Improving 4D seismic interpretation and seismic history matching using the well2seis technique

A well2seis technique is proposed to incorporate available reservoir data from both 4D seismic and well production domains through cross-correlation, to prevent biased reservoir interpretation. The subsequent well2seis attribute shows the capacity to enhance dynamic reservoir interpretations by quantitatively integrating 4D seismic responses with their corresponding well behaviours. It reduces the interpretation workload by avoiding the need to work on many individual 4D differences separately. A joint workflow is then proposed to close the loop between the observed data and the predictions from the simulation model using the well2seis results. This workflow sequentially makes use of direct updating (for updating static models) and assisted history matching (for updating dynamic models) procedures. In the assisted history matching stage, the well2seis correlation attribute successfully acts as an alternative history matching attribute to the conventional production or 4D seismic data. The application of the proposed approach to a North Sea field shows that both the seismic and production history matching results are simultaneously improved to a satisfactory degree when minimising the misfit between the observed and simulated well2seis attributes.