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133results about How to "Low residue content" patented technology
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Cross-linking agent for low concentration guanidine gum pressing crack system and preparation technology thereof
ActiveCN103265943AReduce the dosage of guar gumReduce harmDrilling compositionGlycerolTriethanolamine
The invention discloses a cross-linking agent for a low concentration guanidine gum pressing crack system, comprising the following raw materials by weight: 12.5-20 parts of glycerol, 10-15 parts of borax, 4-6 parts of sodium gluconate, 1.5-2 parts of sodium hydroxide, 0-4 parts of inorganic zirconate, 0-4 parts of triethanolamine, and 49-68 parts of water. The invention further discloses a preparation technology. The beneficial effects comprise that: the cross-linking agent for a pressing crack liquid can substantially raise the usage efficiency of the guanidine gum, greatly reduces a usage amount of the guanidine gum; and in same case, the concentration of the guanidine can reduce 30-50%, the content of the guanidine gum residue reduces more than 30%, and a rock core damage rate relatively reduces more than 20%. The cross-linking agent prepared in the invention has same application with the current cross-linking agent, and accordingly it is convenient for on-site construction.
Owner:四川省博仁达石油科技有限公司
Clean carbon dioxide foam fracturing fluid and preparation method thereof
ActiveCN104531129AFine foamImprove foam stabilityDrilling compositionPotassium persulfatePolymer science
The invention discloses clean carbon dioxide foam fracturing fluid and a preparation method thereof, and relates to the technical field of oilfield chemistry and fracturing production increase. The carbon dioxide foam fracturing fluid is mainly composed of a base solution, a foaming agent, a gel breaker and liquid carbon dioxide with the mass ratio being 100 to 0.15-0.45 to 0.02-0.08 to 100-900. The base solution is formed by 0.2%-0.55% of a thickening agent and water. The thickening agent is mainly formed by bisacrylamide, vinyl pyrrolidone, kation unsaturated monomer, anion unsaturated monomer, an initiator, sodium carbonate, an emulsifying agent and a hydrotropy agent. The foaming agent is mainly formed by hexadecyl dimethyl tertiary amine, dimethyl sulfate, caustic soda flakes, potassium persulfate and solvent. The clean carbon dioxide foam fracturing fluid has the advantages of being high in foam stability, high in temperature resistance and shear resistance, high in sand-carrying performance, wide in applicable temperature range, extremely low in residue content, high in backflow performance, and small in secondary damage to a reservoir after fracturing, thereby improving the fracturing effect and increasing the reservoir productivity.
Owner:CHENGDU BAICHUN PETROLEUM TECH
Fracturing fluid capable of resisting high salinity water quality
ActiveCN102757778AWide range of crosslinkingReduce dosageDrilling compositionCross-linkWater quality
The invention relates to a fracturing fluid capable of resisting high salinity water quality. The fracturing fluid is characterized by being composed of a base fluid and a cross-linking fluid which are fully mixed in proportion. The base fluid contains a chelate cosolvent and a chelate stabilizer, wherein the chelate cosolvent can restrain high salinity of water quality and promote swelling of guanidine gum. The base fluid comprises 98.2-98.65 parts of high salinity surface water, 0.1-0.15 part of the chelate cosolvent,0.3-0.4 part of thickener, 0.1-0.15 part of bactericide, 0.3-0.5 part of clay stabilizer, 0.5 part of demulsifying cleanup agent and 0.05-0.1 part of the chelate stabilizer; the cross-linking fluid comprises 50 parts of water, 50 parts of organic cross-linking agents and 0.35 part of gel breaker; and the fracturing fluid comprises 99.2-99.5 parts of the base fluid and 0.5-0.8 part of the cross-linking fluid. By aid of the fracturing fluid, water resources can be saved effectively, and the success rate for fracturing construction can be improved.
