280results about How to "Strong salt resistance" patented technology

The invention relates to a temperature-resistant salt-resistant composite foam oil displacement agent for tertiary oil recovery and a preparation method thereof, belonging to the field of chemical oil displacement for increasing the crude oil recovery ratio of the oil field. The oil displacement agent is compounded by 0.5-1% of alpha-alkene sulfonate as a main surfactant and other auxiliary agents and comprises the following components in percentage by mass:0.1-1.5% of anionic surfactant, 0.2-0.8% of zwitterionic surfactant, 2-10% of organic solvent, 5-12% of stabilizing agent and the balance of a salt solution added to be 100%. Compounds related to the oil displacement agent are industrially produced fine chemical products, the raw materials are easy to obtain, the production cost is low, and the preparation is simple; the oil displacement agent has performances of temperature resistance, salt resistance, ultralow interfacial tension and the like; the persistence of the foam is strong, and the half-life period can be more than 120min at 85 DEG C; the oil displacement age has excellent compatibility with other surfactants, and the comprehensive recovery ratio of the crude oil can be increased by about 10-15%.

The invention discloses a novel aluminum-based anti-collapse agent and provides a strong-inhibition and strong-blockage aluminum-based anti-collapse water-based drilling fluid system by combining the performance requirement of drilling fluid based on the novel aluminum-based anti-collapse agent. The strong-inhibition and strong-blockage aluminum-based anti-collapse water-based drilling fluid contains the following substances in parts by weight: 100 parts of fresh water, 4 parts of sodium bentonite, 0.1-1 part of a coating inhibitor, 0.3-5 parts of a strong amine inhibitor, 0.5-5 parts of a filtrate reducer, 0.3-1 part of a thickening agent, 1-5 parts of a lubricating agent and 0.5-5 parts of an efficient aluminum-based blocking agent. The key technique of the invention is to provide use of the aluminum-based anti-collapse agent as a mud rock blocking anti-collapse agent in drilling fluid. After an aluminum-based blockage anti-collapse agent acts with a rock core with same thickness, the time required for transferring differential pressure of 1MPa is substantially shortened in comparison with the time (about 1.5 hours) required for transferring differential pressure in a blank rock core, so that the aluminum-based blockage anti-collapse agent has excellent blockage performance. Compared with the prior art, the strong-inhibition and strong-blockage aluminum-based anti-collapse water-based drilling fluid has the following advantages that (1) an amine inhibitor has prominent inhibition performance, and the hydration dispersion inhibition capacity of shale of the drilling fluid system is strong; (2) the anti-collapse agent has prominent inhibition performance and strong blockage anti-collapse capacity, and the hydration expansion inhibition capacity of shale of the drilling fluid system is strong; (3) the water-based drilling fluid system has relatively good rheological property and strong temperature resistance, salt resistance and calcium and inferior soil pollution resistance; and (4) the system contains less treating agents and is simple to prepare and convenient to maintain.

The invention discloses an APG (alkyl polyglucoside) plant environmentally-friendly shampoo which comprises APG (alkyl polyglucoside), coconut oil 6501, water-soluble wool grease, cocamidopropylamine oxide, emulsified silicon oil softener, EDTA (ethyle, diamine tetraacetic acid), citric acid, sodium alginate, Germall, plant additive and water. The APG plant environmentally-friendly shampoo has the effects of effectively resisting hair dropping, blacking hair, shinning hair, nourishing hair, sterilizing, removing dandruff and relieving itching, has small skin irritation, and does not produce drug resistance after being used for long term.

