4D Seismic Physical Simulator:Innovative Monitoring of Pore Network FluidFlooding under X-ray Tomography

摘要

A new methodology is proposed that might be integrated into the more conventional rock physicsworkflow, to calibrate the petro-elastic model for time lapsed seismic interpretation; this methodologyis valuable especially when partial saturations and complex fluid fronts are expected in the porenetwork of a reservoir. A laboratory equipment, specially designed for 4D seismic studies has beendeveloped and tested. The equipment can be used to monitor the flooding process simultaneously byacoustic and X-ray methods. For the presented case, we measure P-wave travel-times by placing 4transducer pairs along a 30 cm long core during a series of fluid flooding experiments. In addition tothese measurements selected X-ray scans are taken at selected cross sections along the core, in order toimage the heterogeneity of the fluids flow. We found a good correlation between measured velocitychanges and imaged fluid saturation changes, both with respect to monitoring time and spatial locationalong the core sample.