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本文在深入研究盖层岩性及其封闭机理的基础上，通过盖层在地震剖面上特殊反射特征的分析，以及盖层排替压力和地层压力与地震层速度之间函数关系的确定，建立了一套在地震剖面上预测厚盖层空间分布及利用地震层速度在平面上研究盖层物性和压力封闭能力的方法。实例研究结果表明，利用地震资料研究盖层及其封闭能力不仅在理论上是可行的，而且可为盖层评价提供更多的信息，使盖层的评价结果更加可靠。
Based on the deep study of lithology and its sealing mechanism, this paper analyzes the special reflection characteristics of caprock in seismic profile and the determination of the functional relationship between cap displacement pressure and formation pressure and seismic velocity. A set of methods to predict the spatial distribution of thick caprock on the seismic section and to study the properties of the caprock and the pressure sealing ability in the plane by using the seismic velocity. The results of the case study show that using the seismic data to study the caprock and its sealing ability is not only theoretically feasible, but also provides more information for caprock evaluation and makes the caprock evaluation more reliable.