| 四川盆地中部三叠系香溪群储层特征及成岩孔隙演化 |
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| 引用本文： | 杨晓萍,邹才能,李伟,陶士振.四川盆地中部三叠系香溪群储层特征及成岩孔隙演化[J].矿物岩石地球化学通报,2006,25(1):55-59. |
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| 作者姓名： | 杨晓萍 邹才能 李伟 陶士振 |
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| 作者单位： | 中国石油勘探开发研究院,北京,100083 |
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| 摘 要： | 四川盆地中部香溪群储层为典型的低渗透油气藏,有效储层分布规律复杂,油气富集规律不清,勘探难度大,勘探效率低。对其储层特征、成岩孔隙演化和有效储层分布规律的研究,对油气勘探具有重要指导意义。研究表明,香溪群储层现处于晚成岩A期,在早成岩早期阶段由于强烈压实作用和硅质胶结作用使大部分细砂岩、中细砂岩储层物性变差,只有粗砂岩和中粗砂岩仍保留部分原生孔隙;在中成岩早期阶段,有机酸性水进入粗砂岩和中粗砂岩中溶蚀其中的长石和岩屑,形成大量次生溶蚀孔隙而形成优质储层。
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| 关 键 词： | 成岩作用 孔隙演化 低渗储层 香溪群 四川盆地 |
| 文章编号： | 1007-2802（2006）01-0055-05 |
| 收稿时间： | 2005-10-20 |
| 修稿时间： | 2005年10月20 |
The Characteristics and The Evolution of the Diagenetic Porosity in the Oil-Gas Reservoir of the Upper Triassic Xiangxi Formation in the Central Sichuan Basin |
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| YANG Xiao-ping,ZOU Cai-neng,LI Wei,TAO Shi-zhen.The Characteristics and The Evolution of the Diagenetic Porosity in the Oil-Gas Reservoir of the Upper Triassic Xiangxi Formation in the Central Sichuan Basin[J].Bulletin of Mineralogy Petrology and Geochemistry,2006,25(1):55-59. |
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| Authors: | YANG Xiao-ping ZOU Cai-neng LI Wei TAO Shi-zhen |
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| Abstract: | The Upper Triassic Xiangxi Formation of the central Sichuan basin is a typical low-permeable oil-gas reservoir.Its distribution regularity is quite complicated and the regularity of oil-gas accumulation in this formation is not understood yet,thus is very difficult for exploring petroleum in the formation of the area.The study on the characteristics and the diagenetic porosity evolution of the reservoir,and the distribution regularity of favorable reservoir will play very important role for the petroleum exploration in the Xiangxi Formation of the central Sichuan basin.The results indicated that the Xiangxi Formation reservoir is currently in a late diagenetic A period.In the early diagenetic stage,the porosity of the fine and medium-sized sandstone was getting poor due to the early dianenetic compression and silica cementation,only part of primary pores were kept in coarse sandstone.In the middle dianenetic stage,the feldspar grains or fragments in the coarse sandstone were dissolved by the organic acid water migrated into the coarse sandstone to form lots of secondary pores,thus the coarse sandstone of the middle diagenetic stage become good oil-gas reservoir. |
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| Keywords: | diagenesis porosity evolution low-permeable reservoir the Xiangxi Formation Sichuan basin |
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