INJECTION OF INDUSTRIAL WASTE-WATER IN ISRAEL - SITING CRITERIA FOR DEEP INJECTION WELLS AND ASSOCIATED PROBLEMS

Preliminary evaluations of potential sites for deep-well wastewater in jection characteristically make use of existing data from deep borehol es drilled for other purposes. Unlike new drilling and logging operati ons specifically designed to address site-assessment needs, the qualit y of existing data may be questionable and requires special attention. In the present study, the desired features of a subsurface reservoir for wastewater injection are defined and a screening procedure for pot ential reservoirs is presented. Typical problems associated with data from deep oil- and gas-test wells are discussed, and guidelines for sc reening data of rock permeability and formation-water pressure, salini ty and temperature are presented. These problems, as well as solution approaches, are illustrated for two different reservoirs, selected as potentially suitable for deep-well wastewater injection in west-centra l and northern Israel.