CN106905948B - A kind of micro- residue, weak injury guar gum clean fracturing fluid - Google Patents
A kind of micro- residue, weak injury guar gum clean fracturing fluid Download PDFInfo
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- CN106905948B CN106905948B CN201710207299.1A CN201710207299A CN106905948B CN 106905948 B CN106905948 B CN 106905948B CN 201710207299 A CN201710207299 A CN 201710207299A CN 106905948 B CN106905948 B CN 106905948B
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- 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
- C09K8/685—Compositions based on water or polar solvents containing organic compounds containing cross-linking agents
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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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/528—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning inorganic depositions, e.g. sulfates or carbonates
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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
- C09K8/605—Compositions for stimulating production by acting on the underground formation containing biocides
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- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
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- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
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- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/26—Gel breakers other than bacteria or enzymes
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Abstract
The present invention relates to a kind of micro- residues, the guar gum clean fracturing fluid of weak injury, are made of base fluid, crosslinking agent and gel breaker, and the base fluid is made of hydroxypropyl guar gum, cleanup additive, antiswelling stabilizing agent, pressure break fungicide, pressure break demulsifier, antisludging agent and water again.The present invention selects low dosage guar gum multicore crosslinking agent, there is stronger delay cross-linking effect, guar gum concentration can be greatly lowered and reduce glue level of residue, it is equipped with the fouling that multifunctional anti-incrustation agent prevents fracturing fluid water and water flooding from generating again, the selective macromolecule for also selecting the broken thorough sulfate radical-free of glue to generate simultaneously is broken catalyst, it can effectively reduce liquid viscosity and residue content, breaking glue solution surface tension after breaking gel is lower, breaking glue solution is set to be easier to the row of returning, the guar gum clean fracturing liquid system temperature and shearing sustainability of formation is good, and solid-carrying performance is excellent.
Description
Technical field
The invention belongs to the preparation technical field of petrochemicals, it is related to the guar gum cleaning of a kind of micro- residue, weak injury
Fracturing fluid.
Background technique
Fracturing fluid is liquid used when borrowing liquid conductive power fracturing methods in oil extraction process, and guarantees pressure break
Success improves the Key formula of recovery ratio.The hydraulic fracturing liquid system that domestic each oil field uses at present mainly with guar gum and its is spread out
Based on biology, the preparation for adding a variety of auxiliary agents and crosslinking agent and gel breaker being combined to be formed, have it is at low cost, highly-safe, can grasp
The advantages such as the property made is strong, have a wide range of application, good combination property, are widely used in oil-gas field development so far.But conventional
Fracturing fluid system there are still residues big, broken glue it is bad and as system compatibility it is bad caused by compared with major injury the problems such as.
Conventional oil field fracturing fluid is mostly hydroxypropyl melon glue, and guar gum concentration is larger in pressure break system, into after stratum,
Hydroxypropyl guar gum can remain a large amount of residues in crack and sides of fracture, cause reservoir damage, cause stratum filtration ability to decline, production capacity
It reduces, directly affects fracturing effect.It reduces guar gum residue and the most direct method of insoluble matter is exactly to reduce guar gum dosage, and then subtract
The solid phase substance content for entering stratum less, so that the injury of fracturing fluid filtrate and residue fracture and reservoir be effectively reduced.But it is single
One reduction guar gum concentration can encounter again because fracturing fluid plastic and heatproof, it is anti-shearing it is unstable caused by jelly system viscoelasticity drop
The problems such as low, proppant settles.Can also realize additionally by the use of crosslinking agent reduces guar gum dosage.Currently used for guar gum pressure break
The crosslinking agent of liquid has borax, organic boron, organic titanium, organic zirconium etc., and wherein borax dosage is most wide at most.The advantages of borax crosslinkers
It is at low cost, but the disadvantage is that delayed cross-linking is poor, the resistance to temperature difference, dosage excessively easily becomes fragile.Have plenty of again, conventional at present is used for and pressure
Split liquid system combination gel breaker mostly use ammonium persulfate, due to ammonium persulfate gel breaker reaction time and its activity to temperature
Dependence is high, it is short to break the glue duration, and gel breaker aoxidizes broken glue with randomness, and guar gum glycosidic bond is caused not exclusively to be broken,
And broken glue reaction belongs to nonspecific reaction, any object (such as oil pipe, the stratum matrix and crude oil) reaction that can and encounter,
The sulfate radical formed after broken glue is complete also easily forms permanent precipitating with the barium strontium etc. in stratum, blocks pore throat, prevents oil stream
Outflow reduces permeability.In addition, contain different incrustation ions in conventional fracturing fluid water and water flooding at present, due to
The thermodynamic phase and chemical incompatibility of water, incrustation ion interaction after can generate it is unstable, be easy to precipitate
Substance, such as BaSO4、CaCO3、CaSO4Dirt etc., and thus cause serious scale, the blockage problem on equipment corrosion and stratum,
Huge economic loss is caused to oil field production run.And the antisludging agent applied on oil field at present is mostly the organic phosphorus of macromolecular
Sour object is easy to generate precipitating with other auxiliary agents (such as cleanup additive, clay stabilizer) in fracturing fluid or be incompatible.
