Speaker(s): Nicolas Mastio

Date: Thursday 29th of November 2018

Location: room G201, ENSG, Nancy


Time-lapse seismic has become a useful tool for reservoir monitoring and well stability assessment. Geophysicists have developed numerous methods to retrieve time-lapse attributes for the reservoir and for the overburden. However, these methods do not consider the physical differences between these two area during the inversion process. From a theoretical perspective, the elastic properties depend on the stress state. Consequently, this induces an anisotropy in the time-lapse velocity change which can have various origins: reservoir compaction, rocks damaging, etc.

Edgar and Mastio (2017) expose a reflection travel time tomography adapted to retrieve the time-lapse velocity change. An extension of this method which considers velocity change general anisotropy is presented and applied to a real case.