共查询到20条相似文献,搜索用时 15 毫秒
1.
2.
3.
4.
In this study, the effect of temperature on interfacial tension between crude oil and ethoxylated nonylphenols, with ethoxy group numbers of 4 and 9, was investigated. The interfacial tension was measured using the rising drop technique. Above the critical micelle concentration, the interfacial tension passed through a minimum when the temperature increased. Below the critical micelle concentration, the interfacial tension and time needed to reach equilibrium interfacial tension was reduced when the temperature increased. For a mixture of a two-surfactant system, interfacial tension was not sensitive to the temperature because of formation of mixed micellar aggregates. 相似文献
5.
Fardin Shakeri Houman Darvish Hamid Garmsiri 《Petroleum Science and Technology》2018,36(9-10):648-653
The worldwide demand for energy increases and also the price of crude oil increases so these reasons have been caused the searchers have motivated to investigate enhanced of oil recovery (EOR) processes. The carbon dioxide injection is recognized as one of the favorable approaches of EOR because of high displacement efficiency, environmentally aspects and lower cost. The Interfacial tension between crude oil and carbon dioxide is known as one of the critical factors which affect the performance of injection. The main objective of the present investigation is development of Fuzzy c-means (FCM) approach as novel method to estimate interfacial tension between carbon dioxide and hydrocarbons as function of pressure, temperature, liquid and gas densities and molecular weight of alkane. The performance of predicting model was evaluated statistically and graphically and the results confirmed the ability of the model to predict interfacial tension between carbon dioxide and hydrocarbons. 相似文献
6.
Houman Darvish Siamak Rahmani Ashkan Maleki Sadeghi Mohammad Hosein Emami Baghdadi 《Petroleum Science and Technology》2018,36(9-10):654-659
The interfacial tension of hydrocarbons and brine is known as one of the important parameters which are measured in petroleum and petrochemical industries for example the interfacial tension has straight effect on trapping of oil in a reservoir. In the present work the Adaptive neuro-fuzzy inference system (ANFIS) algorithm was used as a novel approach for estimation of interfacial tension between hydrocarbons and brine as function of pressure, temperature, carbon number of hydrocarbon and ionic strength of brine then the particle swarm optimization (PSO) was used to optimize the predicting model parameters.in order to better evaluation of performance of predicting algorithm the coefficient of determination (R2), average absolute relative deviation (AARD) and root mean squared error (RMSE) were estimated for different steps. The outcomes of this investigation expressed that proposed model has high potential for prediction of interfacial tension between hydrocarbons and brine. 相似文献
7.
Amin Kiomarsiyan 《Petroleum Science and Technology》2019,37(14):1620-1625
The oil recovery reservoirs and oil trapping in the reservoirs are extensively function of interfacial tension between brine and hydrocarbon, so estimation of interfacial tension becomes one of the interesting topics in petroleum industry. In this study, Grid partitioning based Fuzzy inference system method is utilized to forecast interfacial tension of hydrocarbon and brine based on various effective parameters such as ionic strength of brine, carbon number of hydrocarbon, pressure, and temperature. The estimated values of interfacial tension were compared with real interfacial tension of brine and hydrocarbon using graphical and statistical analyses. The determined coefficients of determination (R2) for training and testing phases were 0.9916 and 0.9447, respectively. The comparing analyses express that the Grid partitioning based Fuzzy inference system method has great ability in prediction of interfacial tension, and it can be used as an applicable tool in petroleum industry. 相似文献
8.
超低界面张力泡沫体系驱先导性矿场试验研究 总被引:20,自引:3,他引:17
超低界面张力泡沫体系驱是一种全新的三次采油方法,驱油效果优于三元复合驱,可比水驱提高采收率25%左右。通过室内综合研究,确定了超低界面张力泡沫体系驱试验方案,并在大庆油田进行了先导性矿场试验。试验结果,油层中有大量泡沫生成,扩大了波及体积,提高了洗油效率,注入井注入压力上升,注采压差大幅度增加,吸液指数和产液指数大幅度下降,增油降水效果显著,气窜现象得到抑制。超低界面张力泡沫体系驱应该采用双管分注工艺,否则易产生水化物;由于注气压力较高,应采用更高性能的压缩机设备,以保证达到设计的气液比要求。图3表3参10 相似文献
9.