Summary of the invention
It is an object of the invention to, injury rate height big for residue existing for conventional fracturing fluid system and by system compatibility
Property it is bad caused by the problems such as injuring, a kind of micro- residue of function admirable, the guar gum clean fracturing fluid of weak injury are provided, to reduce
Hydroxypropyl guar gum concentration and broken glue level of residue protect oil reservoir, while keeping excellent outstanding sand ability and heatproof resistant to shearing ability,
Reduce fracturing fluid to injure caused by reservoir, improves pressing crack construction success rate and fracturing effect.
The technical solution proposed for the above goal of the invention of realization is as described below.
A kind of micro- residue, weak injury guar gum clean fracturing fluid, it is characterised in that it is pressed by base fluid, crosslinking agent and gel breaker
The weight ratio of 1:0.001~0.005:0.0006~0.0008 forms, and the base fluid is grouped by the group of following mass percent
At: hydroxypropyl guar gum 0.17~0.35%, cleanup additive 0.1~0.5%, antiswelling stabilizing agent 0.1~0.5%, pressure break fungicide
0.05~0.15%, pressure break demulsifier 0.05~0.15%, antisludging agent 0~0.05%, remaining is water.
Above-mentioned micro- residue, weak injury guar gum clean fracturing fluid in, cleanup additive is by dodecyldimethylamine oxide and alkane
Base phenol polyethenoxy ether is stirred by 10~15: 5~10 compoundings and is made.
Above-mentioned micro- residue, weak injury guar gum clean fracturing fluid in, antiswelling stabilizing agent be by the chloro- 2- Hydroxyproyl Trimethyl of 3-
Ammonium chloride (hydroxypropyl quaternary ammonium salt) and potassium chloride are stirred by 20~30: 10~15 weight ratio to be made.
Above-mentioned micro- residue, weak injury guar gum clean fracturing fluid in, pressure break fungicide be dodecyl dimethyl benzyl chloride
Change ammonium.
Above-mentioned micro- residue, weak injury guar gum clean fracturing fluid in, pressure break demulsifier is polyethers demulsifier, specially alkane
Base phenolic resin block polyether AF6231, AF3125 or TA1031.
Above-mentioned micro- residue, weak injury guar gum clean fracturing fluid in, antisludging agent is by sodium ethylenediamine tetramethylenephosphonate
(EDTMPS), poly-aspartate (PASP) and aminotrimethylenephosphonic acid (ATP) are stirred by 5~9: 4~8: 6~10 weight ratio compounding
Mix mixing.
Above-mentioned micro- residue, weak injury guar gum clean fracturing fluid in, crosslinking agent use applicant research and development Authorization Notice No.
