CN103275689A - Association fracturing fluid densifier and preparation method thereof - Google Patents
Association fracturing fluid densifier and preparation method thereof Download PDFInfo
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- CN103275689A CN103275689A CN2013101488145A CN201310148814A CN103275689A CN 103275689 A CN103275689 A CN 103275689A CN 2013101488145 A CN2013101488145 A CN 2013101488145A CN 201310148814 A CN201310148814 A CN 201310148814A CN 103275689 A CN103275689 A CN 103275689A
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Abstract
The invention discloses an association fracturing fluid densifier and a preparation method thereof and relates to the field of assistants for petroleum exploitation. At a temperature of 70 to 80 DEG C, the association fracturing fluid densifier is prepared by crosslinking mixing of a base solution system and a crosslinking agent system, wherein a ratio of the base solution system to the crosslinking agent system is 50: 1. The association fracturing fluid densifier solves the problems of crosslinking difficulty, poor temperature toleration after crosslinking, and gel breaking difficulty of the common polymers. Polymers are aggregated by hydrophobic effects of hydrophobic groups of the polymers so that the large molecular chains are subjected to intramolecular and intermolecular association and a supramolecular structure-dynamic physical crosslinking network obtained mainly by intermolecular association is formed. Therefore, solution viscosity and elasticity are greatly improved. Through introduction of the ionic groups crosslinked easily, the polymers are crosslinked and form jelly which can be picked up and has high elasticity. Compared with the conventional guanidine gum fracturing fluid, a fracturing fluid with the association fracturing fluid densifier contains less additives, can be prepared simply and can be preserved for a long time. The association fracturing fluid densifier has almost no substance undissolved by water, has low fracturing fluid residue content, produces small damage on stratum and prop-fractures, and improves sand fracturing effects.
Description
Technical field
The present invention relates to the oil production used additives, be specifically related to a kind of in the oil production process waterfrac treatment association fracturing fluid gelatinizer.
Background technology
As everyone knows, waterfrac treatment is for the technical measures that improve low permeability hydrocarbon zone throughput.Used fracturing liquid must have high viscosity, high anti-shear ability, the high-strength characteristics such as the feature of environmental protection of taking husky performance and the low residue of broken glue during pressure break.High viscosity makes the crack reach required width and the degree of depth so that it makes seam.Wherein, thickening material is the host of aqueous fracturing fluid, in order to improve of the fracturing fluid viscosity, falls leak-off, suspends and carries propping agent.
Present most of fracturing liquid is to belong to water base natural plant and derivative thereof, as guar gum, fenugreek gum, derivatived cellulose etc.The greatest problem of water-based fracturing liquid system is the injury water-sensitive strata, and this is because the loss of the flow conductivity that residue, not broken glue and filter cake etc. cause.The hydroxypropylguar gum of Chu Xianing, hydroxyethyl guar gum and carboxymethyl guar glue and hydroxyalkyl cationic guar gum such as hydroxypropyl-trimethyl ammonium chloride and hydroxypropylguar gum have in various degree application, particularly hydroxypropylguar gum at oil field compression fracture in recent years.Comparatively speaking, the residue content of these plant gum fracturing fluids is higher, after the fracturing liquid operation of making, the flow conductivity of zone permeability, sand packed fracture etc. is all had injury, hinders the unimpeded outflow of oil gas, influences production efficiency; Moreover, these rubber powders when dissolving instantly-soluble can be relatively poor, play flake easily and influence construction quality.So developing vegetable jelly pressure break thickening material instant and that have than strong tackifying ability and heatproof, anti-salt, shear resistant and low level of residue is emphasis and the difficult point of fracturing liquid area research.
In sum, this area lacks a kind of instant and have a vegetable jelly pressure break thickening material of strong tackifying ability and heatproof, anti-salt, shear resistant and low level of residue.Therefore, it is instant and have the vegetable jelly pressure break thickening material of strong tackifying ability and heatproof, anti-salt, shear resistant and low level of residue and contain the fracturing liquid of described thickening material that this area presses for exploitation.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of low injury, slightly acidic, elastomeric association fracturing fluid gelatinizer.
Technical problem to be solved by this invention realizes by the following technical solutions:
A kind of association fracturing fluid gelatinizer, fracturing fluid gelatinizer is by the base fluid system with the linking agent system is crosslinked mixes in 70-80 ℃ of environment, and the proportioning of base fluid system and linking agent system is 50:1.
