CN105670587A - Multifunctional oil-based mud cleaning liquid and preparation method thereof - Google Patents
Multifunctional oil-based mud cleaning liquid and preparation method thereof Download PDFInfo
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- CN105670587A CN105670587A CN201610018646.1A CN201610018646A CN105670587A CN 105670587 A CN105670587 A CN 105670587A CN 201610018646 A CN201610018646 A CN 201610018646A CN 105670587 A CN105670587 A CN 105670587A
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- base mud
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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
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
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Abstract
The invention discloses a multifunctional oil-based mud cleaning liquid and a preparation method thereof. The multifunctional oil-based mud cleaning liquid comprises, by weight, 5-20 parts of nonionic surfactants, 0-10 parts of an organic acid and 60-95 parts of water, wherein the nonionic surfactants comprises at least two of fatty alcohol-polyoxyethylene ether, alkyl glycoside and alkylphenol ethoxylate. The preparation method comprises component mixing and stirring. The multifunctional oil-based mud cleaning liquid is suitable for a high-temperature high-salt complex environment with a wide range, can be used for cleaning oil-based mud-polluted casing pipe and well walls and removing oil-based mud cake, has a scientific formula, small toxicity and a low environmental pollution level and is conducive to safe production and environmental protection.
Description
Technical field
The application relates to a kind of multi-functional oil base mud cleans liquid and preparation method thereof, particularly to a kind of multi-functional oil base mud cleans liquid adapting to different temperature and salinity range and preparation method thereof.
Background technology
Oil base drilling fluid has Heat stability is good, and density range is big, and rheological characteristic is prone to adjust, and is resistant to various saline pollution, mud shale has the advantages such as very strong inhibition; And owing to filtrate is oil phase, it is to avoid the water-sensitive effect of oil reservoir, therefore for the wellblock that reservoir water sensitivity degree is higher, often utilize oil-base mud to drill, do not encroached on reservoir protec-tion. But the deposit of the oil base drilling fluid that oil base drilling fluid is formed on casing wall and the borehole wall and mud cake, had a strong impact on brill total completion time, therefore the cleaning of oil-base mud is requisite work.
Current oil-base mud cleanout fluid, although all having certain cleaning performance, but often have that dosage of surfactant is big, cost is high, formula and preparation process is complicated and the problem that is unfavorable for environmental protection, additionally, most oil-base mud cleanout fluid can not meet the environment of high temperature and high salt, or the temperature being suitable for and salinity range are narrower, and function is relatively single.
It is thus desirable to a kind of multi-functional oil base mud cleans liquid meeting environmental requirement and preparation method thereof.
Summary of the invention
The purpose of the application is to provide a kind of multi-functional oil base mud cleans liquid.
Multi-functional oil base mud cleans liquid provided herein, water including the nonionic surfactant of 5～20 weight portions, the organic acid of 0～10 weight portion and 60～95 weight portions, wherein, described nonionic surfactant is at least two in fatty alcohol-polyoxyethylene ether, alkyl polyglucoside and alkylphenol polyoxyethylene.
In some embodiments, described nonionic surfactant can be fatty alcohol-polyoxyethylene ether and alkyl polyglucoside, and fatty alcohol-polyoxyethylene ether: the weight ratio of alkyl polyglucoside is 1:2～5:9.
In some embodiments, described nonionic surfactant can be fatty alcohol-polyoxyethylene ether and alkylphenol polyoxyethylene, and fatty alcohol-polyoxyethylene ether: the weight ratio of alkylphenol polyoxyethylene is 1:1～11:9.
In some embodiments, described multi-functional oil base mud cleans liquid can also include the betaine type amphoteric surfac-tant of 3.75～15 weight portions.
In some embodiments, described nonionic surfactant: the weight ratio of betaine type amphoteric surfac-tant can be 4:3.
In some embodiments, described betaine type amphoteric surfac-tant can select the group of free glycine betaine, alkyl betaine, sulfonic group glycine betaine, phosphate ester glycine betaine and amido betaine composition.
In some embodiments, described organic acid can select the group of free acetic acid, pyrovinic acid, citric acid, caproic acid and oxalic acid composition.
The another object of the application is to provide a kind of method preparing multi-functional oil base mud cleans liquid.
