51results about How to "Reduce oil/water interfacial tension" patented technology

The invention relates to an anion / cation composite surfactant oil displacement agent, which is prepared by compounding an anionic surfactant, a cationic surfactant, a nonionic surfactant, small molecular alcohol cosurfactant and deionized water according to a mass ratio of (4-10):(0.5-1):(2-5):(2-5):(1-2). The oil displacement agent provided by the invention not only has low surface tension and low oil-water interfacial tension, but also has good emulsifying stability on crude oil. A 0.15% oil displacement agent water solution is prepared, a Sweden Biolin Sigma701 type surface tension meter is employed for test at a temperature of 25DEG C, and the low surface tension evaluation standard is a surface tension of lower than or equal to 38mN / m.

The invention discloses a rosinyl sulphonate gemini surfactant, the general structure thereof is shown in the right formula, R represents rosinyl tricyclic diterpene group and is an integer less than or equal to 1 and greater than or equal to 5. The preparation method is as follows: nucleophilic reaction is carried out on dehydro-abietylamine or disproportionated rosin and dibromoalkane to obtain an active intermediate N, N'-didehydro-abietylamine base alpha, omega-diamine which is then used to react with 2-bromoethyl sodium sulfonate to obtain the rosinyl sulphonate gemini surfactant. The surfactant prepared by the invention has better water solubility, very high surface activity and ability of reducing oil / water interfacial tension, excellent solubilization, salt-resistance, anti-deposition and wetting properties for oil, cheap and accessible raw materials and low toxicity, and is biodegradable.

The invention provides a lipopetide biosurfactant oil extraction agent for improving extraction rate of crude oil and relates to the technical field of microbial oil extraction. The lipopetide biosurfactant oil extraction agent is prepared by obtaining fermentation liquor after fermentation by lipopetide-biosurfactant-producing bacillus subtilis ACCC01430 and mixing the fermentation liquor and a nutrient solution according to a volume ratio of (3-5):1, wherein the nutrient solution comprises 1 percent of molasses, 1 percent of urea, 0.5 percent of peptone, 0.2 percent of yeast extract, 0.3 percent of ammonium monohydric phosphate and the balance of water; and the fermentation liquor is prepared by fermenting with bacillus subtilis ACCC01430 by a method specified in the description. According to the lipopetide biosurfactant oil extraction agent for improving extraction rate of crude oil, a large amount of lipopetide surfactant is produced by ground fermentation; the surfactant can emulsify crude oil, improve wettability of rocks, reduce oil-water interface tension and reduce viscosity of the crude oil; and the bacteria can reproduce and grow in oil layer at 50 DEG C. The nutrient solution can promote the growth of the bacteria and activate microbes to extract oil.

The invention discloses a method for preparing an allyl surface-active macromonomer, which is characterized by comprising the following steps: adding 20 portions of alkylphenol polyoxyethylene ether (CmH2m+1-C6H4-O-(CH2CH2O)nH, n is equal to 1 to 60, and m is equal to 1 to 20), 10 to 900 portions of solvent and 0.1 to 15 portions of catalyst into a three-mouth reaction flask with a reflux condensation device, and reacting the mixture for 1 hour under stirring at the room temperature; increasing temperature to 30 to 95 DEG C, adding 0.5 to 20 portions of allyl chloride into the reaction product, and continuously reacting for 6 to 48 hours; distilling the reaction product under reduced pressure to remove the solvent so as to obtain a crude product; and performing silica gel column chromatographic separation to obtain allyl alkylphenol polyoxyethylene ether with the yield of 70 to 95 percent. The allyl alkylphenol polyoxyethylene ether has excellent surface activity, and can be directly used as a surfactant. A water-soluble copolymer synthesized by taking the allyl alkylphenol polyoxyethylene ether as a surface-active macromonomer has the function of tackifying, or reducing solution surface tension and water-oil interfacial tension, and can be taken as a tackifying copolymer or a macromolecular surfactant for improving the oil recovery ratio.

