Your browser doesn't support javascript.
loading
In situ micro-emulsification during surfactant enhanced oil recovery: A microfluidic study.
Zhao, Xuezhi; Zhan, Fuxing; Liao, Guangzhi; Liu, Weidong; Su, Xin; Feng, Yujun.
Afiliación
  • Zhao X; Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, People's Republic of China.
  • Zhan F; Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, People's Republic of China.
  • Liao G; PetroChina Exploration & Production Company, Beijing 100007, People's Republic of China.
  • Liu W; Research Institute of Petroleum Exploration & Development, PetroChina Company Limited, Beijing 100083, People's Republic of China.
  • Su X; Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, People's Republic of China.
  • Feng Y; Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, People's Republic of China. Electronic address: yjfeng@scu.edu.cn.
J Colloid Interface Sci ; 620: 465-477, 2022 Aug 15.
Article en En | MEDLINE | ID: mdl-35447575
HYPOTHESIS: It is generally believed that the improved efficiency of surfactant enhanced oil recovery (EOR) comes from ultra-low interfacial tension (IFT) between oil and surfactant solution owing to the formation of middle-phase microemulsion. However, hindered visibility in underground porous media prevents direct observation of in situ generation of middle-phase microemulsion during surfactant flooding. Thus, direct visualization of the process is vital, and could clarify its contribution to EOR. EXPERIMENTS: Micro-emulsification of a displacing fluid containing sodium 4-dodecylbenzenesulfonate and alcohol propoxy sulfate with model oil was investigated. Phase diagrams were drawn using salinity scans, and the influence of polymer on emulsification was analyzed. Micro-emulsification was monitored through in situ fluorescent tagging via 2D-microfluidics and ex situ visualization via cryo-electron microscopy and small angle X-ray scattering. Its contribution to the oil recovery factor was quantified by measuring the volume of each phase in the eluates. FINDINGS: On-chip experiments indicated that in situ micro-emulsification occurred when the prescreened surfactant solution flowed in contact with trapped oil. The aqueous phase initially invaded the residual oil, forming a low mobility microemulsion. This microemulsion was then diluted by subsequent displacing fluid, forming a new driving fluid that caused ultra-low IFT in the trapped oil downstream. Under the synergistic effect of micellar solubilization and trapped-oil mobilization, the recovery factor could be increased by up to 40% over waterflooding and 43% on polymer inclusion in the formulation.
Asunto(s)
Palabras clave
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Tensoactivos / Surfactantes Pulmonares Tipo de estudio: Prognostic_studies Idioma: En Revista: J Colloid Interface Sci Año: 2022 Tipo del documento: Article Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Tensoactivos / Surfactantes Pulmonares Tipo de estudio: Prognostic_studies Idioma: En Revista: J Colloid Interface Sci Año: 2022 Tipo del documento: Article Pais de publicación: Estados Unidos