Abstract: Combinable Magnetic Resonance Log (CMR) has significant advantage over conventional well logs. It can provide visually and accurately porosity and permeability of reservoirs, distinguish movable fluid and irreducible or bound fluid, and reflect pore structures in them. This paper analyzed and compared the porosity and permeability by CMR with those from core lab, establishing the corresponding relations between them in order to allow detailed and correct description of reservoir parameters. Also, on the basis of mercury injection experiment, the capillary pressure data vs. aperture distribution by CMR were studied, which laid a basis for applying T₂ spectrum to inversing capillary pressure curves. Finally, this paper conducted recognition of pay zone and gas reservoir, and estimated oil-gas bearing saturation by solving irreducible fluid saturation integrated with resistivity log and Archie's saturation interpretation model, thus widening out scope of using CMR data, providing a new technique for evaluation of pay zone or gas reservoir.

Key words: combinable magnetic log, core analysis data, mercury injection experiment, water saturation, oil-gas bed