medium is all less than 6.5/mL, and corrosion rate is all less than 0.063mm/a.
Embodiment four
The present embodiment is the water injection well (well depth 2000m) having recycle-water pipeline.
The construction technology of the present embodiment, step is: as Fig. 1 connects flow process, and the original annotation Water flow-path of wellhead of water injection well is adjusted to anti-flushing well flow process, opens the recycle-water single well pipeline valve of distributing room for water injection, regulates well-flushing discharge capacity to be 25m
3/ h, well-flushing, after 1.5 hours, reduces well-flushing discharge capacity to 10m
3/ h, starts high-pressure plunger measuring pump and mates with well-flushing water discharge capacity, and add A agent prescription, adding mass concentration is 25%, and the joining day is 1.9 hours, and then reduction plunger displacement pump discharge capacity makes A agent add mass concentration is 5%, joining day is 4 hours, the dosing of stop plunger pump, improves well-flushing water discharge capacity to 25m
3/ h, well-flushing, after 1.46 hours, regulates well-flushing water discharge capacity to be 15m
3/ h, startup high-pressure plunger measuring pump mates with well-flushing water discharge capacity and adds corrosion control treatment agent formula, it is 1% that first stage adds mass concentration, it is 2% that second stage adds mass concentration, it is 6% that phase III adds mass concentration, the time that every one-phase adds is 0.4 hour, and adding rear adjustment water injection well valve is water filling flow process, carries out normal water filling.Water filling, after 3 months, re-starts construction, at the well head of water injection well, the sample cock that high-pressure plunger measuring pump and water injection well inject water pipeline is connected, the original annotation Water flow-path of wellhead of water injection well is adjusted to anti-flushing well flow process, opens the recycle-water single well pipeline valve of distributing room for water injection, regulate well-flushing discharge capacity to be 25m
3/ h, after well-flushing 60min, reduces well-flushing discharge capacity to 10m
3/ h, start high-pressure plunger measuring pump and mate with well-flushing water discharge capacity, and add A agent prescription, adding mass concentration is 5%, and the joining day is after 3 hours, the dosing of stop plunger pump, improves well-flushing water discharge capacity to 25m
3/ h, well-flushing, after 2 hours, reduces well-flushing water discharge capacity to 15m
3/ h, start high-pressure plunger measuring pump to mate with well-flushing water discharge capacity, and add corrosion control treatment agent formula, add concentration and divide 3 identical stages, it is 1% that the first stage adds concentration, and it is 2% that second stage adds mass concentration, it is 6% that phase III adds mass concentration, the time that every one-phase adds is 0.4 hour, by water injection well valve adjustment reinjected water flow process after adding, carries out normal water filling; Water filling is after 3 months again, then repeats aforesaid operations, and the rest may be inferred.
The A agent prescription of the annular space tubing and casing tube wall incrustation thing cleaning agent injected, its mass percent consists of:: 6%HCL, 11% glycolic acid, 0.2% potassium permanganate, 0.8% quinoline dichloroetane quaternary ammonium salt, 3% methenamine, 0.4% propilolic alcohol, 0.035% KI, 0.6% octadecylamine APEO (1825), the ethylene oxide condensate EL-20 of 0.25% castor oil, surplus are clear water.
The corrosion control treatment agent formula injected, the mass percent of its formula consists of: 18% imidazoline APEO, 6% quinoline benzyl chloride quaternary ammonium salt, 4% octadecyl trimethyl ammonium chloride, 8% dodecyl dimethyl benzyl ammonium bromide, 5% didecyl Dimethy ammonium chloride, 3% methenamine, 1.5% butynediols, 0.15% tetramethyl KI, surplus are clear water.
Field conduct water injection well meter 11 mouthfuls, the bacterial content through tracking and testing water injection well annular space medium is all less than 4.5/mL, and corrosion rate is all less than 0.058mm/a.
Embodiment five
The present embodiment is the water injection well (well depth 1650m, the water injection rate 32m that do not have recycle-water pipeline
3/ d).
