CN102329602A - Ultralow-concentration fracturing fluid and preparation method thereof - Google Patents
Ultralow-concentration fracturing fluid and preparation method thereof Download PDFInfo
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Abstract
The invention relates to an ultralow-concentration fracturing fluid and a preparation method thereof. Currently, a reservoir is reconstructed by adopting a hydraulic fracturing method with the following shortcomings: (1) the rubber crushing residue content in the fracturing fluid is high and is generally 500-600 mg/L; and (2) the using amount of the rubber crushing agent is larger during reconstructing the reservoir and the average using amount is up to about 0.03%. The ultralow-concentration fracturing fluid provided by the invention comprises 93.35-97.4 parts of water, 0.25-0.35 part of hydroxypropyl guar, 1.0-2.0 parts of cross-linking agent, 0.40-2.0 parts of surfactant, 0.20-1.0 part of clay stabilizer, 0.05-0.5 part of bacteriacide and 0.2-0.8 part of temperature resistant reinforcing agent; and the preparation method comprises the following steps of: preparing a solution A in a container; and mixing the solution A and the cross-linking agent according to a volume ratio of 100:1-100:2 so as to form the fracturing fluid. In the fracturing fluid provided by the invention, the concentration of the hydroxypropyl guar as a thickening agent is up to 0.25-0.35%.
Description
Technical field
The present invention relates to a kind of employed ultralow density fracturing liquid of yield-increasing technique that is used for hyposmosis and the transformation of ultra-low penetration gas field reservoir fracturing and preparation method thereof, is that a kind of viscosifying agent hydroxypropyl guar gum concentration that is used for the gas field pressing crack construction is 0.30%～0.35% fracturing liquid system specifically.
Technical background
At present; Long celebrating gas field depth of reservoirs is higher than 3000m, and reservoir temperature reaches more than 90 ℃, mostly adopts the waterfrac treatment mode to carry out reservoir reconstruction; For guaranteeing carrying out smoothly of pressing crack construction; The concentration of viscosifying agent hydroxypropylguar gum is 0.50%～0.55% in the employed water-based fracturing liquid system, have to make seam preferably and take the sand function, but this system is not enough below existing:
1. the broken glue residue content of fracturing liquid system is high, generally at 500～600mg/L.
2. gel breaker large usage quantity during reservoir reconstruction, average dosage reaches about 0.03%.
Above-mentioned factor has influenced the fracturing reform effect to a certain extent.
Summary of the invention
It is ultralow density fracturing liquid of 0.30%～0.35% and preparation method thereof that the technical problem that the present invention solved provides a kind of viscosifying agent concentration that is used for the gas field reservoir reconstruction.
For solving above-mentioned technical problem, the technical scheme that the present invention takes:
A kind of ultralow density fracturing liquid, its special character is: be made up of according to weight part following material:
93.35～97.4 parts in water
0.25～0.35 part of hydroxypropylguar gum
1.0～2.0 parts of linking agents
0.40～2.0 part in tensio-active agent
0.20～1.0 part of clay stabilizer
0.05～0.5 part in sterilant
0. 2～0.8 part of heatproof toughener.
Above-mentioned linking agent adopts inorganic borate crosslinker.
Above-mentioned tensio-active agent is for being used for reducing hydro carbons emulsifying agent, alkyl sulfonates emulsifying agent, the alkylsurfuric acid salt emulsifying agent of the water and the IT of oil in water.
Above-mentioned clay stabilizer adopts the quaternary ammonium salt type.
The clay stabilizer of above-mentioned quaternary ammonium salt type adopts with trimethylammonium tertiary amine and hydrochloride and the synthetic trimethylammonium hydroxypropyl quaternary ammonium salt clay stabilizer that generates of epichlorohydrin reaction.
Above-mentioned sterilant adopts dodecyl benzyl dimethyl ammonium chloride or RH-893.
Above-mentioned heatproof toughener adopts organic bases.
Above-mentioned heatproof toughener adopts 1% pH value of water solution greater than 13 organic bases.
Above-mentioned heatproof toughener adopts Monoethanolamine MEA BASF, trolamine, quadrol.
