4D Modelling of OWC Movement in Low NTG Areas of the Nelson Field

A-07 4D MODELLING OF OWC MOVEMENT IN LOW NTG AREAS OF THE NELSON FIELD 1 Summary A workflow has been established to build detailed meso-scale geological and reservoir models of turbidite systems from core log and laboratory data from which the 4D seismic response can then be calculated. This is used to investigate oil and water movement in the channel margins and interchannel regions of the Nelson field where poor net-to-gross is known to compromise 4D seismic resolution. The analysis confirms that saturation effects dominate and that the characteristic troughpeak signature in the difference volumes formed by the sweep of