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

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.