海拉尔盆地柯绿泥石和钠板石特征及地质意义

柯绿泥石和钠板石为稀有矿物,在储层中并不常见,而两者同时出现则很罕见。通过最近的海拉尔盆地特殊储层样品的扫描电镜和X-衍射试验分析,发现1:1规则混合层矿物柯绿泥石和钠板石同时存在于海拉尔盆地含火山凝灰质蚀变储层或非储层的某些井段中,而且在一定范围内的岩石孔隙中可以大量出现,指出了本区柯绿泥石和钠板石的组合特征,结合该区地层水和微量元素地球化学特征以及重砂特征等研究了柯绿泥石和钠板石的成因矿物学意义和其他石油地质意义。海拉尔盆地柯绿泥石和钠板石在同一储层样品中的共生存在现象是世界范围内的首次发现。

Characteristics and significance of corrensite and allevardite in Hailaer Basin

As rare mineral, corrensite or allevardite is seldom found in the reservoir, and both of them rarely appear simultaneously. Detailed analysis of SEM (scanning electron microscope) and X-diffraction test of special samples from Hailaer Basin shows that corrensite and allevarditc (l:1 clay minerals in mixed layers) can coexist in altered reservoir of tuff or in some intervals of non-reservoir. In addition, oth of them can appear continuously in a large amount within certainscope of rock pore. The combined feature of corrensite and allevardite in this area has been proposed. In combination with formation water, geochemical feature of microelement and heavy sand characteristic, the genetic mineralogy significance of corrensite and allevardite as well as other petroleum geology significance has been studied. The occurrence of coexisting corrensite and allevardite in the same reservoir sample is firstly found and reported in the world.