48results about How to "High anti-expansion rate" patented technology

The present invention relates to a preparation method of a clay stabilizer for low permeability stratum. The preparation method sequentially comprises: adding epichlorohydrin to the aqueous solution of a monoaliphatic amine, carrying out a reaction for a certain time, adding epichlorohydrin, heating, carrying out a reaction, adding polyamine, adding epichlorohydrin, carrying out a reaction, and drying to obtain the clay stabilizer.

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 belongs to the technical field of oilfield development, and in particular relates to a cation-type anti-swelling clay stabilizer containing N-heterocyclic quaternary ammonium salt and a synthesis method thereof. The clay stabilizer is generated by performing reaction between anhydride naphthalene and dodecanol to generate dodecyl anhydride naphthalene half-ester, performing solution polymerization reaction with 2-(dimethylamino)chloromethane hydrochloride to generate an intermediate, and finally performing reaction with 2-bromomethylpyridine, wherein the molar ratio of the anhydride naphthalene to the dodecanol to the 2-(dimethylamino)chloromethane hydrochloride to the 2-bromomethylpyridine is 1:1-1.6:1.1-1.5:0.8-1.7, preferably 1:1.1:1.2:1.5. The clay stabilizer is characterized by wide source of raw materials, simple synthesis process, small usage and high reservoir adaptability. The clay stabilizer is good in temperature resistance and salt resistance, the temperature of 220 DEG C can be resisted, the degree of mineralization of 220000mg / L can be resisted, and the compatibility is excellent. The clay stabilizer can be strongly adhered to the surface of clay, is not prone to decomposition, and is long in duration and high in anti-swelling rate which exceeds 98 percent.

The invention discloses a sand-suppressing and anti-swelling agent and a preparation method thereof, which are used for acidizing oil-water wells. The sand suppressing and anti-swelling agent is formed by mixing amine salts and terpolymers produced by the reaction of organic amines and HCl in a molar ratio of 1:2, wherein the amine salts account for 98% of the total weight, and the terpolymers account for 98% of the total weight. 2% by weight. The ternary copolymer is a tripolymer of acrylamide monomer or 2-acrylamide-2-methylpropanesulfonic acid monomer, dimethyl diallyl ammonium chloride monomer and organosilane coupling agent. meta-copolymer. Tests show that the anti-swelling rate of the sand-suppressing and anti-swelling agent is higher than 85%, and the sand-suppressing rate is higher than 90%. It can not only effectively prevent clay expansion, but also effectively prevent and control fine silt sand production, and is suitable for acidizing operations in unconsolidated sandstone reservoirs with medium and low sand production intensity within 90 °C.

The invention belongs to the technical field of tertiary oil recovery, and particularly relates to an anti-swelling clay stabilizer and a preparation method thereof. The preparation method comprises the following steps: sequentially adding benzaldehyde-2, 4-sodium disulfonate, sodium cyanoborohydride, dimethylamine and methanol into a reactor, heating, refluxing, and evaporating to dryness; adding allyl chloride, sodium sulfite, copper chloride and ethanol into the reactor, stirring, heating, refluxing and filtering; adding ethyl acetate, heating for dissolving, filtering, cooling the filtrate to below 10 DEG C, and separating out crystals; adding 3-[(3-acrylamidopropyl) dimethyl ammonium] propionate, water, TX-10 and MS-1, uniformly stirring, continuously stirring, simultaneously dropwise adding 10% of an initiator solution, after dropwise adding, heating to 50-55 DEG C, keeping the temperature for 2-3 hours, adding sodium sulfite, stirring for 0.5-1 hour, adding potassium chloride and ammonium sulfate, and stirring for dissolving to obtain the clay stabilizer. The clay stabilizer has the advantages of high anti-swelling rate, high temperature resistance and washing resistance.

The invention discloses a star compound carrying intensive charge and a preparation method thereof. The star compound is prepared according to the following steps: dropwise adding a certain amount oftrimethylolpropane-tris(3-aziridinyl propionate) reaction liquid into a reaction flask filled with a methylamine (or ethylamine) aqueous solution and an acid catalyst, so as to perform a first step ofan aziridine ring-opening reaction; then adding a certain amount of 3-chlorine-2-hydroxypropyl-trimethyl ammonium chloride into the reaction liquid, so as to perform a second step of a quarter of amination reaction. An obtained product is the star compound carrying the intensive charge.

