陕西南部海相页岩气与陕西北部陆相页岩气储层特征对比分析
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摘要
利用X射线全岩衍射分析、扫描电镜观察等技术手段,对岩石矿物组份、储集空间类型及储层物性参数分析,陕西南部四川盆地海相页岩气储层脆性矿物含量较高,约占45%—60%,孔隙度较高,渗透条件较差;陕西北部鄂尔多斯盆地陆相页岩气储层粘土矿物含量高,孔隙度低,渗透率较高。
Analysis of rock mineral composition,reservoir space type and physical parameters by X-ray whole rock diffraction,scanning electron microscopy and other technical means has indicated that in the Sichuan Basin in the southern Shaanxi,the content of brittle minerals in marine shale gas reservoirs is relatively high,accounting for about 45-60%,with high porosity and poor permeability;and in Ordos Basin of the northern Shaanxi,continental shale gas reservoir has a high clay mineral content,low porosity and high permeability.
Analysis of rock mineral composition,reservoir space type and physical parameters by X-ray whole rock diffraction,scanning electron microscopy and other technical means has indicated that in the Sichuan Basin in the southern Shaanxi,the content of brittle minerals in marine shale gas reservoirs is relatively high,accounting for about 45-60%,with high porosity and poor permeability;and in Ordos Basin of the northern Shaanxi,continental shale gas reservoir has a high clay mineral content,low porosity and high permeability.
引文
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