CN103708629A - Special solid corrosion and scale inhibitor for oilfield reinjection water - Google Patents
Special solid corrosion and scale inhibitor for oilfield reinjection water Download PDFInfo
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- CN103708629A CN103708629A CN201410001812.8A CN201410001812A CN103708629A CN 103708629 A CN103708629 A CN 103708629A CN 201410001812 A CN201410001812 A CN 201410001812A CN 103708629 A CN103708629 A CN 103708629A
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- tetrahydroglyoxaline
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Abstract
The invention discloses a special solid corrosion and scale inhibitor for oilfield reinjection water and a preparation method thereof, and belongs to a chemical composition for treatment of oilfield water. The invention particularly relates to a composition for corrosion resistance and scale inhibition in oilfield sewage treatment and reinjection processes. The corrosion and scale inhibitor is prepared from the following raw materials: 20%-50% of 40%-60% 1-hydroxyethylidene-1,1-diphosphonic acid (HEDP), 20%-50% of 40%-60% acrylic acid-maleic acid copolymer, 0-10% of 30%-60% alkyl imidazoline inhibitor, 0.1%-10% of zinc sulfate, 3%-40% of inorganic base and 10%-30% of sodium hexametaphosphate. The special solid corrosion and scale inhibitor disclosed by the invention is obtained by the raw materials through processes, such as kneading stirring, evaporating concentrating, shaping, drying and mixing. The inhibitor can be used for the water quality treatment of the oilfield reinjection water of a solid medication system, can be used for effectively reducing the decomposition of sodium hexametaphosphate in the storage period, and has very good corrosion resistance and scale inhibition effects on a reinjection water treatment system and a transportation system.
Description
Technical field
The invention belongs to the composition that suppresses corrosion and scale inhibition in the chemical composition, particularly disposing polluted water in oil processed for oil-field water, re-injection process.
Background technology
China's oil extraction in oil field generally enters the phase III at present, by re-injection water, is increased and the comprehensive mode of adopting such as to be pressed to recover the oil.Oil field reinjection water is generally the hot water of high salinity, the easy corrosion and scaling of waterflood system.For this reason, in waterflood system, add corrosion inhibiting and descaling agent.Corrosion inhibiting and descaling agent used is generally the compound system of organic phosphoric acid, polymerization of carboxylic acid and polymeric phosphate at present, is generally water solution system.This system has good limit effect and synergistic, has the advantages such as cost is low, consumption is few, easy to use, but also has following shortcoming:
1, because formulation is the aqueous solution, need to use a large amount of plastic barrels, packing cost is high, packing material weight is large.Need the thing that is recycled and packaged for this reason, increased the storage location of packing material and the cost of regulating the traffic.
2, in formula, having more than 50% is moisture, and this part moisture is invalid component, increases on foot the transportation cost of material.
3, in order to reduce packaging volume and transportation cost, conventionally will be mixed with the formula formulation of more than 30% high solids content, this formulation is easy to crystallization northerly winter solidifies, and to practical application, has increased inconvenience.
4, because formula is generally acidic aqueous solution medium, in this medium, the polymeric phosphate (as Sodium hexametaphosphate 99) with low-cost high synergistic is very easy to hydrolysis, and therefore this pharmaceutical formulation preservation period is generally no more than one month.In order to address this problem, Sodium hexametaphosphate 99 will measure separately and deposit conventionally, has increased the complicacy of operation.
Therefore, the solid corrosion and scale inhibitor of exploitation high density, becomes the active demand of oil field reinjection water water treatment.
CN101139718 discloses multiple-effect solid inhibiting anti-scale rod, by polymer shaping agent and binding agent, by corrosion-mitigation scale-inhibition composition and moisture-curing, makes certain solid shape, for down-hole, slowly discharges, and reaches the object of well cover corrosion-mitigation scale-inhibition.