The invention provides a functional polymer with surface activity as well as a preparation method and application thereof. The functional polymer with surface activity contains a structural unit A, a structural unit B and a structural unit C, wherein the structural unit A has a structure as shown in a formula (1) in the specification; the structural unit B has a structure as shown in a formula (2) in the specification; the structural unit C has a structure as shown in a formula (3) in the specification; based on the weight of the polymer, the content of the structural unit A is 50-88wt%; the content of the structural unit B is 10-40wt%; the content of the structural unit C is 2-10wt%; the viscosity-average molecular weight of the polymer is 6-12 million. The functional polymer with surface activity has good temperature and salt resistance and a capability of thickening water media. The polymer oil displacement agent is applicable to oil reservoirs with low to medium permeability and high-temperature and high-salinity oil reservoirs and can conduce to further enhancing the oil recovery in tertiary oil recovery.

The invention discloses a polymeric surfactant heavy oil viscosity reducer and a preparation method, and mainly solves the problem of poor viscosity reduction effect of existing heavy oil viscosity reducers. The preparation method includes: firstly reacting maleic anhydride with nonylphenol polyoxyethylene ether to obtain an intermediate product, and then reacting the intermediate product with a certain amount of acrylamide to prepare the polymeric surfactant. The surfactant has the advantages of reliable preparation process, low cost and low use concentration, and has the ability of significantly reducing the heavy oil viscosity.

The invention discloses a method for preparing a 4-vinyl benzyl surface-active macromonomer, which is characterized by comprising the following steps: adding 20 portions of alkylphenol polyoxyethylene ether (CmH2m+1-C6H4-O-(CH2CH2O)nH, n is equal to 1 to 60, and m is equal to 1 to 20), 10 to 900 portions of solvent and 0.1 to 15 portions of catalyst into a three-mouth reaction flask with a reflux condensation device, and reacting for 1 hour under stirring at the room temperature; increasing temperature to 30 to 90 DEG C, adding 0.5 to 25 portions of 4-vinyl benzyl chloride into the reaction product, and continuously reacting for 6 to 48 hours; distilling the reaction product under reduced pressure to remove the solvent so as to obtain a crude product; and performing silica gel column chromatographic separation to obtain 4-vinyl benzyl alkylphenol polyoxyethylene ether with the yield of 62 to 94 percent. The 4-vinyl benzyl alkylphenol polyoxyethylene ether has excellent surface activity, and can be directly used as a surfactant. A water-soluble copolymer synthesized by taking the 4-vinyl benzyl alkylphenol polyoxyethylene ether as a surface-active macromonomer has the function of tackifying, or reducing solution surface tension and water-oil interfacial tension, and can be taken as a tackifying copolymer or a macromolecular surfactant for improving the oil recovery ratio.

The invention provides an oil displacing microemulsified acid system for acidizing plugging removal and a preparation method of the system. The oil displacing microemulsified acid system is prepared from the following components in percentage by weight: 10-35% of diesel fuel, 40-75% of acid fluid, 10-30% of alkylsulfobetaine, 1-15% of fatty amine polyoxyethylene ether phosphate, and the balance of 10% hydrochloric acid. The preparation method of the system comprises the following steps: weighing the raw materials by weight; firstly, putting acid fluid into a vessel, heating and stirring in water bath at 60 DEG C, adding alkylsulfobetaine and fatty amine polyoxyethylene ether phosphate for dissolving thoroughly, and then adding 10% ydrochloric acid; and next, adding the diesel oil and stirring for 0.5 hour, thereby obtaining the finished product. The oil displacing microemulsified acid system is a thermodynamic stable system, has excellent dissolving property to inorganic matters and organic matters, and excellent oil displacing property, and can be widely applied to the measures of a water injection well and an oil well conversion well.