The provided herein method preparing multi-functional oil base mud cleans liquid includes mixing nonionic surfactant, amphoteric surfactant, organic acid and water, stirring.
Present inventor is by carrying out composite to metallic walls, the cleaning of the borehole wall and the substantially unfruitful single surfactant of removing of mud cake, surprisingly, it is found that the cleansing power of surfactant obtains and significantly improves. Multi-functional oil base mud cleans liquid prepared by the composite surfactant of interpolation the application can be hydrophilic by changing into of oleophylic by the wettability of the metallic walls of pollution and the borehole wall, thus the oil-base mud deposit washed well on metallic walls and the borehole wall, reduce recontamination, improve cementing quality simultaneously, and mud cake can be removed to a certain extent, be simultaneously suitable for the environment of the high temperature and high salt of wider range.
The multi-functional oil base mud cleans liquid phase of the application is compared with existing oil-base mud cleanout fluid; dispensing science; toxicity is little; environmental pollution degree is low; be conducive to safety in production and environmental conservation; and it is applicable under various complex environments, the cleaning of sleeve pipe, the borehole wall and oil-base mud mud cake that oil-base mud pollutes.
Accompanying drawing explanation
Fig. 1 is the multi-functional oil base mud cleans liquid of the embodiment 5 preparation elimination effect figure to the borehole wall that oil-base mud pollutes.
Fig. 2 is the multi-functional oil base mud cleans liquid of the embodiment 3 preparation elimination effect figure to oil-base mud mud cake.
Fig. 3 be the multi-functional oil base mud cleans liquid of embodiment 3 preparation aging at 150 DEG C after the cleaning performance figure of metallic walls that oil-base mud is polluted.
Detailed description of the invention
Describe presently filed embodiment by the examples below, it will be appreciated by the person skilled in the art that these specific embodiments only indicate that to reach the purpose of the application and the enforcement technical scheme that selects, be not the restriction to technical scheme. According to teachings of the present application, it is obvious in conjunction with prior art to the improvement of technical scheme, belongs to the scope of the application protection.
The raw material used in following example and reagent are common commercial goods.
The preparation of oil-base mud cleanout fluid
Embodiment 1
The preparation multi-functional oil base mud cleans liquid of 100g: weigh 5g fatty alcohol-polyoxyethylene ether (AEO-4), 10g alkyl polyglucoside (APG0814) and 85g water respectively, by each component mixing and stirring, namely obtain the multi-functional oil base mud cleans liquid of 100g.
Embodiment 2
The preparation multi-functional oil base mud cleans liquid of 100g: weigh 5.5g fatty alcohol-polyoxyethylene ether (AEO-4), 4.5g alkylphenol polyoxyethylene (OP-10), 7.5g cocamido propyl betaine, 7.5g acetic acid and 75g water respectively, by each component mixing and stirring, namely obtain the multi-functional oil base mud cleans liquid of 100g.
Embodiment 3
The preparation multi-functional oil base mud cleans liquid of 100g: weigh 11g fatty alcohol-polyoxyethylene ether (AEO-5), 9g alkylphenol polyoxyethylene (OP-8), 15g dodecyl Hydroxypropyl phosphate ester glycine betaine, 3.75g pyrovinic acid and 87.5g water respectively, by each component mixing and stirring, namely obtain the multi-functional oil base mud cleans liquid of 100g.
Embodiment 4
The preparation multi-functional oil base mud cleans liquid of 100g: weigh 2.5g fatty alcohol-polyoxyethylene ether (AEO-3), 5g alkyl polyglucoside (APG0810), 1g pyrovinic acid and 91.5g water respectively, by each component mixing and stirring, namely obtain the multi-functional oil base mud cleans liquid of 100g.
Embodiment 5
The preparation multi-functional oil base mud cleans liquid of 100g: weigh 7g fatty alcohol-polyoxyethylene ether (AEO-4), 13g alkyl polyglucoside (APG1214), 3g acetic acid and 77g water respectively, by each component mixing and stirring, namely obtain the multi-functional oil base mud cleans liquid of 100g.
