20 research outputs found

    Compatibility of The Dimensions of Polymer Molecular Aggregates to The Pore Throat of a Reservoir

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    The compatibility of the dimensions of the polymer molecular aggregates and the pore throat of the reservoir were studied. The W section of Tuha oilfield was the study area and polymers produced by Daqing Refining and Chemical Company were used. The permeability limit of the polymer molecules with different molecular masses and concentrations, matching relationship between the dimension of polymer molecular aggregates and pore throat were obtained by experiments. The results of the research are important for the development and implementation of a polymer flooding technical scheme in the middle and late stages of the operation of the Tuha oilfield

    Study on Interfacial Tension of Surfactant and Its Oil Displacement Performance

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    Tuha oil field is located at the Turpan basin in China. Currently, the water content of the main reservoir of the section Y-6 of the Tuha oil field is more than 93% and the recovery rate is less than 20%. At present, an efficient oil displacing agent must be selected for this oil field, which can be used in reservoirs with a high degree of mineralization. Based on the results of experiments measuring the interfacial tension of the surfactant solution and oil, a non-ionic surfactant was selected. Non-ionic surfactant can reduce interfacial tension to the ultra-low level (10{-3} mN/m), and when the amount of adsorption by oil sand is 3, interfacial tension also can maintain at the level of 10{-2} mN/m, so the solution of non-ionic surfactant has good anti-adsorption ability. The results of the oil displacement experiments show that the solution of a non-ionic surfactant can increase the efficiency of oil displacement. But under condition of high water cut, the dominant flow channel in the core is formed, and the surfactant solution flows into the main channel preferentially and reduces the residual oil saturation in the main channel, which leads to a decrease in the resistance coefficient and injection pressure. Therefore, after water flooding, take measures to control the fluid profiles firstly so that the following surfactant solutions change direction in areas not exposed to water in order to achieve the best effect of the increase in oil recovery

    Study on interfacial tension of surfactant and its oil displacement performance

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    Tuha oil field is located at the Turpan basin in China. Currently, the water content of the main reservoir of the section Y-6 of the Tuha oil field is more than 93% and the recovery rate is less than 20%. At present, an efficient oil displacing agent must be selected for this oil field, which can be used in reservoirs with a high degree of mineralization. Based on the results of experiments measuring the interfacial tension of the surfactant solution and oil, a non-ionic surfactant was selected. Non-ionic surfactant can reduce interfacial tension to the ultra-low level (10-3 mN/m), and when the amount of adsorption by oil sand is 3, interfacial tension also can maintain at the level of 10-2 mN/m, so the solution of non-ionic surfactant has good antiadsorption ability. The results of the oil displacement experiments show that the solution of a non-ionic surfactant can increase the efficiency of oil displacement. But under condition of high water cut, the dominant flow channel in the core is formed, and the surfactant solution flows into the main channel preferentially and reduces the residual oil saturation in the main channel, which leads to a decrease in the resistance coefficient and injection pressure. Therefore, after water flooding, take measures to control the fluid profiles firstly so that the following surfactant solutions change direction in areas not exposed to water in order to achieve the best effect of the increase in oil recovery

    Study on interfacial tension of surfactant and its oil displacement performance

    Get PDF
    Tuha oil field is located at the Turpan basin in China. Currently, the water content of the main reservoir of the section Y-6 of the Tuha oil field is more than 93% and the recovery rate is less than 20%. At present, an efficient oil displacing agent must be selected for this oil field, which can be used in reservoirs with a high degree of mineralization. Based on the results of experiments measuring the interfacial tension of the surfactant solution and oil, a non-ionic surfactant was selected. Non-ionic surfactant can reduce interfacial tension to the ultra-low level (10-3 mN/m), and when the amount of adsorption by oil sand is 3, interfacial tension also can maintain at the level of 10-2 mN/m, so the solution of non-ionic surfactant has good antiadsorption ability. The results of the oil displacement experiments show that the solution of a non-ionic surfactant can increase the efficiency of oil displacement. But under condition of high water cut, the dominant flow channel in the core is formed, and the surfactant solution flows into the main channel preferentially and reduces the residual oil saturation in the main channel, which leads to a decrease in the resistance coefficient and injection pressure. Therefore, after water flooding, take measures to control the fluid profiles firstly so that the following surfactant solutions change direction in areas not exposed to water in order to achieve the best effect of the increase in oil recovery

