2013年3月，第19卷，第1期，46-55页 March 2013，Vol.19，No.1，p.4655
高校地质学报
Geological Journal of China Universities
准噶尔盆地西北缘下二叠统
火山岩岩性、岩相及其与储层的关系
鲜本忠2，牛花朋12，朱筱敏2，董国栋，朱世发"2，安思奇
1.中国石油大学（北京）油气资源与探测国家重点实验室，北京102249
2.中国石油大学（北京）地球科学学院，北京102249
摘要：与石炭系相比，准噶尔盆地西北缘下二叠统火山岩岩性、岩相类型丰富，研究程度低。本文利用岩心、薄片及元素地球化学资料，开展了火山岩岩石学及其与储层关系研究。佳木河组以熔岩和火山碎屑岩共同发育为待征，岩性以玄武安山岩、安山岩、英安岩为主，相对稳定；风城组火山岩在不同地区变化明显，克百地区以火山熔岩为主，属于玄武粗安岩和碱玄岩，而乌夏地区以熔结火山碎屑岩或火山碎屑熔岩发育为特征，属于流纹岩、碱玄质响岩和粗安岩。在佳木河组及克百地区风城组，（沉）火山角砾岩储层质量最好，安山岩等熔岩其次；乌夏地区风城组熔结火山角砾岩和石泡构造火山角砾熔岩储层质量最好。此外，相同岩性可能因产出环境不同面储层特征有别。尽管各地成岩作用存在差异，但火山岩优质
木河组溢流相和爆发相共同发育，而克百地区风城组以溢流相为主、乌夏地区风城组以爆发相火山碎屑流亚相为主，不同地区不同层位的有利勘探目标差异明显。除断裂带的裂缝和大型不整合面之下的风化淋滤外，岩相是控制火山岩储层质量的关键因素。
关键词：火山岩；岩相；储层；下二叠统；准噶尔盆地西北缘
中图分类号：P588.14
文献标识码：A
文章编号：1006-7493（2013)01-0046-10
EarlyPermianVolcanicLithology,LithofaciesandTheirRelationstoReservoir
in Northwestern Margin of the Junggar Basin
ooae
1. State Key Laboratory of Petroleum Resource and Prospecting (China University of Petroleum, Beijing ), Beijing 102249, Chian;
2. College of Geosciences, China University of Petroleum ( Beijing) , Beijing 102249, Chian
Abstract: Early Permian volcanic rocks in northwestern margin of the Junggar Basin have different rock types and lithofacies In this paper, data from core, thin sections and element chemistry were used to study volcanic lithology and their relations to reservoir quality. The Jiamuhe Formation is characterized by lava and volcanoclastic rocks, which are mainly basaltic andesites, andesites and quartz andesites, The lithology of volcanic rocks in the Fengcheng Formation are different in different areas, Lava including basaltic andesitoid and tephrite was the main type in Kebai area, while welded pyroclastic rock and volcaniclastic lava eaaa adaroasa eeensee sae e aoo and lava such as andesite in the Jiamuhe Formation and in the Fengcheng Formation of the Kebai area, and in welded pyroclastic rock and breccias lava with stone bubbles in the Fengcheng Formation of the Wuxia area. Besides, same volcanic rock would have different reservoir quality because of different volcanic environments, In the studied area, although diagenesis was diverse
收稿日期：20120405；修回日期：20120927
基金项目：国家自然科学基金项目（41172104，41202078）；国家油气重大专项（2011ZX05009-002，2011ZX05014-001）；中国石油大学
（北京）科研基金（KYJ2012-01-06）联合资助
作者简介：鲜本患，1973年生，男，博士，酬教授，主要从事沉流积学、层序地层学研究；E-mail:xianhzh@163.com