Field and Laboratory Support for the Co-Production of Gas and Water Program.Annual Report, April 1989-April 1990

摘要

The water-drive N.E. Hitchcock Frio 'A' reservoir was produced as a conventionalgas reservoir from 1958 through 1982. By 1980 all but one well had watered out and been plugged and abandoned. The reservoir management strategy shifted to co-production in 1983 with the reentry of two wells and recompletion for high-volume brine production. Production of 10,000 barrels per day of brine, with tidal disposal through the spring of 1986, reduced reservoir pressure to the trapping pressure. Success in disposal well research in 1987 made higher brine rates possible, averaging 20,000 barrels of brine per day for the year covered by the report. Resultant drawdown to 3460 psia, 400 psi below the trapping pressure, clearly resulted in mobilization and production of trapped gas. A total of 5.6 billion SCF of gas, 0.29 million barrels of oil, and 26.6 million barrels of brine have been produced since co-production began in 1983. The primary IGT achievements during this reporting year have been definition of the factors that control the injectivity of disposal wells and definition of technical factors relevant to the impacts of disposal well life and corrosion upon economics. The chemical and physical analyses that formed the basis for the engineering are presented.