| 塔里木盆地寒武系层序界面特征及其油气地质意义 |
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| 引用本文： | 刘家铎,田景春,张翔,许珉,孟万斌,林小兵,杨永剑,李宏伟.塔里木盆地寒武系层序界面特征及其油气地质意义[J].矿物岩石,2009,29(4). |
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| 作者姓名： | 刘家铎 田景春 张翔 许珉 孟万斌 林小兵 杨永剑 李宏伟 |
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| 作者单位： | 1. 油气藏地质及开发工程国家重点实验室(成都理工大学),四川,成都,610059
2. 宁夏地质调查院,宁夏,银川,750021 |
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| 摘 要： | 以塔里木盆地寒武系为研究对象,通过对盆地西北缘柯坪塔格地区、东北缘库鲁克塔格地区及西南缘寒武系野外剖面详细观测及盆内TS1井,YQ6井等钻井岩心详细观察,根据各类测试分析成果,共识别出6种类型的层序界面,它们分别是:①古风化壳.②渣状层,③古喀斯特作用面,④超覆面,⑤岩性、岩相转换面,⑥最大海泛面.在各类层序界面特征详细研究基础上,将上述界面归结为4种成因类型,分别是:造山侵蚀层序不整合界面,隆升侵蚀层序不整合界面,海侵上超层序不整合界面和陆上暴露层序不整合界面.层序界面成因类型不仅反映了海平面升降速度与构造沉降的耦合关系,而且还反映这两者耦合作用之下形成的物质响应和它们两者之间的本质差别,以及形成这些差别的盆地性质及动力学机制.最后,根据层序界面特征及成因意义,详细论述了层序界面的研究意义,具体表现为:(1)反映盆地性质与演化;(2)控制储层的发育,包括控制岩溶储层和白云岩储层的发育;(3)控制油气的运移;层序界面与裂缝、断裂共同组成了沟通孔隙流体流动的输导系统.
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| 关 键 词： | 塔里木盆地 寒武系 层序界面 油气地质意义 |
CHARACTERISTICS AND PETROLEUM GEOLOGIC SIGNIFICANCES OF THE SEQUENCE BOUNDARY SURFACE OF CAMBRIAN STRATA IN TARIM BASIN |
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| LIU Jia-duo,TIAN Jing-chun,ZHANG Xiang,XU Min,MENG Wan-bin,LIN Xiao-bin,YANG Yong-jian,LI Hong-wei.CHARACTERISTICS AND PETROLEUM GEOLOGIC SIGNIFICANCES OF THE SEQUENCE BOUNDARY SURFACE OF CAMBRIAN STRATA IN TARIM BASIN[J].Journal of Mineralogy and Petrology,2009,29(4). |
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| Authors: | LIU Jia-duo TIAN Jing-chun ZHANG Xiang XU Min MENG Wan-bin LIN Xiao-bin YANG Yong-jian LI Hong-wei |
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| Abstract: | Cambrian strata in Kepingtage and Kulukegetage areas of northwest and northeast Tarim and well as logging of TS1 and YQ6 in central basin,have been studied by outcrop investi-gation, geochemical and petrology tests. Six types of sequence boundary surfaces have been recognized:①weathering crust; ② paleosol;③ paleo-karst surface; ④onlap surface ;⑤surface of lithol-ogic and facies transition and ⑥ maximum flooding surface. These surfaces are categorized into four genetic types of unconformity related to orogeny, unconformity related to uplifting, trans-gressive onlap and exposure unconformity respectively. These genetic types reflect the interplay of sea level fluctuation and tectonic subsidence,and the resultant variations in sediment supply. Fi-nally,the significance of characteristics of the sequence boundary surface is analyzed in detail on following aspects:(1) basin configuration and evolution;(2) their controlling effects on reservoir development and (3) their controlling effects on the migration of oil and gas (specifically, se-quence boundary surfaces,fissures and fault formed a conduit system for the migration of oil and gas). This research provide basic and necessary information for further petroleum exploration in Cambrian strata in Tarim Basin. |
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| Keywords: | Tarim basin Cambrian sequence boundary surface petroleum geologic significance |
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