CN102174315A - Scale removing and inhibiting agent for later-stage oil well with tertiary oil recovery - Google Patents
Scale removing and inhibiting agent for later-stage oil well with tertiary oil recovery Download PDFInfo
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- CN102174315A CN102174315A CN2011100577782A CN201110057778A CN102174315A CN 102174315 A CN102174315 A CN 102174315A CN 2011100577782 A CN2011100577782 A CN 2011100577782A CN 201110057778 A CN201110057778 A CN 201110057778A CN 102174315 A CN102174315 A CN 102174315A
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Abstract
The invention relate to a scale removing and inhibiting agent for a later-stage oil well with tertiary oil recovery, which is used for removing and inhibiting the scale of the later-stage oil well with tertiary oil recovery and is characterized by comprising the following components in percentage by weight: 15.2-17.8% of hydroxy pentamethylene phosphonic acid, 3.5-4.0% of hydrochloric acid, 3.0-3.2% of hydrofluoric acid, 0.05-0.06% of vitamin C, 21.5-24% of phosphino polymaleic anhydride scale inhibitor, 2.5-3.0% of methenamine, 5.7-6.2% of USP2 with a pentadecyl, 2.5-3.0% of C12-C18 fatty alcohol polyoxyethylene (10) ether, 0. 001-0.0015% of 0.3-0.5% aqueous solution of sodium selenide, 15-20% of methanol and the balance of water, wherein all the components account for 100 percent by weight. The scale removing and inhibiting agent can be added to the later-stage oil well with tertiary oil recovery during the daily maintenance of the oil well to remove or slow down the oil well scale deposition and prolong the pump detection period, 50-75mg of scale removing and inhibiting agent is added to the oil well annulus for the recovery of 1 litter of oil from the oil well, and the pump detection period can be prolonged by 1-2 times.
Description
Technical field
The invention belongs to the petroleum recovering technical field, relate in particular to a kind of tertiary oil recovery later stage oil well cleaning antiscale, is a kind of oil well dirt deposition after the tertiary oil recovery of removing or slow down, and simultaneously steel is had the galvanic protection effect, prolongs the oil well cleaning antiscale of pump detection period.
Background technology
Tertiary oil recovery technology is the important means that the oil field late high water content period further improves recovery ratio.But along with tertiary oil recovery technology has deeply implemented to expose the problem of oil well fouling, the oil well fouling can have a strong impact on normal oil recovery production.Essential mineral composition in the oil well dirt is amorphous silica, the spherical calcite of six sides, common calcite and barium sulfate etc.; Less important mineral are chip quartz, chip feldspar, detrital clay particle and pyrite etc.; In addition, also has a small amount of trace quantity mineral.The oil well scale problems has become the biggest obstacle of implementing tertiary oil recovery technology after the tertiary oil recovery.
At present, the chemical scale inhibition agent roughly is divided three classes: i.e. aminopolycanboxylic acid's salt, phosphorus compound class and organic polymer class.Aminopolycanboxylic acid's salt is the low molecule sequestrant of a class, as disodium EDTA (EDTA), CDTA salt (DCTA), ethylenediamine tetrapropionic acid(EDTP) salt (EDTP) etc.This class sequestrant is a low molecular compound, and the chelating stability constant is big, can be used for comparatively high temps, but because consumption is big, the cost height, its application is restricted.Phosphorus compound class scale inhibitor mostly is the organic multicomponent phosphonic acids.As the ethylene diamine tetra methylene phosphonic acid (EDTMP) of methylenephosphonic acid type, with the 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP) of carbon diphosphine acid type, 4 of carboxy phosphonic acid type, 4-'-diphosphono-1,7-pimelic acid etc.Organic multicomponent phosphonic acid based scale inhibitor have consumption little, can bear comparatively high temps, lime carbonate is had higher advantages such as antiscale efficient, more in field use, relatively poor to the antiscaling effect of barium sulfate, Strontium Sulphate.The organic polymer scale inhibitor mainly is polymaleic anhydride and polyacrylic acid and their multipolymer.The antiscale mechanism of this base polymer be on the polymer molecular chain carboxyl can with the polyvalent metal ion complexing, the complexing of a plurality of carboxyls then forms inner complex and has anti-scaling property.This base polymer is to the too late organic multicomponent phosphonic acids of the antiscale efficient of lime carbonate, calcium sulfate, though barium sulfate, Strontium Sulphate are had antiscaling effect, efficient is lower.
