... , construction Itroduction1. application;fly ash cenospheres is used in the oil field cementing, to reduce cement costs and improve the life ... weight, nontoxic, tasteless,corrosion resistant, high temperature, pressure, insulation, small thermal conductivity, excellent performance. Physical Analysis DataChemical Analysis Data AppearanceGrey/White ... -1750c K2O 0.5-1.1% cenospheres fly ash in oil well