石英次生加大以及伴生的自生粘土矿物是影响储层性质的重要因素。石英次生加大是受温度控制的成岩矿物,随着温度的升高,石英次生加大的含量也随之增加,导致孔隙度的降低。钾长石和高岭石在温度>90℃反应形成的伊利石,造成了储层渗透率的降低。本文通过对石英次生加大产出特征和流体包裹体温度的研究,进而讨论川西香溪群致密砂岩储层的成因。 Quartz secondary growth and accompanying authigenic clay minerals are important factors affecting reservoir properties. Quartz secondary growth is controlled by the temperature of diagenetic minerals, with the increase of temperature, quartz secondary increased content also increases, resulting in reduced porosity. Formation of illite by the reaction of potassium feldspar and kaolinite at temperatures> 90 ° C resulted in a decrease in reservoir permeability. In this paper, the output characteristics of quartz secondary enrichment and fluid inclusions temperature research, and then discuss the Xiangxi Group of tight sandstone reservoirs in the genesis.