共查询到19条相似文献,搜索用时 203 毫秒
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制备了聚合物/表面活性剂二元乳状液,考察了聚合物相对分子质量、聚合物质量浓度、表面活性剂质量分数、油水比(原油与聚合物/表面活性剂二元乳状液体积比)对二元乳状液稳定性的影响。结果表明:提高表面活性剂的质量分数和聚合物的质量浓度,采用相对分子质量较低的聚合物,降低油水比,有利于二元乳状液的稳定。 相似文献
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重烷基苯磺酸盐驱油剂中试产品的应用性能 总被引:5,自引:1,他引:5
在1000t/a降膜式连续磺化装置上对重烷基苯的磺化进行了中试放大,结果表明中试产品质量可靠。经复配的驱油剂中试产品能在较宽的表面活性剂浓度和碱浓度范围内与大庆原油、辽河原油及苏北原油形成超低界面张力,尤其能溶于总矿化度12×104mg/L、钙镁离子质量浓度为5000mg/L~6000mg/L的中原油田地层水中,在无碱条件下使中原油田原油/地层水的界面张力降至10-2mN/m~10-3mN/m数量级。对大庆原油和苏北原油的驱油试验表明,中试驱油剂ASP(碱-表面活性剂-聚合物)体系的驱油效率比水驱提高15%~35%OOIP(原油地层储量)。 相似文献
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胜利孤岛注聚原油破乳剂的筛选与性能评价 总被引:1,自引:0,他引:1
以研究孤岛注聚原油乳状液破乳为目的,通过瓶试法和界面性质的测定,筛选了多种类型的原油破乳剂,考察了破乳剂质量浓度、聚合物和原油组分对破乳效果的影响,探讨了原油乳状液的破乳机理。结果表明,破乳剂BF-069质量浓度在100mg/L,50℃条件下,脱水率达到70%以上,现场温度稍微升高,脱水率达到85%左右,破乳剂BF-069已在胜利油田应用,现场使用效果良好;聚合物质量浓度在50mg/L时,原油乳状液最难破乳;原油中不同组分对破乳效果的影响不同,油水界面性质的测定表明,胶质和沥青质是影响原油破乳的主要因素。 相似文献
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《化学工业与工程技术》2020,(3):42-46
以柴油乳状液模拟大庆油田三元复合驱油田采出水,采用瓶试法,考察了油水体积比,碱、表面活性剂、聚合物质量浓度,剪切速率,乳化时间对乳状液稳定性的影响,得到满足试验要求的柴油乳状液。使用恒温水浴锅加热破乳,采用激光粒度和Zeta电位仪测定粒径分布和Zeta电位,紫外可见分光光度计测定破乳后的柴油浓度。结果表明,破乳后水层含油量随着温度的升高而降低,平均粒径随着温度的升高而减小,60℃时的粒径分布峰随破乳时间而延长变宽,热破乳机理主要集中在降低油滴界面膜强度和降低体系黏度两方面。 相似文献
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改性碱木质素产品在三次采油中的应用研究 总被引:5,自引:0,他引:5
改性碱木质素(HML)作为牺牲剂可以显著地减少主表面活性剂石油磺酸钠ORS-41的吸附损失(减少量>50%),HML能和石油磺酸钠、碱、聚合物配合将油水界面张力降至超低范围,以0.15%改性木质素代替50%ORS-41表面活性剂,复合驱采收率可达到20%左右,略高于单纯应用0.3%ORS-41三元复合体系的复合驱采收率。改性碱木质素作为三次采油牺牲剂具有广阔的应用前景。 相似文献
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三元复合驱中原油乳化作用研究 总被引:4,自引:0,他引:4
通过乳状液稳定实验考察了大庆油田碱-表面活性剂-聚合物三元复合驱过程乳状液的形成机理、乳状液类型及稳定性。结果表明,大庆原油与碱反应1d时,测得其浓相体积分数为25%,所形成的乳状液为O/W型乳状液,而随着原油与碱作用时间的增加,其浓相体积分数达到40%以上,形成W/O型乳状液,且乳状液稳定性随作用时间增加而增强。大庆原油与水溶性表面活性剂ORS-41溶液作用时,所形成的乳状液为O/W型,且乳状液的稳定性与原油和ORS-41作用时间的长短关系较小。原油与NaOH和ORS-41混合溶液作用时,形成上层为W/O型乳状液,下层为O/W型乳状液的混合体系。 相似文献
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Acidic Heavy Oil Recovery Using a New Formulated Surfactant Accompanying Alkali–Polymer in High Salinity Brines
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Ali Akbar Dehghan Adel Jadaly Shahab Ayatollahi Mohsen Masihi 《Journal of surfactants and detergents》2017,20(3):725-733
The strength of a newly formulated surfactant with an alkali and polymer (AS/ASP) to improve an acidic heavy oil recovery was laboratory evaluated by various flooding experiments. The comparative role of the parameters like chemical nature, surface wettability, salinity, temperature and injection scheme were explored at high temperature and pressure on Berea sandstone rocks. According to the results the anionic surfactant is capable of providing proper oil displacement under high salinity conditions around 15 wt%. Continuous monitoring of differential pressure response and effluents’ state clearly represented the formation of an emulsified oil in high saline solutions with both alkali and surfactant. Adding sodium metaborate to the surfactant solution reduced the interfacial tension (IFT) to ultra low values and decreased the surfactant emulsion generation capability at higher salinities. Besides, adding Flopaam AN113SH to the chemical slug increased the residual oil removal owing to lower mobility ratios. So, while high capillary number and an emulsion phase were generated by the A/S slug phases, adding polymer could further enhance the performance of these chemicals. On the other hand, chemical flooding through the oil-wet medium resulted in shorter break through time, lower differential pressure, finer emulsion formation, and lower oil recovery in comparison to the similar water-wet cases. 相似文献