Summary of the invention
The objective of the invention is: a kind of tertiary oil recovery later stage oil well cleaning antiscale is provided, when the oil well routine maintenance, adds tertiary oil recovery later stage oil well, can remove or slow down the oil well dirt deposition, prolong pump detection period.
The technical solution used in the present invention is:
One, the raw material and the prescription of tertiary oil recovery later stage oil well cleaning antiscale:
Raw material comprises:
1, hydroxyl five methylenephosphonic acids (industrial goods), " Gudao oilfield ternary composite driving fouling Analysis on Mechanism and the preventing fouling " that people such as Fu Jian write is published in the 57th～58 page of 2004 the 1st phase " Xi'an Petroleum University's journal (natural science edition) ".
2, hydrochloric acid (HCl);
3, hydrofluoric acid (HF);
4, vitamins C (industrial goods); It is a kind of water miscible strong antioxidant.
5, phosphino-polymaleic anhydride scale inhibitor (industrial goods), " the phosphino-polymaleic anhydride scale inhibitor " that people such as Yang Li write is published in the 137th～140 page of 1998 the 2nd phase " oilfield chemistry ".
Manufacturer: Sweet natural gas research institute of Southwest Oil company.
6, urotropine (industrial goods);
7, the USP2 alkyl is pentadecyl (industrial goods), another name chlorination-1-(2, the 3-dihydroxypropyl)-1-(2-sulphur is urinated basic ethyl)-2-pentadecyl tetrahydroglyoxaline phosphoric acid ester sodium.
Huang Hongzhou edits Chinese tensio-active agent overview one book, the 556th page of Chemical Industry Press.
Purposes: contain S, P amphoteric imidazoline inhibiter.
Manufacturer: department of chemistry of Qingdao Marine University.
8, C
12-C
18Aliphatic alcohol polyethenoxy (10) ether (industrial goods).Huang Hongzhou edits Chinese tensio-active agent overview one book, the 327th page of Chemical Industry Press.
Character:, soluble in water for pale yellow oily liquid body or mashed prod.Emulsification, washing, wettability are good.
Purposes: as the emulsifying agent of fiber sprinning finish, preparation family expenses, industrial detergent and metal cleaner.
Manufacturer: Xingtai area auxiliary reagent factory, auxiliary reagent factory, Shenyang, the machine chemical plant in Dalian second, Dalian Allied Chemical Corporation.
9, sodium selenide; Chemical formula: Na
2S
e, molecular weight: 124.94.Colorless solid.Easy deliquescence.Density: 2.625 (10 ℃).Fusing point is greater than 875 ℃.Be insoluble to liquefied ammonia, soluble in water, hydrolysis and make solution be alkalescence.Behind the dissolving amorphous selenium, can form many sodium selenides in its solution of base (as Na
2Se
2, Na
2Se
3, Na
2Se
4Deng).
10, methyl alcohol (industrial goods);
11, water.
Each weight percentages of components of tertiary oil recovery later stage oil well cleaning antiscale is:
1, hydroxyl five methylenephosphonic acids (industrial goods): 15.2～17.8%;
2, hydrochloric acid HCl (industrial goods): 3.5～4.0%;
3, hydrofluoric acid HF (industrial goods): 3.0～3.2%;
4, vitamins C (industrial goods): 0.05～0.06%;
5, phosphino-polymaleic anhydride scale inhibitor: 21.5～24%;
6, urotropine (industrial goods): 2.5～3.0%;
7, the USP2 alkyl is pentadecyl (industrial goods): 5.7～6.2%;
8, C
12-C
18Aliphatic alcohol polyethenoxy (10) ether (industrial goods): 2.5～3.0%
9, concentration is 0.3～0.5% the sodium selenide aqueous solution: 0.001～0.0015%;
10, methyl alcohol (industrial goods): 15～20%;
11, all the other are water; Each weight percentages of components sum is 100%.
