CN1004138B - Water-base zirconium-gel cleavage liquor - Google Patents
Water-base zirconium-gel cleavage liquor Download PDFInfo
- Publication number
- CN1004138B CN1004138B CN85105344.0A CN85105344A CN1004138B CN 1004138 B CN1004138 B CN 1004138B CN 85105344 A CN85105344 A CN 85105344A CN 1004138 B CN1004138 B CN 1004138B
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- China
- Prior art keywords
- zirconium
- agent
- gel
- concentration
- heavy
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Abstract
The present invention is the compositional refinements that belongs to aqueous fracturing fluid.It has adopted inorganic zirconium compound as linking agent, both can be under alkaline condition, also can under acidic conditions, be cross-linked out the fabulous Zirconium gel of visco-elasticity with gelatinizing agent, this Zirconium gel fracturing liquid viscosity is high, frictional resistance is low, after broken glue without residue, and after aquation, inorganic zirconium compound is a kind of anti-clayswelling agent, the fracturing liquid of this invention is not only applicable to the stratum that clay content is high, and because inorganic zirconium compound is cheaply easy to get, so, fall resistively while meeting or exceeding Borate Gelling Hydrofracturing Fluid at it, its cost can reduce by 18～35%.
Description
The present invention is the compositional refinements that belongs to aqueous fracturing fluid.
Pressure break can make oil well production increasing, intensified injection of wells, and normally used fracturing liquid is divided into two classes, and a class is oil base fracturing fluid, and another kind of is aqueous fracturing fluid.Front class fracturing liquid is applicable to Fractured Oil Well, protection oil reservoir, is specially adapted to the stratum that clay content is high.But its is expensive, and dangerous (inflammable).A rear class fracturing liquid is cheap, safety, as long as formula is proper, can be used for Fractured Oil Well, well.This rear class fracturing liquid mainly refers to water-base gel fracturing fluid, not only viscosity is high for it, frictional resistance is low, can at the appointed time break glue, and after aquation, viscosity is low, be convenient to discharge opeing, its shortcoming is not to be suitable for the stratum that clay content is high, and the especially water-base gel fracturing fluid of alkalescence can make the clay swelling on stratum after broken glue, the rate of permeation that reduces stratum, affects fracturing effect.At the scene, once used all kinds of water-base gel fracturing fluids, as boracium gel, barium frozen glue, chromium gel and aluminium gel, and taking the use of boracium gel as at most.Although this boracium gel is easy to be cross-linked, the frozen glue producing has fabulous visco-elasticity, and gelatinizing agent and linking agent are all cheaply easy to get, but its maximum shortcoming is broken have a large amount of residues after glue, stop up stratum, and the residue (owing to being that alkalescence is crosslinked) after broken glue can cause clay swelling, affects fracturing effect.Since 1971, also used Zirconium gel fracturing liquid at high-temperature stratum abroad, but the linking agent using is expensive organic zirconium.
Object of the present invention is exactly the shortcoming for above-mentioned Borate Gelling Hydrofracturing Fluid, with a kind of novel linking agent, under acidic conditions, polyacrylamide is cross-linked, for the high oil reservoir of pressure break clay content provide a kind of high viscosity, low frictional resistance, can be at the appointed time in broken glue, after aquation, raffinate viscosity is low, without residue, and there is anti-clayswelling performance and the high-quality fracturing liquid with not emulsification of oil.The said novel crosslinker of the present invention refers to basic zirconium chloride (ZrOCl
2), zirconium chloride (ZrCl
4) or zirconium sulfate (Zr(SO
4)
2) etc. inorganic zirconium compound.They can, at the polyacrylamide of the lower crosslinked not hydrolysis of acidic conditions (optimum range pH value is 3～4) or low in hydrolysis degree, produce the good frozen glue of visco-elasticity as boracium gel.This inorganic zirconium compound is (as ZrOCl
2) be linking agent at fracturing liquid during as sand-carrying agent, after broken glue, it is again a kind of anti-clayswelling agent, can effectively suppress clay swelling.
The concentration that linking agent basic zirconium chloride uses is that 0.01～0.05%(is heavy), the concentration of gelatinizing agent polyacrylamide (molecular weight > 3,000,000) is that 0.4～0.8%(is heavy), after crosslinked, it is heavy that the resistance-reducing performance of gained frozen glue all can reach 0.7～0.8%() the index that reaches of sesbania powder-borax frozen glue.And in original formulation, add 0.01～0.05%(heavy) oxygenant (as K
2s
2o
8deng), can make this frozen glue broken glue within the time of specifying.After aquation, in raffinate, without residue, inorganic zirconium compound is now again anti-clayswelling agent.
The concentration above carried is system concentration.
Inorganic zirconium compound is (as ZrOCl
2) be cheaply easy to get, adopt above-mentioned formula not only can reach and exceed the various performances of sesbania powder-borax gelled fracturing fluid, but also can make cost reduce by 18～35%.
Claims (3)
1, a kind of low for raffinate viscosity after broken glue, aquation at the appointed time, without the water-base zirconium-gel cleavage liquor containing inorganic zirconium crosslink agent, polyacrylamide, oxygenant etc. of residue.It is characterized in that: (1) zirconium crosslink agent, concentration is that 0.01～0.05%(is heavy); (2) gelatinizing agent polyacrylamide, concentration is that 0.4～0.8%(is heavy); (3) oxygenant is (as K
2s
2o
6), concentration is that 0.01～0.05%(is heavy).Above-mentioned concentration is system concentration.
2, by aqueous fracturing fluid claimed in claim 1, it is characterized in that zirconium crosslink agent is basic zirconium chloride (ZrOCl
2), zirconium chloride (ZrCl
4) or zirconium sulfate (Zr(SO
4)
2).
3, by aqueous fracturing fluid claimed in claim 1, it is characterized in that the molecular weight that carries out crosslinked gelatinizing agent polyacrylamide under acidic conditions is greater than 3,000,000.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85105344.0A CN1004138B (en) | 1985-07-05 | 1985-07-05 | Water-base zirconium-gel cleavage liquor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85105344.0A CN1004138B (en) | 1985-07-05 | 1985-07-05 | Water-base zirconium-gel cleavage liquor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85105344A CN85105344A (en) | 1986-07-02 |
| CN1004138B true CN1004138B (en) | 1989-05-10 |
Family
ID=4794412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85105344.0A Expired CN1004138B (en) | 1985-07-05 | 1985-07-05 | Water-base zirconium-gel cleavage liquor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1004138B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1323127C (en) * | 2004-09-27 | 2007-06-27 | 克拉玛依新科澳化工有限公司 | High polymer fracturing liquid and preparation thereof |
| CN1329474C (en) * | 2005-06-17 | 2007-08-01 | 甘肃省庆阳长庆井下化工厂 | Alcohol-base fracturing fluid |
| CN100591743C (en) * | 2006-12-29 | 2010-02-24 | 中国科学院长春应用化学研究所 | Composite fracturing fluid |
| CN101220264B (en) * | 2007-12-18 | 2011-02-02 | 中国石油集团川庆钻探工程有限公司 | Method of producing acidic crosslinking agent for CO2 foam compression fracture |
| CN102071004B (en) * | 2010-12-07 | 2013-12-11 | 大庆油田有限责任公司 | Oligomer acidic fracturing fluid |
-
1985
- 1985-07-05 CN CN85105344.0A patent/CN1004138B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85105344A (en) | 1986-07-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| WD01 | Invention patent application deemed withdrawn after publication |