Experimental and mechanism study: Partially hydrolyzed polyacrylamide gel degradation and deplugging via ultrasonic waves and chemical agents

Recent applications of ultrasonic waves in improved oil recovery: A review of techniques and results

“…Overall, it was found that ultrasound enhanced the applied techniques and improved pore permeability [34], [36], [37]. The ultrasound properties (20 kHz, 1000 W and 100 mins sonication time) were effective in removing the formation damage [36], [37].…”

“…Ultrasound has also been used together with other techniques to fight formation damage caused by drilling and completion fluids [34], pore blockage by mud cake and mud particles [35] and fines [36], and partially hydrolyzed Polyacrylamide (PHPAM)-induced formation damage [37]. Overall, it was found that ultrasound enhanced the applied techniques and improved pore permeability [34], [36], [37]. The ultrasound properties (20 kHz, 1000 W and 100 mins sonication time) were effective in removing the formation damage [36], [37].…”

Effects of reservoir rock pore geometries and ultrasonic parameters on the removal of asphaltene deposition under ultrasonic waves

“…Ultrasound has also been used, often in conjunction with other methods, to remove; formation damage caused by drilling and completion fluids [28] , pore blockage by mud cake and mud particles [15] and fines [29] , and partially hydrolyzed Polyacrylamide (PHPAM)-induced formation damage [34] . In general, it was found that ultrasound augmented the applied methods and increased pore permeability [28] , [29] , [34] . The ultrasound parameters (20 kHz, 1000 W and 100 mins sonication time) were effective in removing the formation damage [29] , [34] .…”

Treatment of partially hydrolyzed polyacrylamide by mixed bacteria isolated from wastewater

“…Currently, hydrolyzed polyacrylamide (HPAM) has been widely applied to sewage treatment, 1 soil additional agent, 2 paper manufacturing and textile industries, 3,4 plug thief zone, 5 in high‐salinity environments, 6 managing mine tailings 7 due to the special properties of well water solubility, flocculating, thickening, shearing resistance. HPAM has been extensively used as additives of drilling fluid being injected into the stratum to drive the crude oil.…”