Owner:CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD CHANGQING DOWNHOLE TECH CO
High-temperature-resistance low-friction weighted clean fracturing fluid and preparation method thereof
ActiveCN105733547APromote swellingEnhanced associationDrilling compositionReduction rateHigh pressure
The invention discloses a high-temperature-resistance low-friction weighted clean fracturing fluid which is suitable for high-temperature and high-pressure reservoir reconstruction at 170 DEG C and a preparation method thereof.The fracturing fluid is prepared from, by weight, 0.2%-0.8% of high-temperature-resistance thickening agent, 0.1%-0.8% of system synergist, 0.1%-0.3% of high temperature stabilizer, 0%-42% of weighting agent and the balance fresh water.The high-temperature-resistance low-friction weighted clean fracturing fluid has the following functions and advantages that the weighting agent can be adopted for weighting, and the density is adjustable between 0 and 1.32 g / cm<3>; good temperature-resistance and anti-shearing properties are achieved, and the requirement of high-temperature deep well fracturing construction at 170 DEG C can be met by adjusting a formula; a good resistance reduction property is achieved, pipeline friction resistance can be effectively reduced, and the resistance reduction rate can reach 70%; the fracturing fluid is a fluid with a reversible structure, and the structure damage after high shearing is small; the residue content of the fracturing fluid is decreased to below 10 mg / L, damage to a reservoir and supporting cracks is reduced, the fracturing effect is improved, and the reservoir productivity is increased.
Owner:CHENGDU BAICHUN PETROLEUM TECH +1
Fracturing fluid thickening agent and fracturing fluid containing the same
The invention provides a fracturing fluid thickening agent, prepared by modifying galactomannan compounds with ion etherification under alkaline conditions, wherein the ion etherification substitution degree is 0.01-0.45. The invention also provides a fracturing fluid containing the thickening agent. The thickening agent used for vegetable gelatin fracturing is instant, and has the advantages of strong tackifying capability, temperature tolerance, salt resistance, anti-shearing performance, and low residue amount.
Owner:CHINA GASOLINEEUM & CHEM KUSN
Water-base fracturing fluid with low harm to permeability of reservoir bed and diversion capability of crack
The present invention relates to an improvement on oil-field water base fracture fluid formula. Said water base fracture liquid is composed of base fluid and cross-linking liquor according to a certain ratio. Said base fluid is formed from (by wt%) 0.25-0.40% of thickness agent, 0.15-0.30% of cleanup additive, 0.10-0.20% of emulsion-breaking emulsion preventer, 1.0-2.0% of antiswelling agent, 0.10-0.20% of clay stabilizing agent, 0.1-0.15% of vegetable gun stabilizing agent and 96.65-98.3% of water, and the cross-linking liquor is formed from 3.0-6.0% of cross-linking agent, 0.4-1.2% of breaking agent and 92.8-96.6% of water, and the volume ratio of base fluid and cross-linking liquor is 20-50:1. Said invention can effectively improve fracture fluid properties, and its damage to reservoir permeability and fracture conductivity can be minimum.
Owner:DAQING OILFIELD CO LTD
Fracturing fluid capable of resisting low pH value environment and higher salinity and preparation method thereof
The invention relates to a fracturing fluid capable of resisting low pH value environment and higher salinity and a preparation method thereof. Most conventional fracturing fluid can have favorable viscoelasticity only in an alkaline environment, and the natural vegetable glue used under normal conditions is difficulty for crosslinking under acidic conditions. The preparation method comprises the following steps: uniformly mixing a viscoelastic surfactant, an acid and a dispersion pour-point depressant to form a liquid component mixture; and dissolving a water-soluble nonionic polymer thickener at normal temperature, adding the liquid component mixture, and stirring uniformly to obtain the fracturing fluid. Under the condition of not using any crosslinking agent, the vermiform accumulation of the viscoelastic surfactant is utilized to coat the linear high-polymer part inside the viscoelastic surfactant, so that the linear high polymer generates the crosslinking-like effect due to the existence of the viscoelastic surfactant when meeting the acid and shrinking. The fracturing fluid has high viscosity in a neutral environment due to the linear high polymer, and thus, can not have the solid carrying capacity due to greatly lowered viscosity under acidic conditions.
