百口泉油田百21井区夏一段冲积扇储层沉积微相分析
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摘要
在岩心观察的基础上,综合运用地质、测井和地震资料,从单井相分析入手,通过连井对比将剖面扩大到全区范围,详细研究了百21井区夏一段储层的沉积微相类型,重点分析了主要含油层的沉积微相平面展布特征。研究认为:该区二叠系夏一段属冲积扇扇中和扇缘亚相沉积,主要微相类型是扇中的辫状水道和漫溢砂;夏一段冲积扇扇体具有东西2个扇叶的特点。其中,西部扇叶与东部扇叶相比,规模大、延伸远、辫状水道和漫溢广泛发育,局部发育扇中泥石流。
The reservoirs in the first member of the Xiazijie formation in the Bai-21 well block of the Baikouquan oilfield in the Junggar Basin are studied in detail for sedimentary microfacies in terms of types and plane distribution based on core observation by using geological,well logging and seismic data,starting with single well facies analysis,and extending cross-well correlation section to the entire region.The results show that the first member of the Permian Xiazijie formation belongs to middle and marginal fan subfacies of alluvial fan deposit,with braided channel and overbank sand as the major microfacies;the alluvial fan in the first member of the Xiazijie formation has two lobes on the west and east.Compared to the eastern lobe,the western lobe is larger,farther extended,had extensively developed braided channel and overbank deposits,locally developed middle fan debris flow.
The reservoirs in the first member of the Xiazijie formation in the Bai-21 well block of the Baikouquan oilfield in the Junggar Basin are studied in detail for sedimentary microfacies in terms of types and plane distribution based on core observation by using geological,well logging and seismic data,starting with single well facies analysis,and extending cross-well correlation section to the entire region.The results show that the first member of the Permian Xiazijie formation belongs to middle and marginal fan subfacies of alluvial fan deposit,with braided channel and overbank sand as the major microfacies;the alluvial fan in the first member of the Xiazijie formation has two lobes on the west and east.Compared to the eastern lobe,the western lobe is larger,farther extended,had extensively developed braided channel and overbank deposits,locally developed middle fan debris flow.
引文
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[3]吴胜和,伊振林,许长福,等.新疆克拉玛依油田六中区三叠系克下组冲积扇高频基准面旋回与砂体分布型式研究[J].高校地质学报,2008,14(2):157-163.
[4]孙靖,金振奎,王春生.准噶尔盆地西北缘八二区三叠系克下组沉积相研究[J].新疆地质,2008,26(4):373-376.
[5]张纪易.克拉玛依洪积扇粗碎屑储集体[J].新疆石油地质,1980,1(1):33-53.
[6]王志坤,王多云,郑希民,等.陕甘宁盆地陇东地区三叠系延长统长6—长8储层沉积特征及物性分析[J].天然气地球科学,2003,14(5):380-385.
[7]曹宏,姚逢昌,宋新民,等.小拐油田夏子街组冲积扇沉积微相[J].石油与天然气地质,1999,20(1):62-65.
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[9]Reading H G.Sedimentary Environments:Processes,Faci-es and Stratigraphy[M].Blackwell Scientific Publication,1996:37-82.
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