CN101613599 discloses that to take organic phosphonate and inorganic phosphate be that main phosphorus is compound system, and this system is made tablet by starch by corrosion-mitigation scale-inhibition composition, adds and needs slowly to dissolve in system to be processed.
CN101805597 discloses with 2-phosphonic acids butane-1,2,4-tricarboxylic acid (PBTCA), Sodium hexametaphosphate 99 are main corrosion-mitigation scale-inhibition composition, take polyoxyethylene glycol, Si Ban and stearic acid as additive, by extrusion molding, obtain solid corrosion and scale inhibitor, for oil well, the object that reach a dosing, slowly discharges.
Although more than invention has changed the formulation of existing corrosion inhibiting and descaling agent, but mainly still take slowly-releasing as object, the down-the hole treatment that is applicable to remote oil well, advantage is to greatly reduce dispensing workload, Scale inhibitors stability increases, but also there is following deficiency: should not regulate by the concentration in its aqueous solution of variation of release rate and discharge, (2) because dissolution rate is slow, be not suitable for the solid medicine machine that big yield is processed.(3) add too much ancillary component, reduced the effective content of corrosion-mitigation scale-inhibition composition, increased cost.
Summary of the invention
The object of this invention is to provide a kind of novel oil field reinjection water special solid corrosion inhibiting and descaling agent, another object of the present invention is to provide the preparation method of this solid corrosion and scale inhibitor.
Technical scheme of the present invention is that a kind of oil field reinjection water special solid corrosion inhibiting and descaling agent, is the raw material by following weight percent, the product that uses following preparation method to make:
The preparation method of oil field reinjection water solid corrosion and scale inhibitor comprises the following steps:
(1). in kneader, add 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid to be called for short HEDP, maleic acid-acrylic acid copolymer, alkyl imidazoline inhibiter, stirring at normal temperature is even,
(2). add mineral alkali, neutralization, to pH=6～8, after adding, is mediated and is stirred 25～30 minutes under normal temperature in batches,
(3). be heated to 100～130 ℃, mediate stirring and be dried to moisture content 20%～30%,
(4). by screw extrusion press, by material moulding, dry,
(5). zinc sulfate, Sodium hexametaphosphate 99 are added, be uniformly mixed 25～30 minutes and get product.
It is commercially available prod that described 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid is called for short HEDP, liquid, and effective constituent is in HEDP, content 40～60%, wherein preferably >=50.0%;
Described maleic acid-acrylic acid copolymer is commercially available prod, brown yellow transparent liquid, active constituent content 40～60%, wherein preferably >=45.0%;
Described alkyl imidazoline inhibiter is commercially available prod, weak yellow liquid, the mass content 30～60% of actives, wherein preferably >=50.0%, described actives is straight chained alkyl tetrahydroglyoxaline or branched-chain alkyl tetrahydroglyoxaline or cycloalkyl tetrahydroglyoxaline, or the mixture of one or two or more wherein, described straight chained alkyl tetrahydroglyoxaline comprises the wherein mixture of one or two or more of lauryl imidazoline, tetradecyl tetrahydroglyoxaline, hexadecyl tetrahydroglyoxaline, octadecyl tetrahydroglyoxaline
Described zinc sulfate is Industrial products, is Zincomed, Zinc Sulphate Monohydrate, Zinc Sulphate Heptahydrate, the mixture of one or two or more wherein, and its consumption is according to the mass metrology that is converted to Zincomed;
Described mineral alkali is the wherein mixture of one or two or more of sodium hydroxide, aqueous sodium hydroxide solution, sodium carbonate, sodium bicarbonate, and its consumption is according to being converted to the mass metrology of sodium hydroxide with mole numbers such as sodium hydroxide.
Described preparation method, is heated to 100～130 ℃ described in step (3), mediates to stir to be dried to moisture content 20%～30%, can, according to forcing machine needs, omit this step.
