泥页岩组构X射线衍射定量分析方法

A QUANTITATIVE DESCRIPTION TECHNIQUE FOR ORIENTATION ANALYSIS OF ARGILLACEOUS ROCK FABRIC BY X RAY DIFFRACTION

泥页岩组构意指构成泥页岩的成分单位（分散颗粒、矿物晶体和胶结物等）的空间定向性。首先详细地论述了利用Ｘ射线衍射仪进行泥页岩组构分析的基本原理和实验方法，而后为便于定量地描述泥页岩的组构特征，引入了“定向度”概念并据此把泥页岩组构分成５种类型。

Argillaceous rock fabric is defined as the orientation (or lack of it) in space of the elements (discrete particle, crystals, cement) of which a argillaceous rock is composed. The basic principle and experimental procedures for orientation analysis of argillaceous rock fabric by X ray diffraction have been described. For quantitative description of the fabric characteristics of argillaceous rock, a ratio or degree of orientation has been introduced, and based on it, the argillaceous rock fabric is classified to five types: preferred, well developed, intermediate, weakly developed and random. The calculation methods for actual samples analysis have been also described in detail, and some actual calculations of samples from Huanghua depression (Dagang oilfield), Bohai Gulf basin are presented in the paper.