CN104194755A - Superstrong pincerlike scale dissolving liquid - Google Patents
Superstrong pincerlike scale dissolving liquid Download PDFInfo
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- CN104194755A CN104194755A CN201410384429.5A CN201410384429A CN104194755A CN 104194755 A CN104194755 A CN 104194755A CN 201410384429 A CN201410384429 A CN 201410384429A CN 104194755 A CN104194755 A CN 104194755A
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- dirty
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/528—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning inorganic depositions, e.g. sulfates or carbonates
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Abstract
The invention relates to a superstrong pincerlike scale dissolving liquid which is prepared from the following components in percentage by weight: 18-22% of citric acid, 3-8% of sulfuric acid, 8-12% of potassium dichromate, 3-8% of ferrous sulfate, 8-12% of urotropin and the balance of solvent water. The superstrong pincerlike scale dissolving liquid provided by the invention can be used for effectively dissolving compound scales generated in a three compound combination flooding process to separate scale crystals, solving the problem of holddown of an injection-production system and scale formation of immediate vicinity of a wellbore, increasing the capacity of the oil well, prolonging the operating period and lowering the production cost per ton. Moreover, the superstrong pincerlike scale dissolving liquid has a good corrosion inhibiting effect to the injection-production system such as pipelines, sleeves and pumps.
Description
Technical field:
The present invention relates to oil extraction in oil field technical field a kind of chemical assistant used, particularly the molten dirty liquid of a kind of superpower pincer.
Background technology:
Along with the carrying out of ternary composite driving performance history, at injection and extraction system and immediate vicinity of wellbore, stratum, there is more serious scale formation, had a strong impact on normal production.And ternary drives the compound dirt that tied dirt is generally ceramics shape, silicate scale and carbonate scale skin also wrap up one deck organic substance.This compound dirty chemical constitution and forming process and boiler scale, water pipe dirt etc. have difference in essence.Ternary compound oil drive block, if contain barium in stratum, strontium mineral, under the effect of aqueous alkali in ternary liquid (pH value is greater than 13), when the pH value of Produced Liquid is greater than 10, in Produced Liquid, contain the positively charged ion that can become dirty and comprise barium ion, strontium ion, calcium ion, magnesium ion, negatively charged ion comprises hydro-polyacrylamide, carbanion, silicate ion, these the moon, positively charged ion is in the immediate vicinity of wellbore enrichment of extraction well, while is due to the sudden outburst of hydrodynamicpressure, on immediate vicinity of wellbore and sleeve pipe more than perforation position, will form a kind of dirt, it is compound dirt, in compound dirt, contain barium silicate strontium, miemite and polyacrylamide, the harm of this dirt is very serious, can significantly reduce oilwell produced fluid amount, reduce production capacity, cause frequent holddown simultaneously, pump detection period significantly shortens, seriously increased produce oil cost.And the general acid unblocking agent using on oil field is difficult to be dissolved, remove.
Current existing scale remover, patent of invention (patent No. 02129693) be take scale inhibition as main, patent of invention (patent No. 2011100577782) be take mineral dirt as main, the water-soluble dirty inhibiter of scale-dissolving agent < < oil and water well carbonate scale remover > > patent of invention (CN201110315256.8) and < < industrial cycle and preparation method > > patent of invention (CN201210237781.7) all can not be dissolved the effective constituent of organic substance in compound dirt.
Summary of the invention:
In order to solve the problem existing in background technology.The present invention proposes the molten dirty liquid of a kind of superpower pincer.The present invention is directed to the compound dirt producing in mechanical recovery during ASP flooding, can effectively dissolve, separated dirt is brilliant, solves injection and extraction system holddown and immediate vicinity of wellbore scale problems, increases oil well productivity and extends working cycle, reduces the oily production cost of ton; And the present invention has good corrosion mitigating effect to injection and extraction systems such as pipeline, sleeve pipe, pumps.
Technical scheme of the present invention is: the molten dirty liquid of this superpower pincer comprises following component, each component by mass percentage: 18-22% citric acid, 3-8% sulfuric acid, 8-12% potassium bichromate, 3-8% ferrous sulfate, 8-12% urotropine, surplus is aqueous solvent.
20% citric acid in such scheme, 5% sulfuric acid, 10% potassium bichromate, 5% ferrous sulfate, 10% urotropine, surplus is aqueous solvent.
