CN102618250B - Preparation method of environmental-friendly demulsify-cleanup additive for fracture acidizing - Google Patents
Preparation method of environmental-friendly demulsify-cleanup additive for fracture acidizing Download PDFInfo
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- CN102618250B CN102618250B CN201210053153.3A CN201210053153A CN102618250B CN 102618250 B CN102618250 B CN 102618250B CN 201210053153 A CN201210053153 A CN 201210053153A CN 102618250 B CN102618250 B CN 102618250B
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Abstract
The invention provides a preparation method of an environmental-friendly demulsify-cleanup additive for fracture acidizing and is characterized in that the environmental-friendly demulsify-cleanup additive for fracture acidizing is prepared according to the following proportion in parts by weight (the unit is gram): 100 parts of environmental-friendly demulsify-cleanup additive for fracture acidizing comprise 20-25 parts of biological de-emulsifier SWP, 10-15 parts of alkyl polyglucosides, 20-30 parts of low-molecular alcohol and residual amount water. The environmental-friendly demulsify-cleanup additive for fracture acidizing belongs to pure green degradable substance, has no pollution to the environment, has the surface tension of 27.17 mN/m and the interfacial tension of 0.6640 mN/m and has better cleanup performance; the demulsification rate of the demulsify-cleanup additive is more than 90%, oil water emulsion can be radically demulsified and separated, and meanwhile, the demulsify-cleanup additive is multipurpose and can be conveniently added on site.
Description
Technical field
The present invention relates to oil-gas field fracturing technology field, is the preparation method of environment-friendly type fracture acidizing demulsification cleanup agent.
Background technology
For low pressure, LOW PERMEABILITY RESERVOIR, fracturing reform be bring in a well, old well production potential tapping volume increase major measure.The fracturing liquid of poor performance easily causes the reservoir damages such as water-sensitive, water lock, emulsion plugging to reservoir, reservoir permeability is reduced, and then affects correctional effect.The emulsion splitter and the cleanup additive that add better performances in fracturing liquid can prevent fracturing liquid from causing water blocking damage and emulsion plugging to reservoir, improve reservoir reconstruction effect.The main component of demulsification cleanup agent is tensio-active agent, because tensio-active agent formation has wetting action, sandstone surface is generally electronegative, cationic tensio-active agent easily makes rock generation wettability reversal stop the smooth outflow of crude oil, simultaneously, the requirement of people to environmental protection is also more and more higher, and the additive of chemical classes is easily to environment.A kind of biodegradable environment-friendly type demulsification cleanup agent formed primarily of negatively charged ion and nonionogenic tenside of this patent Introduction, this demulsification cleanup agent formation can not produce absorption, breakdown of emulsion ability is strong, breaking glue solution surface and interface tension force is low, biodegradable environmentally friendly, can not to environment.
Chinese patent application 91107226 discloses " acidifying and fracturing technology cleanup additive ", and it is made up of fluorine-containing amide group cation quaternary ammonium salt and non-ionic type silane and methyl alcohol or ethylene glycol, can obviously reduce fracturing working fluid surface tension.It is said this invention good product performance, consumption accounts for greatly between the 1%--0.5% of fracturing liquid weight, belongs to chemical type, can pollute environment, easily on sandstone, produces absorption.
Chinese Patent Application No. 201010251665.1 discloses " a kind of novel demulsification cleanup agent ", its formula consists of: permeate agent, agricultural chemicals wetting agent, pressure break demulsification cleanup agent, fluorocarbon surfactant, sodium formiate, methyl alcohol, water, moiety more complicated, preparation needs stirring 60 minutes, the preparation time is oversize, and the specific performance index of this product and the technical superiority compared with other products are not described.Product category is many, belongs to the product of chemical type, easily to environment.
Summary of the invention
The object of this invention is to provide a kind of environment-friendly type fracture acidizing demulsification cleanup agent and its preparation method, improve fracture acidizing liquid and return row and lead, Low Damage and degradable.
Technical scheme of the present invention is the preparation method of environment-friendly type fracture acidizing demulsification cleanup agent, it is characterized in that: this environment-friendly type fracture acidizing demulsification cleanup agent is configured according to following ratio:
The environment-friendly type fracture acidizing demulsification cleanup agent of 100 parts is by biological demulsifying agent SWP20-25 part, and alkyl polyglycoside 10-15 part, low mass molecule alcohol 20-30 part, surplus is water.