For the patented product guar gum multicore crosslinking agent of CN103881694B, the guar gum multicore crosslinking agent by following weight ratio raw material of substance
It is made: water 80~150, polyhydric alcohol amine 50~100, polyalcohol 50~100, saccharide compound 50~90, boron compound 80~
120, inorganic acid salt 50~80, wherein the polyhydric alcohol amine is triethanolamine or diethanol amine, and the polyalcohol is second two
Alcohol, pentaerythrite or diethylene glycol (DEG), the saccharide compound are fructose and/or maltose and/or lactose, the boron compound
For boric acid, the inorganic acid salt is zirconium chloride and/or titanium tetrachloride.The preparation method of the guar gum multicore crosslinking agent is: will
Water, polyhydric alcohol amine, polyalcohol, which are added in reactor, is heated to 60 DEG C, reacts 90~120min, adds boron compound, carbohydrate
Object, inorganic acid salt are closed, is warming up to 80 DEG C~90 DEG C, is reacted 3~6 hours, adjusts pH to 8~10, reaction 1~3 with sodium hydroxide
Hour to get arrive guar gum multicore crosslinking agent.
Above-mentioned micro- residue, weak injury guar gum clean fracturing fluid in, gel breaker is the Granted publication researched and developed using applicant
Number for CN103480419B patented product selectivity macromolecule be broken catalyst, the selectivity macromolecule fracture catalyst and its
Preparation method and the following steps are included: plus water be warming up to 50 DEG C into reaction kettle；Organic phosphine acids chelating is added into reaction kettle
Agent (aminotrimethylenephosphonic acid, 1- hydroxyl ethylidene -1,1- di 2 ethylhexyl phosphonic acid, ethylene diamine tetra methylene phosphonic acid, five methene phosphine of diethylenetriamine
Acid, any one in aminotrimethylenephosphonic acid), react 1h；Add reducing agent (carbohydrazide, carbonohydrazides, in hydrazine hydrate
Any one), react 30min；Boron removal catalyst is eventually adding (by N- methyl glucose osamine, benzoic acid, triethanolamine and water system
It is standby to form), reaction temperature is increased to 50-90 DEG C, is reacted 3h to get to selective macromolecule and is broken catalyst.
Micro- residue, weak injury guar gum clean fracturing fluid preparation method the following steps are included:
1) it prepares base fluid and accurately takes each component according to weight percent above-mentioned, sequentially add thickener, the row of helping in water
Agent, antiswelling stabilizing agent, pressure break fungicide, pressure break demulsifier, antisludging agent stand 1~4h of swelling after mixing, base fluid are made；
2) it prepares frozen glue and crosslinking agent and gel breaker is added in the base fluid obtained through step 1) according to the proportion, stir and evenly mix shape
At frozen glue；
3) preparation guar gum clean fracturing fluid makes the frozen glue obtained through step 2) keep constant temperature in 30 DEG C~90 DEG C water-baths, to
Up to micro- residue, the guar gum clean fracturing fluid of weak injury after the complete aquation of frozen glue.
Compared with prior art, the beneficial effects of the present invention are:
(1) crosslinking agent in the present invention uses low dosage guar gum multicore crosslinking agent, is capable of providing multiple crosslinking centers, can be big
The use concentration of amplitude reduction guar gum, while fracturing fluid residue and water-insoluble are reduced accordingly, dosage of crosslinking agent is few,
Injury of the guar gum system fracturing fluid to stratum can be significantly reduced；
(2) active function groups more containing hydroxyl, carboxyl, amino etc. in the multifunctional anti-incrustation agent that the present invention uses, increase
Its big internal surface area, has stronger chelating, absorption, exchange, complexing power, can be with the Ca in fracturing fluid water2+、Mg2+、
Ba2+Stable complex compound is formed Deng cation, reduction forms CaCO3、CaSO4、BaSO4A possibility that equal sediments, prevent pressure break
Liquid water and water flooding generate fouling；
(3) present invention effectively reduces liquid viscosity and residual using selective macromolecule fracture catalyst as gel breaker
Slag content, breaking glue solution surface tension after breaking gel is lower, and breaking glue solution is made to be easier to the row of returning；
(4) it is good using concentration, temperature and shearing sustainability to reduce guar gum for the guar gum clean fracturing liquid system that the present invention is formed
Good, solid-carrying performance is excellent, compared with conventional guar gum system, micro- residue of the present invention, weak injury guar gum clean fracturing liquid
It is that broken glue residue is less than 100mg/L, 10% is respectively less than to the injury rate of rock core.
