CN104046347B - A kind of hydroxypropyl guar fracturing fluid synergist, preparation method and application - Google Patents
A kind of hydroxypropyl guar fracturing fluid synergist, preparation method and application Download PDFInfo
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- CN104046347B CN104046347B CN201310078556.8A CN201310078556A CN104046347B CN 104046347 B CN104046347 B CN 104046347B CN 201310078556 A CN201310078556 A CN 201310078556A CN 104046347 B CN104046347 B CN 104046347B
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
- C09K8/68—Compositions based on water or polar solvents containing organic compounds
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Abstract
The invention discloses a kind of hydroxypropyl guar fracturing fluid synergist, preparation method and application.Synergist is composed of the following components：Polyhydric alcohol or polyhydroxy aldoketoneses 4～10%；Ethylenediaminetetraacetic acid or edetate 2～5%；Strong base-weak acid salt or highly basic 0.1～1%；Balance of water.Preparation method includes：1. by described consumption, ethylenediaminetetraacetic acid or edetate, polyhydric alcohol or polyhydroxy aldoketoneses are sequentially added in water, stirring, control temperature in the range of 30 50 DEG C, until forming the solution of clear；2. by strong base weak acid salt or highly basic（As sodium carbonate, sodium hydroxide etc.）It is dissolved in above-mentioned solution, stir and be changed into light brown to color.Application in exploration of oil and gas field for the synergist of the present invention, described synergist is added in fracturing fluid, and the consumption of synergist is 0.1～1 weight portion.The concentration of hydroxypropyl guar can be greatly lowered, reduce breaking glue solution residue content, improve fracturing effect.
Description
Technical field
The present invention relates to oilfield prospecting developing field, further say, be to be related to a kind of hydroxypropyl guar fracturing fluid to increase
Effect agent, preparation method and application.
Background technology
The use of most fracturing fluid is both at home and abroad hydroxypropyl guar boron cross-linking system at present, this system have with low cost,
The feature that solid-carrying performance is excellent, breaking glue solution viscosity is low, resistance-reducing performance is good, but exist and be heated, shear fast degradation and residue contains
Measure high shortcoming.With going deep into of exploration and development process, the increase of layer of oil gas production depth, reservoir temperature rising, complex lithology and sky
Right fracture development, pressure break scale are big, time length situation gets more and more, and require also more and more higher to fracturing fluid property.For height
Temperature, intrinsic fracture develop the construction of well it is desirable to fracturing fluid must high temperature resistant, anti-shearing, way that viscosity stability is excellent, current
To improve hydroxypropyl guar concentration, such as formation temperature more than 120 DEG C, the concentration of hydroxypropyl guar many 0.5% with
On, so can ensure that fracturing fluid has enough viscosity and heatproof anti-shear performance it is ensured that construction is smoothed out.But hydroxypropyl guanidine
Fracturing fluid can produce substantial amounts of water insoluble residue in the earth formation after breaking gel, blocks proppant seepage channel, reduces fracture guide
Ability, substantially reduces measures to reform effect.Hydroxypropyl guar concentration is higher, will necessarily produce in the earth formation and more break glue
Residue, this undoubtedly to improve effect of increasing production be very unfavorable.
Content of the invention
For solving problems of the prior art, the invention provides a kind of hydroxypropyl guar fracturing fluid synergist, system
Preparation Method and application.Hydroxypropyl guar consumption can be greatly lowered under the high temperature conditions, improve fracturing fluid heat resistance, reduce broken
Glue residue content, improves fracturing effect.
An object of the present invention is to provide a kind of hydroxypropyl guar fracturing fluid synergist.
The following components of described synergist densitometer by weight：
Polyhydric alcohol or polyhydroxy aldoketoneses 4-10%
Ethylenediaminetetraacetic acid or edetate 2-5%
Strong base-weak acid salt or highly basic 0.1-1%
Balance of water.
Polyhydric alcohol or polyhydroxy aldoketoneses age resister are it is ensured that hydroxypropyl guar fracturing fluid is under the conditions of high-temperature heating
Not aging, contribute to stablizing of crosslinking chemical bond, it is to avoid because the reasons such as high temperature, high speed shear cause boron oxygen bond rupture.Described many
First alcohol or polyhydroxy aldoketoneses are preferably glycerol, mannose, ketohexose, aldohexose.
