| 川西前陆盆地上三叠统须家河组砂岩成岩作用及孔隙演化 |
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| 引用本文： | 李士祥,胡明毅,李浮萍. 川西前陆盆地上三叠统须家河组砂岩成岩作用及孔隙演化[J]. 天然气地球科学, 2007, 18(4): 535-539. DOI: 10.11764/j.issn.1672-1926.2007.04.535 |
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| 作者姓名： | 李士祥 胡明毅 李浮萍 |
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| 作者单位： | (1.中国石油长庆油田分公司勘探开发研究院，陕西 西安 710021；2.长江大学地球科学学院，湖北 荆州 434023) |
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| 摘 要： | 川西前陆盆地上三叠统须家河组储层主要为一套辫状河三角洲相砂岩，储集岩主要为岩屑石英砂岩、长石岩屑石英砂岩和岩屑长石石英砂岩，经历了压实压溶、胶结、交代、溶蚀和破裂等多种成岩作用，其中压实压溶、胶结作用起主要的破坏作用，溶蚀和破裂作用起主要的建设性作用。目前该区砂岩已达到晚成岩阶段B期，砂岩储层经成岩演化其原生孔隙大部分被破坏，主要以次生孔隙为主，而孔隙演化经历了原生孔隙的破坏、次生孔隙的形成和次生孔隙的破坏3个阶段。
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| 关 键 词： | 成岩作用 孔隙演化 次生孔隙 须家河组 川西前陆盆地 |
| 文章编号： | 1672-1926（2007）04-0535-05 |
| 收稿时间： | 2007-04-16 |
| 修稿时间： | 2007-04-162007-06-08 |
DIAGENESIS AND POROSITY EVOLUTION OF UPPER TRIASSIC XUJIAHE FORMATION SANDSTONE IN WESTERN SICHUAN FORELAND BASIN |
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| LI Shi-xiang,HU Ming-yi,LI Fu-ping. DIAGENESIS AND POROSITY EVOLUTION OF UPPER TRIASSIC XUJIAHE FORMATION SANDSTONE IN WESTERN SICHUAN FORELAND BASIN[J]. Natural Gas Geoscience, 2007, 18(4): 535-539. DOI: 10.11764/j.issn.1672-1926.2007.04.535 |
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| Authors: | LI Shi-xiang HU Ming-yi LI Fu-ping |
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| Affiliation: | (1.Research Institute of Exploration and Development, Changqing Oilfield Company, PetroChina, Xi'an 710021, China;
2.College of Earth Sciences, Yangtze University, Jingzhou 434023, China) |
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| Abstract: | Upper Triassic Xujiahe Formation sandstone is a set of braided river deltaic sediments, which is comprised of lithic quartz sandstone, feldspar lithic quartz sandstone and lithic feldspar quartz sandstone. The sandstone went through compaction, pressolution, cementation, metasomasis, corrosion and fracturing during the diagenesis, and now it is in the late diagenesis stage 13. Most primary pores were destructed after the diagenetic evolution, and the pores are mainly secondary, indicating that the diagenesis is the key factor of controlling the physical properties in this area. Porosity evolution in the rock has experienced the destruction of primary pores and the construction and destruction of secondary pores. Compaction, pressolution and cemetation contribute to destruction, while corrosion and fracturing to construction. |
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| Keywords: | Diagenesis Porosity evolution Secondary porosity Xujiahe Formation Western Sichuan foreland basin. |
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