疏松砂岩弹性波速模型的研究

疏松砂岩油藏的开发目前已成为我国石油工业最重要的经济增长点之一,研究疏松砂岩弹性波速的模型将有助于此类油田的勘探开发。首先讨论了现有各类模型存在的不足,并在这些模型的基础上,提出了新的疏松砂岩弹性波速分析模型。该模型充分考虑了胶结作用和孔隙度对弹性波速的影响,并将胶结作用定量化,引入了胶结指数,该指数不仅反映了胶结量的多少,还能体现胶结的类型。该模型可用于胶结指数反演、出砂预测等方面。

Study of model for elastic wave velocity of unconsolidated sandstone

The development of unconsolidated sandstone oil reservoir has become one of the most important economic growth points for national petroleum industry. The research of model for elastic wave velocity of unconsolidated sandstone will be helpful to the exploration of these fields. The faultiness of existing models was discussed. A new model for elastic wave velocity of unconsolidated sandstone was developed on the basis of these models. In the new model, the influences of cementation and porosity on the elastic wave velocity were considered and the cementation index was introduced. The index could describe the quantity and styles of cementation. The model can be used for the inversion of cementation index and the prediction of sanding.