川西须家河组储层成岩演化

通过对川西须家河组储层砂岩中成岩矿物内流体包裹体均一温度、盐度和组分的分析，结合碳氧同位素、镜质体反射率、粘土矿X-射线衍射等特征，论证了须家河组储层砂岩成岩作用过程。本文认为须家河组随着成岩流体温度的变化以及盐度和有机组分增加，相继发生了早期碳酸盐沉淀（局限于个别夹层），石英一期加大边生成、绿泥石薄膜生成、长石岩屑溶解、石英二期加大边生成、以及含铁碳酸盐的沉淀。由于喜山期区域性构造运动，川西须家河组发生断裂活动，深部流体进入，部分裂缝中沉积了石英和方解石等。喜山期产生的裂缝对须家河组砂岩储层油气的运移起决定性作用，形成了现今次生孔-裂缝型油气藏。

Study XuJiaHe reservoir diagenetic process,Sichuan basin.

Based on analysis of homogenization temperature,saltiness,Raman and components of fluid inclusions,and combining with the characteristics of carbon oxygen isotopic,vitrinite reflectance,X-diffraction of clay mineral,diagenetic process of Xujiahe reservoir sandstone is considered to be in closed system condition before Himalayan orogenic movement and inorganic constituents of diagenetic fluid keep not change.By the increase of the temperature,saltiness and components of diagenetic fluid,carbonate sediment of...