CN101805601B - Break-free fracturing fluid - Google Patents
Break-free fracturing fluid Download PDFInfo
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- CN101805601B CN101805601B CN 201010157881 CN201010157881A CN101805601B CN 101805601 B CN101805601 B CN 101805601B CN 201010157881 CN201010157881 CN 201010157881 CN 201010157881 A CN201010157881 A CN 201010157881A CN 101805601 B CN101805601 B CN 101805601B
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Abstract
The invention discloses break-free fracturing fluid, which comprises the following components in part by weight: 1 to 3 parts of long carbon chain fatty acid salt, 2 to 8 parts of organosilicon quaternary ammonium salt monomer, 1 to 5 parts of anionic surfactant and halide, and the balance of water. The method for preparing the break-free fracturing fluid comprises the following steps: mix the 1 to 3 parts of long carbon chain fatty acid salt, 2 to 8 parts of organosilicon quaternary ammonium salt monomer and 1 to 5 parts of anionic surfactant and halide by adding the balance of water at normal temperature; and stirring and reacting for 60 to 100 minutes at the rotating speed of 500 to 1,000 revolutions per minute. The break-free fracturing fluid has the characteristics that the break-free fracturing fluid has low molecular weight, no polymer, no residue, and no breaker, can be automatically dissolved under the action of formation oil and formation water, reduces the viscosity to below 5mPa.s, does not causes loss of the core permeability, avoids secondary pollution on the stratum, can realize total flowback, and can be used at the temperature of 150 DEG C. The break-free fracturing fluid can be widely applied to oil field production technology.
Description
One, technical field
The present invention relates to oil production underground fracture operation entry well fluid, relate in particular to a kind of break-free fracturing fluid.
Two, background technology
Present fracture in oil and water wells operation working fluid; The polymer class fracturing liquid systems that adopt more; For the smooth implementation of oil well production increasing fracturing technique contributes, but exist following shortcoming or deficiency simultaneously: 1. polymkeric substance fracturing fluid residue amount is big, and is higher to the stratum permeability loss; 2. broken glue difficulty, the row of returning leads low, and fracturing liquid is prone to the stratum is produced the secondary injury; 3. the loss of pressure break fluid viscosity is big under the high temperature.According to statistics, the of the fracturing fluid row of returning of polymkeric substance such as guanidine glue leads and has only 35%-45%; 4. use temperature is low.
Three, summary of the invention
The purpose of this invention is to provide a kind of fracturing liquid of exempting from brokenly glue; The employing low-molecular weight compound is formed, and no polymkeric substance, no residue do not have injury to the stratum; Under the effect of local water or crude oil; Viscosity drops to below the 5mPa.s automatically, can realize all rows of returning, the shortcoming or the deficiency that overcome effectively or avoid existing in the above-mentioned prior art.
Break-free fracturing fluid of the present invention, its component and proportioning are following, and said proportioning is a weight part:
Long chain fatty acid salt 1-3 organosilicon quaternary ammonium salt monomer 2-8
AS 1-5 halogenide 1-5 surplus is a water,
Its compound method is: at normal temperatures; With the hard soap of 2-3 part, the organosilicon quaternary ammonium salt monomer of 2-8 part, the AS of 1-5 part and the halogenide of 1-5 part; Add in the excess water and mix, under the rotating speed that PM 500-1000 changes, be prepared from stirring reaction 60-100 minute.
Wherein, described long chain fatty acid salt is C
12-C
22Higly branched chain alkyl fatty hydrochlorate.Said C
12-C
22Higly branched chain alkyl fatty hydrochlorate be 2-hydroxyethyl lauric acid.Said AS is a salicylate.Said organosilicon quaternary ammonium salt monomer is formed by tetraethoxy and lauryl amine prepared in reaction, and its mass concentration ratio is 1-3: 2-5.Said halogenide is from NaX, NH
4Select among X, the KX, wherein X is C1 or Br.
Wherein, said organosilicon quaternary ammonium salt monomer is prepared by following method: in the pH value is in the basic soln of 9-12, and adding weight part is tetraethoxy of 1-3 part and the lauryl amine of 2-5 part, through distillation reaction 10-14 hour, after purification by liquid extraction form.
