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地震波在地层中的传播速度与地层的岩性、孔隙含量及所含流体性质等因素有关，利用地层浅反射界面均方根速度及假设的地震层速度推算了地层深反射界面均方根速度，将其与地层深反射界面均方根速度的实测值相比较，根据两者间的差异性质和大小预测地层的岩性和含油性。把该项技术用于研究辽东湾碎屑岩地层及鄂尔多斯盆地碳酸盐岩地层的岩性及含油气性，已经取得了较好的效果．
The propagation velocity of seismic waves in the strata is related to the lithology, pore volume and fluid properties of the strata, and the root mean square velocity of the deep reflection interface of the strata is deduced by using the root mean square velocity of the shallow reflection interface and the hypothesized seismic velocity. Compared with the measured value of the root mean square velocity of the deep reflection interface, the lithology and oil content of the formation are predicted according to the nature and magnitude of the difference between them. This technique has been used to study the lithology and hydrocarbon-bearing property of the Liaodong Bay clastic rock formation and the Ordos Basin carbonate rock formation. Good results have been obtained.