CN103215027B - A kind of Acidic surfactant fracture liquid system - Google Patents
A kind of Acidic surfactant fracture liquid system Download PDFInfo
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- CN103215027B CN103215027B CN201210016576.8A CN201210016576A CN103215027B CN 103215027 B CN103215027 B CN 103215027B CN 201210016576 A CN201210016576 A CN 201210016576A CN 103215027 B CN103215027 B CN 103215027B
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Abstract
The present invention relates to a kind of Acidic surfactant fracture liquid system, by cetyl trimethylammonium bromide, Potassium Hydrogen Phthalate, hydrochloric acid, hydrofluoric acid and water by weight percentage 2.0 ~ 5.0%: 0.5 ~ 2.5%: 10 ~ 20%; 0.1 ~ 1.5%, all the other are water composition; This fracturing fluid system is applicable to 40 DEG C ~ 60 DEG C reservoirs, can carry out acidification to dispel block and sandfrac, and after pressing crack construction, this fracturing fluid system is by local water or the broken glue of organic fluid dilution.
Description
Technical field
The present invention relates to a kind of acidification of oil gas well pressure break Acidic surfactant fracture liquid system.
Background technology
Current fracturing liquid mainly adopts vegetable jelly to make thickening material, be cross-linked with linking agent under suitable condition, form the polymer reticulated structure with certain viscosity, this kind of of the fracturing fluid broken glue must adopt chemical gel breaker, destroy polymer reticulated structure, reach brokenly glue object.Cull after the insolubles of vegetable jelly self and broken glue damages the rate of permeation in denture crack and zone permeability, affects fracturing yield increasing effect.
Twentieth century end, Schlumberger company develops the fracturing liquid that thickening material made by a kind of tensio-active agent, the tensio-active agent that this tensio-active agent pressure break leaf system uses is the main cation compound containing chain alkyl, with the use of salt be certain Organic Sodium Salt or inorganic salt (as KCl), tensio-active agent used not only has small-molecular-weight, and have higher molecular weight, not only have cationic, and have other type, used salt also relates to multiple organic and inorganic salt, without residue after broken glue, little to bottom injury, this fracturing fluid system receives very big concern.
The surfactant fracturing fluid of patent 200310116815.8 invention is made up of the unsaturated fatty acids of 18 carbon or unsaturated fatty acid salt, and supplementary additive is mineral alkali and inorganic salt, and this system is strong basicity.Add sand carry out simultaneously for realizing acidifying, acid surfactant fracturing fluid need be developed.
The object of the present invention is to provide a kind of effective means, utilize specific quaternary surfactant, inorganic salt, acid and water mixing, in water, this quaternary surfactant forms the rod-like micelles of entanglement and increases fluid viscosity and visco-elasticity in certain density hydrochloric acid and salts solution, requirement to fracturing liquid viscosity when realizing pressure break, this fracturing liquid is formed in certain hydrochloric environment, has certain souring ability.When this acid surface active agent fracturing liquid carries out acid fracturing to oil and water well, fracturing liquid de-plugging can penetrate greasy filth band and has certain dissolving power to the shale in greasy filth band while taking sand, reaches the object of fracture acidizing.Simultaneously acid surface active agent fracturing liquid can also by improve weary acid to the carrying capacity of particulate, keep stratum water-wet and the row of helping to act on the secondary pollution reducing acidization.
Summary of the invention
The object of this invention is to provide a kind of acidification of oil gas well pressure break Acidic surfactant fracture liquid system.
A kind of acidification of oil gas well pressure break Acidic surfactant fracture liquid system of the present invention is realized by following formula:
The system that acid surface active agent fracturing liquid is made up of cetyl trimethylammonium bromide, Potassium Hydrogen Phthalate, hydrochloric acid, hydrofluoric acid and water, the mass content of each component is respectively cetyl trimethylammonium bromide 2.0% ~ 5.0%, Potassium Hydrogen Phthalate 0.5% ~ 2.5%, hydrochloric acid 10 ~ 20%, hydrofluoric acid 0.1 ~ 1.5%, all the other compositions are water.
The acting as of main component in acid surface active agent fracturing liquid:
1. cetyl trimethylammonium bromide
Cetyl trimethylammonium bromide is one of of the fracturing fluid main component of acid surface active agent, in water and acid, have good solvability, and its Main Function forms the row of helping after micella and fracture acidizing operation.
2. Potassium Hydrogen Phthalate
Potassium Hydrogen Phthalate solvability in water and acid is better, and itself and cetyl trimethylammonium bromide interact and impel tensio-active agent to form micella, make formed micella can take sand and deep acidizing.
