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在地震反演中分析虚速度测井所得的旅行时间可用来估算油藏孔隙率。本文所述的四步计算过程为:(1)地震道反演和层速度计算;(2)准确的地层解释;(3)为计算孔隙率确定岩石物理参数;(4)分析成果的可靠性及作最终校正.本文讨论了该方法的可行性及局限性.出现误差的原因之一是:因地震资料容易获得的是波阻抗而不是速度,并且,由断裂形成的孔隙对速度影响轻微,但对渗透性却影响甚大.本文展示了两种最有意义的油藏类型即碳酸盐岩及碎屑岩油藏的工作成果,属于后一种类型情况还有待检验。前一种情况以原生孔隙率为主。而第二种情况很复杂,其中原生与次生孔隙率并存.
Analysis of the velocity logs obtained during seismic inversion can be used to estimate reservoir porosity. The four-step calculation process described in this article is: (1) seismic trace inversion and velocity calculation; (2) accurate interpretation of the formation; (3) determination of petrophysical parameters for porosity calculation; (4) analysis of the reliability of the results And make the final correction.This paper discusses the feasibility and limitations of this method.One of the reasons for the error is that the impedance is easier than the velocity because of the seismic data, and the pore formed by the fracture has little influence on the velocity, But has a great impact on permeability.This paper presents the work of the two most significant types of reservoirs, carbonate and clastic reservoirs, to be tested in the latter type. The former is dominated by primary porosity. The second situation is complicated, with primary and secondary porosity coexisting.