川西须家河组储层成岩演化  

Study XuJiaHe reservoir diagenetic process,Sichuan basin.

作　　者：张鼐[1] 田作基[1] 吴胜华[2] 毛光剑[2] 脱奇[1] 刘建宪[1] 

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国地质大学地球科学与资源学院研究生院,北京100083

出　　处：《岩石学报》2008年第9期2179-2184,共6页Acta Petrologica Sinica

基　　金：中国石油勘探开发研究院中青年创新基金资助

摘　　要：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。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 early phase, quartz growth Ⅰ, chlorite film, feldspar and cuttings dissolve, quartz growth Ⅱ, ferreous carbonate sediment successively create. Because of Himalayan movement, there happens faulted and fractured movement in Xujiahe reservoir, fluid goes up into Xujiahe reservoir from deep layer, crevices of sandstone layer filled in quartz vein and carbonate vein. These fractures formed in Himalayan movement are the key factor of remigration into Xujiahe reservoir sandstones.

关 键 词：须家河组 包裹体 拉曼 成岩作用 

分 类 号：P618.130.21[天文地球—矿床学]