Specific embodiment
In order to which technical characteristic of the invention, purpose and effective effect are more clearly understood, below with reference to example pair
The present invention is specifically described.It is necessary to herein it is emphasized that listed embodiment is only intended to do further the present invention
Illustrate, should not be understood as limiting the scope of the invention, the scientific research technical staff of fields, according to foregoing invention content
The modifications and adaptations that non-intrinsically safe is made to the present invention, should still fall within protection scope of the present invention.
Embodiment 1
It is that 995mL water is added in 1000mL beaker in capacity, 1.7g hydroxypropyl guar gum is weighed, by it under stirring
Be slowly added in water, high-speed stirred 10min, then sequentially add 1g by dodecyldimethylamine oxide and alkyl phenol polyoxy
Ethylene press by 10: 8 weight ratio compounding made of efficiently cleanup additive, 1g by 3- chloro-2-hydroxypropyl-trimethyl ammonium chloride and chlorine
The dodecyl benzyl dimethyl ammonium chloride of antiswelling stabilizing agent, 0.5g that change potassium is mixed by 20: 12 weight ratio (kill by pressure break
Microbial inoculum), polyethers the demulsifier AF6231,0.6g of 0.5g by sodium ethylenediamine tetramethylenephosphonate, poly-aspartate and amino
Three methylenephosphonic acids are stirred by 8: 6: 8 weight ratio compounding, are further continued for high-speed stirred 20min, stand swelling after mixing uniformly
3h；The base fluid 100g for taking above-mentioned preparation, the low dosage guar gum multicore crosslinking agent that 0.2g is added under stirring (are specially announced
Number for the substance recorded in embodiment 2 in the specification text of CN103881694B), add the selective macromolecule of 0.06g
Fracture catalyst (specially notification number is the substance recorded in embodiment 1 in the specification text of CN103480419B), continues
Stirring forms frozen glue.Constant temperature is kept in 30 DEG C of water-baths, the complete aquation of frozen glue after 2h.Breaking glue solution is measured with ZNN-D6 type viscosimeter
Apparent viscosity is 2.9mPas, and rotating drop ultralow interfacial tension to measure breaking glue solution surface tension with XZD-5 is 22.1mN/m.
Embodiment 2
It is that 991mL water is added in 1000mL beaker in capacity, 2.5g hydroxypropyl guar gum is weighed, by it under stirring
Be slowly added in water, high-speed stirred 10min, then sequentially add 2g by dodecyldimethylamine oxide and alkyl phenol polyoxy
The 3- chloro-2-hydroxypropyl-trimethyl ammonium chloride and potassium chloride of efficient cleanup additive made of weight ratio compounding of the ethylene by 12: 8,2g
The dodecyl benzyl dimethyl ammonium chloride (pressure break fungicide) of the antiswelling stabilizing agent, 1g that are mixed by 30: 12 weight ratio,
Polyethers demulsifier AF3125,0.1g of 1g by sodium ethylenediamine tetramethylenephosphonate (EDTMPS), poly-aspartate (PASP)
Manufactured multifunctional anti-incrustation agent is compounded by 6: 5: 8 weight ratio with aminotrimethylenephosphonic acid (ATP), is further continued for high-speed stirred
20min stands swelling 2h after mixing uniformly；The low dosage of 0.25g is added in the base fluid 100g for taking above-mentioned preparation under stirring
Guar gum multicore crosslinking agent (specially notification number is the substance recorded in embodiment 2 in the specification text of CN103881694B),
Adding 0.065g selectivity macromolecule fracture catalyst, (specially notification number is real in the specification text of CN103480419B
Apply the substance recorded in example 8), continue stirring and forms frozen glue.Constant temperature is kept in 45 DEG C of water-baths, the complete aquation of frozen glue after 2h.With
It is 2.7mPas that ZNN-D6 type viscosimeter, which measures breaking glue solution apparent viscosity, rotates drop ultralow interfacial tension with XZD-5 and measures brokenly glue
Liquid surface tension is 23.2mN/m.
