交叉偶极声波资料地层裂缝评价

XMAC-Ⅱ将偶极子技术与单极子技术有效的结合在一起,提供了测量地层纵波、横波和斯通利波时差的最好办法,重点阐述了利用斯通利波反射系数、流体移动指数以及通过提取快慢横波信息得到的地层各向异性大小来进行裂缝识别以及评价有效性,通过对ⅩⅩ地区B281井裂缝性储层的实际应用,对裂缝性储层评价结果与成像资料有很好的相关性,获得了好的应用效果,为识别裂缝提供了一个很好的技术手段。

Evaluation on formation structure from cross-dipole acoustic logging data

With the effective combination of dipole and mono- pole technique,XMAC-Ⅱprovides the best measure- ment to acquire time difference of compressional,shear, and Stonley wave.This paper elaborates the method which uses the reflex coefficient of Stonley,fluid-moved index and the anisotropy by extracting the fast and slow wave information,to identify fractures and evaluate the effectiveness of fractures.Through application on frac- tured reservoir in B281well ofⅩⅩregion,the evaluation result of fractured reservoir is found to be closely related with the imaging data,which provides a good technical method to identify fractures.