利用声波测井资料预测油井出砂的问题研究

Problems in Predicting Sand Production with Sonk Logging Data

针对利用声波测井资料预测油井出砂存在的问题,讨论了孔隙度、胶结作用、流体类型对疏松砂岩声波波速的影响,分析了常用出砂预测指标(包括声波时差、孔隙度、组合模量和出砂指数等)。得出组合模量和出砂指数实质上是同一参数;在利用声波测井资料预测油井出砂时应考虑饱和流体和胶结特性的重要影响;认为考虑两个因素的双参数预测方法是声波测井法预测油井出砂的发展方向。

In consideration of the problems in predicting sand production with sonic logging data, the effect of permeability, consolidation, fluid type on acoustic velocity of unconsolidated sandstones is discussed. The generally used sand production predicting indications including interval transit time, permeability, combined modulus and sand producing exponents are analyzed. It is considered that the combined modulus and sand producing exponents are the same parameters in fact. When sonic logging data are used to predict sand production, the important effect of fluid and consolidation properties are considered. The predicting method of double parameters, in which these 2 factors are considered is a trend of sand production prediction with sonic logging.