The preparation method of environment-friendly type fracture acidizing demulsification cleanup agent, is characterized in that: this environment-friendly type fracture acidizing demulsification cleanup agent is configured according to following step:
Step one, the alkyl polyglycoside getting 10 to 15 parts adds the low mass molecule alcohol of 20 to 30 parts, at room temperature stirs, and is uniformly dissolved, obtain mixing liquid 1;
Step 2, the mixing liquid 1 step one obtained adds the biological demulsifying agent SWP of 20 to 25 parts, and stirs, and obtains mixing liquid 2;
Step 3, the mixing liquid 2 step 2 obtained adds water, makes its gross weight be 100 parts, at room temperature stirs, and obtains environment-friendly type fracture acidizing demulsification cleanup agent.
Described low mass molecule alcohol is any one in methyl alcohol, ethanol or Virahol.
Carbon number in described alkyl polyglycoside is between 12 to 14, and alkyl polyglycoside is synthesized by renewable resources natural fat alcohol and glucose, is the more comprehensive new non-ionic surfactants of a kind of performance.
Described biological demulsifying agent SWP is the fermented product utilizing different carbon source to generate by Pseudomonas aeruginosa.
Environment-friendly type fracture acidizing demulsification cleanup agent directly adds in fracturing liquid or acidizing fluid by the dosage that the mass percent that it accounts for fracturing liquid consumption is 0.2%-0.5% and uses.
This demulsification cleanup agent laboratory experiment test result, 0.3% mass percent concentration surface tension 27.17mN/m, interfacial tension 0.6640 mN/m, with crude oil demulsification rate more than 90%.
Feature of the present invention is: 1, this demulsification cleanup agent belongs to pure degradable green material, environmentally safe; 2, surface tension 27.17mN/m, interfacial tension 0.6640 mN/m, the row's of helping better performances; 3, this demulsification cleanup agent demulsification efficiency is more than 90%, can make the thorough break milk separation of water-oil emulsion; 4, potion is multiplex, and scene adds conveniently.
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated.
The preparation method of environment-friendly type fracture acidizing demulsification cleanup agent, is characterized in that: this environment-friendly type fracture acidizing demulsification cleanup agent is configured according to following ratio:
The environment-friendly type fracture acidizing demulsification cleanup agent of 100 parts is by biological demulsifying agent SWP20-25 part, and alkyl polyglycoside 10-15 part, low mass molecule alcohol 20-30 part, surplus is water.(ratio of said components is weight part)
The preparation method of environment-friendly type fracture acidizing demulsification cleanup agent, is characterized in that: this environment-friendly type fracture acidizing demulsification cleanup agent is configured according to following step:
Step 1), the alkyl polyglycoside getting 10 to 15 parts adds the low mass molecule alcohol of 20 to 30 parts, at room temperature stirs, and is uniformly dissolved, obtain mixing liquid 1;
Step 2), the mixing liquid 1 step 1) obtained adds the biological demulsifying agent SWP of 20 to 25 parts, and stirs, and obtains mixing liquid 2;
Step 3), by step 2) mixing liquid 2 that obtains adds water, and make its gross weight be 100 parts, at room temperature stir, obtain environment-friendly type fracture acidizing demulsification cleanup agent.
Embodiment 1
The fermented product that biological demulsifying agent SWP utilizes different carbon source to generate by Pseudomonas aeruginosa, all can not form harm to microorganism, animals and humans, and this product is produced by Hangzhou Gemking Biotech Co., Ltd. and provided.
Alkyl polyglycoside is the commercially available prod of carbon number between 12-14.This product is synthesized by renewable resources natural fat alcohol and glucose, it is the more comprehensive new non-ionic surfactants of a kind of performance, have the characteristic of conventional nonionic and anion surfactant concurrently, having high surface, good ecological security and intermiscibility, is internationally recognized first-selection " green " functional surfactant.
The alkyl polyglycoside getting 10 grams is dissolved in the ethanol of 20 grams, at room temperature stirs, and is uniformly dissolved; Then add 20g biological demulsifying agent SWP, and stir; The water finally adding 50 grams stirs and namely makes the biodegradable environment-friendly type demulsification cleanup agent of 100g.
Embodiment 2
The present embodiment is substantially identical with embodiment 1 layoutprocedure, unlike getting 15g alkyl polyglycoside, is dissolved in 30g ethanol, stir, then add 25g biological demulsifying agent SWP, stir, the water finally adding 30g stirs and namely makes the biodegradable environment-friendly type demulsification cleanup agent of 100g.
Embodiment 3
The present embodiment is substantially identical with embodiment 1 layoutprocedure, unlike getting 12g alkyl polyglycoside, is dissolved in 28g ethanol, stir, then add 23g biological demulsifying agent SWP, stir, the water finally adding 37g stirs and namely makes the biodegradable environment-friendly type demulsification cleanup agent of 100g.