The invention relates to a fatty amine polyoxyethylene ether diethyl disulfonate surfactant and a preparation method thereof. The surfactant has the structure shown in the formula (I) (which is as shown in the description), wherein M refers to alkali metal ions, R refers to C12-C18 alkyl radical, m and n refer to adduct numbers of ethoxy groups, and the sum of m and n ranges from 2 to 10. According to the surfactant, oil-water interfacial tension can be reduced to be ultra-low under the conditions of high temperature, high salinity and high content of divalent metal ions, and with the excellent performance, the surfactant can be used for displacement of oil of a harsh reservoir under high temperature, high salinity and high hardness. The synthetic method is simple, short in technical process and mild in reaction conditions, and is suitable for scale production.

The invention discloses an oxygen reduction air layered injection pipe column, system and method. The oxygen reduction air layered injection system comprises the oxygen layered reduction air injectionpipe column arranged in an oil reservoir at least comprising an upper oil layer and a lower oil layer and monitoring equipment. The oxygen layered reduction air injection pipe column comprises an upper oil pipe arranged in an upper sleeve, an upper packer, an air injection nipple, a lower oil pipe, a guiding-in pipe, an inserting sealing piece and a lower packer, wherein the upper packer and theair injection nipple are sequentially connected to the lower portion of the upper oil pipe from top to bottom, the lower oil pipe is arranged on the lower portion of the air injection nipple, and a ball seat is arranged at the lower end of the lower oil pipe. The guiding-in pipe is arranged in the upper oil pipe, the upper packer, the air injection nipple and the part of the lower oil pipe in a penetrating mode, the inserting sealing piece is arranged between the guiding-in pipe and the upper portion of the lower oil pipe, and the lower packer is arranged between the lower sleeve and the loweroil pipe. The lower packer is located between the upper oil layer and the lower oil layer, and the monitoring equipment comprises a concentration detecting piece for monitoring the oxygen concentration of a production well. According to the oxygen reduction air layered injection pipe column, system and method, the good air layered injection exploitation effect can be achieved.

The invention discloses a modifier for preventing bittern scaling. The modifier comprises the following ingredients (by weight): 10-20 parts of 2-phosphonobutane-1,2,4-tetrasodium trihydroxy, 5-10 parts of sodium polyacrylate, 2-3 parts of coco fatty acid diethanol amide, 0.2-0.5 part of polyether modified silicone and the rest of water. The modifier has a good effect of preventing scaling and has strong flowback performance. By the use of the modifier, construction is simple, and workload is not increased, and cost is saved.

The microbial emulsion breaker is composed of (wt%) 10-25% of microbe, 25-50% of chemical demulsifier, 0.1-5% of inorganic salt and 25-50% of water. The utilization of said invented product can greatly reduce oil and water interfacial tension, and has the advantages of quick dewatering speed, lower dewatering temp. and low oil content in discharged sewage.

The invention provides an oil base drilling cutting cleaning fluid and a cleaning method for oil base drilling cuttings. The oil base drilling cutting cleaning fluid includes: a component A, a component B and a component C; the component A is a demulsifier; the component B is a surfactant; the component C is water; and the demulsifier, the surfactant and water are in a mass ratio of (1.6-2):(0.6-0.8):(100-150). Compared with the prior art, the demulsifier is added into the oil base drilling cutting cleaning fluid provided by the invention to destroy the stability of oil base drilling fluid emulsion carried in oil base drilling cuttings, so that a liquid phase can break away from the surfaces of solid phase particles, and the demulsifier can reach a synergistic effect with the surfactant, thus lowering the oil-water interfacial tension, and better playing the role of cleaning the oil component. In addition, the oil base drilling cutting cleaning fluid is composed of the demulsifier, the surfactant and water, the cost is low, and the operation is simple.