Embodiment 6
The preparation multi-functional oil base mud cleans liquid of 100g: weigh 5g fatty alcohol-polyoxyethylene ether (AEO-4), 10g alkyl polyglucoside (APG0814), 10g caproic acid and 75g water respectively, by each component mixing and stirring, namely obtain the multi-functional oil base mud cleans liquid of 100g.
Comparative example 1
The preparation common oil base mud cleans liquid of 100g: weigh 10g fatty alcohol-polyoxyethylene ether (AEO-4) and 90g water respectively, by each component mixing and stirring, namely obtain the common oil base mud cleans liquid of 100g.
Comparative example 2
The preparation common oil base mud cleans liquid of 100g: weigh 10g octadecyldimethyl azochlorosulfonate propyl lycine and 90g water respectively, by each component mixing and stirring, namely obtain the common oil base mud cleans liquid of 100g.
Performance detects
Investigate the cleaning performance of the oil-base mud cleanout fluid prepared by embodiment 1-6 and comparative example 1-2 respectively by the following method.
1, the cleaning performance to metallic walls
The rotor of six speed viscometers is made of metal, and therefore by investigation oil-base mud cleanout fluid, the cleaning performance of the rotor of six speed viscometers is simulated its cleaning performance to metallic walls.
(1) oil-base mud that maintenance is good is poured slurry cup into, use six speed viscometers to stir oil-base mud 2min with the rotating speed of 300rpm;
(2) change the slurry cup equipped with oil-base mud cleanout fluid, clean the rotor 5min of six speed viscometers with the rotating speed of 300rpm;
(3) observe whether rotor is cleaned, and Taking Pictures recording.
2, the cleaning performance to the borehole wall
By investigating oil-base mud cleanout fluid, the cleaning performance of sand paper is simulated its cleaning performance to the borehole wall.
(1) oil-base mud and oil-base mud cleanout fluid are stood 20min respectively in normal pressure multiviscosity meter (Beijing perseverance Order instrument and meter company limited, H11814 type) and carry out maintenance;
(2) on the rotor of six speed viscometers, No. 0 sand paper is sticked;
(3) oil-base mud that maintenance is good is poured into slurry cup, sand paper by 2/3 is immersed in oil-base mud, cleaning performance contrast done by the clean sand paper staying 1/3, first stir oil-base mud 20min with the rotating speed of 600rpm, remove the slurry cup rotational speed 1min with 60rpm again, until the coated abrasive surface of 2/3 is uniformly stained with oil-base mud;
(4) change the slurry cup equipped with oil-base mud cleanout fluid, clean lower end 1/3 place of sand paper with the rotating speed of 200rpm, clean 7min, stay the non-cleaning part in centre to be allocated as contrast;
(5) whether the oil-base mud observing coated abrasive surface is cleaned, and with the wettability of water-wet method test interface. Test process is by water droplet on sand paper, if extravagance is opened, for water-wet, it is impossible to sprawl, is still that drop is then for glossy wet.
3, the elimination effect to oil-base mud mud cake
(1) preparation 1.2g/cm3CaCO3The oil-base mud increased the weight of.
(2) high pressure high temperature filter tester (U.S. Fann) commonly used in the art is utilized to form oil-base mud mud cake:
1) the oil-base mud serosity that step (1) is prepared is poured in infiltration closure instrument specimen cup commonly used in the art, before pouring serosity into, it is all dry for ensureing that infiltration blocks all parts of instrument specimen cup, and sealing ring does not deform or weares and teares. By serosity down within the 13mm of specimen cup top. Composition infiltration closure instrument specimen cup, blocks instrument specimen cup by infiltration rack-mount, and closes air relief valve, transfer a container at discharging tube;
2) specimen cup of infiltration closure instrument is heated to 150 DEG C;
3) specimen cup is adjusted to upper pressure 600psi, presses down 100psi, maintain 30min and namely form oil-base mud mud cake.
(3) oil-base mud mud cake is taken out, after soaking 6h in oil-base mud cleanout fluid, observe elimination effect.
4, the high temperature and high salt impact on cleanout fluid
(1) oil-base mud cleanout fluid is stood at 80 DEG C or 150 DEG C 5h and carries out aging, then according to detection method 1 investigate its aging after cleaning performance to metallic walls, and carry out contrast see if there is change with the cleaning performance before aging.
