CN102167450B - Special corrosion and scale inhibitor for oilfield reinjection water and preparation method of corrosion and scale inhibitor - Google Patents
Special corrosion and scale inhibitor for oilfield reinjection water and preparation method of corrosion and scale inhibitor Download PDFInfo
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- CN102167450B CN102167450B CN2011100607400A CN201110060740A CN102167450B CN 102167450 B CN102167450 B CN 102167450B CN 2011100607400 A CN2011100607400 A CN 2011100607400A CN 201110060740 A CN201110060740 A CN 201110060740A CN 102167450 B CN102167450 B CN 102167450B
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- corrosion
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- deionized water
- scale inhibitor
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Abstract
The invention belongs to the technical field of water treatment, in particular relates to a special corrosion and scale inhibitor for oil field reinjection water and a preparation method of the corrosion and scale inhibitor. The special corrosion and scale inhibitor for oil field reinjection water is prepared by compounding the following materials in percentage by weight: 5-20 percent of 2-phosphonobutane-1,2,4-tricarboxylic butane, 15-30 percent of polymaleic acid, 10-25 percent of oleic-acid-based bicyclo-imidazoline corrosion inhibitor, 2-5 percent of zinc sulfate, 3-10 percent of sodium sulfite and the balance of deionized water. The preparation method comprises the following steps of: dissolving the zinc sulfate and the sodium sulfite with deionized water in a reactor, wherein the deionized water accounts for 1/5 of the total amount of the deionized water; then adding the 2-phosphonobutane-1,2,4-tricarboxylic butane, the polymaleic acid, the oleic-acid-based bicyclo-imidazoline corrosion inhibitor and the balance of deionized water; and stirring for 45-55 minutes under normal temperature. The special corrosion and scale inhibitor has the advantages of good corrosion and scale inhibition effect, less consumption and simple and easy preparation process.
Description
Technical field
The invention belongs to water-treatment technology field, be specifically related to a kind of oil field reinjection water special corrosion and scale inhibitor and preparation method thereof.
Background technology
The water temperature of oil field return water is higher, generally about 60 ℃, and sometimes also can be higher; Water quality is relatively poor, and the material of water filling equipment used, pipeline is generally carbon steel, and the fouling of waterflood system burn into is serious, affects crude production.In order to solve the burn into scale problems, add corrosion inhibiting and descaling agent to waterflood system.At present used corrosion inhibiting and descaling agent consumption is bigger than normal, is generally about 50mg/l, and inhibition, scale inhibition performance is on the low side, and general corrosion inhibition rate is about 73%, and scale inhibition performance is about 85%.
Summary of the invention
Technical problem to be solved by this invention is the deficiency that exists to prior art, and a kind of oil field reinjection water special corrosion and scale inhibitor is provided, and better prevents and slowed down the corrosion and the fouling of oil field flood pattern; The present invention provides its preparation method simultaneously.
Oil field reinjection water special corrosion and scale inhibitor of the present invention is characterized in that forming by the material of following weight percent is composite:
Described 2-phosphonate group-1,2,4-butane tricarboxylate (PBTCA) is the commercially available prod, liquid, active constituent (in PBTC) mass content >=50.0%.
Described polymaleic acid is the commercially available prod, brown yellow transparent liquid, solid content >=48.0%.
Described oleic acid base bicyclic imidazo quinoline inhibiter is the commercially available prod, weak yellow liquid, the mass content of actives >=40.0%.
The preparation method of oil field reinjection water special corrosion and scale inhibitor of the present invention may further comprise the steps:
(1) in reaction kettle, adds with deionized water dissolved zinc sulfate and S-WAT deionized water consumption 3/5 of the ionized water total amount that accounts for;
(2) continue in reaction kettle, to add 2-phosphonate group-1,2,4-butane tricarboxylate, polymaleic acid and oleic acid base bicyclic imidazo quinoline inhibiter and remaining deionized water, normal temperature stir down and processed in 45～55 minutes.
Oil field reinjection water special corrosion and scale inhibitor of the present invention is the liquid preparation that the equipment of oil field reinjection water system and pipeline is played inhibition, scale-inhibiting properties, and the present invention is nontoxic, harmless, slant acidity; It is a kind of plyability product; Corrosion inhibition rate >=95%, scale inhibition performance＞97%, consumption are 30～40mg/l.