Two, the preparation method of tertiary oil recovery later stage oil well cleaning antiscale
Major equipment:
Enamel reaction still with 2000L of stirring, heating, cooling and vacuum system.
Production method:
At first, with hydroxyl five methylenephosphonic acids, phosphino-polymaleic anhydride scale inhibitor, C
12-C
18Aliphatic alcohol polyethenoxy (10) ether adds in the enamel reaction still in proportion; Secondly, adding need add 5% of entry, slowly is warmed up to 45～50 ℃, stirs 30 minutes; Adding the USP2 alkyl successively in proportion again is pentadecyl, urotropine, hydrochloric acid, hydrofluoric acid, stirs while adding, and then, adds concentration in proportion and be 0.3～0.5% the sodium selenide aqueous solution, vitamins C, methyl alcohol, stirs after 30 minutes; At last; The water of adding remainder also stirred 30 minutes, stopped heating, stirred while cooling off, and was cooled to normal temperature, obtained tertiary oil recovery later stage oil well cleaning antiscale.Contained water is not counted in the sodium selenide aqueous solution needs to add in the water yield.
The invention has the beneficial effects as follows: tertiary oil recovery later stage oil well cleaning antiscale, when the oil well routine maintenance, add in the tertiary oil recovery later stage oil well, can remove or slow down the oil well dirt deposition, prolong pump detection period.Add oil well annular space 50～75mg with one liter of extraction liquid of every extraction, can prolong 1～2 times of oil well pump detection period.
Embodiment
Embodiment 1: each weight percentages of components of tertiary oil recovery later stage oil well cleaning antiscale is:
1, hydroxyl five methylenephosphonic acids (industrial goods): 15.3%;
2, hydrochloric acid HCl (industrial goods): 3.5%;
3, hydrofluoric acid HF (industrial goods): 3.2%;
4, vitamins C (industrial goods): 0.05%;
5, phosphino-polymaleic anhydride scale inhibitor: 24%;
6, urotropine (industrial goods): 2.5%;
7, the USP2 alkyl is pentadecyl (industrial goods): 5.7%;
8, C
12-C
18Aliphatic alcohol polyethenoxy (10) ether (industrial goods): 2.5%
9, concentration is 0.5% the sodium selenide aqueous solution: 0.001%;
10, methyl alcohol (industrial goods): 15%;
11, water: 28.249%.
Production method: at first, with hydroxyl five methylenephosphonic acids, phosphino-polymaleic anhydride scale inhibitor, C
12-C
18Aliphatic alcohol polyethenoxy (10) ether adds in the enamel reaction still in proportion; Secondly, adding need add 5% of entry, slowly is warmed up to 45～50 ℃, stirs 30 minutes; Adding the USP2 alkyl successively in proportion again is pentadecyl, urotropine, hydrochloric acid, hydrofluoric acid, stirs while adding, and then, adds sodium selenide, vitamins C, methyl alcohol in proportion, stirs after 30 minutes; At last; The water of adding remainder also stirred 30 minutes, stopped heating, stirred while cooling off, and was cooled to normal temperature, obtained tertiary oil recovery later stage oil well cleaning antiscale.
Effect: add oil well annular space 65mg with one liter of extraction liquid of every extraction, can prolong 1.2 times of oil well pump detection periods.
Embodiment: 2: each weight percentages of components of tertiary oil recovery later stage oil well cleaning antiscale is:
1, hydroxyl five methylenephosphonic acids (industrial goods): 15.8%;
2, hydrochloric acid HCl (industrial goods): 3.6%;
3, hydrofluoric acid HF (industrial goods): 3.15%;
4, vitamins C (industrial goods): 0.052%;
5, phosphino-polymaleic anhydride scale inhibitor: 23.5%;
6, urotropine (industrial goods): 2.6%;
7, the USP2 alkyl is pentadecyl (industrial goods): 5.9%;
8, C
12-C
18Aliphatic alcohol polyethenoxy (10) ether (industrial goods): 2.6%
9, concentration is 0.5% the sodium selenide aqueous solution: 0.0012%;
10, methyl alcohol (industrial goods): 16%;
11, water: 26.7968%.