Embodiment 3
It is that 989mL water is added in 1000mL beaker in capacity, 2.8g hydroxypropyl guar gum is weighed, by it under stirring
Be slowly added in water, high-speed stirred 10min, then sequentially add 3g by dodecyldimethylamine oxide and alkyl phenol polyoxy
Ethylene by 15: 10 weight ratio compounding made of efficiently cleanup additive, 3g by 3- chloro-2-hydroxypropyl-trimethyl ammonium chloride and chlorination
Dodecyl benzyl dimethyl ammonium chloride (the pressure break sterilization of antiswelling stabilizing agent, 1g that potassium is mixed by 25: 15 weight ratio
Agent), polyethers demulsifier AF1031,0.3g of 1g by sodium ethylenediamine tetramethylenephosphonate (EDTMPS), poly-aspartate
(PASP) and aminotrimethylenephosphonic acid (ATP) is by 9: 8: the 10 manufactured multifunctional anti-incrustation agent of weight ratio compounding, is further continued for high speed
20min is stirred, swelling 2h is stood after mixing uniformly；The low of 0.3g is added in the base fluid 100g for taking above-mentioned preparation under stirring
(specially notification number is the object recorded in embodiment 2 in the specification text of CN103881694B to dosage guar gum multicore crosslinking agent
Matter), add 0.07g selective macromolecule fracture catalyst (specially notification number be CN103480419B specification text
The substance recorded in embodiment 5 in this), continue stirring and forms frozen glue.Constant temperature is kept in 60 DEG C of water-baths, the complete water of frozen glue after 2h
Change.Measuring breaking glue solution apparent viscosity with ZNN-D6 type viscosimeter is 2.6mPas, rotates drop ultralow interfacial tension with XZD-5 and surveys
Obtaining breaking glue solution surface tension is 23.3mN/m.
Embodiment 4
It is that 985mL water is added in 1000mL beaker in capacity, weighs 3.25g hydroxypropyl guar gum, it will under stirring
It is slowly added in water, then high-speed stirred 10min sequentially adds being gathered by dodecyldimethylamine oxide and alkyl phenol for 4g
Ethylene oxide by 13: 7 weight ratio compounding made of efficiently cleanup additive, 4g by 3- chloro-2-hydroxypropyl-trimethyl ammonium chloride and chlorine
The dodecyl benzyl dimethyl ammonium chloride of antiswelling stabilizing agent, 1.5g that change potassium is mixed by 28: 12 weight ratio (kill by pressure break
Microbial inoculum), polyethers demulsifier AF3125,0.4g of 1.5g by sodium ethylenediamine tetramethylenephosphonate (EDTMPS), poly- asparagus fern ammonia
Sour (PASP) and aminotrimethylenephosphonic acid (ATP) compound manufactured multifunctional anti-incrustation agent by 8: 6: 7 weight ratio, are further continued for high speed
20min is stirred, swelling 2h is stood after mixing uniformly；The melon of 0.4g is added in the base fluid 100g for taking above-mentioned preparation under stirring
Glue multicore crosslinking agent (specially notification number is the substance recorded in embodiment 2 in the specification text of CN103881694B), then
(specially notification number is real in the specification text of CN103480419B to the selective macromolecule fracture catalyst of addition 0.07g
Apply the substance recorded in example 10), continue stirring and forms frozen glue.Constant temperature is kept in 75 DEG C of water-baths, the complete aquation of frozen glue after 2h.With
It is 2.6mPas that ZNN-D6 type viscosimeter, which measures breaking glue solution apparent viscosity, rotates drop ultralow interfacial tension with XZD-5 and measures brokenly glue
Liquid surface tension is 21.8mN/m.