Owner:SHAANXI BANGXI CHEM +1
High-temperature-resistant ground cross-linked acid liquor and preparation method thereof
InactiveCN104073237AGood temperature resistance and shear resistanceLow toxicityDrilling compositionCross-linkAcid fracturing
The invention provides high-temperature-resistant ground cross-linked acid liquor. The acid liquor comprises the following components in percentage by mass: 15-28 weight percent of acid, 0.4-1.0 weight percent of polyacrylamide polymer, 0.1-0.5 weight percent of aldehyde cross-linking agent, 0.05-0.25 weight percent of phenol cross-linking agent, 0.05-0.02 weight percent of crosslinking promoter, 0.5-2.0 weight percent of corrosion inhibitor, 0.5-2.0 weight percent of ferric ion stabilizer, 0.01-0.1 weight percent of ammonium persulfate and the balance of water, wherein the acid is calculated based on pure substances. The invention also provides a method for preparing the high-temperature-resistant ground cross-linked acid liquor. Industrial raw materials which are low in toxicity and low in price are taken as cross-linking agents and cross-linking promoter, the toxicity of the cross-linking agents can be reduced, the process for preparing the high-temperature-resistant ground cross-linked acid liquor is simple, further synthesis is not needed, the field operability is high, the cost is effectively reduced, and application of acid fracturing is further widened.
Owner:PETROCHINA CO LTD
Thickening agent used for water base fracturing fluid and synthetic method thereof
InactiveCN103059828ASuitable for production increase transformationGood sand carrying performanceDrilling compositionWater basedWater insoluble
The invention discloses a thickening agent which is provided with a branched chain structure and used for water base fracture. The thickening agent is composed of six monomers in a copolymerization mode. The six monomers comprise N, N-dimethyl acrylic amide (AAM), dimethyl diallyl ammonium chloride (DADMAC), acrylonitrile (AN), methacrylic acid (AA), 2-acrylic amide-2-methyl propane sulfonate (AMPS) and N-VINYL-2-pyrrolidone (PVN). Further disclosed is a preparation method of the thickening agent with the branched chain structure. Compared with the prior art, the thickening agent has the advantages of being low in residue, temperature resistant, prone to dissolution, anti-shearing and good in sand carrying property. The hyperbranched molecule fracturing fluid thickening agent completely solves the problems that vegetable glue fracturing fluid is high in damage and friction, general polymer fracturing liquid is not resistant to shear and incomplete in gel breaking, and the like. The thickening agent is not like vegetable glue which contains a large amount of water insoluble matters, completely dissolved in a fracturing liquid stock solution, basic zero in the water insoluble matters and free of containing solid phase composition. The obtained fracturing liquid stock solution is glittering, translucent and bright. After gel is broken, compared with a vegetable glue fracturing liquid system, contend of residue is greatly reduced. The thickening agent has the advantages of being less in residue content, low in use viscosity, good in sand carrying property, low in cost, convenient to flow back and the like.
Owner:NANTONG KEYI CHEM
Preparation method of High-temperature water base fracturing fluid
ActiveCN103965857AGood temperature and shear resistanceStable high temperature rheological propertiesDrilling compositionWater basedEmulsion
The invention relates to a high-temperature water base fracturing fluid and a preparation method thereof. The fracturing fluid is prepared from the following additives by weight: 0.45-1.0% of a thickening agent, 0.6-1.5% of a clay stabilizer, 0.6-1.5% of an emulsion breaking cleanup additive, 0.01-0.03% of a gel breaking agent, 0.6-2.0% of a crosslinking agent and the balance of sea water, wherein the total sum weight percentages of the components is 100%. The fracturing fluid has the advantages of good sand carrying capability, good heat resistant and shearing resistant performances, good compatibility with formation fluid and small reservoir damage; seawater can be used directly to prepare the solution; and conventional liquid dispensing equipment and process are employed to solve the problem of lack of freshwater in offshore fracturing construction. The invention improves working efficiency of offshore fracturing, reduces the cost, and lays the foundation for the large-scale offshore fracturing operation.