The construction technology of the present embodiment, step is: as Fig. 1 connects flow process, at the well head of water injection well, the sample cock that high-pressure plunger measuring pump and water injection well inject water pipeline is connected, the original annotation Water flow-path of wellhead of water injection well is adjusted to anti-flushing well flow process, injection water discharge capacity is regulated to be 75% of water injection rate, from casing annulus, water is injected water filling layer, meanwhile start plunger displacement pump, mate with injection water discharge capacity, add a kind of B agent prescription of annular space tubing and casing tube wall incrustation thing cleaning agent, adding mass concentration is 15%, joining day is 15.35 hours, D
coverfor water injection well casing diameter mm, D
oilfor injection well tubing diameter mm, L are that injection well tubing depth of setting m, Q are for injecting water discharge capacity m
3/ h, add the constant continuation water filling of rear injection water discharge capacity after 4 hours, startup high-pressure plunger measuring pump mates with injection water discharge capacity and adds corrosion control treatment agent formula, add concentration and divide 3 identical stages, it is 1% that first stage adds mass concentration, it is 2% that second stage adds mass concentration, it is 6% that phase III adds mass concentration, the time that every one-phase adds is 4.95 hours, by water injection well valve adjustment reinjected water flow process after adding, carry out normal water filling, water filling is after 3 months, re-start construction, at the well head of water injection well, the sample cock that high-pressure plunger measuring pump and water injection well inject water pipeline is connected, the original annotation Water flow-path of wellhead of water injection well is adjusted to anti-flushing well flow process, injection water discharge capacity is regulated to be 75% of water filling discharge capacity, from casing annulus, water is injected water filling layer, meanwhile start plunger displacement pump, mate with injection water discharge capacity and add B agent prescription, adding mass concentration is 5%, joining day is 6 hours, add the constant continuation water filling of rear injection water discharge capacity 4 hours, startup high-pressure plunger measuring pump mates with injection water discharge capacity and adds corrosion control treatment agent formula, add concentration and divide 3 identical stages, it is 1% that first stage adds mass concentration, it is 2% that second stage adds mass concentration, it is 6% that phase III adds mass concentration, the time that every one-phase adds is 4.95 hours, by water injection well valve adjustment reinjected water flow process after adding, carry out normal water filling, water filling is after 3 months again, repeat aforesaid operations again, the rest may be inferred.
The B agent prescription of the annular space tubing and casing tube wall incrustation thing cleaning agent injected, its mass percent consists of: 6%HCL, 2% phytic acid, 13% hydroxy ethylene diphosphonic acid, 4%1,6-hexapotassium, 0.5% ammonium thiocyanate, 0.8% pyridine benzyl dichloride quaternary ammonium salt, 1.5% methenamine, 0.3% propilolic alcohol, 0.01% KI, 0.5% octadecylamine APEO (1825), 0.5% bisoctyl dimethyl ammonium bromide, the ethylene oxide condensate EL-20 of 0.3% castor oil, 0.1% demulsifier, 5% glycerine, 6% ethylene glycol monobutyl ether, surplus are clear water.
The corrosion control treatment agent formula injected, the mass percent of its formula consists of: 16% imidazoline APEO, 11% quinoline benzyl chloride quaternary ammonium salt, 3% octadecyl trimethyl ammonium chloride, 7% dodecyl dimethyl benzyl ammonium bromide, 6% didecyl Dimethy ammonium chloride, 3% methenamine, 1.5% butynediols, 0.15% tetramethyl KI, surplus are clear water.
Field conduct water injection well meter 7 mouthfuls, the bacterial content through tracking and testing water injection well annular space medium is all less than 15/mL, and corrosion rate is all less than 0.051mm/a.
Embodiment six
The present embodiment is the water injection well (well depth 2800m, the water injection rate 45m that do not have recycle-water pipeline
3/ d).