Described base fluid system is made of 0.3-0.4% viscosifying agent ZX-108 pulvis and 90-99.7% water;
Described base fluid system configurations method is as follows:
1) in the clear water jar, adds water;
2) start on-the-spot jet liquid dispensing device;
3) viscosifying agent ZX-108 pulvis is added in the material bin, opens the suction valve earlier, after open reinforced valve, by jet-pump, make viscosifying agent ZX-108 add liquid with water and irritate in the car;
4) not having to want whole process to carry out suction under circulation or the condition of stirring, material in tank is mixed;
5) if circulation or stirring system are arranged, once circulate and stirred about 5 minutes, material in tank is mixed get final product;
Described linking agent system is made up of following components in weight percentage,
Linking agent 20-30%
Cleanup additive 12-13%
Surplus is water.
Described linking agent is linking agent ZX-100.
Described cleanup additive is cleanup additive ZX-30.
Described linking agent system compound method is: add linking agent ZX-100 major ingredient in the time of at first earlier, add water again, add cleanup additive ZX-30 at last.
Described viscosifying agent ZX-108, linking agent ZX-100 and cleanup additive ZX-30 adopt the feed composition of third party's preparation.
The technical scheme that the present invention also has is, a kind of association fracturing fluid gelatinizer, and fracturing fluid gelatinizer is by the base fluid system and the linking agent system is crosslinked mixes in 90-100 ℃ of environment, the proportioning of base fluid system and linking agent system is 50:1;
Described base fluid system is made of viscosifying agent ZX-108 pulvis;
Described linking agent system is made of 25%-35% linking agent ZX-100 and 12%-18% cleanup additive ZX-30 and 47%-63% water.
Described viscosifying agent ZX-108, linking agent ZX-100 and cleanup additive ZX-30 adopt the feed composition of third party's preparation.
Association fracturing fluid gelatinizer of the present invention has improved the problem of general polymer crosslinked difficulty, poor, the broken glue difficulty of crosslinked back heat resistance.Polymkeric substance is assembled by the hydrophobic interaction of its hydrophobic grouping, makes macromolecular chain produce intramolecularly and intermolecular association, forms the supramolecular structure-dynamic physical cross-linked network based on intermolecular association, and the viscosity of solution, elasticity are raise significantly.Owing to introduced easy crosslinked ionic group, make crosslinked polymer, formation frozen glue that can hang, higher elasticity simultaneously.Compare with conventional guanidine gum fracturing fluid, the additive types of use few (not needing the adjustment of pH value, sterilant etc.), preparation is simple, and the shelf time is long.Viscosifying agent contains water-insoluble hardly, and of the fracturing fluid residue content is low, and is little to the injury of stratum and supporting crack, raising added the effect of sand.What linking agent was trapezoidal is slightly acidic, is particularly suitable for the pressure break on the quick stratum of alkali.
The invention has the beneficial effects as follows:
1. residue content is low after having no water-insoluble, broken glue, has reduced the injury to supporting crack flow conductivity, rate of permeation;
2. adopt the acidic crosslinking agent of non-chromium class, reduce the pollution to environment;
3. the breaking glue solution viscosity is lower than 3mPa.s, is conducive to the row of returning;
4. crosslinked gel has higher elasticity, can control the crack longitudinal extension.
Embodiment
For technique means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with specific embodiment, further set forth the present invention.
Embodiment 1
A kind of association fracturing fluid gelatinizer, the fracturing fluid gelatinizer that uses in 70-80 ℃ of environment are by the base fluid system and the linking agent system is crosslinked mixes, and the proportioning of base fluid system and linking agent system is 50:1.
Wherein the base fluid system is made of 0.35% viscosifying agent ZX-108 pulvis and 99.65% water, and its compound method is as follows,
1) topped up with water in the clear water jar;
2) start on-the-spot jet liquid dispensing device;
3) viscosifying agent ZX-108 pulvis is added in the material bin, opens the suction valve earlier, after open reinforced valve, by jet-pump, make viscosifying agent add liquid with water and irritate in the car;
4) not having to want whole process to carry out suction under circulation or the condition of stirring, material in tank is mixed;
5) if circulation or stirring system are arranged, once circulate and stirred about 5 minutes, material in tank is mixed;
Precaution:
A. to check before the dosing whether tank truck cleans, have or not raffinate to exist;
When B. powder was inhaled in dosing, it is stable that the jet-pump flow velocity will keep, uninterrupted.
