Synthesis and Mechanism of a Novel Organosilicone Used as a Selective Plugging Agent

Abstract

A novel selective blocking agent called PLA-21 was prepared by acrylamide (AM), Acrylic Acid (AA), diallyldimethylammonium chloride (DMDAAC) and 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) in aqueous solution with organosilicon(WD-70) as cross-linking agent. The optimal synthesis conditions were discussed detailedly. The experimental results showed that its water plugging rate was higher than 95% and plugging rate of oil was less than 10%, which demonstrated excellent selective plugging ability. Meanwhile, cores with different permeability can be blocked effectively. Compared with some common selective blocking agents, it was found that the PLA-21 satisfied engineering demand better and it was an effective selective blocking agent for oil filed application. FTIR and EDS show PLA-21 was synthesized successfully and it contains anion group, cationic groups, nonionic groups and silicon. SEM was used to research and analyze the mechanism of selective plugging. It indicates that PLA-21 can expand sharply in water and shirk in oil, which making it good selective blocking efficiency.

Enhancement of the Wettability and Lubrication of Shale Rock via Nanoemulsions

“…During the emulsion formation process, the water is gradually volatilized or absorbed by the porousness of the surface. Then, the microspheres of the polymer slowly approach and finally contact each other until the polymer particles fuse with each other to form a continuous uniform coating [24]. Figure 5 is the schematic diagram of shale rock soaked in nanoemulsions.…”

Double network hydrogel for tissue engineering

“…Sun et al, ; Taylor & In Het Panhuis, ). Hydrogels have already been applied to treat the damage in retina, ligament, adipose, kidney, muscle, and blood vessels (Ballios, Cooke, van der Kooy, & Shoichet, ; Ding et al, ; Gao et al, ; Gilbert et al, ; Hou, Li, & Luo, ; J. Lee et al, ; Maitz et al, ; Perez, Won, Knowles, & Kim, ; Tan et al, ; Y. J. Wang & Gong, ).…”