The construction technology of the present embodiment, step is: as Fig. 1 connects flow process, at the well head of water injection well, the sample cock that high-pressure plunger measuring pump and water injection well inject water pipeline is connected, the original annotation Water flow-path of wellhead of water injection well is adjusted to anti-flushing well flow process, injection water discharge capacity is regulated to be 75% of water injection rate, from casing annulus, water is injected water filling layer, meanwhile start plunger displacement pump, mate with injection water discharge capacity, add a kind of B agent prescription of annular space tubing and casing tube wall incrustation thing cleaning agent, adding mass concentration is 15%, joining day is 18.5 hours, D
coverfor water injection well casing diameter mm, D
oilfor injection well tubing diameter mm, L are that injection well tubing depth of setting m, Q are for injecting water discharge capacity m
3/ h, add the constant continuation water filling of rear injection water discharge capacity after 4 hours, startup high-pressure plunger measuring pump mates with injection water discharge capacity and adds corrosion control treatment agent formula, add concentration and divide 3 identical stages, it is 1% that first stage adds mass concentration, it is 2% that second stage adds mass concentration, it is 6% that phase III adds mass concentration, the time that every one-phase adds is 6 hours, by water injection well valve adjustment reinjected water flow process after adding, carry out normal water filling, water filling is after 3 months, re-start construction, at the well head of water injection well, the sample cock that high-pressure plunger measuring pump and water injection well inject water pipeline is connected, the original annotation Water flow-path of wellhead of water injection well is adjusted to anti-flushing well flow process, injection water discharge capacity is regulated to be 75% of water filling discharge capacity, from casing annulus, water is injected water filling layer, meanwhile start plunger displacement pump, mate with injection water discharge capacity and add B agent prescription, adding mass concentration is 5%, joining day is 6 hours, add the constant continuation water filling of rear injection water discharge capacity 4 hours, startup high-pressure plunger measuring pump mates with injection water discharge capacity and adds corrosion control treatment agent formula, add concentration and divide 3 identical stages, it is 1% that first stage adds mass concentration, joining day T
2(h), it is 2% that second stage adds mass concentration, and it is 6% that the phase III adds mass concentration, the time that every one-phase adds is 6 hours, by water injection well valve adjustment reinjected water flow process after adding, carries out normal water filling, water filling is after 3 months again, then repeats aforesaid operations, and the rest may be inferred.
The B agent prescription of the annular space tubing and casing tube wall incrustation thing cleaning agent injected, its mass percent consists of: 3%HCL, 5% phytic acid, 12% hydroxy ethylene diphosphonic acid, 7%1,6-hexapotassium, 0.3% ammonium thiocyanate, 1% pyridine benzyl dichloride quaternary ammonium salt, 2% methenamine, 0.5% propilolic alcohol, 0.01% KI, 0.5% octadecylamine APEO (1825), 0.5% bisoctyl dimethyl ammonium bromide, the ethylene oxide condensate EL-20 of 0.3% castor oil, 0.1% demulsifier, 5% glycerine, 6% ethylene glycol monobutyl ether, surplus are clear water.
The corrosion control treatment agent formula injected, the mass percent of its formula consists of: 16% imidazoline APEO, 11% quinoline benzyl chloride quaternary ammonium salt, 3% octadecyl trimethyl ammonium chloride, 7% dodecyl dimethyl benzyl ammonium bromide, 6% didecyl Dimethy ammonium chloride, 3% methenamine, 1.5% butynediols, 0.15% tetramethyl KI, surplus are clear water;
Field conduct water injection well meter 12 mouthfuls, the bacterial content through tracking and testing water injection well annular space medium is all less than 9.5/mL, and corrosion rate is all less than 0.044mm/a.
Embodiment seven
The present embodiment is the water injection well (well depth 1200m, the water injection rate 50m that do not have recycle-water pipeline
3/ d).
The construction technology of the present embodiment, step is: as Fig. 1 connects flow process, at the well head of water injection well, the sample cock that high-pressure plunger measuring pump and water injection well inject water pipeline is connected, the original annotation Water flow-path of wellhead of water injection well is adjusted to anti-flushing well flow process, injection water discharge capacity is regulated to be 75% of water injection rate, from casing annulus, water is injected water filling layer, meanwhile start plunger displacement pump, mate with injection water discharge capacity, add a kind of B agent prescription of annular space tubing and casing tube wall incrustation thing cleaning agent, adding mass concentration is 15%, joining day is 7.42 hours, D
coverfor water injection well casing diameter mm, D
oilfor injection well tubing diameter mm, L are that injection well tubing depth of setting m, Q are for injecting water discharge capacity m
3/ h, add the constant continuation water filling of rear injection water discharge capacity after 4 hours, startup high-pressure plunger measuring pump mates with injection water discharge capacity and adds corrosion control treatment agent formula, add concentration and divide 3 identical stages, it is 1% that first stage adds mass concentration, it is 2% that second stage adds mass concentration, it is 6% that phase III adds mass concentration, each period of joining day is 2.31 hours, by water injection well valve adjustment reinjected water flow process after adding, carry out normal water filling, water filling is after 3 months, re-start construction, at the well head of water injection well, the sample cock that high-pressure plunger measuring pump and water injection well inject water pipeline is connected, the original annotation Water flow-path of wellhead of water injection well is adjusted to anti-flushing well flow process, injection water discharge capacity is regulated to be 75% of water filling discharge capacity, from casing annulus, water is injected water filling layer, meanwhile start plunger displacement pump, mate with injection water discharge capacity and add B agent prescription, adding mass concentration is 5%, joining day is 6 hours, add the constant continuation water filling of rear injection water discharge capacity 4 hours, startup high-pressure plunger measuring pump mates with injection water discharge capacity and adds corrosion control treatment agent formula, add concentration and divide 3 identical stages, it is 1% that first stage adds mass concentration, it is 2% that second stage adds mass concentration, it is 6% that phase III adds mass concentration, each period of joining day is 2.31 hours, by water injection well valve adjustment reinjected water flow process after adding, carry out normal water filling, water filling is after 3 months again, repeat aforesaid operations again, the rest may be inferred.