Each component of corrosion inhibiting and descaling agent of the present invention has good compatibleness, complementarity and synergetic property: 2-phosphonate group-1; 2; The 4-butane tricarboxylate has good scale-inhibiting properties; It is good also to have certain corrosion inhibition and heat resistance simultaneously concurrently, and not hydrolysis in up to 120 ℃ of water belongs to low-phosphorous organic phospho acid and is not easy to microbial reproduction; The polymaleic acid temperature tolerance is fine, in the time of 330 ℃, does not decompose, and the generation and the growth of dirt had good lattice dissemination; Oleic acid base bicyclic imidazo quinoline belongs to novel, efficient, high temperature resistant inhibiter, uses separately, and under 6～8mg/l, its corrosion inhibition rate can reach about 97%, and better through rational composite corrosion mitigating effect, consumption still less; Zinc salt is a kind of inhibition auxiliary agent at this, and it and 2-phosphonate group-1,2 after the collaborative collocation of 4-butane tricarboxylate, can improve 2-phosphonate group-1,2,4-butane tricarboxylate's corrosion inhibiting ability.S-WAT has the good restraining effect to the corrosion of water oxygen, and inhibition is had good assisting.
Compared with prior art, beneficial effect of the present invention is following:
Oil field reinjection water special corrosion and scale inhibitor of the present invention inhibition, scale inhibition effect are good, and consumption is few and preparation technology is simple, corrosion inhibition rate >=95%, and scale inhibition performance＞97%, consumption are 30～40mg/l.Better prevent and slowed down the corrosion and the fouling of oil field flood pattern, prolonged the work-ing life of equipment and pipeline, guaranteed effectively carrying out of crude production, improved oil recovery.
Description of drawings
Fig. 1 jujube one sewage works artwork.
Embodiment
Below in conjunction with embodiment the present invention is done and to further describe.
Embodiment 1
A kind of oil field reinjection water special corrosion and scale inhibitor forms by the material of following weight percent is composite:
The preparation method may further comprise the steps:
(1) in reaction kettle, adds with deionized water dissolved zinc sulfate and S-WAT deionized water consumption 3/5 of the ionized water total amount that accounts for;
(2) in reaction kettle, add 2-phosphonate group-1,2,4-butane tricarboxylate, polymaleic acid and oleic acid base bicyclic imidazo quinoline inhibiter and remaining deionized water, normal temperature stir down and processed in 50 minutes.
Embodiment 2
A kind of oil field reinjection water special corrosion and scale inhibitor forms by the material of following weight percent is composite:
The preparation method may further comprise the steps:
(1) in reaction kettle, adds with deionized water dissolved zinc sulfate and S-WAT deionized water consumption 3/5 of the ionized water total amount that accounts for;
(2) in reaction kettle, add 2-phosphonate group-1,2,4-butane tricarboxylate, polymaleic acid and oleic acid base bicyclic imidazo quinoline inhibiter and remaining deionized water, normal temperature stir down and processed in 50 minutes.
Embodiment 3
A kind of oil field reinjection water special corrosion and scale inhibitor forms by the material of following weight percent is composite:
The preparation method may further comprise the steps:
(1) in reaction kettle, adds with deionized water dissolved zinc sulfate and S-WAT deionized water consumption 3/5 of the ionized water total amount that accounts for;
(2) in reaction kettle, add 2-phosphonate group-1,2,4-butane tricarboxylate, polymaleic acid and oleic acid base bicyclic imidazo quinoline inhibiter and remaining deionized water, normal temperature stir down and processed in 50 minutes.
Embodiment 4
A kind of oil field reinjection water special corrosion and scale inhibitor forms by the material of following weight percent is composite:
The preparation method may further comprise the steps:
(1) in reaction kettle, adds with deionized water dissolved zinc sulfate and S-WAT deionized water consumption 3/5 of the ionized water total amount that accounts for;
(2) in reaction kettle, add 2-phosphonate group-1,2,4-butane tricarboxylate, polymaleic acid and oleic acid base bicyclic imidazo quinoline inhibiter and remaining deionized water, normal temperature stir down and processed in 50 minutes.
