国家自然科学基金项目（面上项目，重点项目，重大项目）
摘要：鄂尔多斯盆地泥页岩储层纯页岩段粘土矿物含量高，储集空间体积小。因此，粘土矿物转化释放的二氧化硅缺乏足够的空间，不能生长成自生石英，只能以非晶态存在于粘土矿物之间；而其粉砂质泥岩夹层中常见微米级孔洞。孔洞长石溶蚀和粘土矿物转化形成，内部则发育晶形完好的自生石英，绿泥石及含铁方解石。此外，粉砂质泥岩的碎屑颗粒间常发育结块状非晶态二氧化硅，碎屑石英颗粒周围则以次生加大边的形式发育粒状和席状（或片状）非晶态二氧化硅。二氧化硅主要来源于粘土矿物转化与石英碎屑颗粒溶蚀。
Abstract: SiO2 generated in clay mineral transformation cannot develop into authigenic quartz because of narrow space resulting from high clay minerals in pure shale of Ordos basin, and appear among clay minerals in the occurrence of amorphous state. Authigenic quartz with perfect crystal morphology grows in micron-sized pores of silty mudstone interlayers accompanying with chlorite and ferrocalcite. Amorphous silica gathers among detrital minerals in silty mudstone interlayers and arises along quartz particles in the form of granular and sheet silica by secondary enlargement. Clay mineral transformation and quartz dissolution are the sources of silica.
刘国恒,黄志龙,郭小波,刘再振,高潇玉,陈常超,张成林.2016.鄂尔多斯盆地延长组泥页岩储层SiO2赋存状态研究[J].地质学报,90(5):1016-1029.
liuguoheng, huangzhilong, guoxiaobo, liuzaizhen, gaoxiaoyu, chenchangchao, zhangchenglin.2016. The Research of SiO2 Occurrence in Mud Shale Reservoir of the Yanchang Formation in Ordos Basin[J]. Acta Geologica Sinica,90(5):1016-1029.
