松辽盆地北部泉四段基准面旋回格架及其对储集物性的控制
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摘要
综合利用岩心、测井和地震资料将松辽盆地北部泉四段划分为1个长期基准面旋回,3个中期基准面旋回和5个短期基准面旋回。结合研究区实钻井储集砂体的孔隙度、渗透率、泥质含量等变化,分析了基准面旋回格架对储集砂体物性的控制作用。长期基准面上升初期,可容纳空间较低,砂体厚度大、连续性好且物性较好;随着基准面的快速上升,可容纳空间急剧上升,储集砂岩厚度较小、连续性差、物性差且泥岩百分含量较高;当长期基准面开始下降,可容纳空间略有下降,储集砂体的沉积环境为堤岸-河道亚相,砂岩百分含量略有上升,但储集物性明显变好。
Through comprehensive study of cores,logging and seismic data,K1q4 Reservoir in northern Songliao Basin was divided into one long-term,3 mid-term and 5 short-term base-level cycles.And then the control of base-level cycle on the reservoir physical property was analyzed in combination with the data analysis of porosity,permeability and mud content of drilled sandbodies.The result shows that at the early stage of base-level rising,the accommodation is less,sandstone accumulates in a big thickness with continuity and good physical property,with the rapid rise of base-level,accommodation increases quickly,the reservoir sandstone becomes thinner and weak continuity,poor physical property,mudstone content is higher;while when the long base-level begins to fall down,accommodation is little smaller,levee-channel sandstone become the main reservoir,and the sandstone content increases with better property.
Through comprehensive study of cores,logging and seismic data,K1q4 Reservoir in northern Songliao Basin was divided into one long-term,3 mid-term and 5 short-term base-level cycles.And then the control of base-level cycle on the reservoir physical property was analyzed in combination with the data analysis of porosity,permeability and mud content of drilled sandbodies.The result shows that at the early stage of base-level rising,the accommodation is less,sandstone accumulates in a big thickness with continuity and good physical property,with the rapid rise of base-level,accommodation increases quickly,the reservoir sandstone becomes thinner and weak continuity,poor physical property,mudstone content is higher;while when the long base-level begins to fall down,accommodation is little smaller,levee-channel sandstone become the main reservoir,and the sandstone content increases with better property.
引文
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[2]刘震,韩军,关强,等.地层岩性圈闭识别和评价的关键问题[J].西安石油大学学报,2007,22(3):31~37.
[3]陈方文,卢双舫,刘海英,等.松辽盆地北部长春岭背斜带油气成藏探讨[J].地质论评,2011,57(2-3):379~386.
[4]赵志魁,江涛,贺君玲.松辽盆地石炭系-二叠系油气勘探前景[J].地质通报,2011,30(2-3):221~227.
[5]谢忱,胡纯心.松辽盆地长岭断陷南部天然气成藏与富集特征[J].石油与天然气地质,2010,31(3):381~385.
[6]Cross T A.Application of high-resolution sequence stratigraphy to reservoir analysis[A].Subsurfaces Reservoir Characterization fromOutcrop Observations Proceedings of the 7th E&P Research Conference[C].Paris:Tecchni,1993.11~33.
[7]邓宏文,王洪亮,李熙喆.层序地层基准面的识别、对比技术及应用[J].石油与天然气地质,1996,17(3):177~184.
[8]郑荣才,彭军,吴朝容.陆相盆地基准面旋回的级次划分[J].沉积学报,2001,19(2):249~255.
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