The performance index of break-free fracturing fluid of the present invention are viscosity: 300-1000mPa.s; The highest sand ratio of taking: 60%; Maximum operation (service) temperature: 150 ℃; Level of residue:＜0.5%; Core permeability injury:＜1%; Anti-shear performance: continuous shear viscosity descended＜5% in 120 minutes.
The present invention has following advantage compared with prior art:
1, the molecular weight of all components all is lower than 1000, is a kind of non-polymer system, no residue, and the rate of permeation free of losses to rock core can not cause secondary pollution to the stratum;
2, viscosity does not receive the prolongation of shear time and reduces, and can guarantee construction safety, improves and takes the sand ratio, and this highest of the fracturing fluid use sand ratio can reach 60%;
3, need not to add gel breaker, can be under the effect of in-place oil and local water, dissolving automatically, viscosity drops to below the 5mPa.s, can realize all rows of returning;
4, use temperature is high, can reach 150 ℃.
Five, embodiment
A kind of break-free fracturing fluid, its component and proportioning are following, and said proportioning is a weight part:
Long chain fatty acid salt 1-3 organosilicon quaternary ammonium salt monomer 2-8
AS 1-5 halogenide 1-5 surplus is a water,
Its compound method is: at normal temperatures; With the hard soap of 1-3 part, the organosilicon quaternary ammonium salt monomer of 2-8 part, the AS of 1-5 part and the halogenide of 1-5 part; Add in the excess water and mix, under the rotating speed that PM 500-1000 changes, be prepared from stirring reaction 60-100 minute.
Long chain fatty acid salt is C
12-C
22Higly branched chain alkyl fatty hydrochlorate.Said C
12-C
22Higly branched chain alkyl fatty hydrochlorate be 2-hydroxyethyl lauric acid.Said AS is a salicylate.Said organosilicon quaternary ammonium salt monomer by its mass concentration ratio be 1-3: 2-5 the reaction of tetraethoxy and lauryl amine (how?) be prepared from.Said halogenide is from NaX, NH
4Select among X, the KX, wherein X is Cl or Br.
Organosilicon quaternary ammonium salt monomer compound method is: in the basic soln of 9-12, add tetraethoxy of 1-3 part and the lauryl amine of 2-5 part in the pH value, through distillation reaction 10-14 hour, after purification by liquid extraction form.
Provide specific embodiment below the present invention:
Embodiment one
2 parts of organosilicon quaternary ammonium salt monomers, 1 part of 2-hydroxyethyl lauric acid, 0.5 part of SS and 0.5 part of KCl are joined in 96 parts of water, and stirring reaction was prepared from 60 minutes under the speed that PM 500 changes.The break-free fracturing fluid for preparing can reach under the viscosity normal temperature about 600mPa.s, and bottom temperature (below 70 ℃) viscosity down can reach 300-600mPa.s, can satisfy the construction needs.
The monomeric preparation method of organosilicon quaternary ammonium salt is: in the pH value is 9 basic soln, add 1 part tetraethoxy and 2 parts lauryl amine, through distillation reaction 10 hours, after purification by liquid extraction form.
Embodiment two
5 parts organosilicon quaternary ammonium salt monomers, 2 parts 2-hydroxyethyl 16 carbonic acid or 2-hydroxyethyl 18 carbonic acid, 1 part SS and 2 parts KBr are joined in 90 parts of water, under the speed that PM 700 changes, mix and be prepared from 40 minutes.Can reach about 800mPa.s under the break-free fracturing fluid viscosity normal temperature for preparing, bottom temperature (70 ℃-120 ℃) viscosity down can reach 300-600mPa.s, can satisfy the needs of construction.
The monomeric preparation method of organosilicon quaternary ammonium salt is: in the pH value is 11 basic soln, add 2 parts tetraethoxy and 3 parts lauryl amine, through distillation reaction 12 hours, after purification by liquid extraction form.
Embodiment three
8 parts of organosilicon quaternary ammonium salt monomers, 3 parts of 2-hydroxyethyl 18 carbonic acid, 2 parts of SSs and 3 parts of KCl are joined in 84 parts of water, under the speed that PM 1000 changes, mix and be prepared from 60 minutes.Can reach about 1000mPa.s under the fracturing liquid viscosity normal temperature for preparing, bottom temperature (120-150 ℃) viscosity down can reach 400-600mPa.s, can satisfy the construction needs.
