Diffraction Imaging Used to Aid the Understanding of an Injectite Field Reservoir Connectivity – Example on the Quad 9 UK Continental Shelf

Abstract

The hydrocarbons of the Quad 9 fields in the Continental Shelf of the United Kingdom (UKCS) are stored in both submarine fans and injectites emerging from these fans. These injectites are imaged using both Depth Migrated and Diffraction Imaged seismic data. In the latter data set, the energy is focused on these lateral discontinuities in the subsurface. The interpretation of these data is not simple and needs to be done in conjunction with both seismic data sets to extract the most out of these data. After construction of a reservoir simulation model, the pressure and production history match quality were poor. When additional small scale injectites are interpreted on these data sets and included in the simulation model, the reservoir history match is improved significantly.