The design and formulation of drilling fluids play a vital role in the success of drilling operations,and therefore the incorporation of calcium carbonate(CaCO3)particles as a novel water-based drilling fluid additive was evaluated.CaCO3 particles were synthesized using a precipitation method and characterized for its morphology,thermal stability properties and component structure.The results showed that the CaCO3 particles exhibited a typical calcite rhombic morphology with a narrow particle size distribution and an average particle size of 2.16 µm.The CaCO3 particles had negative surface charge,and increasing the solution pH produced excess HCO3-and CO32-ions,as well as more negatively surface-charged ions.The FTIR spectrum presented a strong band around 1 431 cm-1,characteristic of the C—O stretching mode of carbonate.The CaCO3 particles exhibited high-temperature stability in the temperature range from 25℃to 600℃.
维普
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