Owner:BC P INC CHINA NAT PETROLEUM CORP +2
Organic titanium crosslinking agent, and preparation method and application method thereof
The invention provides an organic titanium crosslinking agent, and a preparation method and application method thereof. The preparation method comprises the following steps: adding 90-110 parts by mass of tetrabutyl titanate into a reactor, heating to 60-80 DEG C, adding 70-90 parts of triethanolamine into the reactor while stirring, reacting for 30-60 minutes, adding 70-90 parts of glycerol, and reacting at 60-80 DEG C for 150-200 minutes. The application method comprises the following steps: mixing the organic titanium crosslinking agent with an organic boron crosslinking agent to obtain a mixture, adding the mixture into a 0.3 wt% guar gum solution or konjak gum solution, and stirring to obtain a fracturing fluid. The fracturing fluid prepared from the organic titanium crosslinking agent and organic boron crosslinking agent has the advantages of high temperature tolerance, high shearing resistance, low residue content and small damage to the stratum after viscosity breaking, and the like.
Owner:SHAANXI UNIV OF SCI & TECH
Water base guanidine gum fracturing fluid and preparation method thereof
The invention provides water base guanidine gum fracturing fluid, and belongs to the field of oil field fracturing technologies. The water base guanidine gum fracturing fluid comprises the following ingredients: guanidine gum derivative, cross-linking agents, gel breakers, thickening agents, PH value adjusting agents and water. The invention further provides a water base guanidine gum fracturing fluid preparation method. The method includes the following steps of (1) dissolving gelatinizing agents in the water, evenly mixing, and obtaining thickened water; (2) dissolving the cross-linking agents in the water, evenly mixing and obtaining cross-linking agent water solution; (3) adjusting the PH value of the thickened water to 9-10, then slowly adding the cross-linking agent water solution into the thickened water to obtain jelly solution; (4) and adding the thickening agents into the jelly solution, and finally adding the gel breakers to obtain the water base guanidine gum fracturing fluid. The water base guanidine gum fracturing fluid is low in sludge content after gel breaking, and meanwhile the cost of the water base guanidine gum fracturing fluid is greatly reduced.
Owner:BEIJING RECHSAND SCI & TECH GRP
Multifunctional composite fracturing liquid system
ActiveCN105219372AStrong shear resistanceSimple recipeDrilling compositionHigh concentrationOrganic synthesis
The invention provides a multifunctional composite fracturing liquid system. The multifunctional composite fracturing liquid system comprises resistance reduction water and high-viscosity sand carrying liquid, wherein the resistance reduction water comprises 0.02 to 0.15 percent by weight of the resistance reduction agent; the high-viscosity sand carrying liquid comprises 0.2 to 0.75 percent by weight of a thickening agent; the resistance reduction agent and the thickening agent are identical aggregation polymer and are natural modified aggregation polymer and / or organic synthetic aggregation polymer. The low-concentration aggregation polymer having good resistance reduction performance and the high-concentration aggregation polymer having good sand carrying performance are used for forming the multifunctional composite fracturing liquid system; compared with the existing composite fracturing liquid system, the multifunctional composite fracturing liquid system has characteristics of fewer types of additives, simple formula and simple preparation process; meanwhile, the system has good resistance reduction performance, shear resistance and sand carrying performance; return liquid of the system can be reused after being treated in a way such as flocculating, precipitating and filtering, and the utilization rate of water for fracturing is increased.
Owner:SICHUAN GUANGYA POLYMER CHEM
Guanidine gum fracturing fluid system
The invention discloses a guanidine gum fracturing fluid system. The system comprises a base solution and a cross-linking agent, wherein the weight ratio between the cross-linking agent and the base solution is 0.3-0.8%, the base solution comprises 0.2-0.45% of modified guanidine gum thickening agents, 0.15-0.2% of efficient discharge aiding agents, 0.2-0.5% of efficient clay stabilizers, 0.05-0.1% of bactericides, 0.05-0.15% of efficient gel breakers, and the balance water, and the sum of the weight percentages of all the constituents is 100%. By the adoption of the system, usage mount of guanidine gum is reduced, and therefore residue rate is small, reservoir damage is light, and reservoir protection is facilitated.