In such scheme citric acid and sulfuric acid composite be dirty solvating agent; After potassium bichromate and ferrous sulfate are composite, it is organic matter decomposition agent; Urotropine is inhibiter; First the present invention utilizes organic decomposition agent potassium bichromate and ferrous sulfate, thoroughly decomposes the organic substance polyacrylamide in dirt, makes dirt brilliant in naked state; Thereafter dirty solvating agent citric acid and sulfuric acid, dissolve the inorganics-dirty matter (carbonate scale and silicate scale) in compound dirt; Urotropine is inhibiter, can, in molten dirty process, effectively prevent the corrosion of the molten dirty liquid of superpower pincer to injection and extraction system.
The present invention has following beneficial effect: the present invention is directed to the compound dirt producing in mechanical recovery during ASP flooding, can effectively dissolve, separated dirt is brilliant, solves injection and extraction system holddown and immediate vicinity of wellbore scale problems, increase oil well productivity and extend working cycle, reducing the oily production cost of ton; And the present invention has good corrosion mitigating effect to injection and extraction systems such as pipeline, sleeve pipe, pumps.The molten dirty Du Keda that the molten dirty liquid of superpower pincer of invention drives compound dirt for ternary is more than 13%.Corrosion rate (40 ℃) <0.001mm/a.
Embodiment:
Below in conjunction with experiment, the present invention is further illustrated:
Following experiment is got the dirty sample of compound dirt of ternary composite driving piece oil well generation as the dirty sample of experiment.Prepare different molten dirty liquid, dirty sample is immersed in respectively in 100ml scale-dissolving agent, be placed in 45 ℃ of water-baths, after 48h, observe molten dirty effect.
(1) potassium bichromate and ferrous sulfate ratio optimization:
Prepare molten dirty liquid, each component by mass percentage: potassium bichromate 5-15%, ferrous sulfate 5%, citric acid 20%, sulfuric acid 5%, urotropine 10%, surplus is water, changes the proportioning of potassium bichromate and ferrous sulfate, observes molten dirty effect, as shown in table 1.
Table 1 potassium bichromate and ferrous sulfate dissolve the best proportioning of compound dirt
| Potassium bichromate: ferrous sulfate | Dirt sample original quality g | Dirty sample quality g after 48h | Dirty sample outward appearance after 48h |
| 1:1 | 10 | 2.67 | Be broken into several |
| 2:1 | 10 | 0 | All dissolve |
| 3:1 | 10 | 2.44 | Be broken into several |
As shown in Table 1: in dirty separating agent, potassium bichromate and the ferrous sulfate best proportioning when dissolving the compound dirt in Sanyuan District should be 2:1, and potassium bichromate concentration is 10%, and ferrous sulfate is 5%, ferrous sulfate dosage is too much or be very fewly all unfavorable for dirty dissolving.
(2) optimization of dirty solvating agent dosage:
Prepare molten dirty liquid, each component by mass percentage: potassium bichromate 10%, ferrous sulfate 5%, citric acid+sulfuric acid total content is 5-25%, urotropine 10%, surplus is water, changes the dosage of dirty solvating agent, observes molten dirty effect, as shown in table 2.
The dirty solvating agent of table 2 dissolves the optimum amount of compound dirt
As shown in Table 2: do not add dirty solvating agent, can not reach the effect of dissolving dirty sample, compound dirt can only be separated into several, along with the increase of dirty solvating agent dosage, the solute effect of dirty sample increases.When its dosage reaches 10%-20%, can reach best molten dirty effect.
(3) citric acid dosage is optimized:
Prepare molten dirty liquid, each component by mass percentage: potassium bichromate 10%, ferrous sulfate 5%, citric acid 10-25%, sulfuric acid 5%, urotropine 10%, surplus is water, changes the dosage of citric acid, observes molten dirty effect, as shown in table 3.
Optimum amount when table 3 citric acid dissolves compound dirt
As shown in Table 3, when citric acid dosage is 20%, can reach best molten dirty effect.
(4) sulfuric acid dosage is optimized:
Prepare molten dirty liquid, each component by mass percentage: potassium bichromate 10%, ferrous sulfate 5%, citric acid 20%, sulfuric acid 2-6%, urotropine 10%, surplus is water, changes the dosage of sulfuric acid, observes molten dirty effect, as shown in table 4.
