作　　者： ; (谈迎）; (吴小奇）;

机构地区： 广东石油化工学院

出　　处： 《天然气地球科学》 2018年第2期245-250,共6页

摘　　要： 脆性矿物指数是用来优选页岩气甜点区的重要参数,针对目前普遍采用的基于弹性参数预测脆性矿物指数的Rickman法地区适应性差的问题,提出了一种纵横波速度预测方法。该方法以黏土矿物和脆性矿物弹性参数为基础,并基于Wyllie方程推导而形成的一种脆性矿物指数预测方法。该方法预测脆性矿物指数仅需要考虑纵波和横波速度参数,方法简单且具有明确的物理学基础和明确的地质含义。在四川盆地某地区S井的应用表明,该方法的预测精度优于Rickman方法,所以纵横波速度法能够有效指导研究区的脆性矿物指数预测。 Brittleness index is an important parameter to select shale gas sweet spot.In view of the poor adaptability of Rickman method,which is widely used to predict brittle mineral index based on elastic parameters,a P-wave and S-wave velocity method for prediction is proposed.The brittle mineral index prediction method is derived based on the Wyllie equation,in which some elastic parameters,such as clay minerals and brittle minerals,are needed to be considered.This method only needs to consider the parameters of P-wave and S-wave in predicting brittle mineral index,which is simple and has a clear physical basis and clear geological meaning.The application in Well S in a certain area of Sichuan Basin shows that this method has higher prediction accuracy than the Rickman method.Therefore,the P-wave and S-wave velocity method can effectively guide the prediction of the brittle mineral index in the study area.

关 键 词： 纵横波速度法 脆性矿物指数 法 方程 页岩气甜点区

领　　域： [石油与天然气工程—油气勘探]