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次生加大石英胶结物是砂岩中最丰富的胶结物之一。石英胶结物的时空分布表现在越年轻的地层石英胶结物的含量越少 ,随埋深增加石英胶结物的含量增加 ,而且盆地类型也是控制石英胶结物含量的一个不可忽视的因素。石英胶结物的硅质来源有很多种说法 ,但是区域上可能以某一种或某几种来源为主。影响石英胶结物沉淀的主要因素有温度、流体的 pH值等 ;而关于孔隙流动与硅质搬运和沉淀有三种假说 ,即 :浅部地下水循环说、压实驱动流体高度集中说、扩散和局部流体再循环说。石英胶结物的研究对古温度的定时、了解储层非均质性的成因及储层物性有着重要的意义。
Secondary enlargement Quartz cements are one of the most abundant cements in sandstone. The spatiotemporal distribution of quartz cements shows that the contents of quartz cement in the younger strata are less, the content of quartz cements increases with the depth increasing, and the type of the basins is also a factor that can not be neglected to control the content of quartz cements. Silica sources of quartz cement have many kinds of sources, but the region may be one or more of the main source. The main factors that affect the precipitation of quartz cements include temperature, pH of the fluid, etc. There are three hypotheses about pore flow and siliceous transport and sedimentation: shallow groundwater circulation, the high concentration of compaction driven fluids, the diffusion and local Fluid recycling said. The study of quartz cements has important significance on the timing of palaeopotential temperature, understanding the origin of reservoir heterogeneity and reservoir physical properties.