摘要
21世纪初D-T2二维核磁共振技术的出现和发展,实现了从D-T2二维谱中快速、精确区分油气水,在测录井和岩石物理分析中得到广泛应用。为推动中国二维核磁共振测井技术的发展,综述国内外D-T2二维核磁共振技术的发展现状。D-T2脉冲序列和数据反演方法是D-T2二维核磁共振的核心技术,列举了常用的PFG、STEPFG、BP-PFG、改良式CPMG、扩散编程、多回波间隔CPMG脉冲序列,介绍了D-T2二维反演方法和一维反演方法。经过详细技术对比得出结论:现有D-T2脉冲序列无法兼顾扩散系数测量范围和横向弛豫分辨率,现有D-T2反演方法无法兼顾解谱效率和反演精度。为D-T2二维核磁共振技术的未来发展指明方向。
The invention and evolution of diffusion-transverse relaxation two-dimensional NMR technology at the beginning of the 21st century make it possible to distinguish fluid types through two-dimensional spectrum conveniently and accurately, therefore it has been widely used in well logging and petro-physical analysis, so it＇s important to summarize the development of D-T2 two-dimensional NMR at home and abroad for accelerating the progress of internal D-T2 technology. Pulse sequence and inversion method are the key technique of D-T2 two-dimensional NMR, with comparison of pulsed filed gradient, stimulated echo pulsed filed gradient, bi-polar pulsed filed gradient, the modified CPMG, diffusion editing and multi echo interval of CPMG pulse sequences, as well as comparison of two-dimensional inversion method and one-dimensional inversion method, we got inclusion that： the existing D-T2 pulse sequences cannot balance the diffusion coefficient measurement range and transverse relaxation resolution, the existing D-T2 inversion methods cannot balance the inversion efficiency and inversion accuracy, so indicating the develop direction of D-T2 two-dimensional NMR technology in the future.
出处
《测井技术》
CAS
CSCD
2015年第3期261-271,共11页
Well Logging Technology
基金
"十二五"国家油气重大专项(2011ZX05020008-002)
国家重大科学仪器设备开发专项(2013YQ170463)
国家自然科学基金项目(41174099)资助
关键词
测井技术
二维核磁共振
二维谱
脉冲序列
二维反演方法
一维反演方法
well logging technology
two-dimensional NMR
two-dimensional spectrum
pulsesequence two-dimensional inversion method
one-dimensional inversion method
