Seismic data interpretation of the Snøhvit gas field - .

Abstract

In this work, 3D seismic and well data are used for mapping the Snøhvit reservoir and modelling the hydrocarbon column through Petrel software. The reservoir mapping procedure consisted in interpreting horizons, faults and other relevant features. This mapping and modelling process have been done after exporting and calibrating the data. The data calibration consisted of tying seismic to well data. This had been done using check shots (well data) to produce a Time Depth Relationship (TDR) and, thereafter, mimic the seismic data at well location, i.e. produce a synthetic seismogram for the 7121_6_1, 7121_4_1 and 7121_5_1 wells all, inside the cube. The seismograms were used through a local comparison with seismic data followed by adjustment to bring coincidence in real and convolved seismic data. Later on, the Time Depth Relationship was used to build the velocity model which have been used to convert objects (interpreted well top surfaces, fluid contacts surfaces) in forward direction, i.e. time to depth domain.