Oil field reinjection water solid corrosion and scale inhibitor of the present invention can be packed with the woven bag of general inner lining plastic bag, is convenient to accumulating and management, and long quality-guarantee period is easy to use, can be directly used in the solid medicine machine in current oil field.Pharmaceutical formulation of the present invention is nontoxic, harmless, neutral, corrosion inhibition rate >=95%, and scale inhibition performance >=95%, consumption is 10～20mg/l.
Each component of corrosion inhibiting and descaling agent of the present invention has good compatibleness, complementarity and synergetic property: 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid has good scale-inhibiting properties, for the representative that is corrosion inhibiting and descaling agent of domestic the most frequently used organophosphorus, also have certain corrosion inhibition concurrently simultaneously, and heat resistance is good, be particularly suitable for oil field high temperature re-injection water; Horse propylene copolymer, has good lattice dissemination to dirty generation and growth; Alkyl imidazoline belongs to novel, efficient, high temperature resistant corrosion inhibitor, the corrosion inhibition rate of its ppm level can reach 97% left and right, and better through rational composite corrosion mitigating effect, consumption is still less; Zinc salt is as a kind of inhibition auxiliary agent, and it and HEDP work in coordination with after collocation, can improve the corrosion inhibiting ability of HEDP.Sodium hexametaphosphate 99 is limit Scale inhibitors, composite with HEDP, has splendid synergistic and limit effect, inhibition is also had to good assisting simultaneously.
Compared with prior art, beneficial effect of the present invention is as follows:
1, anticorrosion-antiscaling effect is good.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 is 30～40mg/l.Better prevent and slowed down corrosion and the fouling of oil field flood pattern, extended the work-ing life of e-quipment and pipe, guaranteed effectively carrying out of crude production, improved oil recovery.
2, preparation is solid, and the active constituent content of product is high, is convenient to pack accumulating and use.
3, applicable to the existing sewage works in oil field and on-site solids chemicals dosing plant.
4, the recovery transportation cost that has reduced packaging facilities, meets the requirement of environmental protection.
5, preparation moisture reduces, and stability improves, the validity period that has greatly extended preparation.
Embodiment
The specific embodiment of the present invention is:
Embodiment 1, and a kind of oil field reinjection water special solid corrosion inhibiting and descaling agent, is the raw material by following weight percent, the product that uses following preparation method to make:
The preparation method of oil field reinjection water solid corrosion and scale inhibitor comprises the following steps:
(1). in kneader, add 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid to be called for short HEDP, maleic acid-acrylic acid copolymer, alkyl imidazoline inhibiter, stirring at normal temperature is even,
(2). add mineral alkali, neutralization, to pH=6～8, after adding, is mediated and is stirred 25～30 minutes under normal temperature in batches,
(3). be heated to 100～130 ℃, mediate stirring and be dried to moisture content 20%～30%,
(4). by screw extrusion press by material moulding, oven dry,
(5). zinc sulfate, Sodium hexametaphosphate 99 are added, be uniformly mixed 25～30 minutes and get product.
It is commercially available prod that described 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid is called for short HEDP, liquid, and effective constituent is in HEDP, content 40～60%, wherein preferably >=50.0%;
Described maleic acid-acrylic acid copolymer is commercially available prod, brown yellow transparent liquid, active constituent content 40～60%, wherein preferably >=45.0%;
Described alkyl imidazoline inhibiter is commercially available prod, weak yellow liquid, the mass content 30～60% of actives, wherein preferably >=50.0%, described actives is straight chained alkyl tetrahydroglyoxaline or branched-chain alkyl tetrahydroglyoxaline or cycloalkyl tetrahydroglyoxaline, or the mixture of one or two or more wherein, described straight chained alkyl tetrahydroglyoxaline comprises the wherein mixture of one or two or more of lauryl imidazoline, hexadecyl tetrahydroglyoxaline, tetradecyl tetrahydroglyoxaline, octadecyl tetrahydroglyoxaline
Described zinc sulfate is Industrial products, is Zincomed, Zinc Sulphate Monohydrate, Zinc Sulphate Heptahydrate, the mixture of one or two or more wherein, and its consumption is according to the mass metrology that is converted to Zincomed;
Described mineral alkali is the wherein mixture of one or two or more of sodium hydroxide, aqueous sodium hydroxide solution, sodium carbonate, sodium bicarbonate, and its consumption is according to being converted to the mass metrology of sodium hydroxide with mole numbers such as sodium hydroxide.