The preparation method is identical with embodiment 1.Effect: add oil well annular space 60mg with one liter of extraction liquid of every extraction, can prolong 1.2 times of oil well pump detection periods.
Embodiment 3: each weight percentages of components of tertiary oil recovery later stage oil well cleaning antiscale is:
1, hydroxyl five methylenephosphonic acids (industrial goods): 16.3%;
2, hydrochloric acid HCl (industrial goods): 3.7%;
3, hydrofluoric acid HF (industrial goods): 3.12%;
4, vitamins C (industrial goods): 0.055%;
5, phosphino-polymaleic anhydride scale inhibitor: 22.7%;
6, urotropine (industrial goods): 2.7%;
7, the USP2 alkyl is pentadecyl (industrial goods): 6%;
8, C
12-C
18Aliphatic alcohol polyethenoxy (10) ether (industrial goods): 2.7%
9, concentration is 0.4% the sodium selenide aqueous solution: 0.0013%;
10, methyl alcohol (industrial goods): 17%;
11, water is 26.7237%.
The preparation method is identical with embodiment 1.Effect: add oil well annular space 75mg with one liter of extraction liquid of every extraction, can prolong 1.8 times of oil well pump detection periods.
Embodiment 4: each weight percentages of components of tertiary oil recovery later stage oil well cleaning antiscale is:
1, hydroxyl five methylenephosphonic acids (industrial goods): 17%;
2, hydrochloric acid HCl (industrial goods): 3.9%;
3, hydrofluoric acid HF (industrial goods): 3.1%;
4, vitamins C (industrial goods): 0.058%;
5, phosphino-polymaleic anhydride scale inhibitor: 22%;
6, urotropine (industrial goods): 2.8%;
7, the USP2 alkyl is pentadecyl (industrial goods): 6.1%;
8, C
12-C
18Aliphatic alcohol polyethenoxy (10) ether (industrial goods): 2.8%
9, concentration is 0.5% the sodium selenide aqueous solution: 0.0014%;
10, methyl alcohol (industrial goods): 18%;
11, water is 24.2406%.
The preparation method is identical with embodiment 1.Effect: add oil well annular space 55mg with one liter of extraction liquid of every extraction, can prolong 1.5 times of oil well pump detection periods.
Embodiment 5: each weight percentages of components of tertiary oil recovery later stage oil well cleaning antiscale is:
1, hydroxyl five methylenephosphonic acids (industrial goods): 17.8%;
2, hydrochloric acid HCl (industrial goods): 4%;
3, hydrofluoric acid HF (industrial goods): 3%;
4, vitamins C (industrial goods): 0.06%;
5, phosphino-polymaleic anhydride scale inhibitor: 21.5%;
6, urotropine (industrial goods): 3%;
7, the USP2 alkyl is pentadecyl (industrial goods): 6.2%;
8, C
12-C
18Aliphatic alcohol polyethenoxy (10) ether (industrial goods): 3%
9, concentration is 0.5% the sodium selenide aqueous solution: 0.0015%;
10, methyl alcohol (industrial goods): 20%;
11, water is 21.4385%.
The preparation method is identical with embodiment 1.Effect: add oil well annular space 75mg with one liter of extraction liquid of every extraction, can prolong 1.7 times of oil well pump detection periods.