Mohammad Hosein Emami Baghdadi Houman Darvish Hesam Rezaei Mohammad Savadinezhad 《Petroleum Science and Technology》2018,36(15):1170-1174
One of the critical parameters in petroleum and chemical engineering is the interfacial tension between brine and hydrocarbon which has major effects on trapping and residual oil in reservoir pore throat so it becomes one of the interesting topics in enhancement of oil recovery in this work Least squares support vector machine (LSSVM) algorithm was applied as a novel predicting machine for prediction of interfacial tension of brine and hydrocarbons in terms of hydrocarbon carbon number, temperature, pressure and ionic strength of brine. A total number of 175 interfacial tensions were collected from literature in the purpose of training and testing of the model. The root mean squared error (RMSE), average absolute relative deviation (AARD) and the coefficient of determination (R2) were calculated overall datasets as 0.23964, 0.27444 and 0.98509 respectively. The results of study showed that predicting LSSVM machine can be applicable for estimation of interfacial tension and EOR processes. 相似文献
10.
通过预接触时间、红外谱图分析等手段研究了原油中活性物质对复合体系界面张力的影响.结果表明,随着预接触时间的增加,原油与复合体系的界面张力最低值逐渐上升,最终与平衡值相同;而直馏煤油与复合体系的界面张力最低值和平衡值几乎相等,且不受接触时问影响;原油中的活性物质由油水界面向水相扩散并最终达到平衡,并且界面张力在达到最低值前后均与t-1/2(t为实验时间)成线性关系,符合扩散规律;对油相和水相进行红外谱图和质谱分析后发现,在与碱接触后,油相的活性物质减少,水相中活性物质增加,验证了原油中的活性物质对降低界面张力起到重要作用. 相似文献
11.
通过用不同界面张力体系和原油进行乳化实验,制备出一系列不同数量级的界面张力值和不同乳化效果的样品。并且考察了样品界面张力性能和乳化性能的对应关系。研究了界面张力性能和乳化程度的关系。 相似文献
12.
系统地研究了工业木素磺酸盐与大庆原油形成低界面张力的条件。研究证明 ,单纯工业木素磺酸盐不能与大庆原油形成超低界面张力 ,但与多种活性剂能产生协同效应 ,添加少量石油磺酸盐、碱为助剂配制的工业木素磺酸盐三元复合体系与大庆原油间的界面张力可以达到 10 -3 mN/m~ 10 -4 mN/m数量级。 相似文献
13.
实验模拟伊朗西南部的阿瓦兹-班吉斯坦油田原油组分中的烷烃成分,不考虑沥青质,结合传统测界面张力的高压悬滴法和先进的计算机图像处理软件,分别测量了40℃和60℃下、压力范围分别为3.0~8.5 MPa和3.0~9.5 MPa时混合烷烃和被NaCl溶液饱和后的CO_2之间的界面张力,用外推法得到了对应的最小混相压力,成功验证了该方法的可行性,并对比文献讨论了实验结果。主要从原油组成成分和系统温度分析影响界面张力随压力的变化趋势,结果表明,低碳正构烷烃可以加快界面张力随压力下降的速度,高温下影响界面张力的综合因素造成压力关键点的形成。 相似文献
14.
