Abstract
This paper presents the investigation of using nanoscale polyacrylamide-based spheres (nanospheres) as a displacement fluid in enhanced oil recovery (EOR). Coreflood experiments were conducted to evaluate the impact of nanospheres and its concentration dispersed in model formation water on oil recovery during a tertiary oil recovery process. The coreflood results showed that nanospheres can enhance residual oil recovery in the sandstone rock samples and its concentration showed a significant impact into incremental oil. By evaluating the contact angle, it was observed that wettability alteration also might be involved in the possible oil displacement mechanism in this process together with fluid behavior and permeability to water that might divert injected fluid into unswept oil areas and enhance the residual oil recovery. These investigations promote nanospheres aqueous disperse solution as a potential displacement fluid in EOR.
Highlights
The nanotechnology is chosen as an alternative method to unlock the remaining oil resources and applied as a new enhanced oil recovery (EOR) method in lastJ
This paper presents the investigation of using nanoscale polyacrylamide-based spheres as a displacement fluid in enhanced oil recovery (EOR)
Coreflood experiments were conducted to evaluate the impact of nanospheres and its concentration dispersed in model formation water on oil recovery during a tertiary oil recovery process
Summary
The nanotechnology is chosen as an alternative method to unlock the remaining oil resources and applied as a new enhanced oil recovery (EOR) method in lastJ. Polymeric microspheres and nanospheres have been applied as water mobility control both as a pilot and full-field, and showed fantastic results in reducing water cut, increasing sweep efficiency and improving oil recovery (Yuan et al 2010; Li et al 2012; Tian et al 2012). They reported that polymeric microspheres and nanospheres can swell when meet with water and reduce water permeability due to its ability of reducing the capillary force and change water flow path. The impact of this polymeric microspheres and nanospheres to wettability alteration of rock is
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