Owner:BC P INC CHINA NAT PETROLEUM CORP +2
Preparation method of potassium persulfate microcapsule gel breaker
ActiveCN105670598AGood film formingPromote degradationDrilling compositionParaffin waxPotassium persulfate
The invention discloses a preparation method of a potassium persulfate microcapsule gel breaker. The method includes: (1) preparing a 5-20 mass% gelatin solution; (2) under 45DEG C constant temperature and constant speed stirring, measuring liquid paraffin into a three-mouth flask, adding a stabilizer, and mixing the substances evenly into a continuous phase medium; (3) weighing potassium persulfate powder and slowly adding it into the continuous phase medium, conducting 45DEG C constant temperature water bath stirring to disperse the substances evenly so as to form a stable suspension system; (4) slowly adding the gelatin solution into the suspension system, conducting 45DEG C constant temperature stirring at a uniform speed to form a stable latex solution; (5) transferring the latex solution into ice bath to performing constant speed stirring, adding a dehydrating agent isopropanol and a crosslinking agent formaldehyde; and (6) removing the upper oil phase, and subjecting the lower solid microcapsule to washing, pumping filtration and drying. The method provided by the invention has reliable principle and is easy to operate, the prepared microcapsule gel breaker has good sphericity, uniform and controllable particle size distribution, high effective content, and slow-release property, can be used for gel breaking of oil field water-based fracturing fluid, and has broad market prospect.
Owner:SOUTHWEST PETROLEUM UNIV
Guar gum cleaning fracturing fluid with micro residue and weak damage
InactiveCN106905948AUse low concentrationReduce harmDrilling compositionPolymer scienceSulfate radicals
The invention relates to guar gum cleaning fracturing fluid with micro residue and weak damage. The guar gum cleaning fracturing fluid with micro residue and weak damage is composed of base liquid, a cross-linking agent and a gel breaker, the base liquid is composed of hydroxypropyl guar gum, a cleanup additive, an anti-swelling stabilizing agent, a fracturing bactericide, a fracturing de-emulsifier, a scale inhibitor and water. According to the invention, a guar gum multinucleated cross-linking agent with low amount is used, delay crosslinking effect is strong, guar gum concentration is greatly reduced, glue breaking residue amount is reduced, a multifunctional scale inhibitor is cooperated for preventing fouling generated by water used for fracturing liquid and stratum water, a selective polymer fracturing catalyst capable of thoroughly breaking glue and no generating sulfate radical is selected, liquid viscosity and residue content are reduced, the surface tension of the gel breaker after gel is broken is lower, the gel breaker is easily discharged, the formed guar gum multinucleated cross-linking agent has good temperature and shearing sustainability, and excellent proppant carrying capacity.
Owner:SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
Vegetable gelatin fracturing fluid and preparation method thereof
Owner:新疆力科石油化工技术服务有限公司
Mixed gas foam cracking liquid system and preparation thereof
The invention provides a mixed gas foam cracking liquid system and preparation thereof. The mixed gas foam cracking liquid system comprises a gas phase and a liquid phase according to a volume ratio of (2 to 5):1, wherein the gas phase is nitrogen gas; on the basis of 100% of total weight of liquid phase, the liquid comprises the following components in percentage by weight: 0.8 to 1.2% of foamingagent, 0.3 to 0.8% of thickener, 0.8 to 1.2% of foam stabilizer, 45 to 55% of liquid carbon dioxide, and the balance of simulating stratum water. The mixed gas foam cracking liquid system has the advantages that the energy increasing, viscosity increasing, foaming and foam stabilizing functions are integrated, and the mixing advantage of carbon dioxide and nitrogen is fully realized.
Owner:CHINA UNIV OF PETROLEUM (BEIJING) +1
Superhigh temperature weighted fracturing fluid and preparation thereof
ActiveCN104232059AIncrease liquid viscosityImprove temperature resistanceDrilling compositionFracturing fluidCross linker
The invention belongs to a superhigh temperature weighted fracturing fluid and preparation thereof. The liquid is prepared from the following raw materials in parts by weight: 500 parts of water, 12-15 parts of a temperature-resistant thickener, 15-30 parts of a high-temperature crosslinking agent, 125-195 parts of an inorganic weighting agent, 20-30 parts of a discharge aiding agent, 8-15 parts of a bactericide, 5-10 parts of a temperature stabilizer and 0.1-0.3 part of a gel breaker, wherein the temperature-resistant thickener is carboxymethyl and hydroxypropyl guanidine glue, the high-temperature crosslinking agent is an organic zirconium crosslinking agent, and the inorganic weighing agent is any one of sodium chloride or sodium bromide. The superhigh temperature weighted fracturing fluid has the advantages of low content of residues and good temperature resistance and shear resistance.