Industrial application example 1
Certain oil recovery factory, oil field two ore deposit thalliums, six joint station will be handled gas, oil, water mixture 23000m from the field of recovering the oil every day
3, be introduced into triphase separator (jar) after this mixture comes and carry out the separation of gas, oil, water, still contain a certain amount of oil in the water of separating; This water gets into water-and-oil separator (jar) again and carries out oily water separation; The water separated gets into settling tank, after precipitate and separate, gets into the water purification jar, in the water purification jar, treated oil in the water is separated once again from water; Water gets into surge tank by being pumped into the oil-extracting and water-injecting pipeline then, carries out oil-field flooding.The water quality situation is seen table 1.
Table 1 water quality test data
Annotate: calcium ion, mg ion, total hardness, total alkalinity are all with C
aCO
3Meter.
Can be known that by table 2 this water belongs to high hard, high salt, high chloride ion, high sulfide, high COD water, according to rower SY/T5329-94, when sulfide content during greater than 2.0mg/L, water body will produce corrosion.Its water temperature is about 60 ℃; Equipment and pipeline are very easily produced serious corrosion and fouling; For preventing and slowing down equipment, Corrosion of Pipeline, fouling; Added oil field reinjection water special corrosion and scale inhibitor LS-307 of the present invention in the water before this unit is advancing surge tank in June, 2010, used in January, 2011, scale inhibition situation and inhibition situation are shown in table 2 and table 3.
Table 2 scale inhibition situation
Table 3 inhibition situation
Annotate: standard lacing film, material: A
3Carbon steel.
Experimental data by table 2 and table 3 is learnt, oil field reinjection water special corrosion and scale inhibitor of the present invention plays a good role to inhibition, the scale inhibition of equipment, pipeline, corrosion inhibition rate >=95%, and scale inhibition performance >=97%, dosing is few, and the corrosion-mitigation scale-inhibition rate is high.
Industrial application example 2
The oil field got into after the middle and later periods of exploitation, and sand pressure descends very big, and water flood recovery is to suppress the important means that reservoir pressure descends, improves oil recovery.9 of the existing water-injection plants in certain jujube field district, southern oil field, promptly jujube one is annotated, jujube two is annotated, jujube three is annotated, jujube four is annotated, jujube five is annotated, family five annotates, family eight annotates, annotate and annotate from six from one.Design water-injection capability 16200m
3/ d, actual bets water yield 10906m
3/ d (clear water: 1151m
3/ d, sewage: 9755m
3/ d), the water filling water source overwhelming majority is drawn from jujube one sewage works, and insufficient section replenishes with clear water.Its technological process is as shown in Figure 1, and jujube one injection water quality detects data and sees table 4.
Table 4 jujube one water quality testing data
Can find out that by table 4 jujube one re-injection water salinity is high, nearly 30000mg/L, Cl
-Content is big, and the solvability sulfide content is 14.8mg/L, and suspension content is 11.1mg/L, and sewage PH value is on the low side to be 7.2.Sulphate reducing bacteria is 3.9 * 10
2Individual/mL.According to rower SY/T5329-94, when sulfide content during greater than 2.0mg/L, water body can produce corrosion.This water quality corrodibility is serious, and matter of utmost importance is corrosion.
Jujube one waterflood system present situation:
1, hanging film scene monitoring result:
To 2009 9,10, the outer delivery port sewage (water that promptly is used for oil-field flooding) of jujube one sewage works in November, to test, erosion rate is seen table 5:
Table 5 hanging film scene situation
Can be found out that by last table 5 the outer output re-injection aqueous corrosion speed of jujube one is more than the 2.65mm/a, overall corrosion is more serious.
2, water filling pit shaft dirt appearance and waterflood-transmission line dirt appearance analysis in table 6.
