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火成岩风化壳储集层特征与油气产能关系研究:以准噶尔盆地红山嘴石炭系油藏为例 被引量:2

Characteristics of Igneous Weathering Crust Reservoir and Its Relation With Oil and Gas Productivity:A Case Study of the Carboniferous Hongshanzui Reservoir,Junggar Basin
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摘要 红山嘴油田是准噶尔盆地典型的风化壳型油藏,具有广阔的勘探前景。利用宏微观岩矿分析、地球物理、地球化学等多种实验分析手段,对红山嘴地区火成岩岩石学特征、结构发育特征及控制因素开展综合研究,结果表明:(1)红山嘴地区发育侵入岩、次火山岩、火山熔岩、火山碎屑熔岩、火山碎屑岩和沉火山碎屑岩等6大类火成岩,其中安山岩和凝灰岩最为发育;(2)火成岩储集空间组合包括原生气孔-溶蚀孔-Ⅰ级裂缝型、溶蚀孔-Ⅰ/Ⅱ级裂缝型、Ⅲ级裂缝型和Ⅳ级裂缝型4类,Ⅰ-Ⅳ类储层物性依次变差;(3)风化壳自上而下发育水解带、淋蚀带、崩解Ⅰ带、崩解Ⅱ带、母岩带5个分带,顶部水解带风化强,多被分解成致密的泥土层,可作盖层,而淋蚀带和崩解Ⅰ带是风化淋蚀改造较好区,储层物性最好;(4)不同油气产能井与风化壳结构具有很好的对应关系,可为风化壳型火成岩油藏优势区带划分和产能预测提供指导。 The Hongshanzui oilfield is a typical weathering crust reservoir in the Junggar Basin,and has sub-stantial prospect for exploration.This study uses macro-/micro-lithological and mineral analyses,geophysics,geochemistry and other experimental techniques to comprehensively study the petrological and structural features and controlling factors of igneous rocks at Hongshanzui.The results show that:(1)There are six types of igne-ous rocks at Hongshanzui:intrusive rocks,subvolcanic rocks,volcanic lava,pyroclastic lava,pyroclastic rock and sed-volcanic pyroclastic rock,among which andesite and tuff are the most developed;(2)Reservoir space combination of igneous reservoir includes primary pore-dissolution pore-levelⅠ,dissolution pore-level I/Ⅱ,levelⅡand levelⅣfracture types,with the physical properties deteriorate from levelⅠtoⅣreservoirs;(3)The weathering crust develops a five-layer structure from top to bottom:hydrolysis zone,leached zone,break-down zoneⅠ,break-down zoneⅡand the underlying bedrock.The hydrolysis zone on the top is commonly de-composed into a dense soil layer,which can serve as a cap.Besides,the leached zone and the break-down zoneⅠshow better weathering and leaching transformation,hence the reservoir has the best physical properties;(4)Different oil and gas productivity wells have a good corresponding relationship with the weathering crust struc-ture,which can guide the division of the dominant zone for the weathering crust igneous rock reservoir and the related productivity prediction.
作者 陈俊 王剑 雷海艳 马聪 孟颖 齐婧 CHEN Jun;WANG Jian;LEI Haiyan;MA Cong;MENG Ying;QI Jing(Research Institute of Experiment and Testing,Xinjiang Oifield Company,PetroChina,Karamay,Xinjiang 834000,China;Xinjiang Laboratory of Petroleum Resere in Conglomerate,Karamay,Xinjiang 834000,China)
出处 《现代地质》 CAS CSCD 北大核心 2022年第4期1009-1021,共13页 Geoscience
基金 国家重大科技专项“大型油气田及煤层气开发”(2011ZX05001-005-001)
关键词 红山嘴油田 石炭系 火成岩 风化壳储层 油气产能 Hongshanzui oilfield Carboniferous volcanic weathering crust reservoir productivity
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