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Experimental investigation of chemical solutions effects on wettability alteration and interfacial tension reduction using nano-alkaline–surfactant fluid: an EOR application in carbonate reservoirs
Journal of Petroleum Exploration and Production Technology ( IF 2.2 ) Pub Date : 2021-04-11 , DOI: 10.1007/s13202-021-01155-9
M. Sadegh Rajabi , Rasoul Moradi , Masoud Mehrizadeh

The wettability preference of carbonate reservoirs is neutral-wet or oil-wet as the prevailing of hydrocarbon reserves that affects approximately half of the total production of hydrocarbons of the world. Therefore, due to surface wettability of carbonate rocks the notable fraction of oil is held inside their pores in comparison with sandstones. Since shifting the wettability preference toward water-wet system is of great interest, numerous components were used for this purpose. In this experimental research, the wettability alteration of dolomite surface by interacting with a novel nano-surfactant–alkaline fluid has been investigated in order to diminish its adhesion to crude oil droplets. The solutions were prepared by homogenous mixing of nanosilica particles with cetyl trimethyl ammonium bromide and sodium carbonate, respectively, as a cationic surfactant and alkaline agent. The maximum wettability alteration from oil-wet to water system was obtained by employing a mixture of nanoparticles in association with surfactant–alkaline. Then, the fluids were employed in core-surface from detached and attached forms to compare their interfacial effects on saturated thin sections by crude oil and to measure the wettability. In addition, the interfacial tension (IFT) between solutions and crude oil was investigated and the maximum IFT reduction was obtained from nano-surfactant. Finally, all chemical solutions were flooded to the dolomite plugs separately after water flooding in order to evaluate the maximum oil recovery factor acquired by nano-surfactant.



中文翻译:

化学溶液对使用纳米碱性表面活性剂流体的润湿性改变和界面张力降低的影响的实验研究:在碳酸盐岩储层中的EOR应用

碳酸盐岩储层的可湿性偏爱是中性湿润或油湿性,这是因为碳氢化合物储量占主导地位,影响了世界碳氢化合物总产量的大约一半。因此,由于碳酸盐岩石的表面润湿性,与砂岩相比,石油的显着部分保留在其孔隙内。由于将润湿性偏好转向水润湿体系引起了极大的兴趣,因此为此目的使用了许多组件。在本实验研究中,已经研究了通过与新型纳米表面活性剂-碱性流体相互作用来改变白云石表面的润湿性,以减少其对原油滴的粘附力。通过分别将纳米二氧化硅颗粒与十六烷基三甲基溴化铵和碳酸钠均匀混合来制备溶液。作为阳离子表面活性剂和碱性剂。通过将纳米颗粒与表面活性剂-碱结合使用,可以实现从油湿到水系统的最大润湿性变化。然后,将流体以分离和附着的形式用于岩心表面,以比较它们对原油对饱和薄层的界面影响,并测量润湿性。此外,研究了溶液与原油之间的界面张力(IFT),并从纳米表面活性剂获得了最大的IFT降低。最后,注水后将所有化学溶液分别注入白云岩塞中,以评估纳米表面活性剂获得的最大采油率。通过将纳米颗粒与表面活性剂-碱结合使用,可以实现从油湿到水系统的最大润湿性变化。然后,将流体以分离和附着的形式用于岩心表面,以比较它们对原油对饱和薄层的界面影响,并测量润湿性。此外,研究了溶液与原油之间的界面张力(IFT),并从纳米表面活性剂获得了最大的IFT降低。最后,注水后将所有化学溶液分别注入白云岩塞中,以评估纳米表面活性剂获得的最大采油率。通过将纳米颗粒与表面活性剂-碱结合使用,可以实现从油湿到水系统的最大润湿性变化。然后,将流体以分离和附着的形式用于岩心表面,以比较它们对原油对饱和薄层的界面影响,并测量润湿性。此外,研究了溶液与原油之间的界面张力(IFT),并从纳米表面活性剂获得了最大的IFT降低。最后,注水后将所有化学溶液分别注入白云岩塞中,以评估纳米表面活性剂获得的最大采油率。将该流体以分离和附着的形式用于岩心表面,以比较它们对原油对饱和薄层的界面作用并测量润湿性。此外,研究了溶液与原油之间的界面张力(IFT),并从纳米表面活性剂获得了最大的IFT降低。最后,注水后将所有化学溶液分别注入白云岩塞中,以评估纳米表面活性剂获得的最大采油率。将该流体以分离和附着的形式用于岩心表面,以比较它们对原油对饱和薄层的界面作用并测量润湿性。此外,研究了溶液与原油之间的界面张力(IFT),并从纳米表面活性剂获得了最大的IFT降低。最后,注水后将所有化学溶液分别注入白云岩塞中,以评估纳米表面活性剂获得的最大采油率。

更新日期:2021-04-11
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