Embodiment 2, and a kind of oil field reinjection water special solid corrosion inhibiting and descaling agent, is the raw material by following weight percent, the product that uses following preparation method to make:
The preparation method of oil field reinjection water solid corrosion and scale inhibitor comprises the following steps:
(1). in kneader, add 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid to be called for short HEDP, maleic acid-acrylic acid copolymer, alkyl imidazoline inhibiter, stirring at normal temperature is even,
(2). add mineral alkali, neutralization, to pH=6～8, after adding, is mediated and is stirred 25～30 minutes under normal temperature in batches,
(3). by screw extrusion press, by material moulding, dry,
(4). zinc sulfate, Sodium hexametaphosphate 99 are added, be uniformly mixed 25～30 minutes and get product.
The specification requirement of the raw material that the present embodiment is used is with embodiment 1.
Claims (3)
1. an oil field reinjection water special solid corrosion inhibiting and descaling agent, is characterized in that: be the raw material by following weight percent, and the product that uses following preparation method to make:
The preparation method of oil field reinjection water solid corrosion and scale inhibitor comprises the following steps:
(1). in kneader, add 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid to be called for short HEDP, maleic acid-acrylic acid copolymer, alkyl imidazoline inhibiter, stirring at normal temperature is even,
(2). add mineral alkali, neutralization, to pH=6～8, after adding, is mediated and is stirred 25～30 minutes under normal temperature in batches,
(3). be heated to 100～130 ℃, mediate stirring and be dried to moisture content 20%～30%,
(4). by screw extrusion press by material moulding, oven dry,
(5). zinc sulfate, Sodium hexametaphosphate 99 are added, be uniformly mixed 25～30 minutes and get product.
2. a kind of oil field reinjection water solid corrosion and scale inhibitor according to claim 1, is characterized in that: it is commercially available prod that described 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid is called for short HEDP, liquid, and effective constituent is in HEDP, content 40～60%, wherein preferably >=50.0%;
Described maleic acid-acrylic acid copolymer is commercially available prod, brown yellow transparent liquid, active constituent content 40～60%, wherein preferably >=45.0%;
Described alkyl imidazoline inhibiter is commercially available prod, weak yellow liquid, the mass content 30～60% of actives, wherein preferably >=50.0%, described actives is straight chained alkyl tetrahydroglyoxaline or branched-chain alkyl tetrahydroglyoxaline or cycloalkyl tetrahydroglyoxaline, or the mixture of one or two or more wherein, described straight chained alkyl tetrahydroglyoxaline comprises the wherein mixture of one or two or more of lauryl imidazoline, tetradecyl tetrahydroglyoxaline, hexadecyl tetrahydroglyoxaline, octadecyl tetrahydroglyoxaline;
Described zinc sulfate is Industrial products, is Zincomed, Zinc Sulphate Monohydrate, Zinc Sulphate Heptahydrate, the mixture of one or two or more wherein, and its consumption is according to the mass metrology that is converted to Zincomed;
Described mineral alkali is the wherein mixture of one or two or more of sodium hydroxide, aqueous sodium hydroxide solution, sodium carbonate, sodium bicarbonate, and its consumption is according to being converted to the mass metrology of sodium hydroxide with mole numbers such as sodium hydroxide.