The linking agent system is made of 25% linking agent ZX-100,12.5% cleanup additive ZX-30 and 62.5% water, adds linking agent ZX-100 major ingredient during preparation earlier, adds water again, adds cleanup additive ZX-30 at last.
Precaution:
A. will check before the dosing whether tank truck cleans, have or not raffinate to exist, the pH value is neutral;
B. free of contamination well water and tap water.
Embodiment 2
The fracturing fluid gelatinizer that uses in 90-100 ℃ of environment is by the base fluid system and the linking agent system is crosslinked mixes, and the proportioning of base fluid system and linking agent system is 50:1.
Wherein the base fluid system is made of 0.4% viscosifying agent ZX-108 pulvis and 99.6% water, and its compound method is as follows,
1) topped up with water in the clear water jar;
2) start on-the-spot jet liquid dispensing device;
3) viscosifying agent ZX-108 pulvis is added in the material bin, opens the suction valve earlier, after open reinforced valve, by jet-pump, make viscosifying agent add liquid with water and irritate in the car;
4) not having to want whole process to carry out suction under circulation or the condition of stirring, material in tank is mixed;
5) if circulation or stirring system are arranged, once circulate and stirred about 5 minutes, material in tank is mixed;
The linking agent system is made of 30% linking agent ZX-100,15% cleanup additive ZX-30 and 55% water, adds linking agent ZX-100 major ingredient during preparation earlier, adds water again, adds cleanup additive ZX-30 at last.
1. the association fracturing liquid adapts to the scope of reservoir temperature
By the indoor test evaluation of fracturing fluid gelatinizer of the present invention being carried out the anti-cutting performance of heatproof, fracturing liquid of the present invention ties up to and satisfies SY/T6376-2008 fracturing liquid general technical specifications standard under 40-100 ℃, determined the scope of the crosslinked ratio of effective production of effective base fluid concentration thus, provide and effectively take grittiness and can ensure for entering field conduct.
2. the kind of additive in the formula system
The present invention is associated and is added with in the fracturing fluid gelatinizer: fracturing fluid gelatinizer, linking agent, help the connection agent.
In the guanidine gum fracturing fluid there be additive: viscosifying agent, linking agent, breakdown of emulsion cleanup additive, expansion-resisting agent (organic and inorganic two kinds), pH value conditioning agent, sterilant etc.
3. core damage is tested and comprehensive performance evaluation
Guanidine gum fracturing fluid and association fracturing liquid are carried out core damage test and comprehensive performance evaluation, the results are shown in Table 1.
The of the fracturing fluid comprehensive performance evaluation of table 1
As can be seen from Table 1, the of the fracturing fluid over-all properties fracturing liquid that associates is low to the injury that supporting crack causes; Reach with the interfacial tension of oil all very low with the surface tension of rock; Clay is anti-swollen effective, reduces the probability of stopping up pore throat; The anti-cutting performance of heatproof is good, can still keep high viscosity reservoir temperature down cut 1 hour; Residue content is low, has reduced the injury to supporting crack flow conductivity and rate of permeation.
4. the minimum index of different ingredients system fracturing liquid performance
The on-the-spot MPC minimum performance criterion of using of association fracturing liquid different ingredients system fracturing liquid is as shown in table 2.
The minimum index of table 2 fracturing liquid performance
5. different ingredients system fracturing liquid rubber-breaking agent consumption design (must mark the gel breaker type)
The on-the-spot MPC minimum performance criterion of using of association fracturing liquid different ingredients system fracturing liquid is as shown in table 3.
The broken glue situation of the different well temperature of table 3 association fracturing liquid
6. association fracturing liquid and guanidine gum fracturing fluid performance comparison, the specific performance index is as shown in table 4.
Table 4 association fracturing liquid and guanidine gum fracturing fluid performance comparison
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in above-described embodiment and the specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (10)
1. association fracturing fluid gelatinizer is characterized in that: fracturing fluid gelatinizer is by the base fluid system with the linking agent system is crosslinked mixes in 70-80 ℃ of environment, and the proportioning of base fluid system and linking agent system is 50:1.