Embodiment 5
It is that 983mL water is added in 1000mL beaker in capacity, 3.5g hydroxypropyl guar gum is weighed, by it under stirring
Be slowly added in water, high-speed stirred 10min, then sequentially add 5g by dodecyldimethylamine oxide and alkyl phenol polyoxy
Ethylene by 10: 9 weight ratio compounding made of efficiently cleanup additive, 5g by 3- chloro-2-hydroxypropyl-trimethyl ammonium chloride and chlorination
Dodecyl benzyl dimethyl ammonium chloride (the pressure break sterilization of antiswelling stabilizing agent, 1.5g that potassium is mixed by 21: 12 weight ratio
Agent), polyethers demulsifier TA1031,0.5g of 1.5g by sodium ethylenediamine tetramethylenephosphonate (EDTMPS), poly-aspartate
(PASP) and aminotrimethylenephosphonic acid (ATP) is by 7: 6: the 8 manufactured multifunctional anti-incrustation agent of weight ratio compounding, is further continued for high-speed stirring
20min is mixed, swelling 2h is stood after mixing uniformly；The guar gum of 0.5g is added in the base fluid 100g for taking above-mentioned preparation under stirring
Multicore crosslinking agent is specially the substance recorded in embodiment 2 in specification text that notification number is CN103881694B), it adds
(specially notification number is embodiment in the specification text of CN103480419B to the selective macromolecule fracture catalyst of 0.08g
The substance recorded in 15), continue stirring and forms frozen glue.Constant temperature is kept in 90 DEG C of water-baths, the complete aquation of frozen glue after 2h.Use ZNN-
It is 2.7mPas that D6 type viscosimeter, which measures breaking glue solution apparent viscosity, rotates drop ultralow interfacial tension with XZD-5 and measures breaking glue solution table
Face tension is 22.6mN/m.
According to " aqueous fracturing fluid method of evaluating performance " (SY-T 5107-2005) test the various embodiments described above to rock core base
Matter permeability injury and residue content, data are as shown in table 1.As can be seen from Table 1, fracturing fluid system residue of the invention is less than
100mg/L is the guar gum clean fracturing liquid system of a kind of micro- residue, weak injury to the injury rate of rock core less than 10%.
1 embodiment breaking glue solution injury rate of table and residue content
| Number | Injury rate (%) | Residue content (mg/L) |
| Embodiment 1 | 7.96 | 70.6 |
| Embodiment 2 | 8.48 | 78.3 |
| Embodiment 3 | 8.73 | 86.2 |
| Embodiment 4 | 9.01 | 91.3 |
| Embodiment 5 | 9.53 | 95.4 |
Claims (1)
1. a kind of guar gum clean fracturing fluid, it is characterised in that: press 1: 0.001~0.005 by base fluid, crosslinking agent and gel breaker:
0.0006~0.0008 weight ratio composition, the base fluid are grouped as by the group of following mass percent: hydroxypropyl guar gum
0.17~0.35%, cleanup additive 0.1~0.5%, antiswelling stabilizing agent 0.1~0.5%, pressure break fungicide 0.05~0.15%, pressure
Demulsifier 0.05~0.15%, antisludging agent 0~0.05% are split, remaining is water；
The cleanup additive is pressed 10~15: 5~10 weight ratio by dodecyldimethylamine oxide and alkyl phenol polyoxyethylene ether
Compounding, which is stirred, to be made；
The antiswelling stabilizing agent is the weight that 20~30: 10~15 are pressed by 3- chloro-2-hydroxypropyl-trimethyl ammonium chloride and potassium chloride
It is made than being stirred；
The pressure break fungicide is dodecyl benzyl dimethyl ammonium chloride；
The pressure break demulsifier is polyethers demulsifier, specially AF6231, AF3125 or TA1031；
The antisludging agent presses 5~9: 4~8: 6 by sodium ethylenediamine tetramethylenephosphonate, poly-aspartate and aminotrimethylenephosphonic acid
~10 weight ratio compounding is stirred.
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| CN108641700B (en) * | 2018-05-18 | 2020-10-09 | 陕西省石油化工研究设计院 | Multi-effect fracturing additive and preparation method and application thereof |
| CN109054800B (en) * | 2018-08-08 | 2021-12-31 | 中国石油大学(华东) | Non-oxidation gel breaker suitable for boron-crosslinked guanidine gum fracturing fluid, boron-crosslinked guanidine gum fracturing fluid and recycling method |
| CN109082270A (en) * | 2018-08-22 | 2018-12-25 | 陕西延长油田压裂材料有限公司 | A kind of low residue guar gum fracturing fluid and preparation method thereof |
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