| 川西坳陷大邑构造上三叠统须家河组储层成岩效应研究 |
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| 引用本文： | 刘娜,牛中宁.川西坳陷大邑构造上三叠统须家河组储层成岩效应研究[J].四川地质学报,2011,31(1):20-24. |
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| 作者姓名： | 刘娜 牛中宁 |
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| 作者单位： | 1. 中石油东方地球物理公司研究院长庆分院,西安,710021
2. 中石油东方地球物理公司,河北涿州,072751 |
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| 摘 要： | 川西坳陷大邑构造上三叠统须家河组是天然气的重点勘探层位.大量的薄片观察和鉴定发现,储层原始孔隙已破坏殆尽,以各类次生孔隙为主.该区须家河组经历了多种成岩变化,其中以压实作用和各种胶结充填作用表现较为强烈,而溶蚀作用相对较弱,对储量孔隙度的影响非常大.目前该区砂岩已达到中成岩阶段B期,岩屑石英砂岩、长石岩屑石英砂岩与岩屑砂岩(富岩屑砂岩)在不同程度上制约着成岩作用的发生和发展,进而影响孔隙度演化.
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| 关 键 词： | 须家河组 成岩作用 孔隙演化 川西坳陷 |
Study of Diagenetic Effect of Reservoir of the Upper Triassic Xujiahe Formation in the Dayi Structure, West Sichuan Depression |
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| LIU Na,NIU Zhong-ning.Study of Diagenetic Effect of Reservoir of the Upper Triassic Xujiahe Formation in the Dayi Structure, West Sichuan Depression[J].Acta Geologica Sichuan,2011,31(1):20-24. |
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| Authors: | LIU Na NIU Zhong-ning |
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| Institution: | LIU Na1 NIU Zhong-ning2(1-Cjangqing Institute,Bureau of Geophysical Prospecting,CNPC,2-Bureau of Geophysical Prospecting,Zhuozhou,Hebei 072751) |
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| Abstract: | Rock thin section study indicates that priMar.y pore in the reservoir of the Upper Triassic Xujiahe Formation in the Dayi structure,west Sichuan depression has been completely destroyed.The Xujiahe Formation here was subjected to various diagenetic processes compaction and cementation in which predominated over dissolution.At present the sandstone in this region is in middle diagenetic stage.The diagenesis is restricted by lithic quartzose sandstone,lithic feldspathic quartzose sandstone and lithic sandston... |
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| Keywords: | Xujiahe Formation diagenesis evolution of porosity west Sichuan depression |
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