The invention relates to a high-temperature oil-soluble temporary blocking agent. The high-temperature oil-soluble temporary blocking agent is characterized by comprising the following components in percent by weight: 10-40% of asphalt, 20-50% of C9 petroleum resin, 15-50% of coumarone resin, 5-15% of a surfactant, 2-15% of a polymer fiber and 1-10% of a softening-point additive. The preparation procedures of the high-temperature oil-soluble temporary blocking agent are as follows: firstly, adding the asphalt into a reactor, heating to melt the asphalt, adding the C9 petroleum resin and the coumarone resin into the reactor, stirring continuously until the substances in the reactor are fully melted, continuously adding the surfactant, the polymer fiber and the softening-point additive into the reactor, stirring for 30 minutes to mix uniformly, stopping heating a mixture, cooling, then collecting particles, washing, and screening to obtain the high-temperature oil-soluble temporary blocking agent with different particle sizes. The high-temperature oil-soluble temporary blocking agent provided by the invention overcomes the defect that the traditional oil-soluble temporary blocking agent can not resist high temperature. The high-temperature oil-soluble temporary blocking agent has good oil solubility, acid and salt resistance and high-temperature degradation resistance. The added softening-point additive is capable of regulating the range of the softening point, and thus an oil layer can be protected.

The invention relates to a salt tolerant corrosion and scale inhibitor for underground oil-gas wells and a preparation method thereof. The salt tolerant corrosion and scale inhibitor is composed of an oxazoline derivative, thiourea, cetyl pyridinium chloride, dodecyl dimethyl benzyl ammonium chloride, amino trimethylene phosphonic acid, hydroxyethylidene diphosphonic acid, hexamethylenetetramine, and methanol. The corrosion and scale inhibitor has very strong salt resistance, and under high salinity conditions (100000-200000mg / L), has a significant inhibiting effect on metal corrosion, and the corrosion inhibition rate can reach more than 80%. The organic phosphonic acid molecular structure of the reagent contain a double bond structure, the structure and the calcium ions and magnesium ions in water can chelate to form a stable complex to be adsorbed on seed crystal surface active sites, thereby inhibiting crystal normal growth. With significant scale inhibiting effect and a scale inhibiting rate up to 94%, the product is suitable for inhibiting corrosion and scaling phenomena of oil-gas well rods and pipes containing carbon dioxide, hydrogen sulfide and other complex media conditions under high salinity.

The invention relates to a gas oil base invert oil-emulsion drilling fluid and a preparation method, wherein the total volume of gas oil and calcium chloride aqueous solution is 100 parts: the volume ratio of oil phase to water phase is between 95:5 and 70:30, and the concentration of calcium chloride aqueous solution is 5%-saturation; the required gas oil, primary emulsion, auxiliary emulsion and wetting agent are added into a high speed mixing beaker, and are mixed at high speed for 2-5 minutes; the calcium chloride aqueous solution is added and mixed at high speed for 15 minutes; organic soil, calcium oxide and a fluid loss agent are added and mixed at high speed for 10 minutes; and the required amount of barite is added according to density, and is mixed at high speed for 25 minutes. The gas oil base invert oil-emulsion drilling fluid is used for overcoming the defects of the existing gas oil base drilling fluid and solving the problems of the salt resistance and temperature resistance of the gas oil base drilling fluid, and can resist the temperature above 200 DEG C.

The invention relates to a preparation method of a high-temperature-resistant high-salt polymer oil-replacement agent, which comprises the following steps: dissolving 10-20 parts by weight of anionic monomer, 50-65 parts by weight of sodium allylsulfonate, 11-22 parts by weight of cationic monomer, 2-4 parts by weight of acrylate, 0-3.5 parts by weight of alpha-alkene and 50-60 parts by weight ofacrylamide in deionized water, wherein the total mass concentration of the monomers is 15-23%; adding a surfactant which accounts for 1-5% of the total weight of the monomers, regulating the pH valueof the solution to 9-10, introducing ammonia gas at 30-60 DEG C for 30 minutes, and adding a persulfate initiator which accounts for 0.05-0.1% of the total weight of the monomers; and reacting at 30-60 DEG C for 12 hours, precipitating with acetone, washing, and carrying out vacuum drying to obtain the white powdery polymer. The invention is characterized in that long-carbon-chain alkyl group, anionic and cationic unit structures are introduced into the water-soluble polymer macromolecules to obtain the high-temperature-resistant high-salt water-soluble polymer oil-replacement agent.

