Trends in NMR Logging

For help in preparation of this article, thanks to Rob Badry, Calgary, Alberta, Canada; Kamel Bennaceur, Dylan Davies, Robert Freedman and Bruce Kaiser, Sugar Land, Texas, USA; Dale Logan, Midland, Texas; Robert Kleinberg, Ridgefield, Connecticut, USA; Don McKeon, Montrouge, France; LSD Onuigbo, Lagos, Nigeria; and Lee Ramsey and Frank Shray, Houston, Texas. CMR, CMR-200, CMR-Plus (Combinable Magnetic Resonance), DMR (Density-Magnetic Resonance Interpretation Method), FracCADE, FMI (Fullbore Formation MicroImager), MDT (Modular Formation Dynamics Tester), OFA (Optical Fluid Analyzer), PowerSTIM and TLC (Tough Logging Conditions) are marks of Schlumberger. MRIL and MRIL-Prime are marks of NUMAR Corporation. During the past decade, the remarkable technology of nuclear magnetic resonance