Background
NMR logging tools respond primarily to four formation fluid properties: Hydrogen Index (HI), Longitudinal Relaxation Time (T₁), Transverse Relaxation Time (T₂) and Diffusion Coefficient (D). Alone, the NMR logging tool can provide measurements of effective porosity, irreducible water saturation and permeability. It can also provide a description of pore geometry, and a NMR signature that characterizes the formation fluid in the measurement volume. With the assistance of other logging tool measurements, the NMR tool can quantify bitumen content and hydrocarbon volumes. The logging tools that are currently marketed (CMR, MRIL) were developed in environments that are unlike the West Canada Sedimentary Basin. Some preliminary characterization work related to Canadian Carbonate reservoirs deals primarily with the determination of the T₂ at S_wi conditions. We propose to enhance and extend this process in characterizing core from Canadian reservoirs by obtaining pore size distribution measurements, resistivity measurements and corresponding NMR signals in conventional oils. In addition, we plan to further extend the applicability of NMR measurements in the characterization of heavy oil reservoirs.