Deep well disposal : an analytical model



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Properly located, constructed and operated subsurface disposal systems can provide safe storage of industrial wastewaters. Improper planning can result in environmental or economic failure of a deep disposal well. Steps can be taken to minimize the risk of damaging a deep well prior to start-up. The engineering approach combines analytical flow tests with computer simulation to predict disposal well behavior. A dynamic model helps discover potential problems and provide solutions early in the life of the subsurface disposal system. In this investigation, a disposal system for the in-situ uranium mining wastewater was studied. Core flow tests were conducted to provide data for computer simulations. Mineral scaling and water sensitivity were discovered to be problems. Recommendations were made to improve operations of the subsurface disposal system.