Paper Summary
Understanding the elastic properties of reservoirs in exploration can be very challenging - due mainly to the lack of well information, limited regional geological understanding, and the quality and reliability of seismic data available. This case study illustrates how this challenge can be addressed through an integrated solution from broadband seismic acquisition to elastic properties, applied recently to the underexplored deep-water Orphan Basin, offshore Eastern Canada. A multisensor seismic dataset covering close to 22,500 km2 was acquired over three seasons (from 2017 to 2019) andnow constitutes a great platform for understanding the geology as well as extracting elastic properties. The understanding of the prospectivity was performed at the regional scale, then on more localized area using one of thevery few wells present in the area. On this localized area the newest depth imaging technologies with Full Waveform Inversion (FWI) and Least-Squares Migration (LSM) were used. In addition, a three term Amplitude Versus Angle(AVA) inversion was performed and matched at the well without using the well actively in the process but by using the broadband seismic data only: velocity and amplitude. Turnaround time was also a key element in this regionalproject. To significantly reduce this, an integrated team of imaging and quantitative interpretation specialists was dedicated to the project from the start. Pre-stack AVO QCwas performed iteratively during the processing to ensure that the final pre-stack data was fit for purpose and AVO/AVA compliant for further Quantitative Interpretation (QI) analysis.