The invention discloses a composite surfactant oil displacement system suitable for a high calcium and magnesium oil reservoir, and a preparation method of the composite surfactant oil displacement system. By the total weight of the composite surfactant oil displacement system, the composite surfactant oil displacement system is prepared from the following components in percentage by weight: 0.0125-0.8% of alkanolamide, 0.01-0.75% of sodium fatty alcohol polyoxyethylene ether sulfate, and 99.00-99.95% of simulated formation water or oilfield formation water. The composite surfactant oil displacement system and raw oil can form ultra-low oil / water interface tension less than or equal to 10<-3> mN / m, and the composite surfactant oil displacement system has excellent oil displacement performance and good stability, and has broad application prospects in the process of three-time mining of the high calcium and magnesium oil reservoir.

The invention relates to preparation and applications of a surfactant for alcohol amide-sulfate composite type alkali-free oil displacement, and belongs to the field of colloid and interface chemistry. According to the present invention, fatty acid monoethanol amide is subjected to an ethoxylation reaction and a sulfation reaction to prepare an alcohol amide-sulfate composite type surfactant fatty acid monoethanol amide ethoxylate sodium sulphate; the surfactant has good chemical stability and excellent salt tolerance in a range from a neutral pH value to an alkaline pH value, wherein the hydrophilic-lipophilic balance can be regulated by controlling a chain length of alkyl in the raw material fatty acid and the number of ethylene oxide added to every molecule through an addition reaction; the surfactant has high saturation absorption capacity in a water / air interface and an oil / water interface so as to efficiently reduce crude oil / water interface tension; the surfactant can be matched with other surfactants, such that Daqing crude oil / formation water interface tension can be reduced to a 10<-3> mN / m magnitude under the following conditions, wherein the conditions comprise that the total mass fraction of the surfactant is 0.05-0.5%, any alkalis, alkaline salts, neutral electrolytes and cosurfactants are not added, and an oil pool temperature is 45 DEG C; and the surfactant can be adopted as an alkali-free oil displacement agent.

The invention discloses a modifying agent for preventing calcium halide scaling. The modifying agent is prepared from, by mass, 15-25 parts of amino trimethylene phosphonic acid, 4-8 parts of docusate sodium, 2-3 parts of cetyltrimethylammonium chloride, 0.1-0.3 part of tributyl phosphate and the balance water. The modifying agent has the advantages of being high in scaling resistance, small in use amount, easy to construct, not capable of increasing operation workloads, high in flow-back capacity, capable of saving cost, and the like.

A method for preparing an oil extractor is provided. The method includes dissolving 0.1˜30% by weight of a potassium sulfate, 0.1˜30% by weight of a potassium persulfate, and 0.1˜30% by weight of a manganese sulfate in a solvent to form a solution; heating the solution to synthesize a compound by a microwave; cooling a temperature of the compound to a room temperature; and removing the solvent from the compound. An extractor prepared from the method is also provided.

The invention discloses a self-emulsifying blockage removing liquid and a preparation method thereof. The invention provides the self-emulsifying blockage removing liquid. The self-emulsifying blockage removing liquid comprises the following components in percentage by weight: 0.2-3wt% of a nonionic emulsifier, 0.5-5wt% of a cationic surfactant, 1-5wt% of a water-soluble oxidant, 1-15wt% of an organic acid corrosion inhibitor, 0.5-2wt% of a corrosion inhibitor and the balance of water. The invention also provides the preparation method of the self-emulsifying blockage removing liquid. The method comprises the following steps: mixing and stirring the nonionic emulsifier and part of the water to obtain a mixed solution A; mixing and stirring the cationic surfactant, the water-soluble oxidant, the organic acid corrosion inhibitor, the corrosion inhibitor and the residual water to obtain a mixed solution B; and mixing and stirring the mixed solution A and the mixed solution B to obtain theself-emulsifying blockage removing liquid. The self-emulsifying blockage removal liquid provided by the invention has excellent oil washing capability and blockage removal performance, and is remarkable in blockage removal effect, relatively low in corrosion to a pipeline and relatively high in safety.

