| 鄂尔多斯盆地三叠系延长组砂岩的碱性溶蚀作用 |
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| 引用本文： | 田建锋,刘池洋,王桂成,邱欣卫.鄂尔多斯盆地三叠系延长组砂岩的碱性溶蚀作用[J].地球科学,2011,36(1):103-110. |
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| 作者姓名： | 田建锋 刘池洋 王桂成 邱欣卫 |
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| 作者单位： | 1.西北大学大陆动力学国家重点实验室, 陕西西安 710069 |
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| 基金项目： | 国家重点基础研究发展计划“973”项目(No.2003CB214607); 国家自然科学基金项目(No.40372096) |
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| 摘 要： | 为弄清鄂尔多斯盆地延长组砂岩储层孔隙度与富铁绿泥石胶结的关系, 运用铸体薄片、扫描电镜、电子探针等技术分析了砂岩的孔隙特征、岩石组分特征及孔隙与岩石组分的关系, 认为绿泥石包膜对孔隙的保护作用有限, 火山物质(火山灰杂基和火山岩岩屑)的碱性溶蚀是孔隙发育的主要原因, 通过定量计算绿泥石的铁质来源, 认为这种火山物质属于中-基性火山岩, 在早成岩阶段A期7%~11%的中基性火山物质发生碱性溶蚀, 产生了8%的碱性溶蚀粒间孔隙, 同时生成了3%的孔隙衬里绿泥石.绿泥石胶结物的广泛分布只是指示成岩早期发生了大量的火山物质溶蚀并产生了可观的碱性溶蚀孔.
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| 关 键 词： | 碱性溶蚀孔 绿泥石胶结 火山物质 延长组 石油地质 |
| 收稿时间： | 2010-06-10 |
Alkaline Dissolution of Sandstone in the Triassic Yanchang Formation in the Ordos Basin |
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| TIAN Jian-feng,LIU Chi-yang,WANG Gui-cheng,QIU Xin-wei.Alkaline Dissolution of Sandstone in the Triassic Yanchang Formation in the Ordos Basin[J].Earth Science-Journal of China University of Geosciences,2011,36(1):103-110. |
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| Authors: | TIAN Jian-feng LIU Chi-yang WANG Gui-cheng QIU Xin-wei |
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| Institution: | TIAN Jian-feng1,2,3,LIU Chi-yang1,WANG Gui-cheng3,QIU Xin-wei1,2 1.State Key Laboratory of Continental Dynamics,Northwest University,Xi'an 710069,China 2.Institute of Oil and Gas of Northwest University,China 3.College of Oil & Gas Resources,Xi'an Shiyou University,Xi'an 710065,China |
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| Abstract: | In order to figure out the relationship between reservoir porosity and iron-rich chlorite cementation,the pore characteristic,rock constituents and relationship between pore and rock constituents of sandstone were studied by using cast thin sections,scanning electron microscope and electron microprobe techniques. The study reveals that the pore-line chlorite offers limited protection to the porosity,and the greatest contribution to the porosity is alkaline dissolution of volcanic materials. The volcanic mat... |
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| Keywords: | alkaline dissolution chlorite cementation volcanic materials Yanchang Formation petroleum geology |
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