The B agent prescription of the annular space tubing and casing tube wall incrustation thing cleaning agent injected, its mass percent consists of: 3%HCL, 5% phytic acid, 8% hydroxy ethylene diphosphonic acid, 7%1,6-hexapotassium, 0.4% ammonium thiocyanate, 1.2% pyridine benzyl dichloride quaternary ammonium salt, 1.5% methenamine, 0.4% propilolic alcohol, 0.015% KI, 0.6% octadecylamine APEO (1825), 0.4% bisoctyl dimethyl ammonium bromide, the ethylene oxide condensate EL-20 of 0.3% castor oil, 0.15% demulsifier, 8% glycerine, 4% ethylene glycol monobutyl ether, surplus are clear water.
The corrosion control treatment agent formula injected, the mass percent of its formula consists of: 21% imidazoline APEO, 6% quinoline benzyl chloride quaternary ammonium salt, 4% octadecyl trimethyl ammonium chloride, 6% dodecyl dimethyl benzyl ammonium bromide, 9% didecyl Dimethy ammonium chloride, 5% methenamine, 1.0% butynediols, 0.2% tetramethyl KI, surplus are clear water.
Field conduct water injection well meter 7 mouthfuls, the bacterial content through tracking and testing water injection well annular space medium is all less than 11.5/mL, and corrosion rate is all less than 0.055mm/a.
Due to different oil field, the water injection well of different blocks injects the difference of aqueous medium characteristic, bacterial content is different, corrosivity is different, also different to the requirement of each component in A formula, B agent prescription, corrosion control treatment agent formula, right to include but not limited to described in article component and the content of each formula, and any one comprises A, B agent prescription that different component described in right and different content form, corrosion control treatment agent formula all belongs within the scope of claim.
Claims (5)
1. a water injection well in oil fields annular space tubing and casing process for corrosion control, is characterized in that, water injection well has recycle-water pipeline, comprises the following steps:
At the well head of water injection well, the sample cock that high-pressure plunger measuring pump and water injection well inject water pipeline is connected, the original annotation Water flow-path of wellhead of water injection well is adjusted to anti-flushing well flow process, open the recycle-water single well pipeline valve of distributing room for water injection, regulate well-flushing discharge capacity to be 25m
3/ h, well-flushing, after 1.5 hours, reduces well-flushing discharge capacity to 10m
3/ h, start high-pressure plunger measuring pump and mate with well-flushing water discharge capacity, and add a kind of A agent prescription of annular space tubing and casing tube wall incrustation thing cleaning agent, adding mass concentration is 25%, and the joining day is T
1(h)=0.785 × 10
-7× L × (D
2 cover-D
2 oil)+0.1, D
coverfor water injection well casing diameter mm, D
oilfor injection well tubing diameter mm, L are injection well tubing depth of setting m, then reduction plunger displacement pump discharge capacity makes A agent add mass concentration is 5%, and the joining day is 4 hours, the dosing of stop plunger pump, improves well-flushing water discharge capacity to 25m
3/ h, duration of well flushing is T
2(h)=0.314 × 10
-7× L × D
2 cover+ 0.5, regulate well-flushing water discharge capacity to be 15m
3/ h, start high-pressure plunger measuring pump and mate with well-flushing water discharge capacity, and add corrosion control inorganic agent, add concentration and divide 3 stages, it is 1% that the first stage adds mass concentration, and the joining day is T
3(h)=0.175 × 10
-7× L (D
2 cover-D
2 oil), it is 2% that second stage adds mass concentration, and the joining day is T
3h (), it is 6% that the phase III adds mass concentration, and the joining day is T
3(h), adding rear adjustment water injection well valve is water filling flow process, carries out normal water filling; Water filling, after 3 months, re-starts construction, at the well head of water injection well, the sample cock that high-pressure plunger measuring pump and water injection well inject water pipeline is connected, the original annotation Water flow-path of wellhead of water injection well is adjusted to anti-flushing well flow process, opens the recycle-water single well pipeline valve of distributing room for water injection, regulate well-flushing discharge capacity to be 25m
3/ h, after well-flushing 60min, reduces well-flushing discharge capacity to 10m
3/ h, start high-pressure plunger measuring pump and mate with well-flushing water discharge capacity, and add A agent prescription, adding mass concentration is 5%, and the joining day is after 3 hours, the dosing of stop plunger pump, improves well-flushing water discharge capacity to 25m
3/ h, well-flushing, after 2 hours, reduces well-flushing water discharge capacity to 15m
3/ h, start high-pressure plunger measuring pump and mate with well-flushing water discharge capacity, and add corrosion control treatment agent formula, add concentration and divide 3 stages, it is 1% that the first stage adds concentration, and the joining day is T
3h (), it is 2% that second stage adds mass concentration, and the joining day is T
3h (), it is 6% that the phase III adds mass concentration, and the joining day is T
3h (), by water injection well valve adjustment reinjected water flow process after adding, carries out normal water filling; Water filling is after 3 months again, then repeats aforesaid operations, and the rest may be inferred.