Ethylenediaminetetraacetic acid or the anti-shearing hardening agent of edetate heatproof are it is ensured that fracturing fluid is in hot conditionss
Under there is shear viscosity it is ensured that fracturing fluid solid-carrying performance not with shear time extend and reduce；Fracturing fluid can be improved simultaneously
Outstanding sand ability, it is to avoid because proppant settle formed sand bridge and lead to sand plug, be conducive to improve pressing crack construction safety.
Strong base-weak acid salt or highly basic comprehensive coordination effect, are conducive to synergist to preserve for a long time, improve the steady of product
Qualitative and effect duration；Described strong base-weak acid salt is preferably sodium carbonate；Described highly basic is preferably sodium hydroxide.
The second object of the present invention is to provide a kind of preparation method of hydroxypropyl guar fracturing fluid synergist.
Comprise the steps of：
1. polyhydric alcohol to be added or polyhydroxy aldoketoneses, ethylenediaminetetraacetic acid or edetate, by force are calculated
Alkali salt of weak acid or highly basic（As sodium carbonate, sodium hydroxide etc.）With the consumption of water, first add water in reactor, by ethylenediamine tetrem
Acid or edetate add, and are made into aqueous solution, and stirring adds polyhydric alcohol or polyhydroxy aldoketoneses, control temperature to exist
In the range of 30-50 DEG C, until forming the solution of clear；
2. by strong base-weak acid salt or highly basic（As sodium carbonate, sodium hydroxide etc.）It is dissolved in above-mentioned solution, stir and become to color
For light brown.
The third object of the present invention is to provide application in exploration of oil and gas field for the described hydroxypropyl guar fracturing fluid synergist.
For various containing compositions such as different clay stabilizers, cleanup additive, surfactant, foaming agent, pH adjusting agents
Conventional pressure break formula of liquid, after adding the synergist of 0.1-1.0 part weight wherein, under equal temperature conditionss, can be by hydroxypropyl guanidine
The concentration of glue is greatly lowered.Reduce the consumption of hydroxypropyl guar, breaking glue solution residue content will necessarily be reduced, improve pressure break
Effect.
The present invention is widely used in the fracturing fluid system with hydroxypropyl guar as thickening agent.Under hot conditionss, do not reducing
On the premise of fracturing fluid heatproof anti-shear performance, can effectively reduce hydroxypropyl guar usage amount.According to technical scheme
After completing production, liquid properties evaluation can execute according to the regulation in SY/T5107-2005.Synergist during liquid is joined at scene
Adding Way is equal to other additives, does not increase extra work amount and labor intensity.
Brief description
Fig. 1 embodiment 1 in 120 DEG C of condition down cut 2h fracturing fluid viscosity curves
Fig. 2 embodiment 2 in 120 DEG C of condition down cut 2h fracturing fluid viscosity curves
Fig. 3 embodiment 3 in 120 DEG C of condition down cut 2h fracturing fluid viscosity curves
Fig. 4 embodiment 4 in 120 DEG C of condition down cut 2h fracturing fluid viscosity curves
Specific embodiment
With reference to embodiment, further illustrate the present invention, raw materials used be commercially available.
Embodiment 1：
（1）Accurately weigh 4kg mannose（Technical pure）, 5kg disodium EDTA EDTA-2Na（Technical pure）、
0.1kg sodium carbonate（Technical pure）；（2）Get clear water 90.9kg in a kettle. ready；（3）First by the ethylenediaminetetraacetic acid weighing
Disodium salt EDTA-2Na adds in reactor, controls temperature 30-50 DEG C, stirring, until forming clear transparent solutions；（4）To claim
The mannose taking adds in reactor, stirring, until forming clear transparent solutions；（5）The sodium carbonate weighing is added reactor
In, stir and be changed into light brown to color and can stop, prepared hydroxypropyl guar fracturing fluid synergist.