The invention provides a waterproof locking agent which is suitable for the technical fields of oil field oil gas drilling and oil-gas field development. According to the scheme, surface tension and oil-water interfacial tension in rock capillary pores are effectively reduced, and the surfaces of the rock capillary pores are converted into neutral lubrication, so that the water locking effect is relieved, and the oil and gas recovery efficiency is improved. The waterproof locking agent comprises the following components: 3%-10% of a nonionic surfactant, 10%-15% of an anionic surfactant, 5%-10% of a zwitterionic surfactant, 5%-10% of low-carbon alcohol and the balance of water. The waterproof locking agent is simple in preparation method, can reduce surface tension and oil-water interfacial tension, converts rock capillary pore surfaces into neutral wetting, and has good waterproof locking effect performance.

The invention discloses an oil-displacing agent prepared from fracturing fluid flow-back liquid. The oil-displacing agent comprises, by weight, 90-95 parts of the fracturing fluid flow-back liquid, 1-2 parts of bacillus subtilis lipopeptide sodium, 3-5 parts of lauroyl hydrolyzing silk sodium, 0.5-1 part of polyisobutylene succinimide, 0.5-1 part of synergists and 0.5-1 part of chelating agents. The invention further discloses a preparation method of the oil-displacing agent made from the fracturing fluid flow-back liquid. The oil-displacing agent has the advantages that the fracturing fluid flow-back liquid serves as base liquid, and functional components are added for mutual matching to obtain the oil-displacing agent with good performance; the oil-displacing agent can be applied to exploitation of high water content, hyposmosis, thickened-oil, high temperature and high salt type oil reservoirs, and oil displacement efficiency, conformance factor and recovery ratio can be increased;the fracturing fluid flow-back liquid serving as base liquid can be applied to preparation of the oil-displacing agent after slight treatment, so that the raw material cost of the oil-displacing agentis reduced, and environmental pollution is avoided.

The invention provides an efficient degreaser and preparation and application methods thereof. The efficient degreaser is composed of materials including, by weight percentage, 20.0-25.0% of surfactant, 10.0-15.0% of solvent, 3.0-5.0% of alkali, 2.0-5.0% of alkali and water as balance. According to the efficient degreaser, the surfactant can significantly reduce oil-water interfacial tension and achieves certain emulsifying effects; the solvent can further eliminate organic matters in raw grease to weaken the bonding force between the organic molecules and a tank wall through penetration and further facilitate removal of the raw grease from the tank wall; alkali liquor can neutralize acid content in asphaltene to achieve the aim of efficient cleaning. Besides, the efficient degreaser is free from harm to environment and workers, significant in degreasing effects and consistent to the development trend of degreasers.

The invention discloses a surfactant with low surface and interface tension and a high contact angle and a preparation method thereof, and belongs to the technical field of surfactants. The surfactantwith the low surface and interface tension and the high contact angle is prepared from the following components in parts by weight: 15-25 parts of a fluorocarbon surfactant, 40-60 parts of alkylphenol polyoxyethylene, 40-60 parts of polyquaternary ammonium salt high polymer and 40-60 parts of a cosurfactant. By means of the water unblocking agent (surfactant with the low surface and interface tension and the high contact angle) provided by the invention, surface tension and interface tension of a solution can be effectively reduced, a contact angle is increased, moreover, the temperature resistance performance is good, the stability is good, and water blocking damage of a low-porosity low-permeability reservoir can be effectively reduced.

The invention relates to a waterproof locking agent and a preparation method thereof and belongs to the technical field of a drilling fluid additive. The method comprises the following steps: putting acrylamide, distilled water, glycerin monostearate and cetyl triethyl ammonium bromide into a stirrer for stirring, collecting and mixing a mixture, thereby acquiring an emulsion; putting the emulsion, cyclohexane, liquid polybutadiene, ammonium metavanadate and neodymium oxide into a reactor, using nitrogen for protecting, preheating, adding ammonium persulfate and stirring; after ending stirring, raising temperature, stirring and reacting, cooling and then adding gamma-aminopropyl triethoxy silane, uniformly stirring, standing, cooling to room temperature and collecting a reaction mixture; performing reduced pressure distillation on the reaction mixture, removing distilled water and cyclohexane, collecting distilled residue, filtering, collecting filtrate, and uniformly stirring the filtrate and beta-sitosterol, thereby acquiring the waterproof locking agent. The waterproof locking agent prepared according to the invention can effectively reduce the tension on the filtrate surface and the tension on the oil-water interface and can increase the permeability of oil and gas phases.