陈庄原油超低界面张力驱油体系研究 总被引:1,自引:1,他引:0
开展了单一表面活性剂体系、表面活性剂复配体系及碱+表面活性剂体系与陈庄原油间动态界面张力的测定实验。实验结果表明:CBET-13在较宽的质量分数范围内(0.05%~0.15%)可以使油水界面张力达到超低;质量比为4∶1的SLPS与KAS复配体系,当总质量分数在0.075%~0.15%的范围内可以使油水界面张力平衡值降至10-4 mN/m数量级;总有效质量分数为0.1%、质量比在(9∶1)~(6∶4)范围内的CBET-13与CBET-17复配体系使油水界面张力降到超低;0.2%NaOH+((0.05%~0.2%)SLPS、(0.025%~0.05%)AS-0-4、(0.01%~0.075%)AS-3-0、(0.03%~0.09%)HSBET-12)体系可以使油水界面张力降至10-3 mN/m以下。以上体系,可以作为陈庄油田超低界面张力驱油配方的选择。 相似文献
15.
用界面张力法测定CO2与原油的最小混相压力 总被引:1,自引:0,他引:1
采用悬滴法,测定了在模拟地层温度为356.5K、压力为8.54~23.43MPa时的CO2与原油间的界面张力.实验发现,CO2与原油间的界面张力随压力的增加近似呈线性下降趋势.对该数据进行了线性回归,并用外推法计算出当界面张力为零时的最小混相压力为24.17MPa,与实验观测达到一次接触混相状态时的压力(23.43MPa)相比,相对误差为3.16%.采用界面张力确定CO2与原油间的最小混相压力,既可通过直接观测接触混相状态确定,也可利用所测界面张力数据进行估算,操作简单易行,且耗时少. 相似文献
16.
为提高化学驱油技术的使用效率,有效掌握表面活性剂的界面张力变化因素,开展了原油组分对表面活性剂界面张力的影响研究。应用原油分离提纯技术、GC-MS、红外光谱和核磁共振分析方法,从原油中分离出石油酸,分析其组分间的相互关系,总结界面张力变化规律。实验结果表明,原油组分中石油酸是影响界面张力的主要成分,其中异构脂肪酸是降低界面张力的重要贡献者。 相似文献
17.
Zhe Sun Xiaodong Kang Xiangguo Lu Qiang Li Xingcai Wu 《Petroleum Science and Technology》2013,31(23):2315-2321
AbstractThis paper researches the oil property from three different districts in Daqing Oilfield. And then the sulfur contents in crude oil and emulsified oil is tested to explore the dissolution of surfactant into oil phase. Furthermore, the influence of oil property on the interfacial tension and oil displacement effect are studied. Results indicates that, according to the theory that similarities can be solvable easily in each other, the surfactant is likely to enter the crude oil with more heavy components. And thus few of them adsorb at the oil-water interface and the activity reduces. As a result, the interfacial tension increases, which causes the oil displacement effect to become worse. 相似文献
18.
复合驱界面张力与驱油效率的关系研究 总被引:15,自引:2,他引:15
针对大庆油田油层的具体情况,实验采用3种不同类型的表面活性剂配制了三元复合驱油体系,并在3组不同渗透率人造均质岩心上进行了微观驱油实验,研究了不同体系的界面张力与驱油效率的关系。实验结果表明:在渗透率相同的条件下,驱油体系与原油之间的界面张力越低,驱油效率越高;在驱油体系相同的条件下,具有中等渗透率岩心的驱油效率更高一些。超低界面张力并不是绝对必要的。 相似文献
19.
钙镁离子能使ASP复合驱配方与原油产生的超低界面张力大幅度升高,主要是因为体系中生成了CaR2、MgR2分子。但当CaR2、MgR2转变成CaCO3、Mg(OH)2沉淀后,ASP配方体系与原油间界面张力仍能降至超低 相似文献
20.
动态界面张力特征及影响因素研究 总被引:7,自引:1,他引:6
袁庆胜 《油气地质与采收率》2003,10(3):59-61
采用旋转滴界面张力仪,研究了三元复合驱油体系中影响界面张力的有关因素,建立了界面反应模型,并提出了表征该驱油体系特征的浓度窗口和时间窗口等界面参数。结果表明,碱浓度影响动态界面张力的初始值、最低值以及时间窗口,最佳动态界面张力与表面活性剂组成及油相组成有重要的关系。 相似文献