The invention relates to a chemical bond connected strong cationic grafted amphoteric chitosan flocculant which is obtained by grafting strong cationic monomers to amphoteric carboxymethyl chitosan in an acidic condition through copolymerization. The chemical bond connected strong cationic grafted amphoteric chitosan flocculant is in such a structure as follows: in the chemical bond connected strong cationic grafted amphoteric chitosan flocculant, degree of substitution of a carboxylic acid group is 5-90%, methylacryloyl oxyethyl trimethyl ammonium chloride is a strong cationic monomer, and polymethylacryloyl oxyethyl trimethyl ammonium chloride accounts for 5-80% by mass of the chemical bond connected strong cationic grafted amphoteric chitosan flocculant. The flocculant provided by the invention has amphoteric characteristics, so that not only is the flocculant property improved, but also the dissolving property is improved. The raw material chitosan is wide in source, natural, non-toxic and degradable. The flocculant has multiple functions of good flocculation effect, metal ion absorption, bacteriostasis, deodorization, decoloration, and effective reduction of COD (Chemical Oxygen Demand) value and the like.

The invention discloses a preparation method of grafted amphoteric starch flocculants, which is implemented by carrying out graft copolymerization on cationic starches, acrylamide and an acrylic acid so as to obtain a grafted amphoteric starch flocculant, and the grafted amphoteric starch flocculant has the following structure shown in the abstract. The method disclosed by the invention has the following advantages that because a molecular chain is rich in anion-cation groups and has amphoteric characteristics, not only is the flocculation property of materials improved, and also the dissolving property of starches is improved; high polymer materials are wide in resource and low in cost, so that the grafted amphoteric starch flocculant has a high performance price ratio; starches have biodegradability and are non-toxic, so that starches do not produce secondary pollution to water bodies; the grafted amphoteric starch flocculant has various good effects such as flocculation, metal ion adsorption, bacteriostasis, deodorization, decoloring, and capability of effectively reducing the COD value; the grafted amphoteric starch flocculant has a characteristic of high efficiency, and is low in putting amount, and the putting amount is generally 0.1-10mg / L; and the the grafted amphoteric starch flocculant is suitable for treating water bodies with different charges, good in salt resistance and wide in applied pH range, and can be applied when the pH value is 1-12.

The invention discloses a method for preparing a high-stability heat-resistance and salt-tolerance air foam oil displacing agent. According to the method, a nanometer and nanometer modification technology is adopted, and nanometer hectorite is used as a foam stabilizer and a high-temperature stabilizer to prepare the high-stability heat-resistance and salt-tolerance air foam oil displacing agent. The technology includes the following steps that the hectorite is added into deionized water at the temperature of 50-90 DEG C, stirred and dispersed evenly, cooled to the room temperature and stewed and aged for a period of time to obtain hectorite aqueous dispersion, quantitative cationic surface active agents are added, evenly stirred, stewed and aged, finally, foaming agents are added, high-speed stirring is conducted on a high-speed emulsification machine, and the high-stability heat-resistance and salt-tolerance air foam oil displacing agent is obtained. The foam half-life period reaches up to 768 hours, the high foam stability is achieved, the foam half-life period reaches up to 70 hours under the condition that the degree of mineralization is 30000 mg / L, the good salt tolerance is achieved, the apparent viscosity reaches up to 2000 mPa.s, the heat resistance performance reaches 90 DEG C, the high foam strength and the heat resistance are achieved, the shearing rate is 170 per second, the foam apparent viscosity reaches 800 mPa.s after shearing is conducted for 60 minutes, the good shearing performance is achieved, and the method is suitable for exploration and development of conventional and unconventional oil fields.

