准东滴水泉油田八道湾组退积型冲积扇沉积微相识别
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摘要
根据区域地质、地震、测井及岩心分析资料,对位于准噶尔盆地东部山前斜坡区的滴水泉油田滴12井区八道湾组J1b1段的沉积微相进行研究。结果表明:该区J1b1段为冲积扇沉积,划分为扇根、扇中、扇缘3种亚相,可进一步划分为8种微相。岩性与岩相的垂向变化反映目的层是侏罗系最早期的低位域沉积,具有在石炭系背景上填平补齐的特点。J1b1段沉积环境从扇根、扇中往上过渡为扇缘,表明该时期为水进背景下的退积型冲积扇沉积。滴水泉油田八道湾组的冲积扇沉积微相识别,对在准噶尔盆地东部寻找与扇体有关的油气藏具有借鉴意义。
The studied results of regional geology,seismic,logging and core analysis data in the J1b1 sedimentary microfacies of the Badaowan formation in the Di-12 wellblock of Dishuiquan oilfield located in slope area of eastern Junggar basin show that the J1b1 is alluvial fan deposit,which could be further divided into 3 sub-facies of the top fan,middle fan,edge fan and 8 microfacies.The vertical variation of lithology and lithofaceies reflect that the target zone with the backfill characteristic on the Carboniferous is the earliest low-stand system tract of the Jurassic in this study area.The sedimentary environment of the J1b1 is transited from the top,middle fans up to the edge fan,showing such a period is in retrograding alluvial fan deposit under transgression environment.The identification of alluvial fan sedimentation microfacies of the Badaowan formation in Dishuiquan oilfield has a reference to prospecting the reservoirs related with the fans in eastern Junggar basin.
The studied results of regional geology,seismic,logging and core analysis data in the J1b1 sedimentary microfacies of the Badaowan formation in the Di-12 wellblock of Dishuiquan oilfield located in slope area of eastern Junggar basin show that the J1b1 is alluvial fan deposit,which could be further divided into 3 sub-facies of the top fan,middle fan,edge fan and 8 microfacies.The vertical variation of lithology and lithofaceies reflect that the target zone with the backfill characteristic on the Carboniferous is the earliest low-stand system tract of the Jurassic in this study area.The sedimentary environment of the J1b1 is transited from the top,middle fans up to the edge fan,showing such a period is in retrograding alluvial fan deposit under transgression environment.The identification of alluvial fan sedimentation microfacies of the Badaowan formation in Dishuiquan oilfield has a reference to prospecting the reservoirs related with the fans in eastern Junggar basin.
引文
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[2]张纪易.粗碎屑洪积扇的某些特征和微相划分[J].沉积学报,1985,3(3):75-85.
[3]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.
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[5]王仁冲,徐怀民,刘楼军,等.准噶尔盆地滴南凸起水西沟群层序地层特征[J].石油勘探与开发,2009,36(5):601-608.
[6]王濮,刘志峰,李慧莉,等.准噶尔盆地滴南凸起侏罗系层序地层学研究[J].石油天然气学报,2008,30(3):50-56.
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