The of the fracturing fluid preparation method of a kind of ultralow density, its special character is: described preparation method realizes through following steps:
(1), the preparation of solution A: in container, add entry; Under with pump circulation or whisking appliance condition of stirring; Slowly add hydroxypropylguar gum, add tensio-active agent, clay stabilizer, sterilant, heatproof toughener then respectively, continue to circulate or stirred 30 minutes; Make liquid mixing abundant, form solution A;
(2), when pump is annotated solution A, with solution A and linking agent, mix the formation fracturing liquid according to the volume ratio of solution A: linking agent=100:1 ~ 100:2.
Compared with prior art, beneficial effect of the present invention:
1, viscosifying agent hydroxypropyl guar gum concentration is reduced to 0.25～0.35% in the fracturing liquid system.
2,, make the viscosifying agent solution of ultralow density can be used for the pressing crack construction in long celebrating gas field through adopting high performance linking agent.
Description of drawings
Fig. 1 is a heat resistance graphic representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is elaborated.
The present invention is made up of according to weight part following material:
93.35～97.4 parts in water
0.25～0.35 part of hydroxypropylguar gum
1.0～2.0 parts of linking agents
0.40～2.0 part in tensio-active agent
0.20～1.0 part of clay stabilizer
0.05～0.5 part in sterilant
0. 2～0.8 part of heatproof toughener
Above-mentioned linking agent adopts inorganic borate crosslinker.
Above-mentioned tensio-active agent is for being used for reducing hydro carbons emulsifying agent, alkyl sulfonates emulsifying agent, the alkylsurfuric acid salt emulsifying agent of the water and the IT of oil in water.
Above-mentioned clay stabilizer adopts the quaternary ammonium salt type,
The clay stabilizer of above-mentioned quaternary ammonium salt type adopts with trimethylammonium tertiary amine and hydrochloride and the synthetic trimethylammonium hydroxypropyl quaternary ammonium salt clay stabilizer that generates of epichlorohydrin reaction.
Above-mentioned sterilant adopts dodecyl benzyl dimethyl ammonium chloride or RH-893.
Above-mentioned heatproof toughener adopts organic bases.
Above-mentioned heatproof toughener adopts 1% pH value of water solution greater than 13 organic bases.
Above-mentioned heatproof toughener adopts Monoethanolamine MEA BASF, trolamine, quadrol.
Preparing method of the present invention realizes through following steps:
(1), the preparation of solution A: in container, add entry; Add entry, under with pump circulation or whisking appliance condition of stirring, slowly add hydroxypropylguar gum; Add tensio-active agent, clay stabilizer, sterilant, heatproof toughener then respectively; Continue to circulate or stirred 30 minutes, make liquid mixing abundant, form solution A;
(2), when pump is annotated solution A, with solution A and linking agent, mix the formation fracturing liquid according to the volume ratio of solution A: linking agent=100:1 ~ 100:2.
Embodiment 1: join by following consumption and get each material:
93.35 parts in water
0.25 part of hydroxypropylguar gum
1.0 parts of inorganic borate crosslinkers
0.4 part of hydro carbons emulsifying agent
0.2 part of trimethylammonium hydroxypropyl quaternary ammonium salt clay stabilizer
0.05 part of dodecyl benzyl dimethyl ammonium chloride
0. 2 parts of Monoethanolamine MEA BASFs
The material of above-mentioned batching is prepared through following steps:
(1), the preparation of solution A: in container, add entry; Add entry, under with pump circulation or whisking appliance condition of stirring, slowly add hydroxypropylguar gum; Add hydro carbons emulsifying agent, trimethylammonium hydroxypropyl quaternary ammonium salt clay stabilizer, dodecyl benzyl dimethyl ammonium chloride, Monoethanolamine MEA BASF then respectively; Continue to circulate or stirred 30 minutes, make liquid mixing abundant, form solution A;
(2), when pump is annotated solution A, with solution A and inorganic borate crosslinker, according to solution A: the volume ratio of inorganic borate crosslinker=100:1 is mixed the formation fracturing liquid.