(2) in oil-base mud cleanout fluid, add NaCl or KCl and be up to saturated, investigate its cleaning performance to metallic walls according to detection method 1, and carry out contrast see if there is change with the cleaning performance before salt adding, if unchanged, represent that salt-resistance is strong.
The performance test results of oil-base mud cleanout fluid prepared by table 1 embodiment 1-6 and comparative example 1-2.
Be can be seen that by the data of table 1, add single nonionic surfactant or oil-base mud cleanout fluid prepared by betaine type amphoteric surfac-tant to the removing of metallic walls, the cleaning of the borehole wall and mud cake substantially to no effect, but multi-functional oil base mud cleans liquid prepared by the composite surfactant adding the application can wash the oil-base mud deposit on metallic walls and the borehole wall well, this is because composite surfactant can be hydrophilic by changing into of oleophylic by the wettability of the metallic walls of pollution and the borehole wall; Can be seen that in conjunction with Fig. 1, the multi-functional oil base mud cleans liquid of the embodiment of the present application 5 preparation to the cleaning efficiency of the borehole wall substantially more than 96%, illustrate that the composite cleansing power making surfactant is significantly improved so that the product of the application can as oil-base mud cleanout fluid. Simultaneously, the product of the application can remove mud cake to a certain extent, can as the scavenger of filter cake, and it is after adding organic acid, the elimination effect of mud cake is better, this is because organic acid can by mud cake can be acid-soluble be partly dissolved, wherein when organic acid is pyrovinic acid or acetic acid, the elimination effect of mud cake is better. And, through high-temperature process and the high salt treatment of 80 DEG C or 150 DEG C, the product of the application is unchanged to the cleaning performance of metallic walls, illustrate that the product of the application is applicable to the salinity range of the temperature range of room temperature～150 DEG C and 0～saturated, not only meet the environment of high temperature and high salt, and the temperature being suitable for and salinity range are wider. Therefore, the oil-base mud cleanout fluid of the application has multi-functional advantage.
The described preferred embodiment being only the application, not makes any formal and substantial restriction to the application. Those skilled in the art, without departing from the scope of technical scheme, the equivalent variations of a little change, modification and the differentiation made when available disclosed above technology contents is the Equivalent embodiments of the application; Meanwhile, above example is made by the substantial technological of all foundation the application the change of any equivalent variations, modification and differentiation etc. are all in the scope being defined by the claims of the application.
Claims (8)
1. a multi-functional oil base mud cleans liquid, it is characterized in that, described oil-base mud cleanout fluid includes the water of the nonionic surfactant of 5～20 weight portions, the organic acid of 0～10 weight portion and 60～95 weight portions, wherein, described nonionic surfactant is at least two in fatty alcohol-polyoxyethylene ether, alkyl polyglucoside and alkylphenol polyoxyethylene.
2. multi-functional oil base mud cleans liquid according to claim 1, wherein said nonionic surfactant is fatty alcohol-polyoxyethylene ether and alkyl polyglucoside, and fatty alcohol-polyoxyethylene ether: the weight ratio of alkyl polyglucoside is 1:2～5:9.
3. multi-functional oil base mud cleans liquid according to claim 1, wherein said nonionic surfactant is fatty alcohol-polyoxyethylene ether and alkylphenol polyoxyethylene, and fatty alcohol-polyoxyethylene ether: the weight ratio of alkylphenol polyoxyethylene is 1:1～11:9.
4. the multi-functional oil base mud cleans liquid according to any one of claim 1-3, also includes the betaine type amphoteric surfac-tant of 3.75～15 weight portions.
5. multi-functional oil base mud cleans liquid according to claim 4, wherein, described nonionic surfactant: the weight ratio of betaine type amphoteric surfac-tant is 4:3.
6. multi-functional oil base mud cleans liquid according to claim 4, wherein, described betaine type amphoteric surfac-tant selects the group of free glycine betaine, alkyl betaine, sulfonic group glycine betaine, phosphate ester glycine betaine and amido betaine composition.
7. multi-functional oil base mud cleans liquid according to claim 1, wherein, described organic acid selects the group of free acetic acid, pyrovinic acid, citric acid, caproic acid and oxalic acid composition.
