Both compositional and textural maturities of the sandstone are low, whereas such reservoir features as porosity and permeability are generally high.

岩石的成分成熟度和结构成熟度普遍低，而储层物性通常却很好。

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In Kuche area, the sandstone reservoir is characterized by low porosity, low permeability and high pressure, and pore texture is complex, so, it is very difficult for reservoir log evaluation.

库车地区砂岩储层以高压低孔隙度低渗透率为显著特征，且储层结构复杂，给储层测井评价带来很大困难。

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There is an intricate phenomenon that the content of primary water is high in sandstone gas reservoir with low-permeability, but several gas wells can produce water.

低渗透砂岩气藏一般原生水饱和度高，气藏显然没有水层但产水较大，这种现象很难解释。

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