摘要
下第三系沙河街组第三段(E_(s3))长石砂岩经历了强烈的成岩作用,己进入晚成岩C的早期阶段。本文系统地研究了沙三段长石砂岩的成岩作用,各种自生矿物对储层孔隙性的控制,并探讨了阶状石榴石的自生成因,及各种自生矿物的形成温度与碎屑成岩演化的联系,描绘出该区成岩作用的时空分布特征,并认为储层孔渗质量与其中自生粘土的发育程度大体呈正相关关系。
The feldspathic sandstone in Sha 3 member of Eogene system (Es3)has experienced strong diagenesis and entered the early stage of late diagenetic C. The diagenesis of sandstone in Es3, especially the control of various authigenic minerals over physical properties of the reservoirs has been studied in detail in this paper. The porosity-permeability of the reservoirs is largely proportional to the development of authigenic minerals inside them. The authigenic origin of step-like garnet has been approached, the connection between the formative temperature of various authigenic minerals and the elastic diagenesis has been discussed, and the distribution feature of time and space of diagenesis in the area has also been described.
出处
《西南石油学院学报》
CSCD
1991年第4期9-20,共12页
Journal of Southwest Petroleum Institute
关键词
砂岩
储集层
第三纪
成岩作用
Sandstone
Reservoir
Diagenesis
Diagenesis evolution
The Quaternary period
Shahejie group
Raoyang depression
