Carbonate could be precipitated as authigenic calcite mineral in the pores in case of that pore has enough HCO 3 - ions since mudstone should be an enclosed system.

泥岩是一种较好的“封闭体系”，当孔隙水中有大量的HCO - 3来源时，其中的碳酸盐沉淀形成自生方解石矿物。

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Passive films on the flow piping of oil and gas are easy to damage by HCO 3 - so as to bring about fail of pipeline and heavy loss.

油气输送管道表面的钝化膜易遭受HCO - 3破坏，从而引起管道报废造成重大损失。

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