The invention relates to the field of petroleum exploitation, in particular to a clay stabilizer for reservoir reformation fracturing and a preparation method thereof. The method comprises the following steps of: (1) using p-aminophenol and epichlorohydrin as raw materials to obtain an intermediate product as shown in a formula I under the catalysis of sodium alcoholate; and (2) using the intermediate product as shown in the formula I and ammonia gas as raw materials to obtain the clay stabilizer for the reservoir reformation fracturing as shown in a formula II. The clay stabilizer for the reservoir reformation fracturing as shown in the formula II contains a benzene ring with relatively high polarity, so that the clay stabilizer further has very high polarity while having the advantages of a common polyether amine clay stabilizer, the clay stabilizer can be easily discharged after used as a fracturing fluid additive, and the clay stabilizer can protect the environment better, has an advantage in anti-expansion rate, and has more wide development prospects in oil and gas field exploitation. The formulas are shown in the description.

The invention relates to a compound oil deposit antiswelling and sand inhibiting agent and a preparation method thereof. The compound oil deposit antiswelling and sand inhibiting agent is prepared from the following raw materials in parts by weight: 20 to 30 parts of epoxy chloropropane-trimethylamine polymers, 20 to 30 parts of cationized polyacrylamide, 20 to 30 parts of poly-dimethyl diallyl ammonium chloride, 37.5 parts of ammonium chloride, 3.75 parts of dibutyl phthalate, 2.27 to 2.75 parts of hydroxyethyl ethylenediamine, 1.0 to 1.25 parts of triethylene tetramine, 5 to 10 parts of graphite powder, 1 to 4 parts of methyl methacrylate, 2 to 5 parts of biuret 2-butoxyethyl acetate, 2 to 5 parts of N-zinc pentamethylene dithiocarba-piperdine complex and 5 to 10 parts of titanate coupling agents. The compound oil deposit antiswelling and sand inhibiting agent is adsorbed on the surface of viscosity particles; a layer of protecting film is formed on the surface, so that the viscosity particles are effectively protected; clay particles are prevented from hydration swelling.

The invention belongs to the technical field of oilfield development, and specifically relates to a temperature-resistant and salt-resistant type anti-swelling clay stabilizer and a synthetic method thereof. The temperature-resistant and salt-resistant type anti-swelling clay stabilizer is prepared through the following steps of enabling phthalic anhydride to react with n-octyl alcohol, thus generating n-octyl phthalic anhydride hemi-ester; carrying out a solution polymerization reaction on the n-octyl phthalic anhydride hemi-ester and 2-(dimethylamino) chloromethane hydrochloride, thus generating an intermediate; finally enabling the intermediate to react with benzyl bromide, thus generating the temperature-resistant and salt-resistant type anti-swelling clay stabilizer, wherein a molar ratio of the phthalic anhydride, the n-octyl alcohol, the 2-(dimethylamino) chloromethane hydrochloride and the benzyl bromide is 1 to 1.1 to 1.3 to 1.6. The temperature-resistant and salt-resistant type anti-swelling clay stabilizer disclosed by the invention has the characteristics that the sources of raw materials are wide, a synthetic technology is simple, the dosage is less, and the oil reservoir adaptability is strong; the temperature-resistant and salt-resistant type anti-swelling clay stabilizer is good in temperature resistance and salt resistance, the temperature resistance can reach 250 DEG C, the mineralization resistance degree can reach 200,000 mg / L, and good compatibility is obtained; the temperature-resistant and salt-resistant type anti-swelling clay stabilizer can be forcefully adsorbed to the surface of clay and is not easy to decompose, long in validity period and high in anti-swelling rate, and the anti-swelling rate can reach 98 percent or more.

The invention relates to the technical field of oilfield development, in particular to a clay anti-swelling agent for high temperature oilfield acidification. The clay anti-swelling agent is preparedby: reacting 1-naphthol with acrylic acid to generate naphtyl acrylate, and then carrying out amidation reaction with aniline, wherein 1-naphthol, acrylic acid and aniline are in a mole ratio of 1:0.9-1.5:1.1-1.3, preferably 1:1.1:1.2. The clay anti-swelling agent has the characteristics of simple preparation process, low cost, strong adaptability, strong stability, high yield, high temperature resistance and good anti-swelling effect, has yield of over 90%, can tolerate a highest temperature up to 210DEG C, and has anti-swelling rate up to 90% or more. Therefore, the clay anti-swelling agentprovided by the invention can be widely applied in clay anti-swelling process of oilfield acidification.