The invention relates to a preparation method of a polymer weak gel deep profile control agent. The preparation method comprises the following steps of preparing sodium carboxymethyl cellulose and distilled water into sodium carboxymethyl cellulose water solution of which the mass percentage is 1%-2%; adding acrylamide of which the mass is 2-8 times as great as that of the sodium carboxymethyl cellulose into the sodium carboxymethyl cellulose water solution, and then adding a cross-linking agent which accounts for 0.01%-2% of the total weight of the sodium carboxymethyl cellulose and the acrylamide; enabling nitrogen to enter into a closed system and isolating the air, and adding an initiating agent which accounts for 1%-2% of the total mass of the sodium carboxymethyl cellulose and the acrylamide; and discharging after carrying out constant-temperature reaction for 4-12 hours under the temperature of 30-60 DEG C. According to the preparation method disclosed by the invention, the acrylamide is grafted to the sodium carboxymethyl cellulose, polymer weal gel with a mesh structure is formed under the action of the initiating agent and the cross-linking agent, and a polymer weak gel system integrates the advantages of the sodium carboxymethyl cellulose and the acrylamide.

The invention discloses biological environment-friendly hair-darkening and hairloss-preventing shampoo and a preparation method thereof. The shampoo contains alkyl polyglucoside (APG), coconut oil, water soluble wool oil, cocoamido propyl betaine, tea seed oil, ethylenediaminetetraacetic acid (EDTA) disodium, citric acid, sodium alginate, genma and plant hair-darkening and hairloss-preventing essence. The shampoo can effectively prevent hair loss, darken and brighten hair, remove dandruff and relieve itching, is less irritant to skin and can be used for a long time without causing medicine resistance.

The invention discloses a hydrophobically associated polymer-composite surfactant binary combination flooding system and method. The hydrophobically associated polymer-composite surfactant binary combination flooding system mainly comprises the following components in percentage by weight: 0.08-0.3 wt% of hydrophobically associated polymer, 0.05-0.5 wt% of composite surfactant and 99.2-99.87 wt% of water. The composite surfactant is composed of the following components in percentage by weight: 50-70 wt% of fatty acid diester disulfonate and 30-50 wt% of oleic acid diglycollic amide. The hydrophobically associated polymer-composite surfactant binary combination flooding system has favorable tackifying property, and enables the oil-water interfacial tension to reach 10<-3>nM / m under low surfactant concentration (0.05%), thereby enhancing the displacement efficiency; and the hydrophobically associated polymer-composite surfactant binary combination flooding system can enhance the recovery rate by more than 30% on the basis of water flooding, lowers the polymer consumption by more than 50% as compared with the 250-million ultrahigh-molecular-weight polyacrylamide binary combination flooding system with close properties, and enhances the recovery rate by 6%, thereby greatly lowering the oil displacement cost on the premise of increasing the yield.

The invention provides an underground gel-forming blocking agent suitable for medium-high temperature high-salt low-permeability reservoirs and a preparation method therefor. By taking the total weight of the blocking agent as reference, the blocking agent comprises the following raw materials: 1% to 4% of water-soluble phenol-formaldehyde resin, 0.5% to 2% of stabilizer, 0 to 10% of flexibilizer and the balance of water. The preparation method of the blocking agent comprises the following steps: selecting the raw materials in proportion, and uniformly mixing so as to obtain the underground gel-forming blocking agent suitable for the medium-high temperature high-salt low-permeability reservoirs. The blocking agent provided by the invention is a homogeneous-phase, transparent and low-viscosity water solution before gel forming; the blocking agent can be selectively injected in a deep stratum water flow preferential migration passage, the shearing, adsorption and chromatographic separation of a stratum for the blocking agent can be ignored, and deep placement does not influence the concentration ratio of the blocking agent; and the polycondensation is delayed at the high temperature in the deep stratum, so that the formed gel has the advantages of high blocking rate, high blocking strength, water flow impact resistance, high temperature resistance and high hydrolysis resistance.

