摘要
陕甘宁盆地中部气田中区马家沟组五４段白云岩类型多样，文章重点研究了泥微晶白云岩类和粉细晶白云岩类的矿物学和地球化学特征，在此基础上讨论了白云岩的成因，认为泥微晶白云岩为准同生期超咸水白云化成因，粉细晶白云岩为成岩早期混合水白云化成因。并根据白云岩中储集空间类型的分布讨论了各类白云岩的储集性。
There are many different types of dolostones of the fourth sub member of the fifth member of Majiagou Formation in the middle area of the middle part of the gas field of Shaan Gan Ning basin. The article emphatically studies the characteristics of mineralogy and geochemistry of mud micro sized crystalline dolostones and silt fine sized crystalline dolostones. Based on this, the origin of dolostones is researched. Mud micro sized crystalline dolostones are the products of penecontemporaneous dolomitization in the super salt water, while silt fine sized crystalline dolostones are the products of dolomitization of mixing water during early diagenesis. According to the distribution of reservoiring space types of dolostones, the reservoiring performances of the different dolostones are studied.
出处
《成都理工学院学报》
CSCD
1998年第1期87-93,共7页
Journal of Chengdu University of Technology
关键词
马家沟组
白云岩
储集性
岩石成因
气田
盆地
Shaan Gan Ning basin
Majiagou Formation
origin of dolostone
reservoiring performance
