CAJ | 학술논문

提出一种核磁共振多回波串数据联合反演方法,分别对核磁共振孔隙度测量的两组回波串数据、变等待时间多回波串数据以及变回波间隔多回波串数据进行了处理.结果表明.这样处理得到的一维核磁共振T_2分布不但连续,而且能够揭示短横向弛豫组分的细微特征,提高了核磁共振孔隙度的精度.处理变等待时间或变回波间隔下的多回波串数据,可以得到孔隙流体的(T_2,T_1)或(T_2,D)二维核磁共振分布图.与一维核磁共振T_2分布相比,二维核磁共振提高了识别流体的效果.
제출일충핵자공진다회파천수거연합반연방법,분별대핵자공진공극도측량적량조회파천수거、변등대시간다회파천수거이급변회파간격다회파천수거진행료처리.결과표명.저양처리득도적일유핵자공진T_2분포불단련속,이차능구게시단횡향이예조분적세미특정,제고료핵자공진공극도적정도.처리변등대시간혹변회파간격하적다회파천수거,가이득도공극류체적(T_2,T_1)혹(T_2,D)이유핵자공진분포도.여일유핵자공진T_2분포상비,이유핵자공진제고료식별류체적효과.
A method for multiple echo trains jointing inversion of NMR measurement data sets is suggested in this paper.The availability of the method is proved by processing NMR porosity measurements data,multiple echo trains data sets with variable waiting time and variable echo spacing.The one-dimensional T_2 distribution obtained by this method is not only smooth,it also shows subtle features in the short relaxation time.The accuracy of NMR porosity is improved.(T_2,T_1) or (T_2,D)two-dimensional distributions can be obtained by processing multiple echo trains with variable waiting time or variable echo spacing respectively.The results demonstrate the advantage of using two-dimensional NMR for fluid typing over conventional T_2 distribution.