2. a water injection well in oil fields annular space tubing and casing process for corrosion control, it is characterized in that, water injection well does not have recycle-water pipeline, comprise the following steps: at the well head of water injection well, the sample cock that high-pressure plunger measuring pump and water injection well inject water pipeline is connected, the original annotation Water flow-path of wellhead of water injection well is adjusted to anti-flushing well flow process, injection water discharge capacity is regulated to be 75% of injection flow, from casing annulus, water is injected water filling layer, meanwhile start plunger displacement pump, mate with injection water discharge capacity, add a kind of B agent prescription of annular space tubing and casing tube wall incrustation thing cleaning agent, adding mass concentration is 15%, joining day is T
1(h)=0.785 × 10
-6× L (D
2 cover-D
2 oil)/Q+0.5, D
coverfor water injection well casing diameter mm, D
oilfor injection well tubing diameter mm, L are that injection well tubing depth of setting m, Q are for injecting water discharge capacity m
3/ h, added the constant continuation water filling of rear injection water discharge capacity after 4 hours, and startup high-pressure plunger measuring pump mates with injection water discharge capacity and adds corrosion control treatment agent formula, and add concentration and divide 3 stages, it is 1% that the first stage adds mass concentration, joining day T
2(h)=0.262 × 10
-6× L (D
2 cover-D
2 oil)/Q, it is 2% that second stage adds mass concentration, and the joining day is T
2h (), it is 6% that the phase III adds mass concentration, and the joining day is T
2(h), by water injection well valve adjustment reinjected water flow process after adding, carry out normal water filling, water filling is after 3 months, re-start construction, at the well head of water injection well, the sample cock that high-pressure plunger measuring pump and water injection well inject water pipeline is connected, the original annotation Water flow-path of wellhead of water injection well is adjusted to anti-flushing well flow process, injection water discharge capacity is regulated to be 75% of water filling discharge capacity, from casing annulus, water is injected water filling layer, meanwhile start plunger displacement pump, mate with injection water discharge capacity and add B agent prescription, adding mass concentration is 5%, joining day is 6 hours, add the constant continuation water filling of rear injection water discharge capacity 4 hours, startup high-pressure plunger measuring pump mates with injection water discharge capacity and adds corrosion control treatment agent formula, add concentration and divide 3 stages, it is 1% that first stage adds mass concentration, joining day T
2h (), it is 2% that second stage adds mass concentration, and the joining day is T
2h (), it is 6% that the phase III adds mass concentration, and the joining day is T
2h (), by water injection well valve adjustment reinjected water flow process after adding, carry out normal water filling, water filling is after 3 months again, then repeats aforesaid operations, and the rest may be inferred.
3. a kind of water injection well in oil fields annular space tubing and casing process for corrosion control according to claim 1, it is characterized in that, the A agent prescription of described a kind of annular space tubing and casing tube wall incrustation thing cleaning agent, its mass percent consists of: 0 ~ 20%HCL, 0 ~ 15% glycolic acid, 0 ~ 5% potassium permanganate, 0.1 ~ 1% quinoline dichloroetane quaternary ammonium salt, 0.1 ~ 2% methenamine, 0.01 ~ 0.5% propilolic alcohol, 0.001 ~ 0.05% KI, 0.1 ~ 2% octadecylamine APEO, the ethylene oxide condensate EL-20 of 0.1 ~ 2% castor oil, surplus is clear water.
