| 准噶尔盆地西北缘车—拐地区三叠系沉积相特征 |
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| 作者姓名： | 陈奋雄 李军 师志龙 张顺存 |
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| 作者单位： | 核工业二一六大队;新疆油田分公司实验检测研究院;中国科学院油气资源研究重点实验室 |
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| 基金项目： | 国家“973”重点基础研究发展规划项目(2011CB201104) |
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| 摘 要： | 通过岩心观察、薄片鉴定、测井和录井资料分析,以及单井沉积相、剖面沉积相研究,结合研究区的构造背景和沉积环境,分析沉积相特征.结果表明:准噶尔盆地西北缘车—拐地区三叠系主要发育砾岩和砂岩;三叠系的主要物源来自研究区西北角,次要物源来自研究区西部C45井以西.该区百口泉组主要发育冲积扇、扇三角洲沉积,冲积扇由研究区西北部向东南部延伸,克拉玛依组在继承百口泉组沉积特征的基础上,主要发育由西北向东南方向的扇三角洲前缘亚相沉积;白碱滩组在继承克拉玛依组沉积特征的基础上,主要发育扇三角洲前缘亚相及浅湖亚相沉积.三叠系由早期到晚期的水进沉积特征控制了研究区优质储层的分布.
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| 关 键 词： | 准噶尔盆地西北缘 车—拐地区 三叠系 沉积相 冲积扇 扇三角洲 |
The characteristic of triassic sedimentary facies in Che-Guai area of Northwest Margin,Junggar Basin |
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| Authors: | CHEN Fen-xiong LI Jun SHI Zhi-long ZHANG Shun-cun |
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| Institution: | 1.Crew 216,Nuclear Industry,Urumqi,Xinjiang 830011,China;2.Research Institute of Experiment and Detection of Xinjiang Oilfield Company,Karamay,Xinjiang 834000,China;3.Key Laboratory of Petroleum Resources Research,Chinese Academy of Sciences,Lanzhou,Gansu 730000,China) |
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| Abstract: | According to the observation of rock cores,the identification of slices and the analysis of logging,the sedimentary facies of single-well,section and plain,combining the tectonic background and sedimentary environment of this area,we studied the sedimentary characteristics of Triassic in Che-Guai area,northwest margin of Junggar Basin.We found that conglomerate and sandstone mainly develops;the primary provenance is Northwest margin,and the secondary source area is the west area of Well C45.Baikouquan Formation mainly develops alluvial fan and fan-delta deposit,the alluvial fan extends from northwest to southeast.Karamay Formation inherits the sedimentary features of Baikouquan Formation,and mainly develops fan-delta front subfacies extends from northwest to southeast,Baijiantan Formation inherits the sedimentary features of Karamay Formation,and fan-delta front subfacies and shallow lake deposits in chief.From early to late stage,the transgressive sedimentary characteristic of Triassic dominantly controls the distribution of high quality reservoir. |
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| Keywords: | northwest margin of Junggar Basin Che-Guai area Triassic sedimentary facies alluvial fan fan-delta |
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