道积分剖面薄互层特征解释及三维地质物性参数体模拟  

Interpretation of thin interbeds in trace integration section and modeling of three-dimensional petrophysical parameter volume

作　　者：张立昌[1] 王英桂 卢春喜[1] 

机构地区：[1]胜利石油管理局物探公司

出　　处：《石油地球物理勘探》1993年第3期301-313,共13页Oil Geophysical Prospecting

摘　　要：道积分值代表相对波阻抗值,它反映了地震剖面上相对层速度的变化。目前,在绝对层速度剖面很难取准的情况下.用相对层速度剖面结合钻井、测井、油田地质等资料,同样可以对薄互层储层进行定量描述和物性参数(孔隙率、渗透率、饱和度)三维空间的模拟。文中对多种复杂薄互层地质模型产生的道积分剖面进行了研究.系统地描述了薄储集层道积分剖面的特征,并首次提出不依赖于子波类型(要求零相位)的道积分特征公式,为进行定量解释和数值模拟提供了理论依据。另外,本文还提出了道积分剖面薄互层厚度的定量解释方法,以及从井资料出发建立孔隙率、渗透率、饱和度等物性参数三维数据体的方法。Trace integration value represents relative wave impedance.it reflects the variation of relative interval velocity in a seismic section. When absolute interval velocity section can hardly be produced.relative interval velocity section along with drilling, logging.oil field geological informations and so forth can also be used to quantitatively describe thin interbedded reservoir and to model the petrophysical parameters (porosity.permeability and saturation )in three dimensional space. Some trace integration sections produced from the geological models of different complicated thin interbeds are analysed in detail. The characteristics of trace integration section which involves thin interbedded reservoir are detailed systematically. Trace integration characteristic formula independent of wavelet type (zerophase wavelet required)is proposed.offering a theoretical basis for quantitative interpreta tion and numerical modeling. Furthermore, the paper explains how to quantitatively interpret thin interbed thickness in trace integration section, and how to derive three-dimensional data volume of porosity, permeability or saturation,etc. from logging data.

关 键 词：道积分 薄互层 地震数据 解释 

分 类 号：P631.441[天文地球—地质矿产勘探]