准噶尔盆地滴西地区火山岩爆发相特征及储集性能影响因素  

Characteristics of volcanic explosive facies and factors influencing reservoir performance in Dixi area,Junggar Basin

作　　者：袁丹[1] 郗爱华[1] 刘文[2] 熊益学[1] 周慧[1] 刘豇瑜[3] 

机构地区：[1]西南石油大学资源与环境学院,四川成都610500 [2]中国石油长庆油田公司,陕西西安710054 [3]中国石油塔里木油田公司,新疆库尔勒841000

出　　处：《中国地质》2013年第2期414-422,共9页Geology in China

基　　金：国家重点基础研究发展计划(973)项目(2007CB209507)资助

摘　　要：爆发相火山岩是火山碎屑不同形式的组合体,根据火山碎屑的类型和组合方式可以划分为空落亚相、热基浪亚相、热碎屑流亚相和溅落亚相共4个亚相,每个亚相都有其独特的判别标志。克拉美丽滴西地区爆发相火山岩的岩心、普通薄片、铸体薄片以及测井资料研究发现,该区域岩性复杂,爆发相火山岩主要赋存在滴西10井区和滴西14井区范围内,岩性以火山凝灰岩、火山角砾岩、熔结凝灰岩和熔结火山角砾岩为主。爆发相的储集空间以基质溶孔、粒内溶孔、构造裂缝和溶蚀缝为特征。爆发相各亚相中,以熔结凝灰岩为主的热碎屑流亚相和以火山凝灰岩为主的空落亚相为优质储集体发育部位,主要影响因素为构造作用和流体的溶蚀作用。这项研究为判别其他相似地区爆发相火山岩能否成为有效储层提供参考意义。The explosive facies volcanic rock is a combination of different forms of pyroclastic materials. According to the classifications and the combinations of the pyroclastic materials, the explosive facies can be divided into airfall, thermal base surge, thermal debris flow and splash sub-facies. Each sub-facies has its own unique discrimination criteria. Studies show that the lithology is complex and the explosive facies volcanic rocks are mainly distributed in Dixi 10 and 14 well areas in Kelameili Dixi area, as evidenced by the observation of volcanic rocks core, ordinary thin section and casting thin section as well as the analysis of logging data. The lithology is dominated by volcanic tuff, volcanic breccia, ignimbrite and welded volcanic breccia. The reservoir space of explosive facies is characterized by matrix solution pores, intragranular solution pores, structural fractures and dissolution fissure. The ignimbrite-dominated thermal debris flow sub-facies and volcanic tuff-dominated airfall sub-facies are the high-quality well-developed reservoir sites among all sub-facies. The tectonism and the dissolution of fluid are the main factors for the reservoir. The results of the study wiU provide a reference for the judgement of a volcanic rock reservoir as to whether it is a valuable reservoir or not in the similar area.

关 键 词：火山岩储层 爆发相 石炭系火山岩 克拉美丽气田 准噶尔盆地 

分 类 号：P618.13[天文地球—矿床学]