True 4D-Ready-Seismic Utilizing Q-Marine

摘要

Seismic reservoir monitoring has demonstrated itsrneffectiveness to help understand the dynamic behavior of thernreservoir and its value for reservoir management. The methodrnhas a yet unrealized potential that will open for wider use, ifrnhigher repeatability can be obtained. Wider applications willrnbe more quantitative interpretations, monitoring over shorterrntime intervals, and application of the technology to smaller,rntighter, and more complex reservoirs.rnPerturbations, (errors and differences), between differentrnphases of a 4D seismic study create noise when datasetsrnacquired at different times are analyzed to detect changes inrnthe subsurface. This noise can mask the subtile variations inrnthe seismic response of the reservoir that indicate changes inrnpore fluids. The effects of perturbations have been studied andrnthe impact on seismic data quality quantified. Thernspecification criteria for Q-Marine have been set to address thernsources of perturbations that impact the quality of seismicrndata, both for high-resolution imaging and repeatability in 4Drnstudies. This paper will describe the new technology and showrnexamples of the ability to remove the perturbationsrnexperienced in conventional seismic data.rnWe conclude by explaining how 4D seismic surveysrnutilizing the new Q-Marine concept will be a very costeffectiverntool for management of the reservoir throughout itsrnlifetime.