    Compatibility of the dimensions of polymer molecular aggregates to the pore throat of a reservoir

    Get PDF
    The compatibility of the dimensions of the polymer molecular aggregates and the pore throat of the reservoir were studied. The W section of Tuha oilfield was the study area and polymers produced by Daqing Refining and Chemical Company were used. The permeability limit of the polymer molecules with different molecular masses and concentrations, matching relationship between the dimension of polymer molecular aggregates and pore throat were obtained by experiments. The results of the research are important for the development and implementation of a polymer flooding technical scheme in the middle and late stages of the operation of the Tuha oilfield

    Influence of sulphide Cu (I) promoting additives concentration on acid and catalytic properties of high-silica zeolites in straight-run gasoline conversion

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    In present article the influence of Cu[2]S promoting additives concentration on acid and catalytic properties of high silica MFI-type zeolites is investigated in the process of conversion of straight-run gasoline fractions of gas condensate into high octane components of motor fuels. It was shown that zeolite modified with 1% of Cu[2]S nanoscaled powder possesses the highest acid centers concentration and highest catalytic activity

    Conversion of the Propane–Butane Fraction into Arenes on MFI Zeolites Modified by Zinc Oxide and Activated by Low-Temperature Plasma

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    The effect of modification of MFI zeolite 1–5 wt.% ZnO activated by plasma on acid and catalytic properties in the conversion of the propane–butane fraction into arenes was investigated. The high-silica zeolites with silicate module 45 were synthesized from alkaline alumina–silica gels in the presence of an β€˜X-oil’ organic structure-forming additive. The modification of the zeolite with zinc was carried out by impregnating the zeolite granules in the H-form with an aqueous solution of Zn(NO3)2. The obtained zeolites were characterized by X-ray phase analysis and IR spectroscopy. It is shown that the synthesized zeolites belong to the high-silica MFI zeolites. The study of microporous zeolite-containing catalysts during the conversion of C3-C4 alkanes to aromatic hydrocarbons made it possible to establish that the highest yield of aromatic hydrocarbons is observed on zeolite catalysts modified with 1 and 3% ZnO and amount to 63.7 and 64.4% at 600 Β°C, respectively, which is 7.7–8.4% more than on the original zeolite. The preliminary activation of microporous zeolites modified with 1–5% ZnO and plasma leads to an increase in the yield of aromatic hydrocarbons from the propane–butane fraction; the maximum yield of arenes is observed in zeolite catalysts modified with 1 and 3% ZnO and activated by plasma, amounting to 64.9 and 65.5% at 600 Β°C, respectively, which is 8.9–9.5% more than on the initial zeolite. The activity of the zeolite catalysts modified by ZnO and activated by plasma show good agreement with their acid properties. Activation of the zeolites modified by 1 and 3% ZnO and plasma leads to an increase in the concentration of the weak acid sites of the catalyst to 707 and 764 mmol/g in comparison with plasma-inactivated 1 and 3% ZnO/ZKE-XM catalysts at 626 and 572 mmol/g, respectively

    Conversion of the Propane–Butane Fraction into Arenes on MFI Zeolites Modified by Zinc Oxide and Activated by Low-Temperature Plasma

    Get PDF
    The effect of modification of MFI zeolite 1–5 wt.% ZnO activated by plasma on acid and catalytic properties in the conversion of the propane–butane fraction into arenes was investigated. The high-silica zeolites with silicate module 45 were synthesized from alkaline alumina–silica gels in the presence of an β€˜X-oil’ organic structure-forming additive. The modification of the zeolite with zinc was carried out by impregnating the zeolite granules in the H-form with an aqueous solution of Zn(NO3)2. The obtained zeolites were characterized by X-ray phase analysis and IR spectroscopy. It is shown that the synthesized zeolites belong to the high-silica MFI zeolites. The study of microporous zeolite-containing catalysts during the conversion of C3-C4 alkanes to aromatic hydrocarbons made it possible to establish that the highest yield of aromatic hydrocarbons is observed on zeolite catalysts modified with 1 and 3% ZnO and amount to 63.7 and 64.4% at 600 Β°C, respectively, which is 7.7–8.4% more than on the original zeolite. The preliminary activation of microporous zeolites modified with 1–5% ZnO and plasma leads to an increase in the yield of aromatic hydrocarbons from the propane–butane fraction; the maximum yield of arenes is observed in zeolite catalysts modified with 1 and 3% ZnO and activated by plasma, amounting to 64.9 and 65.5% at 600 Β°C, respectively, which is 8.9–9.5% more than on the initial zeolite. The activity of the zeolite catalysts modified by ZnO and activated by plasma show good agreement with their acid properties. Activation of the zeolites modified by 1 and 3% ZnO and plasma leads to an increase in the concentration of the weak acid sites of the catalyst to 707 and 764 mmol/g in comparison with plasma-inactivated 1 and 3% ZnO/ZKE-XM catalysts at 626 and 572 mmol/g, respectively

