A method for analysing formation fluids in a borehole environment in a flow-through vessel having a polarisation section generating a first substantially uniform static magnetic field, the method comprising: (a) introducing the formation fluids in the flow-through vessel located in a borehole; characterized by: (b) passing the introduced formation fluids through the polarisation section of the vessel and through a stabilization section generating a second substantially uniform static magnetic field, wherein the stabilization section is downstream of the polarisation section, and through a NMR section generating a third substantially uniform static magnetic field, wherein the NMR section is downstream of the stabilization section; (c) generating pulsed oscillating magnetic fields for exciting nuclei of the formation fluids in a transmit section and in a transceive section as part of the NMR sectionof the vessel, wherein the transceive section is downstream of the transmit section, and said oscillating fields have a magnetic direction substantially perpendicular to the direction of the second substantially uniform static magnetic field; (d) receiving nuclear magnetic resonance relaxation signals from the excited nuclei of the formation fluids in the transceive section of the vessel; and (e) analysing the received NMR signals to determine at least one NMR relaxation time (T 1,T 2) and to determine, based on the at least one NMR relaxation time (T 1,T 2), fluid properties of the formation fluids in the vessel at flow rates up to a limit that depends on the relative dimensions of the polarisation section, of the stabilization section and of the NMR section of the vessel. (a) introducing the formation fluids in the flow-through vessel located in a borehole; characterized by: (b) passing the introduced formation fluids through the polarisation section of the vessel and through a stabilization section generating a second substantially uniform static magnetic field, wherein the stabilization section is downstream of the polarisation section, and through a NMR section generating a third substantially uniform static magnetic field, wherein the NMR section is downstream of the stabilization section; (c) generating pulsed oscillating magnetic fields for exciting nuclei of the formation fluids in a transmit section and in a transceive section as part of the NMR sectionof the vessel, wherein the transceive section is downstream of the transmit section, and said oscillating fields have a magnetic direction substantially perpendicular to the direction of the second substantially uniform static magnetic field; (d) receiving nuclear magnetic resonance relaxation signals from the excited nuclei of the formation fluids in the transceive section of the vessel; and (e) analysing the received NMR signals to determine at least one NMR relaxation time (T 1,T 2) and to determine, based on the at least one NMR relaxation time (T 1,T 2), fluid properties of the formation fluids in the vessel at flow rates up to a limit that depends on the relative dimensions of the polarisation section, of the stabilization section and of the NMR section of the vessel. (b) passing the introduced formation fluids through the polarisation section of the vessel and through a stabilization section generating a second substantially uniform static magnetic field, wherein the stabilization section is downstream of the polarisation section, and through a NMR section generating a third substantially uniform static magnetic field, wherein the NMR section is downstream of the stabilization section; (c) generating pulsed oscillating magnetic fields for exciting nuclei of the formation fluids in a transmit section and in a transceive section as part of the NMR sectionof the vessel, wherein the transceive section is downstream of the transmit section, and said oscillating fields have a magnetic direction substantially perpendicular to the direction of the second substantially uniform static magnetic field; (d) receiving nuclear magnetic resonance relaxation signals from the excited nuclei of the formation fluids in the transceive section of the vessel; and (e) analysing the received NMR signals to determine at least one NMR relaxation time (T 1,T 2) and to determine, based on the at least one NMR relaxation time (T 1,T 2), fluid properties of the formation fluids in the vessel at flow rates up to a limit that depends on the relative dimensions of the polarisation section, of the stabilization section and of the NMR section of the vessel.