4. a kind of water injection well in oil fields annular space tubing and casing process for corrosion control according to claim 2, it is characterized in that, the B agent prescription of described a kind of annular space tubing and casing tube wall incrustation thing cleaning agent, its mass percent consists of: 0 ~ 10%HCL, 0 ~ 5% phytic acid, 0 ~ 15% hydroxy ethylene diphosphonic acid, 0 ~ 10%1, 6-hexapotassium, 0.1 ~ 2% ammonium thiocyanate, 0.1 ~ 1% pyridine benzyl dichloride quaternary ammonium salt, 0.5 ~ 2% methenamine, 0.01 ~ 0.5% propilolic alcohol, 0.001 ~ 0.05% KI, 0.1 ~ 2% octadecylamine APEO, 0.01 ~ 1% bisoctyl dimethyl ammonium bromide, the ethylene oxide condensate EL-20 of 0.1 ~ 2% castor oil, 0 ~ 2% demulsifier, 0 ~ 10% glycerine, 0 ~ 10% ethylene glycol monobutyl ether, surplus is clear water.
5. a kind of water injection well in oil fields annular space tubing and casing process for corrosion control according to claim 1 and 2, it is characterized in that, described corrosion control treatment agent formula, the mass percent of its formula consists of: 5 ~ 30% imidazoline APEOs, 3 ~ 15% quinoline benzyl chloride quaternary ammonium salts, 1 ~ 10% octadecyl trimethyl ammonium chloride, 1 ~ 20% dodecyl dimethyl benzyl ammonium bromide, 1 ~ 30% didecyl Dimethy ammonium chloride, 1 ~ 5% methenamine, 0.5 ~ 5% butynediols, 0.5 ~ 5% tetramethyl KI, surplus are clear water.
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| CN103790553B (en) * | 2014-02-28 | 2017-02-15 | 西安石油大学 | Control method of scaling in oil well production process |
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| CN104265240A (en) * | 2014-07-26 | 2015-01-07 | 中国石油天然气股份有限公司 | Added water diluting electric wellhead dosing process |
| CN105733541B (en) * | 2014-12-11 | 2018-07-31 | 中国石油化工股份有限公司 | Corrosion inhibiting and descaling agent composition and its application and oil-field flooding pit shaft corrosion protection method of scale inhibition |
| CN105863560B (en) * | 2016-05-25 | 2018-09-25 | 辽宁瑞达石油技术有限公司 | Oil well steam hot wash and the compound wax removal system of chemical agent and compound dewaxing method |
| CN106285566A (en) * | 2016-08-01 | 2017-01-04 | 中嵘能源科技集团有限公司 | A kind of air injection anticorrosion completion method and the inhibition acid solution wherein used |
| US11525186B2 (en) | 2019-06-11 | 2022-12-13 | Ecolab Usa Inc. | Corrosion inhibitor formulation for geothermal reinjection well |
| CN113337263A (en) * | 2021-05-31 | 2021-09-03 | 中石化重庆页岩气有限公司 | Corrosion inhibition bactericide for normal-pressure shale gas field |
| US11939850B2 (en) | 2022-01-07 | 2024-03-26 | Saudi Arabian Oil Company | Apparatus for TCA bleed off and well start-up |
| CN114574183A (en) * | 2022-02-15 | 2022-06-03 | 陕西化工研究院有限公司 | CO (carbon monoxide)2Imidazoline-pyridine composite corrosion inhibitor for oil displacement |
| CN115820237B (en) * | 2022-12-14 | 2024-02-06 | 泰坦(天津)能源技术有限公司 | Corrosion inhibitor for carbon dioxide flooding and preparation method thereof |
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Inventor after: Wang Xiangzeng Inventor after: Guo Xuehui Inventor after: Du Suzhen Inventor after: Liu Li Inventor after: Tao Hongsheng Inventor after: Li Guoming Inventor after: Yu Haitang Inventor after: Bai Li Inventor after: Li Lei Inventor before: Wang Xiangzeng Inventor before: Guo Xuehui Inventor before: Du Suzhen Inventor before: Liu Li Inventor before: Tao Hongsheng Inventor before: Li Guoming Inventor before: Yu Haitang Inventor before: Bai Li Inventor before: Li Lei |
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