Embodiment 2: join by following consumption and get each material:
95.375 parts in water
0.3 part of hydroxypropylguar gum
1.5 parts of inorganic borate crosslinkers
1.2 parts of alkyl sulfonates emulsifying agents
0.6 part of trimethylammonium hydroxypropyl quaternary ammonium salt clay stabilizer
0.275 part of RH-893
0.5 part of trolamine
The material of above-mentioned batching is prepared through following steps:
(1), the preparation of solution A: in container, add entry; Add entry, under with pump circulation or whisking appliance condition of stirring, slowly add hydroxypropylguar gum; Add alkyl sulfonates emulsifying agent, trimethylammonium hydroxypropyl quaternary ammonium salt clay stabilizer, RH-893, trolamine then respectively; Continue to circulate or stirred 30 minutes, make liquid mixing abundant, form solution A;
(2), when pump is annotated solution A, with solution A and inorganic borate crosslinker, according to solution A: the volume ratio of inorganic borate crosslinker=100:1.5 is mixed the formation fracturing liquid.
Embodiment 3: join by following consumption and get each material:
97.4 parts in water
0.35 part of hydroxypropylguar gum
2.0 parts of inorganic borate crosslinkers
2.0 parts of alkylsurfuric acid salt emulsifying agents
1.0 parts of trimethylammonium hydroxypropyl quaternary ammonium salt clay stabilizers
0.5 part of dodecyl benzyl dimethyl ammonium chloride
0.8 part of quadrol
The material of above-mentioned batching is prepared through following steps:
(1), the preparation of solution A: in container, add entry; Add entry, under with pump circulation or whisking appliance condition of stirring, slowly add hydroxypropylguar gum; Add alkylsurfuric acid salt emulsifying agent, trimethylammonium hydroxypropyl quaternary ammonium salt clay stabilizer, alkylsurfuric acid salt emulsifying agent, quadrol then respectively; Continue to circulate or stirred 30 minutes, make liquid mixing abundant, form solution A;
(2), when pump is annotated solution A, with solution A and inorganic borate crosslinker, according to solution A: the volume ratio of inorganic borate crosslinker=100:2 is mixed the formation fracturing liquid.
Experimental data:
Following test item detects according to SY-T 5107-2005 " aqueous fracturing fluid method of evaluating performance " examination criteria.
One, base fluid:
According to each material of embodiment 2 proportionings.
Two, TP
Base fluid and linking agent JL-9 carry out the heatproof test according to the crosslinked rear section of 100:1.5, get a part of crosslinked gel and ammonium persulphate again and break its breaking glue solution performance of glue after-filtration survey.
Three, performance
1, heat resistance is referring to Fig. 1.
2, breaking glue solution performance evaluation.
| Project | Surface tension (mN/m) | Anti-swollen ability |
| Breaking glue solution behind the frozen glue | 27.94 | 85.6% |
3, residue content: 155mg/L.
Four, conclusion
Through above test contrast, can find out that the ultralow density fracturing liquid need not to add tensio-active agent etc. and itself possesses the function that reduces surface tension, prevents clay swelling, and is better than conventional guanidine glue temperature tolerance simultaneously.
Claims (10)
1. ultralow density fracturing liquid is characterized in that: be made up of according to weight part following material:
93.35～97.4 parts in water
0.25～0.35 part of hydroxypropylguar gum
1.0～2.0 parts of linking agents
0.40～2.0 part in tensio-active agent
0.20～1.0 part of clay stabilizer
0.05～0.5 part in sterilant
0. 2～0.8 part of heatproof toughener.
2. a kind of ultralow density fracturing liquid according to claim 1, it is characterized in that: described linking agent adopts inorganic borate crosslinker.
3. a kind of ultralow density fracturing liquid according to claim 1 and 2 is characterized in that: described tensio-active agent is for being used for reducing hydro carbons emulsifying agent, alkyl sulfonates emulsifying agent, the alkylsurfuric acid salt emulsifying agent of the water and the IT of oil in water.
4. a kind of ultralow density fracturing liquid according to claim 3 is characterized in that: described clay stabilizer adopts the quaternary ammonium salt type.
5. a kind of ultralow density fracturing liquid according to claim 4 is characterized in that: the clay stabilizer of described quaternary ammonium salt type adopts with trimethylammonium tertiary amine and hydrochloride and the synthetic trimethylammonium hydroxypropyl quaternary ammonium salt clay stabilizer that generates of epichlorohydrin reaction.
6. a kind of ultralow density fracturing liquid according to claim 5 is characterized in that: described sterilant adopts dodecyl benzyl dimethyl ammonium chloride or RH-893.
7. a kind of ultralow density fracturing liquid according to claim 6 is characterized in that: described heatproof toughener adopts organic bases.