According to formula, " 0.3% hydroxypropyl guar+2% expansion-resisting agent+0.5% cleanup additive+0.1% surfactant+0.02%pH is adjusted
Agent ", preparing fracturing fluid 500mL, add the synergist of 2.5mL embodiment preparation, stir, fully swelling 2h, stand-by；（2）
Prepare the organic borate cross-linker of 5wt%（Industrial goods）5mL, good fracturing fluid swelling with 100mL is crosslinked；（3）Using rotating cylinder viscometer
（As RS600）In 120 DEG C, 170s-1Condition down cut 2h, measures the heatproof anti-shear performance of the fracturing fluid adding synergist.Bent
Line is as shown in Figure 1（Abscissa is the time, and vertical coordinate is viscosity）.In the shear history of 2h, fracturing fluid viscosity is maintained at
200mPa s about, be above standard 50mPa s specified in SY/T6376-1998, and fracturing fluid viscosity is with shear time
Extend fall less, illustrate that synergist improves the aging resistance of liquid and anti-shearing degradation capability.
Embodiment 2：
（1）Accurately weigh 8kg glycerol（Technical pure）, 2kg ethylenediaminetetraacetic acid（Technical pure）、1kgNaOH（Technical pure）；
（2）Get clear water 89kg in a kettle. ready；（3）First the ethylenediaminetetraacetic acid weighing is added in reactor, control temperature
30-50 DEG C, stirring, until form clear transparent solutions；（4）The glycerol weighing is added in reactor, stirring, until form clear
Clear clear solution；（5）The NaOH weighing is added in reactor, stirs and be changed into light brown to color and can stop, prepared hydroxypropyl
Base guanidine gum fracturing fluid synergist.
According to formula " 0.3%HPG+2% expansion-resisting agent+0.5% cleanup additive+0.1% surfactant+0.02%pH regulator ", prepare pressure
Split liquid 500mL, add the synergist of 2mL embodiment preparation, stir, fully swelling 2h, stand-by；（2）Prepare having of 5wt%
Machine borate crosslinker（Industrial goods）5mL, good fracturing fluid swelling with 100mL is crosslinked；（3）Using rotating cylinder viscometer（As RS600）?
120℃、170s-1Condition down cut 2h, measures the heatproof anti-shear performance of the fracturing fluid adding synergist.Curve is as shown in Figure 2
（Abscissa is the time, and vertical coordinate is viscosity）.In the shear history of 2h, fracturing fluid viscosity is maintained at 200mPa s, surpasses
Cross 50mPa s specified in standard SY/T6376-1998, and fracturing fluid viscosity extend fall less with shear time,
Illustrate that synergist improves the aging resistance of liquid and anti-shearing degradation capability.
Embodiment 3：
（1）Accurately weigh 4.5kg ketohexose（Technical pure）, 4.5kg disodium EDTA EDTA-2Na（Industry
Pure）, 0.1kg sodium carbonate（Technical pure）；（2）Get clear water 90.9kg in a kettle. ready；（3）First by the ethylenediamine tetraacetic weighing
Acetic acid disodium salt EDTA-2Na adds in reactor, controls temperature 30-50 DEG C, stirring, until forming clear transparent solutions；（4）
The ketohexose weighing is added in reactor, stirring, until form clear transparent solutions；（5）The sodium carbonate weighing is added anti-
Answer in kettle, stir and be changed into light brown to color and can stop, prepared hydroxypropyl guar fracturing fluid synergist.
According to formula, " 0.3% hydroxypropyl guar+2% expansion-resisting agent+0.5% cleanup additive+0.1% surfactant+0.02%pH is adjusted
Agent ", preparing fracturing fluid 500mL, add the synergist of 2.5mL embodiment preparation, stir, fully swelling 2h, stand-by；（2）
Prepare the organic borate cross-linker of 5wt%（Industrial goods）5mL, good fracturing fluid swelling with 100mL is crosslinked；（3）Using rotating cylinder viscometer
（As RS600）In 120 DEG C, 170s-1Condition down cut 2h, measures the heatproof anti-shear performance of the fracturing fluid adding synergist.Bent
Line is as shown in Figure 3（Abscissa is the time, and vertical coordinate is viscosity）.In the shear history of 2h, fracturing fluid viscosity is maintained at
200mPa s about, be above standard 50mPa s specified in SY/T6376-1998, and fracturing fluid viscosity is with shear time
Extend fall less, illustrate that synergist improves the aging resistance of liquid and anti-shearing degradation capability.
