孔隙结构参数在普光气田的初步应用

Preliminary application of the frame flexibility factor in Puguang gas field

张汉荣 孙跃峰 窦齐丰 张婷婷

Zhang Hanrong Sun Yuefeng Dou Qifeng Zhang Tingting

影响地震波速度的因素除了岩层的孔隙度外,孔隙结构的差异会使地震波速度的分布变得复杂,以致于影响速度-孔隙度模型的准确性。文中介绍了荷兰皇家壳牌石油公司命名的孙氏模型及孔隙结构参数的计算方法。孔隙结构参数是描述孔隙结构对地震波速度产生影响的新的岩石物理参数,可以用于刻画不同的孔隙空间类型,可以将速度-孔隙度一元关系改善为速度-孔隙度-孔隙结构参数二元关系。孔隙结构参数也可以表征渗透率的非均质性,将孔隙度-渗透率一元关系改善为孔隙度-渗透率-孔隙结构参数二元关系,为储层孔隙度和渗透率的预测提供了理论模型,使地震尺度上用孔隙度、渗透率、孔隙结构表征储层成为可能。该方法在普光气田的初步应用效果良好。

In addition to rock porosity,pore structure (pore size and geometry) also affects velocity of seismic waves,lowering the accuracy of reservoir prediction of velocity-porosity model.This paper introduces the Sun Model named by Shell for advanced carbonate reservoir characterization,a new rock-physics-based parameter called frame flexibility factor,and the method of how to calculate this parameter.The frame flexibility factor can be used as a pore type indicator to quantify the effects of pore structure on velocity and permeability and establishes relations among porosity-sonic velocity-frame flexibility factor instead of porosity-sonic velocity.It also can be used to describe permeability heterogeneity,and establish relations among porosity-permeability-frame flexibility factor instead of porosity-permeability.Theoretical model has been built for porosity and permeability prediction and makes it possible to characterize reservoirs with porosity,permeability and pore structure on seismic.Good results have been achieved through the utilization of the model in the Puguang gas field.

10.11743/ogg20120608