The invention provides a preparation method of a multifunctional emulsion type drag reducer for shale gas fracturing. The preparation method comprises steps as follows: (1) firstly, an aqueous phase is prepared from water, anionic monomers, nonionic monomers and cationic monomers, the anionic monomers are added to the water, the mixture is neutralized to have the pH of 7 by the aid of a functional base, and then the nonionic monomers, the cationic monomers and an aid are added; (2) an oil phase is prepared from a solvent and an emulsifier which accounts for 5%-20% of the solvent in mass; (3) the aqueous phase and the oil phase are mixed, the water accounts for 10%-60% of the mixture in mass in the aqueous phase and oil phase mixture, high-speed shearing emulsification is performed, and then an initiator is slowly added at the reaction temperature of 20-80 DEG C under protection of nitrogen so as to initiate an emulsion polymerization reaction; (4) after the reaction is ended, a product is cooled to the room temperature, a low-surface-tension reverse phase agent is added, and the multifunctional drag reducer is obtained. The preparation method has the benefits as follows: the anti-swelling ability is outstanding, the discharge aiding effect is good, the drag reducer is multifunctional, and construction is convenient.

The invention discloses a high-temperature resistant secondary cross-linked gel profile control agent and a preparation method thereof, and belongs to the technical field of oilfield chemistry. The profile control agent has good gelling property and high plugging strength and can resist high temperature of 150 DEG C, and the gelling strength and the gelling time can be adjusted. The high-temperature resistant secondary cross-linked gel profile control agent is mainly characterized by the secondary composite crosslinking process, that is, a plugging agent reacts with a first crosslinking agent under the ground condition to form flowable gel similar to weak gel so as to reduce filter loss of the plugging agent in oil deposit during the construction process and reduce the risk of blocking a low-permeability oil flow channel by the plugging agent; and a second crosslinking agent has a second crosslinking reaction under the high-temperature condition of an oil layer to form high-strength gel so as to effectively plug a high-permeability steam flowing channel, and accordingly, steam suction is controlled, and the sweep efficiency is improved. Gelling of the high-temperature resistant secondary cross-linked gel profile control agent is characterized in that micromolecules are inserted into organic macromolecular materials HPAM, and micromolecules and macromolecules mutually permeate, so that a gel system easily performs sizing; and meanwhile, temperature resistance, salt resistance, shear resistance and ageing resistance are enhanced, and the system performance can be well played.

The invention discloses an efficient salt-resistant dual-purpose thickening agent, a preparation method and application thereof. The preparation method of the thickening agent comprises the followingsteps of: S1, preparing a water phase; S2, preparing an oil phase; S3, performing emulsifying; S4, conducting polymerization; and S5, carrying out aftertreatment. A hydrophobic monomer, a functional monomer and a salt-resistant monomer are introduced into the thickening agent to form a compact and complex spatial network structure in an aqueous solution, so that the thermal stability and the saltresistance of the thickening agent are improved, and the aqueous solution of the thickening agent can keep relatively high viscosity under a hypersalinity condition. Due to the addition of a chain extender, the molecular chain of the polymer is longer, and the viscosity is greatly improved. A cosolvent is introduced, so that the dissolving speed of a polymer emulsion is further increased, the polymer emulsion can be completely dissolved in 30 seconds, the requirement on water quality is low, and the polymer emulsion can be prepared from oilfield reinjection water and oilfield wastewater. Due to the addition of a suspending agent, the emulsion system is more stable, and the emulsion is not layered within two years. The thickening agent also has the characteristic of dual purposes, and can be used as a fracturing fluid slickwater drag reducer and a fracturing fluid thickening agent.

The invention discloses an emulsifying and flushing spacer fluid for improving the cementing quality of an oil-based drilling fluid and a preparation method of the emulsifying and flushing spacer fluid. The spacer fluid is prepared from the following components in parts by weight: 200 parts of water, 5-10 parts of a surfactant, 70-75 parts of base oil, 4-15 parts of a suspension stabilizer, 0.2-3.0 parts of a fluid loss agent, 0.2-2.0 parts of a tackifier, 0.2-5.0 parts of a diluent, 80-400 parts of a weighting agent and 0.05 part of a defoamer, wherein the surfactant is prepared from cocoanut fatty acid diethanolamide CDEA and alkyl glycoside APG in a weight ratio of 1: 2. The emulsifying and flushing spacer fluid which has an emulsifying structure with permeating, dissolving, volume-increasing, carrying functions and the like has a preferable flushing capacity to the oil-based drilling fluid and mud cakes adhered to a casing wall. The surfacant molecules in the spacer fluid can be adsorbed on the surfaces of a casing and a well wall to improve the interfacial wettability, so that cement slurry and the casing and the well wall are better contacted and cemented, and therefore, the first and second interfacial cementation qualities for well cementation are improved.