3. a kind of oil field reinjection water solid corrosion and scale inhibitor according to claim 1 is characterized in that: described preparation method, described in step (3), be heated to 100～130 ℃, mediate stirring and be dried to moisture content 20%～30%, or according to forcing machine needs, omit this step.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104230016A (en) * | 2014-09-07 | 2014-12-24 | 无棣华信石油技术服务有限公司 | Oilfield reinjection water scale inhibitor and preparation method thereof |
| CN104445648A (en) * | 2014-11-14 | 2015-03-25 | 天津大港油田滨港集团博弘石油化工有限公司 | Corrosion and scale inhibitor for oilfield water injection treatment |
| CN104479658A (en) * | 2014-11-25 | 2015-04-01 | 苏州佑君环境科技有限公司 | Solid scale prevention and removal agent and preparation method thereof |
| CN104609577A (en) * | 2014-12-25 | 2015-05-13 | 宁波市川宁环保科技有限公司 | Efficient composite bactericidal scale inhibitor and preparation method thereof |
| CN105936552A (en) * | 2016-06-20 | 2016-09-14 | 延长油田股份有限公司 | Solid corrosion and scale inhibitor for oil field and preparation method thereof |
| CN111073618A (en) * | 2020-01-03 | 2020-04-28 | 陕西日新石油化工有限公司 | Solid corrosion inhibitor capable of being released uniformly and preparation method thereof |
| CN112010435A (en) * | 2019-05-30 | 2020-12-01 | 池州万维化工有限公司 | Processing technology of all-organic corrosion and scale inhibition industrial water treatment agent |
| CN115614002A (en) * | 2021-07-13 | 2023-01-17 | 中国石油天然气股份有限公司 | Self-controlled slow-release device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104230016A (en) * | 2014-09-07 | 2014-12-24 | 无棣华信石油技术服务有限公司 | Oilfield reinjection water scale inhibitor and preparation method thereof |
| CN104445648A (en) * | 2014-11-14 | 2015-03-25 | 天津大港油田滨港集团博弘石油化工有限公司 | Corrosion and scale inhibitor for oilfield water injection treatment |
| CN104479658A (en) * | 2014-11-25 | 2015-04-01 | 苏州佑君环境科技有限公司 | Solid scale prevention and removal agent and preparation method thereof |
| CN104609577A (en) * | 2014-12-25 | 2015-05-13 | 宁波市川宁环保科技有限公司 | Efficient composite bactericidal scale inhibitor and preparation method thereof |
| CN105936552A (en) * | 2016-06-20 | 2016-09-14 | 延长油田股份有限公司 | Solid corrosion and scale inhibitor for oil field and preparation method thereof |
| CN112010435A (en) * | 2019-05-30 | 2020-12-01 | 池州万维化工有限公司 | Processing technology of all-organic corrosion and scale inhibition industrial water treatment agent |
| CN111073618A (en) * | 2020-01-03 | 2020-04-28 | 陕西日新石油化工有限公司 | Solid corrosion inhibitor capable of being released uniformly and preparation method thereof |
| CN115614002A (en) * | 2021-07-13 | 2023-01-17 | 中国石油天然气股份有限公司 | Self-controlled slow-release device |
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| CN103708629B (en) | 2016-01-13 |
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Address after: 250400, Shandong County, Ji'nan province Pingyin County Industrial Park East Patentee after: SHANDONG HUAYOU WATER PROCESSING TECHNOLOGY CO.,LTD. Address before: 250400, Shandong County, Ji'nan province Pingyin County Industrial Park East Patentee before: Shandong Huayou Chemical Co.,Ltd. |
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Denomination of invention: Special solid corrosion and scale inhibitor for oilfield reinjection water Effective date of registration: 20170704 Granted publication date: 20160113 Pledgee: Qilu bank Limited by Share Ltd. Ji'nan Pingyin branch Pledgor: SHANDONG HUAYOU WATER PROCESSING TECHNOLOGY CO.,LTD. Registration number: 2017370000082 |
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Date of cancellation: 20230811 Granted publication date: 20160113 Pledgee: Qilu bank Limited by Share Ltd. Ji'nan Pingyin branch Pledgor: SHANDONG HUAYOU WATER PROCESSING TECHNOLOGY CO.,LTD. Registration number: 2017370000082 |