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

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

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

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

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

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

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

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 ‘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 °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 °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

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 ‘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 °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 °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

Актуальность. В последние годы кроме непосредственной добычи природного или попутных нефтяных газов из недр их потом необходимо подготовить, обеспечить товарное качество, в частности, удалить влагу, высшие углеводороды С2+ и другие побочные не углеводородные газы, которые отрицательно и пагубно влияют на технико-экономические показатели работы установок и способствуют образованию кристаллогидратов. В связи с высокими требованиями к качеству подготовленного природного газа и с ростом влагосодержания в газе из-за высокой степени обводненности нефтяных и газовых месторождений, для повышения рентабельности добычи газа, технологии подготовки газа постоянно совершенствуются и обновляются, в том числе и абсорбционный метод осушки природного газа от примесей воды. Цель: обосновать эффективность применения триэтиленгликоля в качестве абсорбента при подготовке природного газа абсорбционным методом на действующей комплексной установке подготовки природного газа. Объект: установка комплексной подготовки природного газа. Метод: моделирование процессов абсорбции влаги из природного газа в программном комплексе «UniSim Design». Результаты. Исследовано влияние технологических параметров давления и температуры, а также двух абсорбентов: диэтиленгликоля и триэтиленгликоля, на эффективность процессов подготовки газа на модели установки подготовки природного газа действующего газового промысла. Установлены оптимальные температура и давление, при которых процесс абсорбции влаги из природного газа будет наиболее эффективно проходить и при снижающемся давлении входного сырья. Показано, что при использовании триэтиленгликоля в качестве абсорбента для осушки природного газа от воды значительно уменьшаются энергозатраты на компримирование газа, его охлаждение перед абсорбером и расход осушителя по сравнению с диэтиленгликолем.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