Phase-change encapsulated microsphere, early-strength low-hydration-heat cement system and application of phase-change encapsulated microsphere and early-strength low-hydration-heat cement system

The invention discloses a phase change packaging microsphere which comprises a core material carrier, an alkane material and epoxy resin, the alkane material is distributed in the core material carrier, and the epoxy resin is coated on the surface of the core material carrier; wherein the alkane material comprises tetradecane, pentadecane and paraffin. The phase change packaging microsphere has good heat storage performance, can obviously reduce the hydration heat of cement when being applied to a cement system, and can meet the requirements of well cementation under a low-temperature condition. 本发明公开了一种相变封装微球，包括芯材载体、烷烃材料和环氧树脂；所述烷烃材料分布在所述芯材载体内部，所述环氧树脂包覆于所述芯材载体表面；其中，烷烃材料包括十四烷、十五烷和石蜡。本发明的相变封装微球具有良好的储热性能，应用于水泥体系中能够显著降低水泥水化热，能够满足低温条件下固井的需求。