Owner:北京国海能源技术研究院
Quick-dissolving type seawater-based high-temperature fracturing fluid
InactiveCN106350053AFast dissolutionFacilitate offshore fracturing reconstructionDrilling compositionEmulsionFracturing fluid
The invention discloses a quick-dissolving type seawater-based high-temperature fracturing fluid. The quick-dissolving type seawater-based high-temperature fracturing fluid is prepared by, by weight percentage, 1.0-2.5% of emulsion type thickening agent, 0.5-2.0% of crosslinking agent, 0.05-0.1% of phase inversion agent, 0.4-1.6% of discharge-aiding agent, 0.3-0.8% of clay stabilizer, 0.01-0.03% of gel breaker and the balance seawater, wherein the sum of the weight percentage of the components is 100%. The quick-dissolving type seawater-based high-temperature fracturing fluid has the advantages that the fracturing fluid is excellent in high temperature resistance and shearing resistance, capable of satisfying the construction technological requirements of offshore high-temperature reservoir fracturing transformation of at least 1800 DEG C, outstanding in high-temperature rheological property, stable in shearing resistance and beneficial to sand-carrying fracture making; the emulsion type thickening agent is fast in dissolving and can be prepared and used on site, and the offshore fracturing transformation construction is facilitated greatly.
Owner:安徽炎胜新材料科技有限公司
Weighted fracturing fluid
The invention provides a weighted fracturing fluid. The weighted fracturing fluid is a liquid system prepared by using the following raw materials, by weight, 29-70.5 parts of a weighting agent, 0.2-0.8 parts of a vegetable glue thickener, 0.1-0.8 parts of a cleanup additive, 0.02-0.15 parts of a bactericide, 0.05-0.3 parts of a pH value adjusting agent, 0.1-0.7 parts of a cross-linking agent, 0.03-0.2 parts of a gel breaker and 29.5-71 parts of water. The density of the fracturing fluid at room temperature is 1.22-1.62g / cm<3> or more; the temperature resistance capability of the fracturing fluid can reach above 200DEG C; and the fracturing fluid has the characteristics of cross-linking delaying, low frictional resistance, good cross-linking performance, strong temperature and shear resistance, low filter loss, thorough gel breaking, low residue content, good expansion resistance and the like.
Owner:CHINA PETROLEUM & CHEM CORP +1
Low damage carboxymethyl hydroxypropyl guanidine gum foam fracturing fluid of low permeability gas reservoir and preparation method of low damage carboxymethyl hydroxypropyl guanidine gum foam fracturing fluid
The invention relates to the technical field of fracturing and production increasing of an oil well or natural gas well, and in particular relates to a low damage carboxymethyl hydroxypropyl guanidine gum foam fracturing fluid of a low permeability gas reservoir and a preparation method of the low damage carboxymethyl hydroxypropyl guanidine gum foam fracturing fluid. The low damage carboxymethyl hydroxypropyl guanidine gum foam fracturing fluid of the low permeability gas reservoir contains the following components in parts by weight: 100 parts of base solution, 0.2-0.5 part of cross-linking agent, 0.03-0.04 part of gel breaker, and liquid nitrogen, wherein the liquid nitrogen accounts for 5-7 percent of total volume of the base solution and the cross-linking agent. The base solution, the cross-linking agent and a gel breaker are pumped into an underground fracturing stratum, and the liquid nitrogen is pumped, the base solution, the cross-linking agent, the gel breaker and the liquid nitrogen are mixed uniformly on the underground fracturing stratum, thus the low damage carboxymethyl hydroxypropyl guanidine gum foam fracturing fluid reaches the purpose of fracturing operation, and has the advantages of low content of residue after fracturing, good gel breaking property, rapid flowback, little damage to reservoir stratum water, and good fracturing effect. According to the low damage carboxymethyl hydroxypropyl guanidine gum foam fracturing fluid, the production cost is lowered, and the working efficiency is increased.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1
