安岳—潼南地区须家河组地震相模式及其地质意义
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摘要
应用地震地层学理论和方法,结合露头和钻井资料,通过合成地震记录进行层位标定,将安岳—潼南地区须家河组划分为4个三级层序。建立了丘状和上超充填2种地震相模式。根据地震反射单元内部结构、外部形态、反射波终止类型、频率、振幅、连续性和层速度等多项地震参数,识别出平行—亚平行、丘状、充填、前积等5个大类地震相和亚平行波状变振幅低连续、上超充填等8个亚类地震相。利用过井地震剖面建立地震相与沉积相、测井相对应关系,分析地震相地质意义,预测了有利储集相带的分布。
Based on the theory and method of seismic stratigraphy in combination with synthetic seismogram calibration,Xujiahe Formation is divided into four third-order seismic sequences.Two primary seismic facies models(onlap fill seismic facies and mounded seismic facies) are established.According to seismic facies parameters such as interior structure,exterior shape of seismic reflection units,reflected wave termination types,frequency,amplitude,continuity,and bed velocity,five groups and eight sub-groups of seismic facies are identified.This study establishes correlation among seismic facies,sedimentary facies and log facies based on sedimentary microfacies on cross-well section,analyzes the significance of seismic facies,and predicts the distribution of the favorable sedimentary facies in this area.
Based on the theory and method of seismic stratigraphy in combination with synthetic seismogram calibration,Xujiahe Formation is divided into four third-order seismic sequences.Two primary seismic facies models(onlap fill seismic facies and mounded seismic facies) are established.According to seismic facies parameters such as interior structure,exterior shape of seismic reflection units,reflected wave termination types,frequency,amplitude,continuity,and bed velocity,five groups and eight sub-groups of seismic facies are identified.This study establishes correlation among seismic facies,sedimentary facies and log facies based on sedimentary microfacies on cross-well section,analyzes the significance of seismic facies,and predicts the distribution of the favorable sedimentary facies in this area.
引文
[1]郑荣才,叶泰然,翟文亮,等.川西坳陷上三叠统须家河组砂体分布预测[J].石油与天然气地质,2008,29(3):405-417.
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[3]施振生,杨威,金惠,等.川中—川南地区上三叠统沉积相研究[J].沉积学报,2008,26(4):211-220.
[4]魏国齐,刘德来,张林,等.四川盆地天然气分布规律与有利勘探领域[J].天然气地球科学,2005,16(4):437-442.
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[8]李剑波.川西坳陷中段沙溪庙组测井相和地震相即砂体展布特征[J].成都理工学院学报,2001,28(3):279-283.
[9]施振生,金惠,郭长敏,等.四川盆地上三叠统须二段沉积相研究[J].天然气地球科学,2008,19(3):339-346.
[2]古俊林,郑荣才,罗平,等.川西坳陷中—南段须家河组层序地层格架与生储盖组合[J].成都理工大学学报,2004,31(3):282-290.
[3]施振生,杨威,金惠,等.川中—川南地区上三叠统沉积相研究[J].沉积学报,2008,26(4):211-220.
[4]魏国齐,刘德来,张林,等.四川盆地天然气分布规律与有利勘探领域[J].天然气地球科学,2005,16(4):437-442.
[5]吴因业,顾家裕.油气层序地层学[M].北京:石油工业出版社,2002:72-73.
[6]刘震.储层地震地层学[M].北京:地质出版社,1997:68-75.
[7]于兴河.碎屑岩系油气储层沉积学[M].北京:石油工业出版社,2002:232-237.
[8]李剑波.川西坳陷中段沙溪庙组测井相和地震相即砂体展布特征[J].成都理工学院学报,2001,28(3):279-283.
[9]施振生,金惠,郭长敏,等.四川盆地上三叠统须二段沉积相研究[J].天然气地球科学,2008,19(3):339-346.
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