鄯勒油田西山窑组2段沉积微相研究
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摘要
确定鄯勒地区主力储层西山窑组2段沉积微相展布特征,为后期精细油藏描述提供地质依据.在岩石矿物、沉积构造、粒度分析和地震相研究基础上,对研究区砂体形成水动力条件及沉积环境进行分析,确定该区西2段为三角洲沉积体系,主要沉积微相包括三角洲平原分流河道、沼泽、分流间湾和决口扇,分流河道和决口扇微相构成本区骨架砂体.据单井沉积微相和小层砂体形态对比分析,对小层沉积微相进行研究,掌握了该区西2段内沉积微相的时空展布和变化规律.
Confirming the sedimentary microfacies of the second section sandstones of Xishanyao formation in Shanle Oilfield can offer foundation for later reservoir fine description.The hydrodynamic conditions and the depositional environment of the study area were analyzed based on the analysis of rock minerals,sedimentary structure,grain size and seismic facies.The second section sandstones of Xishanyao formation in this area are delta sandstones.The main sedimentary microfacies include distributary channel of deltaic plain,swamps,interdistributary and crevasse splay,in which the distributary channel and crevasse splay facies formed the skeleton sand bodies in this area.According to the single well microfacies and subzone sand body morphology comparative analysis,studied the subzone sedimentary microfacies of the second section sandstones of Xishanyao formation,and mastered the law of distribution and time-space changes of the sedimentary microfacies in the study area.
Confirming the sedimentary microfacies of the second section sandstones of Xishanyao formation in Shanle Oilfield can offer foundation for later reservoir fine description.The hydrodynamic conditions and the depositional environment of the study area were analyzed based on the analysis of rock minerals,sedimentary structure,grain size and seismic facies.The second section sandstones of Xishanyao formation in this area are delta sandstones.The main sedimentary microfacies include distributary channel of deltaic plain,swamps,interdistributary and crevasse splay,in which the distributary channel and crevasse splay facies formed the skeleton sand bodies in this area.According to the single well microfacies and subzone sand body morphology comparative analysis,studied the subzone sedimentary microfacies of the second section sandstones of Xishanyao formation,and mastered the law of distribution and time-space changes of the sedimentary microfacies in the study area.
引文
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[2]李琦,田景春,何建军,等.埕东油田北坡馆陶组河流相砂岩沉积微相研究[J].矿物岩石,1998,18(增刊):176-177.
[3]罗洋,李德敏,蒋庆平,等.准噶尔盆地中S区西山窑组沉积微相与油气勘探[J].新疆地质,2007,25(4):409-412.
[4]戴启德,国景星,狄明信.孤岛油田中二中区馆陶组上段第三砂层组沉积微相研究[J].石油大学学报,1998,22(3):31-34.
[5]陈程,孙义梅,邓宏文.油田开发后期扇三角洲前缘微相分析及应用[J].现代地质,2001,15(1):88-93.
[6]金龙,丁晓琪.鄂尔多斯盆地镇泾油田长8段沉积相研究[J].新疆地质,2009,27(2):160-163.
[7]姜在兴.沉积学[M].北京:石油工业出版社,2003.
[8]赵澄林,朱筱敏.沉积岩石学[M].北京:石油工业出版社,2001.
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