Optimum amount during the compound dirt of table 4 sulfuric acid dissolution
| Sulfuric acid dosage % | Dirt sample original quality g | Dirty sample quality g after 48h | Dirty sample outward appearance after 48h |
| 0 | 10 | 2.56 | Remain a small amount of chip |
| 2 | 10 | 1.47 | Remain a small amount of chip |
| 4 | 10 | 1.09 | Remain a small amount of chip |
| 5 | 10 | 0 | All dissolve |
| 6 | 10 | 0 | All dissolve |
As shown in Table 4: sulfuric acid add the thorough dissolving that is conducive to dirty sample, when sulfuric acid dosage is 5%, can reach best molten dirty effect.
(5) urotropine dosage is optimized:
1) experimental technique
The N80 standard steel disc of getting smooth surface cleaning is (long: 7.232cm; Wide: 1.162; Thick: 0.208; Aperture: 0.400cm), clean and remove surface dirt with distilled water; With dehydrated alcohol, again clean steel disc, after cleaning, with infrared drying oven, dry; After the steel disc of drying is cooling, with its accurate weight of electronic balance weighing, steel disc weight G before record corrosion
1; After putting into the different molten dirty immersion bubble 48h of urotropine dosage, take out steel disc, after with distilled water and dehydrated alcohol, steel disc surface attachments being cleaned, in infrared drying oven, dry; After Drying and cooling, by its weight of electronic balance weighing, steel disc weight G after record corrosion
2;
Calculate the surface-area of steel disc, and calculate erosion rate, method of calculation are:
In formula: S-steel disc surface-area, cm
2;
L
1-steel disc length, cm;
L
2-steel disc is wide, cm;
H-steel plate thickness, cm;
Circularhole diameter in D-steel disc, cm;
Erosion rate V:
In formula: V-erosion rate, mm/a;
The list of k-adopt is constant, 87.6;
G
1steel disc weight before-corrosion, mg;
G
2steel disc weight after-corrosion, mg;
ρ-steel disc density, 7.86g/cm
3;
T-etching time, h;
S-steel disc surface-area, cm
2.
Corrosion inhibition rate R:
In formula: R-corrosion inhibition rate, %
V
0-do not add the erosion rate of urotropine steel disc, mm/a;
V
1-add the erosion rate of steel disc after urotropine, mm/a;
2) experimental result
Prepare molten dirty liquid, each component by mass percentage: potassium bichromate 10%, ferrous sulfate 5%, citric acid 20%, sulfuric acid 5%, urotropine 3-10%, surplus is water, change urotropine dosage, observe the corrosion mitigating effect of molten dirty liquid to N80 steel disc, as shown in table 5.
The impact of table 5 urotropine dosage on corrosion mitigating effect
As shown in Table 5: when the dosage of urotropine is 10% time, all have good corrosion mitigating effect.
The whole final proportioning of the molten dirty liquid of the above superpower pincer of the present invention, each component by mass percentage: potassium bichromate 10%, ferrous sulfate 5%, citric acid 20%, sulfuric acid 5%, urotropine 10%, surplus is water.This molten dirty liquid has the effect that good dissolving ternary is driven the compound dirt producing in process.And corrosion inhibition rate is higher.Can be for removing the operations such as immediate vicinity of wellbore obstruction, releasing pump clamp, decannulation dirt.
(6), the molten dirty liquid technical indicator of superpower pincer and laboratory test results:
1, technical target of the product: see the following form 6.
| Molten dirty degree (40 ℃) | 13g/100ml |
| PH value | <2 |
| Corrosion rate (40 ℃) | <0.001mm/a |
2, test method
(1) pH value is measured: with PH test paper, measure, actual pH value measurement result is: 1.5.
(2) corrosion rate is measured:
With reference to 3.1,3.2,3.3,3.5 in SY/T5237-2000 standard, 3.6,3.7,3.8 measure.
(3) molten dirty degree:
A: molten dirty degree: molten dirty degree is the quality that the molten dirty liquid of the superpower pincer of 100ml dissolves dirty sample, and unit is g/100ml.
Get the dirty sample of compound dirt of ternary displacement of reservoir oil well generation as the dirty sample of experiment.Prepare the molten dirty liquid of superpower pincer, 30g dirt sample is immersed in the molten dirty liquid of 100ml, be placed in 45 ℃ of water-baths, after 48hrs, insoluble dirty sample is taken out and dried, calculate molten dirty degree.Experimental result is as shown in table 7.
