[This article belongs to Volume - 47, Issue - 02]

Preparation and evaluation of epoxy resin phase change proppants based on Pickering emulsification technique

Conventional solid proppant generally has shortcomings such as poor migration ability and easy clogging of cracks due to rigid structure. It can be injected in liquid phase Proppants have become the main development direction. A phase change proppant was developed based on an emulsified thermosetting resin system and evaluated. The phase change proppant system is based on bisphenol A type epoxy resin, using diethylene triamine and butyl The adduct of glycidyl ether is used as the curing agent, and SiO2 solid particles with 1% of the resin mass are used as the emulsifier. Then hollow glass microspheres with 1.25% of the resin mass and absolute ethanol with 25% of the resin mass are added respectively to reduce the resin density and Dilute the resin. Through process optimization, proppant particles with particle sizes of 4.5, 3, 2~2.5, 2, 1 and 0.5 mm were obtained. The obtained proppant was evaluated and the results showed that due to the low density and high strength of the material, the proppant particles The migration ability and conductivity of the agent can fully meet the production needs of unconventional reservoirs with high closing pressure.