3D Broadband MAZ Seismic Impacting Development Drilling at M Field, Offshore Malaysia

The 2013 MAZ broadband seismic has met its technical and business objectives. The value of acquiring additional azimuths is also demonstrated; it is observed that not one azimuth is better than the other. Each azimuth illuminates the complex structures and faults differently. The use of CMS signature for debubbling showed significant improvement and it should be applied wherever available.

Interpretation of the PreSTM volumes led to optimization of the trajectories of the well paths. These seismic volumes also enabled further assessments of the presence of geohazards, i.e. high amplitudes and faults, from seabed to top reservoir.When the final PreSDM was delivered, time to depth conversion was updated using the anisotropic velocity volumes (resulting from PreSDM) and the casing depths were fine tuned. The PSTM velocity as well as the PreSDM velocity volumes were used for getting a handle on the possible uncertainties associated with the depth conversion. The final PreSDM showed a tremendous improvement in imaging of faults, structure and stratigraphy and a very good depth positioning of known seismic markers to formation tops of existing wells, superior to any legacy or other depth conversion.