伏龙泉断陷营城组地震相展布及地质意义
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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,通过合成记录进行层位标定。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,伏龙泉断陷营城组识别出6种地震相,包括中强振幅不连续杂乱地震相,中振幅较连续亚平行地震相,中强振幅较连续前积地震相,弱振幅较连续亚平行地震相,弱振幅弱连续前积地震相,中振幅弱连续亚平行地震相。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.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,six groups of seismic facies are identified.They are strong clutter amplitude discontinuous seismic facies,medium amplitude continuous sub-parallel seismic facies,strong amplitude continuous foreset facies,weak amplitude continuous sub-parallel seismic facies,weak amplitude continuous foreset seismic facies,weak amplitude weak continuous foreset facies,and weak amplitude weak continuous subparallel seismic facies.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.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,six groups of seismic facies are identified.They are strong clutter amplitude discontinuous seismic facies,medium amplitude continuous sub-parallel seismic facies,strong amplitude continuous foreset facies,weak amplitude continuous sub-parallel seismic facies,weak amplitude continuous foreset seismic facies,weak amplitude weak continuous foreset facies,and weak amplitude weak continuous subparallel seismic facies.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
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[3]胡望水,吕炳全,张文军,等.松辽盆地构造演化及成盆动力学探讨[J].地质科学,2005,40(1):16～31.
[4]张玉明,李明,李瑞磊.松辽盆地南部深层系天然气藏规律[J].石油与天然气地质,2006,27(6):841～848.
[5]李岩峰,刘殊.四川洛带气田遂宁组储层地震响应特征及预测[J].勘探地球物理进展,2004,(5).
[6]段玉顺,李芳.地震相的自动识别方法及应用[J].石油地球物理勘探,2004,(2).
[7]穆星.利用地震几何属性和自组织神经网络进行地震相的自动识别[J].地质科技情报,2005,(3).
[8]刘伟:柴达木盆地西部古近系与新近系的地震相.天然气工业,2008,(5).
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