Received date: 2015-04-28
Revised date: 2015-05-22
Online published: 2015-09-10
X-ray diffraction is a basic method for determination of shale mineral composition, quantitative accuracy by diffraction by mineral composition,particle size,the diffraction peaks overlap,and other factors.Choose well QQ1# drilling wells hole samples in Sichuan Basin shale mineral components determined,by comparison with two kinds of experimental results,find out the methods of improving the precision for quantitative shale mineral components.Method 1: Whole rock direct determination and quantitative XRD;Method 2: The phase after dissolving stokes gravity separation of different graded mineral XRD measurement and quantitative respectively.Results showed that through two experimental methods have a greater difference between the percentage of carbonate minerals,directly reflects the XRD quantitative methods in the content of mineral component is not fully trusted.The phase after dissolving and gravity separation XRD test can largely improve the test precision and shale in the mineral content of different granularity of shale diagenesis and shale properties than the single mineral content has more practical significance.
Key words: Mineral composition in shale; XRD; Quantitative analysis; Sichuan Basin
LIU Yu-xiang,WANG Kai-liang,HU Pei-qing,LI Wan-mao . A Discussion on Measuring Methods of Shale Mineral Components[J]. Natural Gas Geoscience, 2015 , 26(9) : 1737 -1743 . DOI: 10.11764/j.issn.1672-1926.2015.09.1737
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