An energy storage microsphere, prepared by encapsulating phase change materials in high-strength hollow microsphere, was proposed in this paper. The research objective was designed to utilise energy storage microspheres (ESM) in the cement mixture to achieve low hydration exothermic, without negatively affecting other properties. In this study, ESM were prepared and the difference between sealed and unsealed ESM was analysed. Further, the hydration exothermic of the cement, with sealed ESM, was tested and the influence of sealed ESM on the strength and other basic properties of the cement were evaluated. Results showed that resin sealed the ESM. Under 20 °C curing, sealed ESM were found to reduce the heat released during cement hydration process and improve the rheological properties of the cement slurry. The sealed ESM were observed to have no negative impact on strength and the basic properties, such as density, settlement stability, and rheology, of the cement for amount less than 20%. The scanning electron microscope results showed that the interface between sealed ESM and the cement matrix was stable. This novel material made the oil-well cement applicable for natural gas hydrate cementing in deep water.

提出了将相变材料包裹在高强度空心微球中制备的储能微球。该研究目标旨在利用水泥混合物中的储能微球（ESM）来实现低水化放热，而不会负面影响其他性能。在本研究中，制备了ESM，并分析了密封和未密封的ESM之间的差异。此外，测试了具有密封的ESM的水泥的水合作用放热，并评估了密封的ESM对水泥的强度和其他基本性能的影响。结果表明，树脂密封了ESM。在20°C养护下，发现密封的ESM可以减少水泥水化过程中释放的热量并改善水泥浆的流变性。观察到密封的ESM对水泥的强度和基本性能（如密度，沉降稳定性和流变性）的影响小于20％时，不会产生负面影响。扫描电子显微镜结果表明，密封的ESM与水泥基体之间的界面稳定。这种新型材料使油井水泥适用于深水天然气水合物固井。