Embodiment 4
Test pit 1 is a bite prospect pit of Yanchang Oilfield West oil recovery factory, is positioned at Zhidan County dawn eight town Liu Wan village, intends understanding this block oil-containing situation by fracturing reform formation testing.This well fractured layer position is long by 9, fractured well section 1987.0-1994.0m and 2004.0-2009.0m.Fracturing liquid guanidine glue aqueous fracturing fluid, add in fracturing liquid and account for the demulsification cleanup agent of the present invention that fracturing liquid consumption mass percent is 0.3%, after pressure, the row of returning leads high, reaches 88.86%, and oil increasing effect is good.Test effect is as table 1, table 2.
After table 1 test pit pressure, the row of returning leads
Table 2 test pit fracturing effect
Embodiment 5
Test pit 2 is a bite prospect pits of oil recovery factory of Yanchang Oilfield Wuqi County, is positioned at Wu Cang fort township, Wuqi County, intends understanding this block oil-containing situation by fracturing reform formation testing, ites is desirable to find new oil-containing block.This well fractured well section 2090.4-2104.4m.The fracturing liquid of fracturing liquid is water base guanidine gum fracturing fluid, adds and accounts for the demulsification cleanup agent that fracturing liquid consumption mass percent is this invention of 0.5%, after pressure break with can contrast compared with well, the row of returning leads high, and after pressure, oil increasing effect is obvious.Test effect is as table 3, table 4.
After table 3 test pit pressure, the row of returning leads
Table 4 test pit tested production value and offset wells correlation
。
Claims (1)
1. the application method of environment-friendly type fracture acidizing demulsification cleanup agent in fracturing liquid, is characterized in that: the environment-friendly type fracture acidizing demulsification cleanup agent of 100 parts by biological demulsifying SWP20-25 part, alkyl polyglycoside 10-15 part, low mass molecule alcohol 20-30 part, surplus is water; Preparation method specifically comprises the steps:
Step one, the alkyl polyglycoside getting 10 to 15 parts adds the low mass molecule alcohol of 20 to 30 parts, at room temperature stirs, and is uniformly dissolved, obtain mixing liquid 1;
Step 2, the mixing liquid 1 step one obtained adds the biological demulsifying agent SWP of 20 to 25 parts, and stirs, and obtains mixing liquid 2;
Step 3, the mixing liquid 2 step 2 obtained adds water, makes its gross weight be 100 parts, at room temperature stirs, and obtains environment-friendly type fracture acidizing demulsification cleanup agent;
Described low mass molecule alcohol is any one in methyl alcohol, ethanol or Virahol;
Carbon number in described alkyl polyglycoside is between 12 to 14, and alkyl polyglycoside is synthesized by renewable resources natural fat alcohol and glucose;
Described biological demulsifying agent SWP is the fermented product utilizing different carbon source to generate by Pseudomonas aeruginosa;
Described environment-friendly type fracture acidizing demulsification cleanup agent directly adds in fracturing liquid by the dosage that the mass percent that it accounts for fracturing liquid consumption is 0.3%-0.5% and uses; Its surface tension 27.17mN/m, interfacial tension 0.6640 mN/m, can make the thorough break milk separation of water-oil emulsion.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103923632B (en) * | 2014-01-28 | 2017-01-25 | 北京大德广源石油技术服务有限公司 | Desorbent and its evaluation method |
| CN114426828A (en) * | 2020-09-25 | 2022-05-03 | 中国石油化工股份有限公司 | Oil washing demulsifier for fracturing fluid and application thereof |
| CN112480899B (en) * | 2020-12-11 | 2022-05-24 | 德仕能源科技集团股份有限公司 | Demulsification and cleanup additive for fracturing and preparation method thereof |
| CN115785940A (en) * | 2022-12-01 | 2023-03-14 | 克拉玛依中科恒信科技有限责任公司 | Demulsification cleanup additive for fracture acidizing and preparation method and use method thereof |
| CN116218507B (en) * | 2023-05-08 | 2023-08-15 | 东营江源化工有限公司 | Demulsification and drainage-assisting composite additive for fracturing and acidizing and preparation method thereof |
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| CN102031102A (en) * | 2010-11-18 | 2011-04-27 | 陕西延长石油(集团)有限责任公司研究院 | Preparation method and fracturing construction method of locally and continuously mixed clean fracturing fluid additive |
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| WO2010094937A1 (en) * | 2009-02-20 | 2010-08-26 | M-I Drilling Fluids Uk Limited | Wellbore fluid and methods of treating an earthen formation |
| CN101838528A (en) * | 2009-03-17 | 2010-09-22 | 大连百奥泰科技有限公司 | Environment-friendly and bio-available green fracturing fluid system |
| CN101792661A (en) * | 2010-03-25 | 2010-08-04 | 西安石油大学 | Biological activator for compound production promoter used in oil production |
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