CN102174315B - Scale removing and preventing agent for oil well in later period of tertiary oil recovery - Google Patents

Scale removing and preventing agent for oil well in later period of tertiary oil recovery Download PDF

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CN102174315B
CN102174315B CN 201110057778 CN201110057778A CN102174315B CN 102174315 B CN102174315 B CN 102174315B CN 201110057778 CN201110057778 CN 201110057778 CN 201110057778 A CN201110057778 A CN 201110057778A CN 102174315 B CN102174315 B CN 102174315B
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oil well
later stage
industrial goods
oil recovery
tertiary
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CN102174315A (en
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付亚荣
刘春平
秦岭
李冬青
李造吉
付丽霞
李淼
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Petrochina Co Ltd
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Petrochina Co Ltd
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Abstract

The scale removing and preventing agent for oil well in the later stage of tertiary oil recovery is used in removing and preventing scale in oil well in the later stage of tertiary oil recovery. Is characterized in that: the weight percentages of the components are as follows: hydroxypentamethylenephosphonic acid: 15.2-17.8%; hydrochloric acid: 3.5-4.0%; hydrofluoric acid: 3.0-3.2%; vitamin C: 0.05-0.06%; phosphino polymaleic anhydride antiscalant: 21.5-24%; urotropin: 2.5-3.0%; USP2 alkyl is pentadecyl: 5.7-6.2%; c12-C18Fatty alcohol polyoxyethylene (10) ether: 2.5-3.0%; a sodium selenide aqueous solution with a concentration of 0.3-0.5%: 0.001-0.0015%; methanol: 15-20%; the balance of water; the sum of the weight percentages of the components is 100 percent. The effect is as follows: when the oil well is daily maintained, the scale deposit of the oil well can be removed or slowed down and the detection can be prolonged by adding the oil well in the later stage of tertiary oil recoveryAnd (4) pump cycle. The produced liquid is added into 50-75 mg of oil well annulus in each liter of produced liquid, and the pump inspection period of the oil well can be prolonged by 1-2 times.

Description

A kind of tertiary oil recovery later stage oil well cleaning antiscale
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 deeply implemented to expose the problem of oil well fouling along with tertiary oil recovery technology, 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 clastic quitz, 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, such as disodium EDTA (EDTA), CDTA salt (DCTA), ethylenediamine tetrapropionic acid(EDTP) salt (EDTP) etc.This class sequestrant is low molecular compound, and Chelate stability constants is large, can be used for comparatively high temps, but because consumption is large, and cost is high, its application is restricted.Phosphorus compound class scale inhibitor mostly is the organic multicomponent phosphonic acids.Such 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, calcium carbonate is had the 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 calcium 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, 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 the people such as Fu Jian write is published in the 57th~58 page of the 1st phase in 2004 " 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 the people such as Yang Li write is published in the 137th~140 page of the 2nd phase in 1998 " 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-(2,3-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: for pale yellow oily liquid body or mashed prod, soluble in water.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, the hydrolysis and make solution be alkalescence.Behind the dissolving amorphous selenium, can form many sodium selenides (such as Na in its solution of base 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 to add 5% of entry, slowly is warmed up to 45~50 ℃, stirs 30 minutes; Adding in proportion successively the USP2 alkyl again is pentadecyl, urotropine, hydrochloric acid, hydrofluoric acid, stirs while adding, and then, adds in proportion concentration 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, and stopped heating stirs while cooling off, and is cooled to normal temperature, obtains 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 Produced Liquid of every extraction, 1~2 times of energy Extended 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 to add 5% of entry, slowly is warmed up to 45~50 ℃, stirs 30 minutes; Adding in proportion successively the USP2 alkyl again is pentadecyl, urotropine, hydrochloric acid, hydrofluoric acid, stirs while adding, and then, adds in proportion sodium selenide, vitamins C, methyl alcohol, stirs after 30 minutes; At last; The water of adding remainder also stirred 30 minutes, and stopped heating stirs while cooling off, and is cooled to normal temperature, obtains tertiary oil recovery later stage oil well cleaning antiscale.
Effect: add oil well annular space 65mg with one liter of Produced Liquid of every extraction, 1.2 times of energy Extended 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 Produced Liquid of every extraction, 1.2 times of energy Extended 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 Produced Liquid of every extraction, 1.8 times of energy Extended 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 Produced Liquid of every extraction, 1.5 times of energy Extended 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 Produced Liquid of every extraction, 1.7 times of energy Extended 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 USP3 alkyl is 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 to add 5% of entry, slowly is warmed up to 45~50 ℃, stirs 30 minutes; Adding in proportion successively the USP3 alkyl again is pentadecyl, urotropine, hydrochloric acid, hydrofluoric acid, stirs while adding, and then, adds in proportion concentration 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, and stopped heating stirs while cooling off, and is cooled to normal temperature, obtains tertiary oil recovery later stage oil well cleaning antiscale.
CN 201110057778 2011-03-10 2011-03-10 Scale removing and preventing agent for oil well in later period of tertiary oil recovery Active CN102174315B (en)

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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
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 Corrosion and scale inhibitor and preparation method thereof

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CN101798502B (en) * 2010-04-09 2012-12-12 中国石油天然气股份有限公司 Scale inhibitor for preventing deposition of barium and strontium scales

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108913112A (en) * 2018-08-10 2018-11-30 宁夏朔光石油科技有限公司 Cleaning antiscale and preparation method thereof

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