2. association fracturing fluid gelatinizer according to claim 1, it is characterized in that: described base fluid system is made of 0.3-0.4% viscosifying agent pulvis and 90-99.7% water.
3. association fracturing fluid gelatinizer according to claim 2, it is characterized in that: described viscosifying agent pulvis is viscosifying agent ZX-108, described viscosifying agent ZX-108 adopts the feed composition of third party's preparation.
4. association fracturing fluid gelatinizer according to claim 2, it is characterized in that: described base fluid system configurations method is as follows:
A) in the clear water jar, add water;
B) start on-the-spot jet liquid dispensing device;
C) viscosifying agent is added in the material bin, opens the suction valve earlier, after open reinforced valve, by jet-pump, make viscosifying agent add liquid with water and irritate in the car;
D) not having to want whole process to carry out suction under circulation or the condition of stirring, material in tank is mixed;
E) if circulation or stirring system are arranged, once circulate and stirred 5 minutes, material in tank is mixed get final product.
5. association fracturing fluid gelatinizer according to claim 1, it is characterized in that: described linking agent system is made up of following components in weight percentage,
Linking agent 20-30%
Cleanup additive 12-13%
Surplus is water;
Described linking agent system compound method is: add the linking agent major ingredient in the time of at first earlier, add water again, add cleanup additive at last.
6. association fracturing fluid gelatinizer according to claim 5, it is characterized in that: described linking agent is linking agent ZX-100, and described cleanup additive is cleanup additive ZX-30, and described linking agent ZX-100 and cleanup additive ZX-30 adopt the feed composition of third party's preparation.
7. association fracturing fluid gelatinizer is characterized in that: fracturing fluid gelatinizer is by the base fluid system and the linking agent system is crosslinked mixes in 90-100 ℃ of environment, and the proportioning of base fluid system and linking agent system is 50:1.
8. association fracturing fluid gelatinizer according to claim 6, it is characterized in that: described base fluid system is made of the viscosifying agent pulvis.
9. association fracturing fluid gelatinizer according to claim 7, it is characterized in that: described viscosifying agent pulvis is viscosifying agent ZX-108, described viscosifying agent ZX-108 adopts the feed composition of third party's preparation.
10. association fracturing fluid gelatinizer according to claim 6 is characterized in that: described linking agent system is made of 25%-35% linking agent and 12%-18% cleanup additive and 47%-63% water.
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| CN2013101488145A CN103275689A (en) | 2013-04-26 | 2013-04-26 | Association fracturing fluid densifier and preparation method thereof |
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| CN2013101488145A CN103275689A (en) | 2013-04-26 | 2013-04-26 | Association fracturing fluid densifier and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0302544A2 (en) * | 1987-08-03 | 1989-02-08 | Pumptech N.V. | High temperature guar-based fracturing fluid |
| US6251838B1 (en) * | 1998-10-02 | 2001-06-26 | Benchmark Research & Technologies, Inc. | Suspended delayed borate cross-linker |
| CN102127415A (en) * | 2011-01-18 | 2011-07-20 | 大庆油田有限责任公司 | Low-damage super guargum fracturing fluid |
| CN102757778A (en) * | 2012-08-14 | 2012-10-31 | 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 | Fracturing fluid capable of resisting high salinity water quality |
-
2013
- 2013-04-26 CN CN2013101488145A patent/CN103275689A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0302544A2 (en) * | 1987-08-03 | 1989-02-08 | Pumptech N.V. | High temperature guar-based fracturing fluid |
| US6251838B1 (en) * | 1998-10-02 | 2001-06-26 | Benchmark Research & Technologies, Inc. | Suspended delayed borate cross-linker |
| CN102127415A (en) * | 2011-01-18 | 2011-07-20 | 大庆油田有限责任公司 | Low-damage super guargum fracturing fluid |
| CN102757778A (en) * | 2012-08-14 | 2012-10-31 | 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 | Fracturing fluid capable of resisting high salinity water quality |
Non-Patent Citations (1)
| Title |
|---|
| 卢拥军: "有机硼压裂液延迟交联特性研究", 《石油与天然气化工》, vol. 24, no. 02, 25 May 1995 (1995-05-25), pages 134 - 138 * |
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Application publication date: 20130904 |