Temporary plugging agent and preparation method thereof

• Main Authors: BAI YINGRUI, SHANG XIAOSEN, WANG ZENGBAO, CHEN JUNZE, ZHAO XIUTAI, JI YUAN, HE HAIFENG, ZHAO MENGYUN, CHEN ANSHENG, SONG LIYANG, LI XUEPENG
• Format: Patent
• Language: Chinese; English
• Published: 29.05.2018
• Subjects: ADHESIVES; CHEMISTRY; DYES; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; POLISHES

The invention relates to the field of temporary plugging agents for petroleum reservoir exploitation, in particular to a temporary plugging agent and a preparation method thereof. The temporary plugging agent adopts the structure that an organic resin layer and a flexible gel layer are sequentially arranged at the outer part of a lipophilic solid phase organic acid particle, wherein the flexible gel layer is formed by crosslinking acrylic amide, an organic crosslinker and an initiator. A preparation method of the temporary plugging agent comprises the following steps: performing surface treatment through an ethanol diluted oil soluble dispersion treating agent, so as to obtain the lipophilic solid phase organic acid particle; mixing the lipophilic solid phase organic acid particle and an oil soluble surface coating agent A in a ratio, then performing primary coating treatment, performing intermediate-temperate standing, and then performing drying treatment, so as to obtain a surface coating temporary plugging