The monomeric preparation method of organosilicon quaternary ammonium salt is: in the pH value is 12 basic soln, add 3 parts tetraethoxy and 5 parts lauryl amine, through distillation reaction 14 hours, after purification by liquid extraction form.
The technical indicator of the break-free fracturing fluid that various embodiments of the present invention prepare is following:
Viscosity 300-1000mPa.s; The highest sand of taking is than 60%; 150 ℃ of maximum operation (service) temperatures; 120 minutes continuous shear viscosities of anti-shear performance descend＜5%; Level of residue＜0.5%; Core permeability injury＜1%.
Claims (3)
1. break-free fracturing fluid; It is characterized in that preparing: 2 parts of organosilicon quaternary ammonium salt monomers, 1 part of 2-hydroxyethyl lauric acid, 0.5 part of SS and 0.5 part of KCl are joined in 96 parts of water by following method; Stirring reaction was prepared from 60 minutes under the speed that PM 500 changes, and can reach 600mPa.s under the said break-free fracturing fluid viscosity normal temperature, and bottom temperature viscosity below 70 ℃ the time can reach 300-600mPa.s; The monomeric preparation method of wherein said organosilicon quaternary ammonium salt is: in the pH value is 9 basic soln; Add 1 part tetraethoxy and 2 parts lauryl amine, through distillation reaction 10 hours, after purification by liquid extraction form.
2. break-free fracturing fluid; It is characterized in that preparing: 5 parts organosilicon quaternary ammonium salt monomers, 2 parts 2-hydroxyethyl 16 carbonic acid or 2-hydroxyethyl 18 carbonic acid, 1 part SS and 2 parts KBr are joined in 90 parts of water by following method; Under the speed that PM 700 changes, mix and be prepared from 40 minutes; Can reach 800mPa.s under the said break-free fracturing fluid viscosity normal temperature; Bottom temperature viscosity in the time of 70 ℃-120 ℃ can reach 300-600mPa.s, and the monomeric preparation method of wherein said organosilicon quaternary ammonium salt is: in the pH value is 11 basic soln, add 2 parts tetraethoxy and 3 parts lauryl amine; Through distillation reaction 12 hours, after purification by liquid extraction form.
3. break-free fracturing fluid; It is characterized in that preparing: 8 parts of organosilicon quaternary ammonium salt monomers, 3 parts of 2-hydroxyethyl 18 carbonic acid, 2 parts of SSs and 3 parts of KCl are joined in 84 parts of water by following method; Under the speed that PM 1000 changes, mix and be prepared from 60 minutes, can reach 1000mPa.s under the said break-free fracturing fluid viscosity normal temperature, viscosity can reach 400-600mPa.s when bottom temperature was 120-150 ℃; The monomeric preparation method of wherein said organosilicon quaternary ammonium salt is: in the pH value is 12 basic soln; Add 3 parts tetraethoxy and 5 parts lauryl amine, through distillation reaction 14 hours, after purification by liquid extraction form.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101362943A (en) * | 2008-09-15 | 2009-02-11 | 青岛生物能源与过程所 | Preparation of novel thermal resistant and shearing resistant clean fracturing fluid thickener by long chain quaternary ammonium salt containing 18-40 carbon number |
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| MX2010006418A (en) * | 2007-12-12 | 2010-11-25 | M I Drilling Fluids Uk Ltd | Invert silicate fluids for wellbore strengthening. |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101362943A (en) * | 2008-09-15 | 2009-02-11 | 青岛生物能源与过程所 | Preparation of novel thermal resistant and shearing resistant clean fracturing fluid thickener by long chain quaternary ammonium salt containing 18-40 carbon number |
Non-Patent Citations (2)
| Title |
|---|
| 吴琼等.FPF清洁无聚携砂液的研制与应用.《钻井液与完井液》.2007,第24卷(第3期),p55-56以及p63、p93. * |
| 赵福麟.采油用化学剂的研究进展.《中国石油大学学报(自然科学版)》.2007,第31卷(第1期),p163-172. * |
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