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实验研究了水包油型乳化液油滴在管内节流元件处的破碎行为,分析了破碎机理. 结果表明,液滴破碎主要发生在节流元件内壁及下游附近,其概率是施于液滴上湍流应力与液滴表面能之比的递增函数,是流体韦伯数及节流元件两侧最大压差的递增函数;在湍流状态(Re>4000)下,液滴充分振荡且受到较大的水流惯性力和速度梯度剪切力,更易破碎;由苏丹红IV染色的正庚烷体系界面张力由非染色时的47 mN/m降到23.6 mN/m,黏性力对液滴破碎的影响程度下降,受流速、压差等影响的惯性力起决定性作用,液滴破碎程度更大;流速决定流体对分散相油滴的湍流剪切破碎力,流速增大则油滴粒径破裂程度加大,而流速取决于流量和节流比;注入染色正庚烷油相体积增大(0.5~5 mL),削弱了节流元件的液滴破碎作用,两相流体系倾向于形成更大直径的液滴,中位径一般为20~35 mm. 相似文献
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油藏对表面活性剂的吸附作用,是砂岩表面化学物质与表面活性剂间相互作用的结果。ASP复配体系溶液中,碱对表活剂的吸附影响较大,在表活剂溶液中加入碱后,砂岩对表活剂的吸附量下降,且吸附量下降幅度与碱浓度成正比。实验结果表明,碱可以使粘土矿物对阴离子表面活性剂吸附量降低70%~80%,而油藏砂岩对表活剂吸附量可降低10%~40%。聚合物对表活剂的吸附影响较小,数值模拟结果表明吸附量降低15%~30%。这是由于聚合物在表活剂溶液中水解后,部分分子团带有负电荷,这就抑制了砂岩对表活剂的吸附作用;另外,加入聚合物后,复配体系溶液变稠,使得溶液扩散速率降低,减小波及体积,进而削弱表活剂吸附效果。 相似文献
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Vincent Cantarel David Lambertin Arnaud Poulesquen Fabrice Leroux Guillaume Renaudin Fabien Frizon 《Ceramics International》2018,44(9):10558-10568
This work investigates emulsion templating to synthesize hexadecane oil/geopolymer composites. In a system with hexadecane as the internal (dispersed) phase and an alkali activated continuous phase without added surfactant, adding aluminosilicate clay particles does not increase resistance against creaming or coalescence, while adding a surfactant (L35 or CTAB) stabilizes the solid-liquid interface. Infrared studies and rheological studies of the associated geopolymerization determined that the presence of the organic phase or surfactant has no significant effect on the geopolymerization kinetics, as determined by the change in time of the Si-O-T IR stretching frequency and the rheological moduli involved during the process. The stabilization of the organic template is reminiscent of Pickering emulsion even though we employ a much greater amount of inorganic material for geopolymer formation. Although the addition of surfactant has a significant effect on the behavior of the paste, the percolation of the network remains unmodified, highlighting the fact that the phenomenon is not dependent on viscosity. Finally, rheological measurements were used to obtain the mass fractal dimension of the as-made gel network, which is able to differentiate the interfacial effect between surfactant molecules with a slightly denser interphase when a cationic surfactant is used. 相似文献
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《Fuel》2005,84(2-3):183-187
The alkaline–surfactant–polymer flooding using sodium hydroxide as the alkali component to enhance oil recovery at the on shore oil fields at Daqing in China has brought new problems for the oil industry. Even though, the reservoir contained paraffinic crude oil, the alkali added formed stable water-in-crude oil emulsion and de-emulsification process was necessary to separate oil and water.The problems related in the enhanced oil recovery process using the alkaline–surfactant–polymer flooding technique in the Daqing oil field have been investigated in the laboratory using fractions of Daqing crude oil. The oil was separated into asphaltene and aliphatic fractions and then used in an additive free jet oil to form model oils. The emulsion stability of each of the water-in-model oil emulsions formed between water or 0.6% sodium hydroxide solution and model oil was investigated. The interfacial properties such as interfacial tension and interfacial pressure of the systems were also measured. These in combination with the chemical nature of the fractions were used to get insight into the problem related to the ASP flooding technique using sodium hydroxide as the alkaline component.The study reveals that the sodium hydroxide solution reacts with fatty acids in the aliphatic fraction of the crude oil and/or with the fatty acids formed from the slow oxidation of long chain hydrocarbons, and form soap like interfacially active components. These accumulate at the crude oil–water interface and contribute to the stability of the oil/water emulsion. 相似文献