Can ORC be injected via re-injection wells?
Yes, if the following conditions are met: 1) the wells are constructed properly; 2) the aquifer is capable of accepting the planned volumes of low % solids ORC slurry (range of 10-20%); 3) if the wells are flushed with sufficient clear water chaser (we suggest a minimum of 1-2 well volumes or until the water present is clear); and 4) post-injection clearing of the well screen using a steel wire brush. NOTE: it is critical that all ORC be removed and flushed from the well screen post-ORC injection. Failure to follow these guidelines may result in a reduction in well pack permeability and reduced percentage of well screen openings. For more information on the use of ORC in monitoring wells, please refer to Technical Bulletin 2.3.4: Use in Existing Monitoring Wells.