3. hydrochloric acid and hydrofluoric acid
The acidity that hydrochloric acid and hydrofluoric acid mainly make acid surface active agent fracturing liquid keep certain, plays the effect of acidification to dispel block, the siliceous reservoir of corrosion.
This fracturing fluid system is applicable to 40 DEG C ~ 60 DEG C reservoirs, can carry out acidification to dispel block and sandfrac, and after pressing crack construction, this fracturing fluid system is by local water or the broken glue of organic fluid dilution.
Accompanying drawing explanation
This fracturing liquid of Fig. 1 at 60 DEG C, 170S
-1the anti-shearing characteristic of heatproof.
Embodiment
Embodiment 1:
Under normal temperature 25 DEG C of conditions, 2.2g cetyl trimethylammonium bromide, 0.8g Potassium Hydrogen Phthalate are added to the water successively and stir.Then slowly add the hydrochloric acid 30ml of 37% under agitation, and hydrofluoric acid 0.1% mixture add after continue stirring again 5 minutes, the acid surface active agent fracturing liquid that initial viscosity is 40mPas can be made into.This fracturing liquid is at 60 DEG C, and the anti-shearing characteristic of heatproof of 170S-1 is shown in Fig. 1.
This fracturing liquid, at 60 DEG C, mixes with the water of 1: 1, and after broken glue, breaking glue solution viscosity is 2.4mPs, and surface tension is 22mN/m.
Embodiment 2:
Prepare acid surfactant fracturing fluid according to above-mentioned steps, difference is cetyl trimethylammonium bromide consumption is 5.0g, and the acid surface active agent fracturing liquid initial viscosity be made into is 80mPas.
Embodiment 3:
Prepare acid surfactant fracturing fluid according to above-mentioned steps, difference Potassium Hydrogen Phthalate consumption is 2.5g, and the acid surface active agent fracturing liquid initial viscosity be made into is 60mPas.
Claims (4)
1. an Acidic surfactant fracture liquid system, is characterized in that: this Acidic surfactant fracture liquid system by cetyl trimethylammonium bromide, Potassium Hydrogen Phthalate, hydrochloric acid, hydrofluoric acid and water by weight percentage 2.0 ~ 5.0%, 0.5 ~ 2.5%, 10 ~ 20%, 0.1 ~ 1.5%, all the other form for water.
2. acid surface active agent fracturing liquid according to claim 1, is characterized in that: described cetyl trimethylammonium bromide is white crystal, and its molecular weight is 364.5.
3. acid surface active agent fracturing liquid according to claim 1, is characterized in that: described Potassium Hydrogen Phthalate is white crystal, and its molecular weight is 204.22.
4. acid surface active agent fracturing liquid according to claim 1, is characterized in that: described hydrochloric acid is technical hydrochloric acid, and density is 1.17g/cm3, and hydrofluoric acid is industrial goods, density 1.15 ~ 1.18g/cm3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210016576.8A CN103215027B (en) | 2012-01-18 | 2012-01-18 | A kind of Acidic surfactant fracture liquid system |
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| CN201210016576.8A CN103215027B (en) | 2012-01-18 | 2012-01-18 | A kind of Acidic surfactant fracture liquid system |
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| CN103215027B true CN103215027B (en) | 2015-09-23 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105713593A (en) * | 2014-08-12 | 2016-06-29 | 成都能生材科技开发有限责任公司 | Method for preparing fracturing fluid SSE for ultralow temperature supercooling contraction and enlarging nano pore seam |
| CN105331353A (en) * | 2014-08-12 | 2016-02-17 | 成都能生材科技开发有限责任公司 | Method for preparing SCD capable of sub-cooling and liquefying flammable ice, reducing pressure and freezing point of nano pore seam |
| CN109722234A (en) * | 2017-10-31 | 2019-05-07 | 中国石油天然气股份有限公司 | A kind of acidic fracturing fluid and preparation method thereof |
| CN108102633B (en) * | 2017-11-17 | 2020-10-09 | 中国石油天然气股份有限公司 | Viscoelastic acid-based fracturing fluid and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102453480A (en) * | 2010-10-22 | 2012-05-16 | 中国石油天然气集团公司 | Clean viscous acid for acid fracturing of carbonate reservoir |
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| CN102311728B (en) * | 2010-07-06 | 2014-04-02 | 中国石油天然气股份有限公司 | Chemical pressure-reducing injection-increasing agent for injection well and preparation and use thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102453480A (en) * | 2010-10-22 | 2012-05-16 | 中国石油天然气集团公司 | Clean viscous acid for acid fracturing of carbonate reservoir |
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