| 鄂尔多斯盆地上古生界层序格架内的成岩作用 |
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| 引用本文： | 李熙喆,张满郎,谢武仁,季汉成.鄂尔多斯盆地上古生界层序格架内的成岩作用[J].沉积学报,2007,25(6):923-933. |
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| 作者姓名： | 李熙喆 张满郎 谢武仁 季汉成 |
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| 作者单位： | 中国石油勘探开发研究院廊坊分院 河北廊坊 065007 |
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| 基金项目： | 国家十五科技攻关项目资助 |
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| 摘 要： | 鄂尔多斯盆地上古生界主要发育石英砂岩、岩屑砂岩、杂砂岩、“牛毛毡砂岩”、黑色石英砂岩等五种砂岩类型。这些砂岩具有成份成熟度较高、结构成熟度中—低、以正粒序为主、粒级普遍为中粗粒、储层填隙物类型多、含量变化大的特点。经历了三个重要成岩阶段:早成岩压实期—原生孔隙大量破坏损失期，中成岩A期—有机酸溶蚀—次生孔隙发育期，中成岩B期—埋藏压溶再胶结成岩期。在SQ8主要发育压溶、高岭石溶蚀、石英次生加大等成岩作用。SQ11主要发育硅质胶结、碳酸盐胶结成岩作用。成岩相可分为三级五类，即Ⅰ强压溶—石英加大相；Ⅱ压溶—碳酸盐溶蚀—高岭石交代相及溶蚀—弱杂基充填—高岭石交代相；Ⅲ强压实—粘土胶结相及强压实—碳酸盐胶结、交代相。区内储层整体为低孔低渗的致密砂岩储层，以发育次生孔隙为主，包括粒间溶孔、粒内溶孔和高岭石晶间孔，原生孔隙较少保留。通过对沉积砂体展布、储层成岩相类型及储集性能的综合分析，对有利的储层分布区带进行了预测。
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| 关 键 词： | 岩石类型 成岩阶段 成岩相 储层预测 |
| 文章编号： | 1000-0550（2007）06-0923-11 |
| 收稿时间： | 2007-02-07 |
| 修稿时间： | 2007-06-06 |
The Diagenesis in Sequence Stratigraphic Framework of the Upper Paleozoic, Ordos Basin |
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| LI Xi-zhe,ZHANG Man-lang,XIE Wu-ren,JI Han-cheng.The Diagenesis in Sequence Stratigraphic Framework of the Upper Paleozoic, Ordos Basin[J].Acta Sedimentologica Sinica,2007,25(6):923-933. |
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| Authors: | LI Xi-zhe ZHANG Man-lang XIE Wu-ren JI Han-cheng |
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| Institution: | Langfang Branch of Research Institute of Petroleum Exploration and Development, Langfang Hebei 065007 |
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| Abstract: | In the Ordos Basin,the Upper Paleozoic could be divided 5 types of sandstone,mainly including quartz sandstone,lithic sandstone,graywacke,"felty" sandstone,black quartz sandstone,etc.These types of sandstone have some characteristics as that the compositional maturity of the sandstone are relatively high;the textural of the sandstone are relatively medium to low;normal grading;grain size is Coarse and Medium Grains,tuff fillings in the reservoir have multitype,and their concentrations vary greatly.The reservoir experienced three important diagenesis phases that early compaction phase-seriously damaged and losing primary pore phase,intermediate diagenetic A phase-oganic acids corrosion-Secondary Porosity development phase,intermediate diagenetic B phase-burial,pressolution and secondary cementation diagenesis phases.The main diagenesis of SQ8 are pressure solution,kaolinite corrosion and quartz overgrouth, et al.The ones of SQ11 are siliceous cementation and carbonate cementation. The diagenetic facies are divided into three grades and five types: the first is strong pressure solution-quartz overgrouth facies;the second is pressure solution-carbonate corrosion-kaolinite metasomatic facies and corrosion-weak matrix filled-kaolinite metasomatic facies;the third is strong compaction-clay cemented facies and strong compaction-carbonate cemented,metasomatic facies.The main reservoir of studying region is low porosity,low peremeability sandstone,and mostly develops secondary pores,which include intergranular corrosion pores,and kaolinite intercrystal pores.few primary pores were preserved.Through multidisciplinary analysis of sand body distribution,reservoir diagenetic facies types and reservoir property,to predict the favorable reservoir distribution zone. |
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| Keywords: | rock type diagenetic stage diagenetic facies reservoir predication |
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