8. the method preparing multi-functional oil base mud cleans liquid according to any one of claim 1-7, described method includes mixing described each component, stirring.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107603576A (en) * | 2017-07-27 | 2018-01-19 | 中国海洋石油总公司 | A kind of well cementation oil-based mud flushing liquor and its preparation and evaluation method |
| CN110257033A (en) * | 2019-06-04 | 2019-09-20 | 中国海洋石油集团有限公司 | A kind of water-base cleaning liquid and its preparation method and application |
| CN110763746A (en) * | 2019-10-21 | 2020-02-07 | 河北冀研能源科学技术研究院有限公司 | Online sodium surface electrode activator for power plant and application |
| CN110804429A (en) * | 2018-08-06 | 2020-02-18 | 中国石油天然气股份有限公司 | Oil-based drilling fluid oil sludge pollution cleaning fluid and preparation method thereof |
| CN111826146A (en) * | 2020-08-06 | 2020-10-27 | 中国石油大学(北京) | Method for cleaning oil-based mud by using cloud point and in-situ emulsification in synergy manner and matched cleaning agent |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034780A (en) * | 1988-12-30 | 1989-08-16 | 大庆石油管理局钻开研究所 | The flushing liquor of oil-base mud |
| CN1405265A (en) * | 2002-11-18 | 2003-03-26 | 大庆石油管理局 | Oil-based mud flushing liquor and preparation method thereof |
| CN103965845A (en) * | 2013-02-05 | 2014-08-06 | 中国石油化工股份有限公司 | Flushing fluid for cementing of horizontal shale gas well |
| CN104745165A (en) * | 2015-02-25 | 2015-07-01 | 中国石油集团渤海钻探工程有限公司 | Salty flushing fluid for well cementation and preparation method thereof |
-
2016
- 2016-01-12 CN CN201610018646.1A patent/CN105670587B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034780A (en) * | 1988-12-30 | 1989-08-16 | 大庆石油管理局钻开研究所 | The flushing liquor of oil-base mud |
| CN1405265A (en) * | 2002-11-18 | 2003-03-26 | 大庆石油管理局 | Oil-based mud flushing liquor and preparation method thereof |
| CN103965845A (en) * | 2013-02-05 | 2014-08-06 | 中国石油化工股份有限公司 | Flushing fluid for cementing of horizontal shale gas well |
| CN104745165A (en) * | 2015-02-25 | 2015-07-01 | 中国石油集团渤海钻探工程有限公司 | Salty flushing fluid for well cementation and preparation method thereof |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107603576A (en) * | 2017-07-27 | 2018-01-19 | 中国海洋石油总公司 | A kind of well cementation oil-based mud flushing liquor and its preparation and evaluation method |
| CN107603576B (en) * | 2017-07-27 | 2020-11-24 | 中国海洋石油集团有限公司 | Oil-based mud flushing fluid for well cementation and preparation and evaluation methods thereof |
| CN110804429A (en) * | 2018-08-06 | 2020-02-18 | 中国石油天然气股份有限公司 | Oil-based drilling fluid oil sludge pollution cleaning fluid and preparation method thereof |
| CN110804429B (en) * | 2018-08-06 | 2022-02-01 | 中国石油天然气股份有限公司 | Oil-based drilling fluid oil sludge pollution cleaning fluid and preparation method thereof |
| CN110257033A (en) * | 2019-06-04 | 2019-09-20 | 中国海洋石油集团有限公司 | A kind of water-base cleaning liquid and its preparation method and application |
| CN110257033B (en) * | 2019-06-04 | 2021-09-10 | 中国海洋石油集团有限公司 | Water-based cleaning solution and preparation method and application thereof |
| CN110763746A (en) * | 2019-10-21 | 2020-02-07 | 河北冀研能源科学技术研究院有限公司 | Online sodium surface electrode activator for power plant and application |
| CN111826146A (en) * | 2020-08-06 | 2020-10-27 | 中国石油大学(北京) | Method for cleaning oil-based mud by using cloud point and in-situ emulsification in synergy manner and matched cleaning agent |
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Applicant after: China Offshore Oil Group Co., Ltd. Applicant after: China Oilfield Services Limited Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Applicant before: China National Offshore Oil Corporation Applicant before: China Oilfield Services Limited |
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