The invention discloses a preparation method of a depolymerized and dispersed viscosity reducer of heavy oil. The preparation method comprises selecting N,N-Dimethyloctadecylamine as a hydrophobic group monomer, and diethylene triamine, epoxy chloropropane and benzyl chloride as hydrophilic group monomers, and ethanol as a solvent. The preparation method sequentially comprises the following steps: (1) adding the N,N-Dimethyloctadecylamine (N,N-Dimethylhexadecylamine) and the ethanol to a reaction vessel with a stirring device, evenly mixing and keeping the mixture at constant temperature for 0.5h; (2) slowly dripping the epoxy chloropropane with a dropping funnel to the reaction vessel, heating to 70 DEG C-75 DEG C, and reacting for 1-4h to generate HDI-1; (3) dripping the epoxy chloropropane to the diethylene triamine at room temperature to generate HDI-2; (4) allowing reaction products in (3) and (2) to react to generate HDI-3; and (5) dripping the benzyl chloride with the dropping funnel to the HDI-3, evenly stirring the mixture, and reacting at increased temperature of 90-95 DEG C for 2-5h to obtain the target product HD.

The invention relates to a viscosity reducer by emulsification for heavy oil. The viscosity reducer comprises the following components: a nonionic surfactant, an anionic oligomeric surfactant, alcohol and water; the alcohol is C1-C8 alcohol, the anionic oligomeric surfactant comprises a structure shown in the formula (I), wherein n is any integer from 1 to 6, R is alkyl, and M is at least one from Li+, Na+ and K+. The viscosity reducer by emulsification for heavy oil has the advantages of good viscosity reducing effects for heavy oil, good salt resistance, low usage concentration, and low cost; alkali is not needed during usage, and the viscosity reducer by emulsification for heavy oil is suitable for stratum which is sensitive to alkali.

The invention relates to a hydrophobic association zwitterionic polymer and a preparation method thereof. The preparation method comprises the following steps: adding acrylamide, acrylic acid and cationic monomers containing quaternary ammonium groups sequentially into a reactor; adding water and dissolving; adjusting the pH value of a system to be 6 to 9 by using NaOH; supplementing deionized water to enable the total monomer mass percentage of the reaction system to be 10 to 30%; adding surfactant lauryl sodium sulfate and stirring uniformly; adding an acrylamide hydrophobic monomers containing capsaicin functional groups; introducing N2 for 20 minutes; and adding a water-soluble initiator and performing polymerization reaction to obtain the hydrophobic association zwitterionic polymer. The positive charge content and the negative charge content of the hydrophobic association zwitterionic polymer prepared with the method are equal, a solution of the polymer has an antipolyelectrolyte effect, and the hydrophobic association zwitterionic polymer has excellent salt resistance. The introduced hydrophobic units containing the capsaicin functional groups have bioactivity and adopts a rigid benzene ring structure, so that the polymer has excellent tackifying property, temperature resistance, salt resistance and anti-microbial property, high dissolution speed and low price, and has an excellent application prospect in petroleum reservoir exploitation under the conditions of high temperature, high salt and bacteria in existence.

The invention relates to a method for preparing an amphoteric chitosan flocculating agent. The method comprises the following steps that: chitosan is dissolved in an acrylic aqueous solution with a mass percentage concentration of between 0.1 and 1 percent so as to prepare a solution with a mass percentage concentration of chitosan of between 1 and 3 percent; the acquired solution is added with an ammonium ceric nitrate evocating agent, and is added with acrylamide; a mass ratio of the acrylamide to the chitosan is 1 to 1-8 to 1; and a mixture reacts for 2 to 4 hours at a temperature of between 45 and 65 DEG C, thereby preparing the amphoteric chitosan flocculating agent. The amphoteric chitosan flocculating agent prepared by the preparation method has the dual characteristics of having anionic groups and cationic groups, is suitable for processing a water body with different charges, has good salt resistance and wide application range and can be used both in an acid medium and an alkali medium. The method has simple operation, short synthetic time and low cost, uses natural macromolecular products with rich sources as main raw materials and is suitable for large industrialized production; and the method is an economic method for preparing and acquiring a high-quality water treatment agent.