The invention provides a method for synthesizing diamine terminated polystyrene based on an ATRP active polymerization method and an application of the diamine terminated polystyrene. The method comprises the steps as follows: reacting potassium phthalimide and dibromomethane in anhydrous DMF, and carrying out purification to obtain an initiator N-bromomethyl phthalimide; then, carrying out atom transfer radical polymerization on the initiator and a styrene monomer under the action of a catalyst, and carrying out a reaction at 110 DEG C for 0.5-3 h to generate modified polystyrene with different molecular weights; next, reacting the modified polystyrene and potassium phthalimide in the anhydrous DMF to obtain polystyrene protected by a bisphthalimide group; and finally, reducing the polystyrene protected by a bisphthalimide group by hydrazine hydrate to obtain diamine terminated polystyrene. Then, the synthesized diamine terminated polystyrene is compounded with functional nanoparticles, so that the oil / water interfacial tension can be greatly reduced by 85% or above, and the synthesized diamine terminated polystyrene can be applied to the field of emulsion demulsification and thelike.

The invention relates to a mixed-ether-based floatation agent and a preparation method thereof and belongs to the technical field of coal floatation agents. The mixed-ether-based floatation agent includes, by mass, 50-60 parts of a mixed ether, 40-50 parts of a foaming agent, and 0.1-0.2 part of a surfactant. The mixed-ether-based floatation agent can enhance hydrophobicity of weathered coal, so that weathered coal washing recovery rate is increased, washing quality is controlled, and production cost is reduced.

The invention relates to an antioxidant beautifying mask and a preparation method thereof, and belongs to the technical field of cosmetics. The preparation method comprises the following steps: gelatinizing 10-30 weight parts of castanopsis sclerophylla powder to obtain a gelatinized castanopsis sclerophylla powder solution; dissolving 5-30 weight parts of chitosan in an acidic solution to obtaina chitosan solution; mixing the gelatinized castanopsis sclerophylla powder solution and the chitosan solution to obtain a stock solution; mixing the stock solution, 5-8 weight parts of an emulsifyingagent, 5-15 weight parts of a wetting agent, 0.1-3 weight parts of a preservative, 0.1-5 weight parts of a pH value regulator and 0.1-0.4 weight part of an essence, moulding, drying and uncovering afilm. The preparation method is simple and easy to operate, and a finished product is good in quality; the mask prepared with the preparation method uses environment-friendly, mild and non-irritant raw materials, has relatively good antioxidant and bacteriostatic effects, and is conductive to discharge of facial cosmetic residues.

The invention discloses a heavy oil emulsifier and a preparation method thereof. The heavy oil emulsifier is prepared from the raw materials in parts by weight: 10 to 12 parts of span-80, 10 to 12 parts of tween-60, 6 to 9 parts of alkylphenol ethoxylates, 6 to 9 parts of alkyl benzene sulfonic acid, 4 to 6 parts of dicarboxyl sulfuric acid betaine type zwitter-ion dimeric surfactant, 0.5 to 1.5 parts of urea, 4 to 8 parts of glycerol, 5 to 8 parts of stearic acid, and 20 to 30 parts of deionized water. According to the heavy oil emulsifier provided by the invention, the oil / water interface tension can be remarkably reduced, so that water drops are stably dispersed into heavy oil for a long term so as to form a stable microemulsion system; the heavy oil viscosity is greatly diluted, so that the fluidity is improved, and the heavy oil emulsifier can be widely applied to the fields such as thickened oil recovery and transportation, industrial burnup, heavy oil fluid catalytic cracking and casting techniques, and has a broad market prospect.