Time-Lapse 4D Analysis
With the new time-lapse 4D analysis we can now accurately monitor fluid movements in the reservoir which is driven by improvements in seismic signal fidelity and repeatability from the application of point-receiver technology ‘Seismik 4D’, together with driven Seismic data integration.
By understanding the fluid production and geometry in active reservoirs, we can now detect changes not just in the reservoir, but also in the overburden in real-time. In these reservoirs, production causes subsurface deformations and changes in seismic velocity. These changes in the overburden can be monitored and interpreted using time-lapse ‘Seismik 4D Data’.
The saturation and pressure changes in a reservoir may be determined from many inversion methods; in particular, simultaneous inversion is providing additional quantitative information about reservoir conditions.
History matching using time-lapse seismic data
We can provide interpretations of reservoir pressures, saturation, and even fluid contacts with time-lapse seismic data contribute to production enhancement. Time-lapse seismic data and their interpretations may also be used to constrain production history matching and enhance reservoir simulations.
Time-lapse seismic data may be used to define the fluid-flow characteristics of the reservoir and improve flow models. The technique uses time-lapse seismic methods and allows asset teams to observe the dynamic processes in and around the reservoir, making the development and production stages more successful by placing wells more effectively.
With probability maps, they can be generated using simulation with the different classifications overlap. The maps depict the probability of an area being drained, partially drained, or undrained according to various oil-saturation changes over time. The maps reduce the uncertainty in further development because they are quantitative and are a more powerful input to models.