Alcohol-containing fracturing fluid and preparation method and application thereof
ActiveCN112391154AImprove solubilityHigh viscosityFluid removalDrilling compositionAlcohol ethylFracturing fluid
The invention belongs to the field of oil field fracturing fluid, and particularly relates to an alcohol-containing fracturing fluid and a preparation method and application thereof. The alcohol-containing fracturing fluid comprises ethanol, ethylene glycol, water, a thickening agent and a cross-linking agent. By adding ethanol, the phenomenon that part of properties become poor due to addition ofethylene glycol into the fracturing fluid can be improved, and along with increasing of the content of ethanol, the viscosity of the ethanol-ethylene glycol-water mixed solvent fracturing fluid is increased, the temperature resistance is good, the sand carrying capacity is enhanced, the viscosity of the gel breaking fluid is reduced, and the content of residues is reduced.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Acid-resistant resistance reducing agent, preparation method thereof and acid-resistant slickwater fracturing fluid system
ActiveCN111748054AImprove temperature resistanceImprove solubilityDrilling compositionRock coreFracturing fluid
According to the acid-resistant resistance reducing agent, the preparation method of the acid-resistant resistance reducing agent and the acid-resistant slickwater water fracturing fluid system. A hydrophobic monomer is introduced into the molecular structure, so that the system has good rheological and gel breaking performance in an aqueous solution, the technological requirements of long-crack and high-sand-ratio construction can be met, and the fracturing fluid has good temperature resistance under the acid condition; moreover, the thickening agent has a rapid dissolving property in an acidsolution, and can meet the technological requirements of industrial operation construction. The acid-resistant slickwater fracturing fluid system prepared from the acid-resistant resistance reducingagent is completely degraded at the reservoir temperature, damage to a reservoir is reduced, the fracturing fluid system has low surface and interface tension and residue content, rock core permeability damage is low, and good reservoir adaptability is shown.
Owner:PETROCHINA CO LTD
Supramolecular fracturing fluid system for imbibition oil recovery and application of supramolecular fracturing fluid system for imbibition oil recovery
ActiveCN110643343AImprove oil conductionImprove wettabilityDrilling compositionFracturing fluidEngineering
The invention discloses a supramolecular fracturing fluid system for imbibition oil recovery and application of the supramolecular fracturing fluid system for imbibition oil recovery. The supramolecular fracturing fluid system for imbibition oil recovery is composed of the following components in percentage by weight: 0.2-0.7% of a supramolecular fracturing fluid thickener, 0.05-0.6% of a double-effect agent, 0.05-2% of a clay stabilizer, 0.05-0.4% of an efficient gel breaker and the balance water. The produced supramolecular fracturing fluid system for imbibition oil recovery is used for imbibition oil recovery work of a low-permeability tight oil reservoir, not only can the produced supramolecular fracturing fluid system for imbibition oil recovery be used as fracturing fluid for fracture forming and sand carrying, but also gel breaking liquid of the produced supramolecular fracturing fluid system for imbibition oil recovery can be used as imbibition liquid for changing the wettability of a reservoir matrix and reducing oil-water interfacial tension, and when imbibition oil recovery is conducted on the reservoir, through a method of combining fracturing and imbibition, not only is the imbibition recovery efficiency of the low-permeability tight oil reservoir improved, but also the problems that fracturing flow-back fluid is hard to treat, the recycling rate is low, and resources are wasted are solved.