The invention belongs to the technical field of oil field development, and specifically relates to a temperature-resistant and salt-resistant anti-swelling clay stabilizer and a preparation method thereof. The anti-swelling clay stabilizer is composed of soybean oil modified surfactant, amino carboxylic acid resin, Ammonium sulfate and water are compounded; wherein, the soybean oil modified surfactant is a quaternary ammonium salt surfactant with a long carbon chain alkyl group and a quaternary ammonium cation. The anti-swelling clay stabilizer of the present invention has the characteristics of wide source of raw materials, simple synthesis process, less dosage, and strong adaptability to oil reservoirs; meanwhile, it has good heat and salt resistance, can withstand temperatures up to 280°C, and can resist salinity up to 230,000mg / L, and has good compatibility with formation water, high anti-swelling rate, and the anti-swelling rate reaches more than 98.0%. Therefore, the present invention can be widely applied to the technical field of oil field exploitation.

The invention belongs to the technical field of oil field development, and in particular relates to an anti-swelling clay stabilizer for water injection in low-permeability oil reservoirs and a preparation method thereof. The anti-swelling clay stabilizer is composed of soybean oil modified surfactant, tartaric acid, potassium hydroxide and water It is compounded; wherein, the soybean oil modified surfactant is a quaternary ammonium salt surfactant with a long carbon chain alkyl group and a quaternary ammonium cation. The anti-swelling clay stabilizer of the present invention has the characteristics of wide source of raw materials, simple synthesis process, less dosage, and strong adaptability to oil reservoirs; meanwhile, it has good temperature and salt resistance, can withstand temperatures up to 290°C, and resists salinity up to 220,000mg / L, and has good compatibility with formation water, high anti-swelling rate, and the anti-swelling rate reaches more than 98.0%. Therefore, the present invention can be widely applied to the technical field of oil field exploitation.

The invention provides an esterification method of a fibrous material. The method comprises the following steps of contacting the fibrous material with a fluid containing acetic oxide to obtain contacted material, wherein the contacting condition is as follows: the pressure is 0.1-2.0MPa and the temperature is 60-140 DEG C, and the volume ratio of the fluid containing acetic oxide to the fibrous material is (1-10) to 1. The invention provides an esterification material obtained by esterification of the fibrous material through the esterification method. The esterification method of the fibrous material provided by the invention has the advantages that the fibrous material and the fluid containing acetic oxide are contacted, the dosage of the fluid in a contacting process is reasonably controlled, and the fluid is heated and pressed, so that the fibrous material and the acetic oxide are subjected to esterification reaction. According to the method provided by the invention, the esterification of the fibrous material is well performed without the action of any catalyst, the obtained esterification material has high esterification rate, the added value of the esterification material is obtained, and the fibrous material is used for manufacturing doors and windows, outdoor deck floors, escalators, fences and the like.

The invention discloses a cationic surfactant carrying a dense charge and its preparation method and application. The surfactant is prepared through the following steps: adding quantitative The trimethylolpropane-three (3-aziridinyl propionate) reaction solution carries out the first step aziridine ring-opening reaction; then in the reaction solution, add quantitative 3-chloro-2-hydroxypropyl- Trimethylammonium chloride is subjected to the second step of quaternization reaction, and the resulting product is a cationic surfactant carrying a dense charge.

The invention discloses a star-shaped polycation-based compound and its preparation method and application. The surfactant is prepared through the following steps: adding a certain amount of trihydroxyl Methylpropane-three (3-aziridinyl propionate) reaction liquid carries out the first step aziridine ring-opening reaction; Add quantitative methyl chloride (or benzyl chloride) reaction liquid to the reaction liquid again and carry out the second Step quaternization reaction, the resulting product is a star-shaped polycation-based compound.

The invention belongs to the technical field of oil field development, and particularly relates to a long-acting oil well anti-swelling clay stabilizing agent and a synthetic method thereof. 2,3-naphthalic anhydride and n-dodecyl alcohol react to generate dodecyl ortho naphthalene dimethylbenzene anhydride half ester, the dodecyl ortho naphthalene dimethylbenzene anhydride half ester and 2-(dimethylamino) chloromethane hydrochloride generate an intermediate through solution polymerization reaction, the intermediate and 1-bromomethyl-naphthalene react to generate the clay stabilizing agent, themolar ratio of the 2,3-naphthalic anhydride, the n-dodecyl alcohol, the 2-(dimethylamino) chloromethane hydrochloride to the 1-bromomethyl-naphthalene is 1:(0.8-1.4):(1.2-1.6):(1.1-1.8), and preferably, the molar ratio is 1:1:1.4:1.2. The clay stabilizing agent has the advantages of wide raw material source, simple synthetic process, less consumption and high oil deposit adaptability. The clay stabilizing agent is good in temperature and salt resistance, can resist the temperature of 250 DEG C and resist the mineralization degree of 220000mg / L and has good compatibility. The clay stabilizingagent can be powerfully adsorbed onto the surface of clay, is not easily decomposed and is long in validity period and high in anti-swelling rate, and the anti-swelling rate reaches 98% or more.