| 苏里格庙地区凝灰质溶蚀作用及其对煤成气储层的影响 |
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| 引用本文： | 张凡芹,王伟锋,王建伟,孙粉锦,刘锐娥.苏里格庙地区凝灰质溶蚀作用及其对煤成气储层的影响[J].吉林大学学报(地球科学版),2006,36(3):365-369. |
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| 作者姓名： | 张凡芹 王伟锋 王建伟 孙粉锦 刘锐娥 |
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| 作者单位： | 1. 中国石油大学 地球资源与信息学院, 山东 东营 257061;2.胜利油田 现河采油厂地质所，山东 东营 257062;3.中国石油勘探开发研究院 廊坊分院, 河北 廊坊 065007 |
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| 摘 要： | 苏里格庙地区二叠系煤成气储层非均质性明显，次生孔隙发育，砂岩中含有大量不稳定凝灰质填隙物。溶蚀模拟实验表明，在酸性水环境中，凝灰质填隙物发生明显溶蚀，并且酸性介质浓度越高溶蚀作用越强烈。在有残余粒间孔隙或裂缝沟通的较开放环境里凝灰质填隙物溶蚀作用强烈；而在较封闭的环境中，溶蚀作用不能充分进行，凝灰质填隙物保存较好。凝灰质填隙物溶蚀产生的次生孔隙，改善了煤成气储层的储集性能；但由于异地胶结作用，又在一定程度上损害了煤成气储层的整体连通性,这是鄂尔多斯盆地二叠系煤成气储层强非均质性和低渗透性的根本原因。
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| 关 键 词： | 苏里格庙地区 煤成气储层 凝灰质填隙物 溶蚀作用 次生孔隙 |
| 文章编号： | 1671-5888(2006)03-0365-05 |
| 收稿时间： | 2005-07-13 |
| 修稿时间： | 2005年7月13日 |
Dissolution of Tuff Filling and Its Effects on the Porosity of the Coal-formed Gas Reservoir in the Suligemiao Area of the Ordos Basin |
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| ZHANG Fan-qin,WANG Wei-feng,WANG Jian-wei,SUN Fen-jin,LIU Rui-e.Dissolution of Tuff Filling and Its Effects on the Porosity of the Coal-formed Gas Reservoir in the Suligemiao Area of the Ordos Basin[J].Journal of Jilin Unviersity:Earth Science Edition,2006,36(3):365-369. |
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| Authors: | ZHANG Fan-qin WANG Wei-feng WANG Jian-wei SUN Fen-jin LIU Rui-e |
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| Institution: | 1.School of Resources and Information, China University of Petroleum, Dongying,Shandong 257061，China;2．Xianhe Oil Production Plant, Shengli Oil Field, Dongying,Shandong 257062，China;3．Langfang Branch, Research Institute of Exploration and Development of China, Langfang,Hebei 065007，China |
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| Abstract: | The Permian coal-formed gas reservoir in the Suligemiao area is characterized by heterogeneity,secondary pore and abundant non-stable tuff fillings.The simulative experiment shows that tuff fillings is obviously dissolved under the acid conditions.And with higher acid concentration,the dissolving ability of tuff fillings is intensive.However,the simulative experiment reflects only the dissolution of tuff fillings under open water environment.But under enclosed burial water environment,because the dissolvable products can not be discharged in time and acid becomes weaker,the dissolution of tuff(fillings) can not be processed fully and tuff fillings is preserved well.The secondary pores induced by dissolution of tuff fillings may improve the storage capacity of reservoir,but they also destroy the interconnection of reservoir to some extent.This is just the reason why the Permian coal-formed gas reservoir under study is heterogeneous and is of very low permeability. |
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| Keywords: | Suligemiao area coal-formed gas reservoir tuff fillings dissolution secondary pore |
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