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低渗透储层的形成过程和原因复杂,其形成条件既有同沉积的物质条件,也有沉积后的因素作用。从同沉积的物质条件来看,对于近源沉积来说,往往颗粒混杂分选差,沉积物成熟度低,而对于远源沉积来说,沉积物粒度细,泥质含量高,这些因素都有可能造成储层物性差;从沉积后的物质条件来说,成岩作用的改造是最常见的因素。
The formation process and the reason of the formation of low permeability reservoirs are complicated. The forming conditions of the reservoirs are not only the same depositional material conditions but also the depositional factors. From the same sedimentary material conditions, near-source sedimentation, often mixed poor particle sorting, sediment low maturity, and far-source sediment, the sediment fine grain size, high clay content, these factors are It is possible that the properties of the reservoir are poor. From the sedimentary material conditions, the remodeling of diagenesis is the most common factor.