Table 6 water filling pit shaft dirt appearance and waterflood-transmission line dirt appearance chemical examination situation
Can find out from last table 6: water filling pit shaft dirt appearance loam sand accounts for 23.3%, and iron cpd accounts for 51.8%, and incrustation scale is few.Loam sand accounts for 30.5% in the waterflood-transmission line dirt appearance, and iron cpd accounts for 52.9%, and incrustation scale is also few.Foundry loam and silt particle mainly are mikrobe in the return water, bacterium and suspended substance, and adhesion deposition is on pipeline and form.Iron cpd forms because of corrosion, accounts for more than 50% of dirt appearance amount.Subject matter is corrosion and foundry loam.
This unit began in water filling, to add the oil field reinjection water special corrosion and scale inhibitor LS-307 that my company's research and development are produced in March, 2010, used in January, 2011 situation such as table 7 and table 8.
Table 7 inhibition situation
Annotate: standard lacing film, material: A
3Carbon steel
Table 8 scale inhibition situation
Experimental data by table 7 and table 8 is learnt, oil field reinjection water special corrosion and scale inhibitor of the present invention plays a good role to inhibition, the scale inhibition of equipment, pipeline, corrosion inhibition rate >=95%, and scale inhibition performance >=97%, dosing is few, and the corrosion-mitigation scale-inhibition rate is high.
Claims (1)
1. oil field reinjection water special corrosion and scale inhibitor is characterized in that forming by following raw materials by weight percent is composite:
2-phosphonate group-1,2,4-butane tricarboxylate 5～20%;
Polymaleic acid 15～30%;
Oleic acid base bicyclic imidazo quinoline inhibiter 10～25%;
Zinc sulfate 2～5%;
S-WAT 3～10%;
The deionized water surplus;
Composite may further comprise the steps:
(1) in reaction kettle, adds with deionized water dissolved zinc sulfate and S-WAT deionized water consumption 3/5 of the ionized water total amount that accounts for;
(2) continue in reaction kettle, to add 2-phosphonate group-1,2,4-butane tricarboxylate, polymaleic acid and oleic acid base bicyclic imidazo quinoline inhibiter and remaining deionized water, normal temperature stir down and processed in 45～55 minutes.
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| CN2011100607400A CN102167450B (en) | 2011-03-14 | 2011-03-14 | Special corrosion and scale inhibitor for oilfield reinjection water and preparation method of corrosion and scale inhibitor |
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| CN2011100607400A CN102167450B (en) | 2011-03-14 | 2011-03-14 | Special corrosion and scale inhibitor for oilfield reinjection water and preparation method of corrosion and scale inhibitor |
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| CN102167450B true CN102167450B (en) | 2012-06-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2677442C1 (en) * | 2018-01-17 | 2019-01-16 | Алёна Андреевна Селянина | Method of stabilization of iron archaeological objects in ultrasonic field |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11286187B2 (en) | 2020-03-02 | 2022-03-29 | Saudi Arabian Oil Company | Iron sulfide scale inhibition in an oil production system |
| CN112094669B (en) * | 2020-09-15 | 2022-05-24 | 中科合成油内蒙古有限公司 | Compound oil/wax product solid remover and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101117257A (en) * | 2007-07-12 | 2008-02-06 | 北京能泰高科环保技术有限公司 | Dirty-proof inhibition composition for reclaimed water circulation sewage and preparation method and application |
| CN101746900A (en) * | 2008-12-01 | 2010-06-23 | 中国石油化工股份有限公司 | Scale inhibitor combination, preparation method thereof and sewage treatment method |
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2011
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101117257A (en) * | 2007-07-12 | 2008-02-06 | 北京能泰高科环保技术有限公司 | Dirty-proof inhibition composition for reclaimed water circulation sewage and preparation method and application |
| CN101746900A (en) * | 2008-12-01 | 2010-06-23 | 中国石油化工股份有限公司 | Scale inhibitor combination, preparation method thereof and sewage treatment method |
Non-Patent Citations (1)
| Title |
|---|
| 陈敏等.油酸基咪唑啉类缓蚀剂的合成及其缓蚀性能评价.《石化技术与应用》.2009,第27卷(第02期),第127-131页. * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2677442C1 (en) * | 2018-01-17 | 2019-01-16 | Алёна Андреевна Селянина | Method of stabilization of iron archaeological objects in ultrasonic field |
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