The proposed effort is a critical part of MVA programs for CO2 sequestration. The benefits include improved zonal isolation, higher data rates, and longer sensor battery life. Understanding reservoir stability and annulus cementing integrity will help determine new isolation criteria and verify existing operation. The new sequestration wells have applicability for greenhouse gas storage, environmental monitoring, and science experimentation (e.g., materials and sensor science. The project will demonstrate the feasibility of a pup joint telemetry system. In order to verify that the reservoir fluids are not entering drinking water aquifers, the sensors must stay in direct contact with the reservoir and maintain isolation to prevent leakage pathways and permit high data rates across the casing. The project concludes with a demonstration of the system and feasibility of approach. During Phase I, the effort first the project develops inductive power systems which use magnetic fields to supply power wireless. Second, the project integrates RF systems to communicate through the well casing. Third, the effort develops a pressure housing that protects the electronics from the high pressures. Fourth, the effort demonstrates feasibility with a demonstration of the technology.First, during cementing, economic and safety reasons make determination of the top of cement (TOC) important. Second, during operation, such a sensor monitors zonal isolation, which prevents oil reservoir chemicals from entering aquifers. Finally, for plug and abandonment at the end of well life, sensors monitor the long-term stability of the plug for both CO2 sequestration and oil wells.
