Obtain real-time downhole fluid sampling

Sample contamination monitoring during pumping and cleanup using an InSitu Fluid Analyzer* real-time downhole fluid analysis system obtained flowline resistivity, fluid density, and live pH measurements. Mud filtrate contamination values were also estimated from fluid density, resistivity, and a computed conductivity. Four high-quality one-gallon water samples were obtained, depressurized on surface, and sent to a laboratory for geochemical analysis to ensure that total dissolved solids were above the minimum level required by regulatory authorities.

Once storage is established, geomechanical studies must be undertaken to establish ideal injection pressure for confinement. A mechanical earth model (MEM) was constructed based on data acquired with the Sonic Scanner* acoustic scanning platform. The platform accurately measures elastic properties axially, radially, and azimuthally to support geomechanical, geophysical, and fracture modeling. By calibrating the MEM with hard data from the MDT* modular formation dynamics tester stress test results, observing wellbore failures from Quanta Geo* photorealistic reservoir geology service images, and obtaining measurements on core, a robust model was developed to define caprock and injection zone boundaries, while adding the further benefit of improved future drilling efficiencies.