Enhanced Diffusion: Expanding The Range of NMR Direct Hydrocarbon-Typing Applications

摘要

This paper introduces a new gradient NMR logging technique, called the Enhanced Diffusion Method (EDM), which exploits the diffusion contrast between oil and water to separate the NMR signals from each fluid. Unlike standard NMR logs acquired with short inter-echo time spacing T_E, EDM data are acquired using relatively logn T_E's to deliberately accentuate diffusion effects.