    Influence of temperature and pressure conditions on the efficiency of natural gas preparation

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    ΠΠΊΡ‚ΡƒΠ°Π»ΡŒΠ½ΠΎΡΡ‚ΡŒ. Π’ послСдниС Π³ΠΎΠ΄Ρ‹ ΠΊΡ€ΠΎΠΌΠ΅ нСпосрСдствСнной Π΄ΠΎΠ±Ρ‹Ρ‡ΠΈ ΠΏΡ€ΠΈΡ€ΠΎΠ΄Π½ΠΎΠ³ΠΎ ΠΈΠ»ΠΈ ΠΏΠΎΠΏΡƒΡ‚Π½Ρ‹Ρ… нСфтяных Π³Π°Π·ΠΎΠ² ΠΈΠ· Π½Π΅Π΄Ρ€ ΠΈΡ… ΠΏΠΎΡ‚ΠΎΠΌ Π½Π΅ΠΎΠ±Ρ…ΠΎΠ΄ΠΈΠΌΠΎ ΠΏΠΎΠ΄Π³ΠΎΡ‚ΠΎΠ²ΠΈΡ‚ΡŒ, ΠΎΠ±Π΅ΡΠΏΠ΅Ρ‡ΠΈΡ‚ΡŒ Ρ‚ΠΎΠ²Π°Ρ€Π½ΠΎΠ΅ качСство, Π² частности, ΡƒΠ΄Π°Π»ΠΈΡ‚ΡŒ Π²Π»Π°Π³Ρƒ, Π²Ρ‹ΡΡˆΠΈΠ΅ ΡƒΠ³Π»Π΅Π²ΠΎΠ΄ΠΎΡ€ΠΎΠ΄Ρ‹ Π‘2+ ΠΈ Π΄Ρ€ΡƒΠ³ΠΈΠ΅ ΠΏΠΎΠ±ΠΎΡ‡Π½Ρ‹Π΅ Π½Π΅ ΡƒΠ³Π»Π΅Π²ΠΎΠ΄ΠΎΡ€ΠΎΠ΄Π½Ρ‹Π΅ Π³Π°Π·Ρ‹, ΠΊΠΎΡ‚ΠΎΡ€Ρ‹Π΅ ΠΎΡ‚Ρ€ΠΈΡ†Π°Ρ‚Π΅Π»ΡŒΠ½ΠΎ ΠΈ ΠΏΠ°Π³ΡƒΠ±Π½ΠΎ Π²Π»ΠΈΡΡŽΡ‚ Π½Π° Ρ‚Π΅Ρ…Π½ΠΈΠΊΠΎ-экономичСскиС ΠΏΠΎΠΊΠ°Π·Π°Ρ‚Π΅Π»ΠΈ Ρ€Π°Π±ΠΎΡ‚Ρ‹ установок ΠΈ ΡΠΏΠΎΡΠΎΠ±ΡΡ‚Π²ΡƒΡŽΡ‚ ΠΎΠ±Ρ€Π°Π·ΠΎΠ²Π°Π½ΠΈΡŽ кристаллогидратов. Π’ связи с высокими трСбованиями ΠΊ качСству ΠΏΠΎΠ΄Π³ΠΎΡ‚ΠΎΠ²Π»Π΅Π½Π½ΠΎΠ³ΠΎ ΠΏΡ€ΠΈΡ€ΠΎΠ΄Π½ΠΎΠ³ΠΎ Π³Π°Π·Π° ΠΈ с ростом влагосодСрТания Π² Π³Π°Π·Π΅ ΠΈΠ·-Π·Π° высокой стСпСни обводнСнности нСфтяных ΠΈ Π³Π°Π·ΠΎΠ²Ρ‹Ρ… мСстороТдСний, для ΠΏΠΎΠ²Ρ‹ΡˆΠ΅Π½ΠΈΡ Ρ€Π΅Π½Ρ‚Π°Π±Π΅Π»ΡŒΠ½ΠΎΡΡ‚ΠΈ Π΄ΠΎΠ±Ρ‹Ρ‡ΠΈ Π³Π°Π·Π°, Ρ‚Π΅Ρ…Π½ΠΎΠ»ΠΎΠ³ΠΈΠΈ ΠΏΠΎΠ΄Π³ΠΎΡ‚ΠΎΠ²ΠΊΠΈ Π³Π°Π·Π° постоянно ΡΠΎΠ²Π΅Ρ€ΡˆΠ΅Π½ΡΡ‚Π²ΡƒΡŽΡ‚ΡΡ ΠΈ ΠΎΠ±Π½ΠΎΠ²Π»ΡΡŽΡ‚ΡΡ, Π² Ρ‚ΠΎΠΌ числС ΠΈ абсорбционный ΠΌΠ΅Ρ‚ΠΎΠ΄ ΠΎΡΡƒΡˆΠΊΠΈ ΠΏΡ€ΠΈΡ€ΠΎΠ΄Π½ΠΎΠ³ΠΎ Π³Π°Π·Π° ΠΎΡ‚ примСсСй Π²ΠΎΠ΄Ρ‹. ЦСль: ΠΎΠ±ΠΎΡΠ½ΠΎΠ²Π°Ρ‚ΡŒ ΡΡ„Ρ„Π΅ΠΊΡ‚ΠΈΠ²Π½ΠΎΡΡ‚ΡŒ примСнСния триэтилСнгликоля Π² качСствС абсорбСнта ΠΏΡ€ΠΈ ΠΏΠΎΠ΄Π³ΠΎΡ‚ΠΎΠ²ΠΊΠ΅ ΠΏΡ€ΠΈΡ€ΠΎΠ΄Π½ΠΎΠ³ΠΎ Π³Π°Π·Π° абсорбционным ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠΌ Π½Π° Π΄Π΅ΠΉΡΡ‚Π²ΡƒΡŽΡ‰Π΅ΠΉ комплСксной установкС ΠΏΠΎΠ΄Π³ΠΎΡ‚ΠΎΠ²ΠΊΠΈ ΠΏΡ€ΠΈΡ€ΠΎΠ΄Π½ΠΎΠ³ΠΎ Π³Π°Π·Π°. ΠžΠ±ΡŠΠ΅ΠΊΡ‚: установка комплСксной ΠΏΠΎΠ΄Π³ΠΎΡ‚ΠΎΠ²ΠΊΠΈ ΠΏΡ€ΠΈΡ€ΠΎΠ΄Π½ΠΎΠ³ΠΎ Π³Π°Π·Π°. ΠœΠ΅Ρ‚ΠΎΠ΄: ΠΌΠΎΠ΄Π΅Π»ΠΈΡ€ΠΎΠ²Π°Π½ΠΈΠ΅ процСссов абсорбции Π²Π»Π°Π³ΠΈ ΠΈΠ· ΠΏΡ€ΠΈΡ€ΠΎΠ΄Π½ΠΎΠ³ΠΎ Π³Π°Π·Π° Π² ΠΏΡ€ΠΎΠ³Ρ€Π°ΠΌΠΌΠ½ΠΎΠΌ комплСксС Β«UniSim DesignΒ». Π Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹. ИсслСдовано влияниС тСхнологичСских ΠΏΠ°Ρ€Π°ΠΌΠ΅Ρ‚Ρ€ΠΎΠ² давлСния ΠΈ Ρ‚Π΅ΠΌΠΏΠ΅Ρ€Π°Ρ‚ΡƒΡ€Ρ‹, Π° Ρ‚Π°ΠΊΠΆΠ΅ Π΄Π²ΡƒΡ… абсорбСнтов: диэтилСнгликоля ΠΈ триэтилСнгликоля, Π½Π° ΡΡ„Ρ„Π΅ΠΊΡ‚ΠΈΠ²Π½ΠΎΡΡ‚ΡŒ процСссов ΠΏΠΎΠ΄Π³ΠΎΡ‚ΠΎΠ²ΠΊΠΈ Π³Π°Π·Π° Π½Π° ΠΌΠΎΠ΄Π΅Π»ΠΈ установки ΠΏΠΎΠ΄Π³ΠΎΡ‚ΠΎΠ²ΠΊΠΈ ΠΏΡ€ΠΈΡ€ΠΎΠ΄Π½ΠΎΠ³ΠΎ Π³Π°Π·Π° Π΄Π΅ΠΉΡΡ‚Π²ΡƒΡŽΡ‰Π΅Π³ΠΎ Π³Π°Π·ΠΎΠ²ΠΎΠ³ΠΎ промысла. УстановлСны ΠΎΠΏΡ‚ΠΈΠΌΠ°Π»ΡŒΠ½Ρ‹Π΅ Ρ‚Π΅ΠΌΠΏΠ΅Ρ€Π°Ρ‚ΡƒΡ€Π° ΠΈ Π΄Π°Π²Π»Π΅Π½ΠΈΠ΅, ΠΏΡ€ΠΈ ΠΊΠΎΡ‚ΠΎΡ€Ρ‹Ρ… процСсс абсорбции Π²Π»Π°Π³ΠΈ ΠΈΠ· ΠΏΡ€ΠΈΡ€ΠΎΠ΄Π½ΠΎΠ³ΠΎ Π³Π°Π·Π° Π±ΡƒΠ΄Π΅Ρ‚ Π½Π°ΠΈΠ±ΠΎΠ»Π΅Π΅ эффСктивно ΠΏΡ€ΠΎΡ…ΠΎΠ΄ΠΈΡ‚ΡŒ ΠΈ ΠΏΡ€ΠΈ ΡΠ½ΠΈΠΆΠ°ΡŽΡ‰Π΅ΠΌΡΡ Π΄Π°Π²Π»Π΅Π½ΠΈΠΈ Π²Ρ…ΠΎΠ΄Π½ΠΎΠ³ΠΎ ΡΡ‹Ρ€ΡŒΡ. Показано, Ρ‡Ρ‚ΠΎ ΠΏΡ€ΠΈ использовании триэтилСнгликоля Π² качСствС абсорбСнта для ΠΎΡΡƒΡˆΠΊΠΈ ΠΏΡ€ΠΈΡ€ΠΎΠ΄Π½ΠΎΠ³ΠΎ Π³Π°Π·Π° ΠΎΡ‚ Π²ΠΎΠ΄Ρ‹ Π·Π½Π°Ρ‡ΠΈΡ‚Π΅Π»ΡŒΠ½ΠΎ ΡƒΠΌΠ΅Π½ΡŒΡˆΠ°ΡŽΡ‚ΡΡ энСргозатраты Π½Π° ΠΊΠΎΠΌΠΏΡ€ΠΈΠΌΠΈΡ€ΠΎΠ²Π°Π½ΠΈΠ΅ Π³Π°Π·Π°, Π΅Π³ΠΎ ΠΎΡ…Π»Π°ΠΆΠ΄Π΅Π½ΠΈΠ΅ ΠΏΠ΅Ρ€Π΅Π΄ абсорбСром ΠΈ расход ΠΎΡΡƒΡˆΠΈΡ‚Π΅Π»Ρ ΠΏΠΎ ΡΡ€Π°Π²Π½Π΅Π½ΠΈΡŽ с диэтилСнгликолСм.The relevance. In recent years, in addition to the direct extraction of natural or associated petroleum gases from the subsoil, it is necessary to prepare them, ensure commercial quality, in particular, remove moisture, higher C2+ hydrocarbons and other by-product gases that adversely affect the technical and economic performance of plants and contribute to the formation of crystalline hydrates. Due to the high quality requirements for treated natural gas and moisture content growth to increase the profitability of production, gas treatment technologies are constantly being improved and updated, including the absorption method of natural gas drying. Purpose: to substantiate the effectiveness of the use of triethylene glycol as an absorbent in natural gas preparation by the absorption method at the existing integrated natural gas treatment plant. Object: complex natural gas treatment unit. Method: simulation of moisture absorption from natural gas in the UniSim Design software package. Results. The influence of pressure and temperature, two absorbents: diethylene glycol and triethylene glycol, on the efficiency of gas treatment on the model of a natural gas treatment plant, an operating gas field, has been studied. The optimal temperature and pressure are selected, at which moisture absorption from gas will most effectively take place at decreasing pressure of the input raw material. It is shown that when triethylene glycol is used as an absorbent, the energy consumption for gas compression, its cooling before the absorber, and the consumption of the desiccant are significantly reduced compared to diethylene glycol
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