Embodiment 4：
（1）Accurately weigh 6kg aldohexose（Technical pure）, 3kg disodium EDTA EDTA-2Na（Technical pure）、
0.1kg sodium carbonate（Technical pure）；（2）Get clear water 90.9kg in a kettle. ready；（3）First by the ethylenediaminetetraacetic acid weighing
Disodium salt EDTA-2Na adds in reactor, controls temperature 30-50 DEG C, stirring, until forming clear transparent solutions；（4）To claim
The aldohexose taking adds in reactor, stirring, until forming clear transparent solutions；（5）The sodium carbonate weighing is added reactor
In, stir and be changed into light brown to color and can stop, prepared hydroxypropyl guar fracturing fluid synergist.
According to formula, " 0.3% hydroxypropyl guar+2% expansion-resisting agent+0.5% cleanup additive+0.1% surfactant+0.02%pH is adjusted
Agent ", preparing fracturing fluid 500mL, add the synergist of 2.5mL embodiment preparation, stir, fully swelling 2h, stand-by；（2）
Prepare the organic borate cross-linker of 5wt%（Industrial goods）5mL, good fracturing fluid swelling with 100mL is crosslinked；（3）Using rotating cylinder viscometer
（As RS600）In 120 DEG C, 170s-1Condition down cut 2h, measures the heatproof anti-shear performance of the fracturing fluid adding synergist.Bent
Line is as shown in Figure 4（Abscissa is the time, and vertical coordinate is viscosity）.In the shear history of 2h, fracturing fluid viscosity is maintained at
200mPa s about, be above standard 50mPa s specified in SY/T6376-1998, and fracturing fluid viscosity is with shear time
Extend fall less, illustrate that synergist improves the aging resistance of liquid and anti-shearing degradation capability.
Fracturing fluid residue method of testing according to specified in SY/T5107-2005, to example 1, example 2, example 3, example 4
In " 0.3%HPG+2% expansion-resisting agent+0.5% cleanup additive+0.1% surfactant+0.02%pH regulator " formula tested, averagely residual
Slag content is 140-170mg/L, and this formula system can apply the reservoir that temperature reaches 120 DEG C.And under normal circumstances, it is applied to 120
The fracturing fluid of DEG C reservoir, its hydroxypropyl guar concentration mostly is more than 0.5%, test residue content many in more than 350mg/L.
Contrasted by above, it can be found that employing the hydroxypropyl guar fracturing fluid of synergist, keeping, heatproof is anti-shearing
On performance basis, reduce hydroxypropyl guar usage amount and residue content, on the one hand reduce fracturing fluid cost, on the other hand
Reduce the injury of breaking glue solution residue fracture, be conducive to improving fracturing effect.
Claims (3)
1. a kind of hydroxypropyl guar fracturing fluid synergist is it is characterised in that include the following components of densitometer by weight：
Polyhydric alcohol or polyhydroxy aldoketoneses 4-10%
Ethylenediaminetetraacetic acid or edetate 2-5%
Strong base-weak acid salt or highly basic 0.1-1%
Balance of water；
Described strong base-weak acid salt is sodium carbonate；Described highly basic is sodium hydroxide；Described polyhydric alcohol or polyhydroxy aldoketoneses are glycerol,
Ketohexose, aldohexose.
2. a kind of preparation method of hydroxypropyl guar fracturing fluid synergist as claimed in claim 1, comprises the steps of：
1. by described consumption, ethylenediaminetetraacetic acid or edetate, polyhydric alcohol or polyhydroxy aldoketoneses are sequentially added water
In, stirring, control temperature in the range of 30-50 DEG C, until forming the solution of clear；
2. strong base-weak acid salt or highly basic are dissolved in above-mentioned solution, stir and be changed into light brown to color.
3. application in exploration of oil and gas field for the hydroxypropyl guar fracturing fluid synergist as claimed in claim 1 it is characterised in that：
Described hydroxypropyl guar fracturing fluid synergist is added in fracturing fluid, the volume of hydroxypropyl guar fracturing fluid synergist
For fracturing fluid volume 0.5%.
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| CN110373174A (en) * | 2019-07-26 | 2019-10-25 | 大港油田集团有限责任公司 | Seawater-based fracturing fluid synergist and fracturing fluid and preparation method |
| CN110437815A (en) * | 2019-07-26 | 2019-11-12 | 大港油田集团有限责任公司 | Seawater-based fracturing fluid and preparation method thereof |
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