8. a kind of ultralow density fracturing liquid according to claim 7 is characterized in that: described heatproof toughener adopts 1% pH value of water solution greater than 13 organic bases.
9. a kind of ultralow density fracturing liquid according to claim 8 is characterized in that: described heatproof toughener adopts Monoethanolamine MEA BASF, trolamine, quadrol.
10. any of the fracturing fluid preparation method of described a kind of ultralow density who requires according to aforesaid right is characterized in that: described preparation method realizes through following steps:
(1), the preparation of solution A: in container, add entry; Under with pump circulation or whisking appliance condition of stirring; Slowly add hydroxypropylguar gum, add tensio-active agent, clay stabilizer, sterilant, heatproof toughener then respectively, continue to circulate or stirred 30 minutes; Make liquid mixing abundant, form solution A;
(2), when pump is annotated solution A, with solution A and linking agent, mix the formation fracturing liquid according to the volume ratio of solution A: linking agent=100:1 ~ 100:2.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102676148A (en) * | 2012-05-25 | 2012-09-19 | 西南石油大学 | High-density low-friction fracturing fluid |
| CN102757777A (en) * | 2012-06-21 | 2012-10-31 | 中国石油天然气股份有限公司 | Inhibition water-locking type high-temperature-resistant fracturing fluid for fracturing of dense gas reservoir |
| CN104893705A (en) * | 2015-04-09 | 2015-09-09 | 西南石油大学 | Boron cross-linking agent and boron crosslinking fracturing fluid used for high temperature deep well |
| CN105198757A (en) * | 2015-10-15 | 2015-12-30 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Small cationic bisquaternary ammonium salt clay stabilizer and preparation method thereof |
| CN105384845A (en) * | 2014-09-05 | 2016-03-09 | 中国石油化工股份有限公司 | Etherification modified sodium alginate and preparation method thereof, water-based jelly fracturing fluid containing etherification modified sodium alginate, and applications of water-based jelly fracturing fluid containing etherification modified sodium alginate |
| CN104046347B (en) * | 2013-03-12 | 2017-03-01 | 中国石油化工股份有限公司 | A kind of hydroxypropyl guar fracturing fluid synergist, preparation method and application |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102102013A (en) * | 2009-12-18 | 2011-06-22 | 中国石油天然气股份有限公司 | Inorganic boron high-temperature time-delay fracturing fluid |
-
2011
- 2011-08-03 CN CN 201110221055 patent/CN102329602A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102102013A (en) * | 2009-12-18 | 2011-06-22 | 中国石油天然气股份有限公司 | Inorganic boron high-temperature time-delay fracturing fluid |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102676148A (en) * | 2012-05-25 | 2012-09-19 | 西南石油大学 | High-density low-friction fracturing fluid |
| CN102757777A (en) * | 2012-06-21 | 2012-10-31 | 中国石油天然气股份有限公司 | Inhibition water-locking type high-temperature-resistant fracturing fluid for fracturing of dense gas reservoir |
| CN102757777B (en) * | 2012-06-21 | 2014-04-02 | 中国石油天然气股份有限公司 | Inhibition water-locking type high-temperature-resistant fracturing fluid for fracturing of dense gas reservoir |
| CN104046347B (en) * | 2013-03-12 | 2017-03-01 | 中国石油化工股份有限公司 | A kind of hydroxypropyl guar fracturing fluid synergist, preparation method and application |
| CN105384845A (en) * | 2014-09-05 | 2016-03-09 | 中国石油化工股份有限公司 | Etherification modified sodium alginate and preparation method thereof, water-based jelly fracturing fluid containing etherification modified sodium alginate, and applications of water-based jelly fracturing fluid containing etherification modified sodium alginate |
| CN104893705A (en) * | 2015-04-09 | 2015-09-09 | 西南石油大学 | Boron cross-linking agent and boron crosslinking fracturing fluid used for high temperature deep well |
| CN104893705B (en) * | 2015-04-09 | 2018-02-16 | 西南石油大学 | A kind of borate crosslinker and the boron crosslinked fracturing fluid for being applied to high temperature deep well for preparing |
| CN105198757A (en) * | 2015-10-15 | 2015-12-30 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Small cationic bisquaternary ammonium salt clay stabilizer and preparation method thereof |
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Application publication date: 20120125 |