The molten dirty liquid of the superpower pincer of table 7 drives the molten dirty degree of compound dirt to ternary
| Dirt sample original quality g | The not molten dirty sample quality g of 48hrs | Molten dirty degree % |
| 30 | 16.43 | 13.57 |
The molten dirty Du Keda that the molten dirty liquid of superpower pincer of invention drives compound dirt for ternary is more than 13%.
B: the molten dirty effect of compound dirt.
Get ternary and drive the compound dirt that different oil wells produce, utilize the molten dirty liquid of superpower pincer of invention to carry out dissolution experiment.In 45 ℃ of water-baths, the different oil wells of 13g are got in the molten dirty liquid that dirty sample is immersed in 100ml, after 24h, observe the solute effect of dirty sample.Result is as shown in table 8.
The molten dirty liquid of the superpower pincer of table 8 drives the solute effect of dirty sample to ternary
| Date | Pound sign | Dirt sample type | Molten dirty result |
| 2014.05. | Outside X5-32-E20 pipe | Compound dirt | Dirt sample can thoroughly dissolve |
| 2014.05 | X6-22-E33 tail pipe | Compound dirt | Dirt sample can thoroughly dissolve |
| 2014.05 | X6-22-E33 pump | Compound dirt | Dirt sample can thoroughly dissolve |
| 2014.06 | Apricot 6-22-E28 | Compound dirt | Dirt sample can thoroughly dissolve |
| 2014.06 | Apricot 5-42-E17 | Compound dirt | Dirt sample can thoroughly dissolve |
In summary: the compound dirt that the molten dirty liquid of superpower pincer of invention drives generation to ternary has good solute effect.
Claims (2)
1. the molten dirty liquid of superpower pincer, comprises following component, each component by mass percentage: 18-22% citric acid, 3-8% sulfuric acid, 8-12% potassium bichromate, 3-8% ferrous sulfate, 8-12% urotropine, surplus is aqueous solvent.
2. the molten dirty liquid of superpower pincer according to claim 1, is characterized in that: 20% citric acid, and 5% sulfuric acid, 10% potassium bichromate, 5% ferrous sulfate, 10% urotropine, surplus is aqueous solvent.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107418544A (en) * | 2017-06-09 | 2017-12-01 | 天津亿利科能源科技发展股份有限公司 | A kind of water injection well in oil fields profile control that handles causes the composite drug and method of stifled well |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1415688A (en) * | 2002-10-31 | 2003-05-07 | 大庆油田有限责任公司 | Chemical blocking remover for water injection well in oil field |
| CN101928557A (en) * | 2010-07-06 | 2010-12-29 | 中国海洋石油总公司 | Unblocking agent for polymer gel profile control agent |
| CN102816559A (en) * | 2012-07-30 | 2012-12-12 | 大庆井升伟业油田技术服务有限公司 | Chemical blocking remover for polymer flooding injection well |
-
2014
- 2014-08-06 CN CN201410384429.5A patent/CN104194755B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1415688A (en) * | 2002-10-31 | 2003-05-07 | 大庆油田有限责任公司 | Chemical blocking remover for water injection well in oil field |
| CN101928557A (en) * | 2010-07-06 | 2010-12-29 | 中国海洋石油总公司 | Unblocking agent for polymer gel profile control agent |
| CN102816559A (en) * | 2012-07-30 | 2012-12-12 | 大庆井升伟业油田技术服务有限公司 | Chemical blocking remover for polymer flooding injection well |
Non-Patent Citations (6)
| Title |
|---|
| 包木太: "油田污水中聚丙烯酰胺（HPAM）的降解机理研究", 《高分子通报》 * |
| 南玉明: "聚丙烯酰胺的化学降解研究", 《大庆石油学院学报》 * |
| 吴迪: "曝气对聚合物驱采出水流变性和油水分离特性的影响", 《油田化学》 * |
| 安郁琴: "《制浆造纸助剂》", 30 August 2012, 中国轻工业出版社 * |
| 张学佳: "聚丙烯酰胺降解的研究进展", 《油气田环境保护》 * |
| 张景存: "《提高采收率方法研究》", 30 December 1991, 石油工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107418544A (en) * | 2017-06-09 | 2017-12-01 | 天津亿利科能源科技发展股份有限公司 | A kind of water injection well in oil fields profile control that handles causes the composite drug and method of stifled well |
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