Claims (2)
1. tertiary oil recovery later stage oil well cleaning antiscale is characterized in that each weight percentages of components is:
Hydroxyl five methylenephosphonic acids: 15.2～17.8%;
Hydrochloric acid (HCl): 3.5～4.0%;
Hydrofluoric acid (HF): 3.0～3.2%;
Vitamins C: 0.05～0.06%;
Phosphino-polymaleic anhydride scale inhibitor: 21.5～24%;
Urotropine: 2.5～3.0%;
The USP2 alkyl is a pentadecyl: 5.7～6.2%;
C
12-C
18Aliphatic alcohol polyethenoxy (10) ether: 2.5～3.0%;
Concentration is 0.3～0.5% the sodium selenide aqueous solution: 0.001～0.0015%;
Methyl alcohol: 15～20%;
All the other are water; Each weight percentages of components sum is 100%.
2. tertiary oil recovery later stage oil well cleaning antiscale as claimed in claim 1 is characterized in that production method is:
At first, with hydroxyl five methylenephosphonic acids, phosphino-polymaleic anhydride scale inhibitor, C
12-C
18Aliphatic alcohol polyethenoxy (10) ether adds in the enamel reaction still in proportion; Secondly, adding need add 5% of entry, slowly is warmed up to 45～50 ℃, stirs 30 minutes; Adding the USP2 alkyl successively in proportion again is pentadecyl, urotropine, hydrochloric acid, hydrofluoric acid, stirs while adding, and then, adds concentration in proportion and be 0.3～0.5% the sodium selenide aqueous solution, vitamins C, methyl alcohol, stirs after 30 minutes; At last; The water of adding remainder also stirred 30 minutes, stopped heating, stirred while cooling off, and was cooled to normal temperature, obtained tertiary oil recovery later stage oil well cleaning antiscale.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104059624A (en) * | 2014-06-26 | 2014-09-24 | 西南石油大学 | Acid solution system capable of relieving damage of mud to low-permeability reservoir |
| CN104327816A (en) * | 2014-11-05 | 2015-02-04 | 青岛蓬勃石油技术服务有限公司 | Clearing liquid for removing blockage of drilling fluid weighting agent and preparation method of clearing liquid |
| CN104962266A (en) * | 2015-06-17 | 2015-10-07 | 成都高普石油工程技术有限公司 | Oil well cleaning scale inhibitor |
| CN106190073A (en) * | 2016-07-05 | 2016-12-07 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of hypotonic complicated fouling reservoir multi-functional cleaning antiscale formula and preparation method |
| CN106609133A (en) * | 2016-04-07 | 2017-05-03 | 陕西长兴石油科技有限公司 | Multi-system long-time antiscale agent for oil well |
| CN109837544A (en) * | 2017-11-24 | 2019-06-04 | 中国石油天然气股份有限公司 | A kind of corrosion inhibiting and descaling agent and preparation method thereof |
Families Citing this family (1)
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| CN108913112B (en) * | 2018-08-10 | 2019-06-14 | 宁夏朔光石油科技有限公司 | Cleaning antiscale and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104059624A (en) * | 2014-06-26 | 2014-09-24 | 西南石油大学 | Acid solution system capable of relieving damage of mud to low-permeability reservoir |
| CN104327816A (en) * | 2014-11-05 | 2015-02-04 | 青岛蓬勃石油技术服务有限公司 | Clearing liquid for removing blockage of drilling fluid weighting agent and preparation method of clearing liquid |
| CN104962266A (en) * | 2015-06-17 | 2015-10-07 | 成都高普石油工程技术有限公司 | Oil well cleaning scale inhibitor |
| CN106609133A (en) * | 2016-04-07 | 2017-05-03 | 陕西长兴石油科技有限公司 | Multi-system long-time antiscale agent for oil well |
| CN106190073A (en) * | 2016-07-05 | 2016-12-07 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of hypotonic complicated fouling reservoir multi-functional cleaning antiscale formula and preparation method |
| CN106190073B (en) * | 2016-07-05 | 2018-11-13 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | The multi-functional cleaning antiscale formula of the hypotonic complexity fouling reservoir of one kind and preparation method |
| CN109837544A (en) * | 2017-11-24 | 2019-06-04 | 中国石油天然气股份有限公司 | A kind of corrosion inhibiting and descaling agent and preparation method thereof |
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