Dynamic changes in the overburden such as geomechanical variation and hydrocarbon migration which occur between the acquisition of 4D surveys influence reservoir monitoring programs and are typically not compensated for with current industry time-lapse workflows. We utilize pre-stack time-shift analysis for the Central North Sea Shearwater field to interpret observed dynamic overburden signatures in these attributes and propose a relation to 4D anisotropy due to production related stretching and extension. An inversion of the pre-stack time-shift data delineates velocity perturbations in the overburden associated with structural extension effects.
|Number of pages||5|
|Journal||SEG Technical Program Expanded Abstracts|
|Publication status||Published - 2018|
|Event||88th Society of Exploration Geophysicists International Exposition and Annual Meeting 2018 - Anaheim, United States|
Duration: 14 Oct 2018 → 19 Oct 2018
ASJC Scopus subject areas