The invention discloses a preparation method of a tackifier for a drilling fluid. The method comprises the following steps of: adding 71 kg of acrylamide and 700 kg of water into a polymerizing kettle, preparing a 20 percent acrylamide aqueous solution, adding 0.1 kg of initiator after a certain period of time, and reacting at constant temperature for a certain period of time to obtain gel polyacrylamide; taking the gel polyacrylamide out, pelletizing, and preparing into 2 percent polyacrylamide aqueous solution; adjusting the pH of a system to 11 with a sodium hydroxide solution, adding 85 kg of formaldehyde and 100 kg of sodium bisulfite aqueous solution, and reacting with stirring for a certain period of time to obtain sulfomethylated polyacrylamide gel; precipitating and separating reactants with 95 percent ethanol, and recycling and distilling an ethanol aqueous solution for circular use; and taking a precipitated polymer, removing ethanol, drying in vacuum and crushing to obtain a product. The tackifier has large tackifying and flow pattern adjusting capabilities, and can be used for keeping the viscosity of the drilling fluid under severe conditions such as high temperature, high salinity, high calcium-magnesium ions and the like.

The invention discloses a washing composition as well as a preparation method and application of the washing composition. The washing composition is prepared by taking water, alkyl polyglucoside, propylene glycol, alkyl betaine, sodium lauryl sulfate, flos lonicerae extract, chrysanthemum extract, radix sophorae flavescentis extract, mint extract, table vinegar (edible acetic acid), table salt, edible essence and a thickening agent as raw materials, and has the functions and characteristics of sterilization and disinfection, oil removal and stain removal, itching stopping and skin protection, odor removal and deodorization, low foam, and capability of being cleaned by washing; meanwhile, alcohol, an alkali, a preservative and other disinfection components are not added, so that a functional skin-protection daily chemical washing product, which can be used for naturally killing viruses and sterilizing, removing oil and dirt, stopping itching and dandruff, resisting allergy and protection skins, and has a medicine effect, is obtained.

The invention provides a high-efficiency air foam oil displacement system. The high-efficiency air foam oil displacement system is characterized in that the high-efficiency air foam oil displacement system is prepared by return water of oilfields, and is prepared by the following raw materials in percent by mass: 0.12% of perfluorocarbon 101005 foaming agents, 0.08% of dodecyl phosphate hydroxypropyl betaine, 0.1% of surfactant BS betaine, and the balance partially hydrolyzed polyacrylamide. The oil displacement system has excellent adaptation on high-salinity and high-oil sewage returned from the oilfields, is high in compatibility, high in salt tolerance and excellent in foaming characteristic and stability; a displacement section can be effectively adjusted; interfacial tension is reduced; swept volume is increased; and recovery efficiency of the oilfields is improved.

The invention discloses a hypersalinity solid-free micro-foam drilling fluid or completion fluid. The drilling fluid is prepared from the following raw materials in parts by weight: (1) 0.3-0.6 parts of a tackifier, (2) 0.3-0.5 parts of a foam stabilizing agent, (3) 0.7-1.1 parts of a foaming agent, (4) 2-3 parts of a filtrate reducer, (5) 0.3-0.5 parts of a flow-pattern adjusting agent, (6) 0.2-0.3 parts of sodium carbonate and (7) 100 parts of a base fluid. The preparation method comprises: successively adding the compositions (1)-(6) according to the weight ratio into the composition (7) under the conditions of normal temperature, normal pressure and mechanical stirring in a routine manner, and stirring for 2-6 h after all compositions are added. The related hypersalinity solid-free micro-foam drilling fluid or completion fluid has excellent rheological performance, relatively good filtrate reducing performance and relatively good stability, and is applicable to well-drilling or well-completion construction of high-salinity (salt bed), low-pressure and easily-leaked stratums.

