所以在附近就必须具有透水的储存岩石，如砂岩和具孔隙的石灰岩，为石油和天然气提供通道和贮存场所。

And there must be a permeable reservoir rock, such As sandstone or porous limestone, to provide pAssage and storage for the oil and gAs.

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浅埋藏似能保留具白垩状结构的孔隙。

Shallow burial seems to preserve chalky textured porosity.

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安塞地区延长组具低孔隙度、低渗透率的储集特点。

Yangchang Series in Ansai area is characterized by low Porosity and low Permeability.

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