摘要
以四川某地区页岩气井的页岩段为例,充分利用X射线荧光测量的元素含量及X射线衍射测量的矿物含量,建立了由元素向矿物转化的数学计算方法,可以计算岩石中的7种矿物,包括黏土矿物(高岭石、绿泥石、蒙皂石、伊利石)及石英、长石、方解石常见矿物,矿物含量计算值与实测值对比一致性较好。此外,利用元素的含量,划分了岩石中3种组分泥质、砂质及灰质,并以此利用砂质/(泥质+砂质+灰质)评价了页岩脆性,对于指导页岩的储层改造具有重要的参考价值。
Take the shale section from a shale gas well in Sichuan Basin for instance. The XRF-measured element content and XRD-measured mineral content are used to establish the math calculation method for transformation from elements to minerals. It can calculate seven kinds of mineral in the rock, including clay mineral （kaolinite, chlorite, montmorillonite and illite）, quartzes, feldspar and calcite. The calculated value of mineral content is compatible with the actually-calculated value. In addition, the content of elements is used to divide three components of the rock - muddy, sandy and ashy matters. Use of sandy/（muddy ＋ sandy ＋ ashy） matter appraisal of brittleness of shale is of great reference to implement transformation of shale reservoir.
出处
《中国石油勘探》
CAS
2014年第2期85-90,共6页
China Petroleum Exploration
