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准噶尔盆地西缘车排子凸起石炭系火山岩储层成因
孟凡超1,2,操应长1,崔岩3,许涛4,刘子超4,王艳忠1
(1.中国石油大学地球科学与技术学院,山东青岛 266580;2.海洋国家实验室海洋矿产资源评价与探测技术功能实验室,山东青岛 266071;3.山东科技大学地球科学与工程学院,山东青岛 266590;4.中国石化胜利油田公司勘探开发研究院西部分院,山东东营 257000)
摘要:
通过岩心观察、薄片鉴定、元素测试、物性分析等技术手段,对准噶尔西缘车排子凸起石炭系火山岩岩性、岩相、储集空间类型、物性特征及储层成因进行详细研究。结果表明:石炭系火山岩以玄武岩、安山岩、玄武安山岩等火山熔岩和中基性火山角砾岩、凝灰岩等火山碎屑岩为主;火山岩储层储集空间主要为次生溶蚀孔隙和裂缝,属于低孔-特低渗储层;石炭系火山岩储层的形成经历了复杂的演化过程,火山岩先后经历了冷凝固结、构造抬升、表生风化淋滤、埋藏流体充填、溶蚀等后期改造作用;火山岩储集性能呈现先提高后降低再提高的演化过程。
关键词:  准噶尔盆地  车排子凸起  石炭系  火山岩储层  储层演化
DOI:10.3969/j.issn.1673-5005.2016.05.003
分类号::TE 122.2
文献标识码:A
基金项目:中央高校基本科研业务费专项(15CX05007A,15CX08001A);国家自然科学基金项目(41302102);山东省自然科学基金项目(ZR2012DL10)
Genesis of Carboniferous volcanic reservoirs in Chepaizi salient in western margin of Junggar Basin
MENG Fanchao1,2, CAO Yingchang1, CUI Yan3, XU Tao4, LIU Zichao4,WANG Yanzhong1
(1.School of Geosciences in China University of Petroleum, Qingdao 266580, China;2.Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China;3.College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China;4.Western Branch, Institute of Exploration and Development, Shengli Oilfield, Dongying 257000, China)
Abstract:
Carboniferous volcanic rock is an important reservoir type in Chepaizi salient, western margin of Junggar Basin. Based on the results of core observation, thin section identification, element test and physical property analysis, this study analyzed the lithology, lithofacies, reservoir space types, physical property and genesis of the Carboniferous volcanic rocks. The results reveal that Carboniferous volcanic rocks are dominated by volcanic lava (including basalt, andesite, and basaltic andesite) and pyroclastic rocks (including intermediate-basic volcanic breccias and tuff).The volcanic rocks are low porosity and ultra-low permeability reservoirs, with main reservoir space of secondary dissolved pore and fracture. The Carboniferous volcanic rocks have undergone intense reformation at late stage, including condensation consolidation, tectonic uplifting, weathering leaching, and cavity filling and dissolution. The quality of volcanic reservoirs is changed accordingly:first improved by tectonic uplifting or weathering leaching, then deteriorated by cavity filling, and finally improved by dissolution.
Key words:  Junggar Basin  Chepaizi salient  Carboniferous  volcanic reservoirs  reservoirs evolution
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