Abstract：Two-step approximate formula of seismic velocity in sand and shale formation is given on the basis of core analysis，logging data interpretation and wave velocity mechanism analysis. Time average equation in two element medium is extended into three element medium，so that both sand/shale ratio and porosity can be calculated successfully. A case study of reservoir in the Z'arim basin is presented in the article.
朱向东, 康利平, 董月霞. 速度的三元介质模型[J]. 石油地球物理勘探, 1993, 28(1): 51-58.
ZHU Xiang-dong, KANG Li-ping, DONG Yue-xia. Velocity model in three element medium. OGP, 1993, 28(1): 51-58.
