Due to the variation of geologic environment reservoir is often invaded by external water, thus, resulting in the property difference between connate water and formation water.
油藏形成后，由于地质环境变化，储层往往会受到外部水系的侵入，从而造成原生水和水层地层水性质的差异。
The results showed that the density variation induced by double-diffusive convection is significant to the formation and evolution of A-segregates.
结果表明，糊状区中由于热溶质双扩散对流造成的密度变化是形成A偏析的根本原因。
The formation process, dynamic variation, deciduous causes of oxide film of work roll are analyzed, and the control methods have been put forward.
分析了氧化膜的形成过程、动态变化及脱落原因，并提出了控制方法和措施。
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