Peng Wei, W. Pu, Lin Sun
Dec 1, 2018
Citations
0
Influential Citations
12
Citations
Journal
Journal of Petroleum Science and Engineering
Abstract
Abstract Few studies have delved into the effect of low molecular alcohol on foam stability. This study firstly investigated the improvement in adsorption behavior and viscoelastic behavior at the surface of the APG solution in the presence of isoamyl alcohol, and then we observed that isoamyl alcohol could hinder the liquid drainage and retard the foam rupture by introducing the stabilization capacity (i.e., reducing the surface tension, increasing the surface viscoelasticity, creating the H-bond and providing the disjoining pressure). Afterwards, the addition of isoamyl alcohol can efficiently diminish the defoaming effect of crude oil and impose a considerable oil resistant in foam system. Finally, the flooding experiments were conducted in the tight formation. The results indicate that APG-alcohol foam presents a fine texture and reaches the maximum apparent viscosity at the transition foam quality of 0.67. As presented in the NMR experiment, APG-alcohol foam can efficiently displace the oil in pores with various sizes and substantially promote the EOR to 30.35%.