Application Of NMR Logging In Reservoir Classification In Hailaer Area

Hailaer area has various types of reservoirs. Reservoir lithology is complicated including sandstone, tuffeous, glutenite and metamorphic rock. Reservoir property varies with both low resistivity oil layer with high irreducible water and high resistivity water layer with poorproperty because of tightrock. Such reservoir variation caused by pore structure difference brings challenge for conventional logging data to accurately classify reservoirs and perform reservoir evaluation.Using NMR logging can accurately provide advantages of reservoir parameters without effect of lithology. Using capillary pressure cure, porosity and irreducible fluid saturation interpreted by NMR to establish reservoir classification standard has coincidence degreemore that 95% verified by oil test data. This solves the problem of difficulty in reservoir evaluation, perfects the reservoir classification by conventional logging and capillary pressure curve of cores, and provides a newmethod for reservoir classification forHailaer area.This topic takes the NMR logging principle as foundation, takes the LogVision software as the backing, unifies the nuclear magnetism laboratory experiment, establishes reservoir parameter porosity, the permeability and saturation explanation model by the NMR logging; researches the the method of computation capillary pressure by the nuclear magnetism T2 spectrum; And using the pore structure parameter to accurately classify reservoir and research the reservoir classification standard.