In recent years, nuclear magnetic resonance (NMR) has been increasingly used for fluidtyping in well-logging because of the improved generations of NMR logging tools. This paper first discusses the applicable conditions of two one-dimensional NMR methods: the dual TW method and dual TE method. Then, the two-dimensional (T₂, D) and (T₂, T₁) NMR methods are introduced. These different typing methods for hydrocarbon are compared and analyzed by numerical simulation. The results show that the dual TW method is not suitable for identifying a macroporous water layer. The dual TE method is not suitable for typing gas and irreducible water. (T₂, T₁) method is more effective in typing a gas layer. In an oil-bearing layer of movable water containing big pores, (T₂, T₁) method can solve the misinterpretation problem in the dual TW method between a water layer with big pores and an oil layer. The (T₂, T₁) method can distinguish irreducible water from oil of a medium viscosity, and the viscosity range of oil becomes wide in contrast with that of the dual TW method. The (T₂, D) method is more effective in typing oil and water layers. In a gas layer, when the SNR is higher than a threshold, the (T₂, D) method can resolve the overlapping T₂ signals of irreducible water and gas that occurs due to the use of the dual TE method. Twodimensional NMR for fluid-typing is an important development of well logging technology.