Owner:SOUTHWEST PETROLEUM UNIV
Nano-composite fracturing fluid as well as preparation method and application thereof
ActiveCN107325805AImprove high temperature resistanceImprove shear resistanceDrilling compositionFoaming agentFracturing fluid
The invention provides a nano-composite fracturing fluid as well as a preparation method and an application thereof. The nano-composite fracturing fluid is prepared from components in parts by weight as follows: 0.1-3.0 parts of a nano-composite thickening agent, 0.1-0.5 parts of a structure regulator, 0.1-1.0 part of a clay stabilizer, 0.1-1.0 part of a cleanup additive, 0.1-1.0 part of a foaming agent, 0.1-2.0 parts of an organic crosslinking agent, 0.01-0.5 parts of a gel breaker and 90.0-99.39 parts of water. Due to interaction between the structure regulator and the nano-composite thickening agent, the nano-composite fracturing fluid has extremely excellent sand carrying performance, good high-temperature resistance and anti-shearing performance, can effectively break gel in situ under a formation condition, can form multiscale nano-composite micelle through separate nano-dispersion and nucleation processes, is applicable to oil and gas exploitation in various stratum environments and improves the oil and gas injection and exploitation efficiency.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
Juice pressing device of colorful noodle maker
InactiveCN107183099AWell mixedImprove efficiencyMixing/kneading structural elementsMixing/kneading with horizontally-mounted toolsEngineeringVegetable Juices
The invention discloses a juice pressing device of a colorful noodle maker. The top of the juice pressing device is provided with a feeding inlet, and one end of the juice pressing device is provided with a residue discharge outlet fixedly provided with an end cover through threads; a main shaft B inside the juice pressing device is driven through a driving device. According to the above structure, the juice pressing device of a colorful noodle maker presses vegetable juice out, and compared with juice squeezed by a juice extractor, the juice pressing device of a colorful noodle maker can effectively reduce the residue content in the juice, thereby guaranteeing the taste of colorful noodles.
Owner:CAOXIAN LUGONG MACHINERY CO LTD
Clean crushing liquid system
InactiveCN105273709ASimple recipeEasy to prepareFluid removalDrilling compositionCross-linkMaterial resources
The invention provides a clean crushing liquid system fit for prolonging the low-temperature and low-permeability reservoir of oil field. The clean crushing liquid system comprises the following components by weight percent: 0.3%-0.4% of thickening agent, 0.15%-0.2% of synergist, 0.5%-1.0% of anti-swelling agent, 0.1%-0.3% of gel breaker and the balance of water, wherein the hydrophobic group modified polyacrylamide and / or derivatives thereof is served as the thickening agent. Compared with the prior art, the clean crushing liquid system has the advantages that the clean crushing liquid is not cross-linked and belongs to non-cross-linking crushing liquid; the construction friction resistance is low; the anti-shearing ability is strong; the content of the residues after the gel breaking is low; the harm to the floor layer is small; the formula of the crushing liquid is simple; the preparation process is simple and convenient; a large amount of manpower and material resources can be saved during a crushing construction process.
Owner:YANCHANG OIL FIELD +1
Method for preparing acid liquid system
The invention provides a method for preparing an acid liquid system. The method comprises the following steps: 1) adding a thickening agent into a hydrochloric acid solution at a first stirring speed,and stirring at a second stirring speed to obtain a first acid liquid; 2) sequentially adding an iron ion stabilizer, a corrosion inhibitor and a demulsification cleanup additive into the first acidliquid, uniformly stirring at a third stirring speed, and standing to obtain a base solution; and 3) adding a tackifier into the base solution, and stirring at a fourth stirring speed to obtain the acid liquid system.
Owner:CHINA PETROLEUM & CHEM CORP +1
Fresh ginger juice production device
InactiveCN110226759AEfficient killingImprove cleanlinessJuice extractionFood treatmentEngineeringImpurity
The present invention relates to a fresh ginger juice production device. The fresh ginger juice production device comprises a loading system, a water washing system, an air drying system, a material pouring system, a material cutting system, a screening system, two material loading systems, a material crushing system and a juice squeezing system. Fresh gingers are subjected to high-temperature cooking and soaking in the water washing system, so that dust, residues and other materials on surfaces of the fresh gingers are washed away together, at the same time, various harmful micro-organisms carried on the surfaces of the fresh gingers are effectively killed in a large amount, at the same time, during a drying process, taken-away water takes fine residues and impurities away together, and finally, a shaking work of the drying system ensures that the whole fresh gingers are clean and free of impurities. The fresh gingers are successively treated by the material cutting system, screeningsystem and material crushing system into fresh ginger blocks of a same uniform size range and a small size, which maximally increases a contact specific surface area of the fresh ginger raw material,at the same time also enables the fresh ginger raw material not to produce unnecessary deterioration due to excessive processing to affect subsequent products.
Owner:王兴翠
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