Mechanistic understanding of chemical flooding in swelling porous media using a bio-based nonionic surfactant

Physicochemical characterization and optimization of glycolipid biosurfactant production by a native strain ofPseudomonas aeruginosaHAK01 and its performance evaluation for the MEOR process

“…The produced BS was found to be of the rhamnolipid type aer structure analysis by TLC, FTIR and NMR analysis. It showed signicant stability under extreme conditions of temperature (40-121 C), pH (3)(4)(5)(6)(7)(8)(9)(10) and salinity up to 10% (w/v), which is very important in enhanced oil recovery applications. Its surface activity was determined by measurement of surface tension, CMC and the emulsication index (E24).…”

“…5,6 Despite their abundant advantageous over synthetic surfactant and their wide application in different industries, rhamnolipids could not compete with synthetic surfactants due to high production costs. 7,8 Low productivity of biomaterials is always one of the main bottlenecks for future commercial applications. So, the scientists try to increase the yield of bio-products by the methods such as gene manipulation of the microorganism and culture condition optimization.…”

Investigation of synergistic effects between silica nanoparticles, biosurfactant and salinity in simultaneous flooding for enhanced oil recovery

“…Similarly, the comparison of the pair tests (3,5) and (13,15) shows that increasing the BS concentration positively affects oil recovery, especially at lower NP concentrations. A closer look at the nal oil recovery differences (10%, 6%, 7.5%, and 11.5%) shows that the BS concentration enhancement was more effective than NP concentration increase for oil recovery.…”

“…3.2.4 The effect of salinity enhancement. The nal oil recovery differences for the pair tests of (6,15), (2,5), (18,13), and (14,3) are demonstrated in Fig. 8; in these tests, the salinity difference was 1 wt% and oil recovery differences were 5.5%, 2.0%, 1.5%, and 0.0%, respectively.…”

“…However, these stages are not efficient enough to produce a considerable amount of oil due to high capillary forces, which result in low oil recovery. [1][2][3] The methods to further increase the sweep efficiency and enhance oil recovery comprise tertiary recovery or enhanced oil recovery (EOR). Nowadays, applying new methods such as biotechnology and nanotechnology in EOR has aroused much attention.…”