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。
In contrast, connate water is the water trapped in the pores of a rock during its formation, and may be called fossil water.
相反，同生水是在岩石形成期间被圈闭在孔隙中的水，也可称为化石水。
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