|تعداد مشاهده مقاله||104,953,949|
|تعداد دریافت فایل اصل مقاله||82,027,579|
Experimental Investigation of the Effect of Calcium Lignosulfonate on Adsorption Phenomenon in Surfactant Alternative Gas Injection
|Journal of Chemical and Petroleum Engineering|
|مقاله 6، دوره 45، شماره 2، اسفند 2011، صفحه 141-151 اصل مقاله (574.43 K)|
|نوع مقاله: Original Paper|
|شناسه دیجیتال (DOI): 10.22059/jchpe.2011.1515|
|Mohammad Amin Safarzadeh؛ Seyyed Alireza Tabatabaei Nejad ؛ Eghbal Sahraei|
|Chemical Engineering Department, Sahand University of Technology, Tabriz, Iran|
|Fractional flow analysis confirms the advantages of surfactant alternative gas injection (SAG) in enhanced oil recovery, but an adsorption phenomenon that has been affected by several factors, weakens the effectiveness of SAG injection. In this study, the effects of sacrificial agent, gas phase, and surfactant concentration on adsorption density on silica mineral were investigated by static and dynamic adsorption experiments. A series of SAG tests were performed to examine the effect of injection rates and presence of Calcium Lignosulfonate (CLS) on oil recovery. Also, variation of effluent sodium dodecyl sulfate (SDS) concentration during SAG test was examined. Spectrophotometric method based on the formation of an ion-pair was used in all experiments for determination of SDS concentration. The results of adsorption experiments show that SDS adsorption density on silica was reduced when nitrogen was imposed instead of using methane. It can be reduced with addition of CLS as sacrificial agents and amount of adsorption reduction increases as concentration increases. Flooding experiment results show that SAG injection increase ultimate recovery up to 10% in comparison with water alternative gas (WAG) injection. Increasing viscosity of gas phase and its trapping in porous media results a decrease in the mobility of gas and an increase in oil recovery. Stability of formed foam in porous media is rate-depended and higher SDS adsorption was observed at first cycle of SAG injection due to high solid/liquid interaction. Using CLS slightly increases the ultimate oil recovery, while it decreases the adsorption density of SDS about 22 percent during the SAG test.|
|Surfactant alternative gas (SAG)؛ Oil Recovery؛ Adsorption؛ Ion pair؛ Sodium Dodecyl Sulfate؛ Calcium Lignosulfonate (CLS)؛ Mobility control|
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