The invention relates to a chemical industry wastewater comprehensive treatment method which comprises a pretreatment system, a primary biochemical system, an ozone treatment system, a secondary biochemical system and an after-treatment system. By adopting the two biochemical treatment systems, the iron carbon treatment system is arranged before the primary biochemical treatment system, and the ozone treatment system is arranged between the two biochemical treatment systems so as to greatly enhance the biodegradability of the wastewater, so that the treated wastewater can satisfy the direct discharge requirement. The method is suitable for comprehensive treatment of various types of chemical industry wastewater, has the advantages of low treatment cost, high technical stability, high pollutant removal rate, stable and standard effluent water quality and the like, and is suitable to be widely used in chemical industry wastewater treatment.

The invention discloses an anti-collapse and anti-leakage drilling washing fluid used during drilling and a field production method thereof, belongs to the technical field of geological core drilling technology, and aims to solve the problem that drilling washing fluid is poor in wall protecting effect under the stratum conditions of strong breaking and continuous leakage. The drilling washing fluid is characterized in that 30-50kg of bentonite, 2-4kg of soda ash, 2-5kg of tackifier, 20-50kg of fluid loss agent, 5-15kg of flow pattern regulator, 30-80kg of bridging agent, 20-50kg of blocking agent, 10-30kg of inhibitor and 1-3L of foaming agent are added to each cubic meter of water. The anti-collapse and anti-leakage drilling washing fluid has the advantages that the drilling washing fluid is good in collapse preventing effect, fast in leakage blocking, high in leakage blocking strength, wide in adaptive crack width range, and widely applicable to the drilling of water-sensitive and loose and broken stratums, low-pressure leakage layers and fracture hole developed stratums.

The invention provides solidified water temporary plugging well-killing working fluid. The solidified water temporary plugging well-killing working fluid is prepared from 10 to 40 percent of solidified water system and 60 to 90 percent of anti-swelling stabilizing fluid, wherein the solidified water system is prepared from the following components in percentage by mass: 1.1 to 1.5 percent of main agent, 0.3 to 0.5 percent of solidification initiator and the balance of water. The preparation method of the working fluid comprises the following steps: 1), taking the main agent in an amount determined in a formula; 2) taking the solidification initiator and the anti-swelling agent in amounts determined in the formula; 3) injecting clear water into a container in an amount determined in the formula, adding the main agent and the solidification agent initiator in amounts determined in the formula in sequence, and uniformly stirring to obtain the solidified water system; 4) adding the anti-swelling stabilizing fluid in an amount determined in the formula to obtain the solidified water temporary plugging well-killing working fluid. A draining method combining acidifying-demulsifying and liquid nitrogen drainage is adopted. The working fluid is simple in preparation process, a colloid protective agent is not needed, the plugging efficiency is increased greatly, the plugging cost is lowered, damage to strata is reduced, and the problems of coexistence of collapse and leakage and low reservoir protection performance in a gas well construction process are solved. The solidified water temporary plugging well-killing working fluid has important practical significance to increase of the oil gas exploration and development speeds.

The invention provides an amphiphilic block T-shaped copolymer and a preparation method thereof, belonging to the field of petroleum exploitation technology. The amphiphilic block T-shaped copolymer comprises at least one block (A) taking acrylamide as a monomeric unit, at least one block (B)at least one block (A) taking alkylphenol polyoxyethylene ether as a monomeric unit, and at least one block (C) taking 2-acrylamide-2-methylpropanesulfonic acid as a monomeric unit. When being adopted as an oil displacement agent, the amphiphilic block T-shaped copolymer is less influenced by outside metal ions, and has excellent salt resistance, a T-shaped structure can form a reversible supermolecule aggregation network structure with intermolecule association, so that the temperature resistance and salt resistance properties of the polymer can be effectively enhanced.