Improved Oil Recovery in Carmopolis Field: R&D and Field Implementations

摘要

Carmopolis field, in northeastern Brazil's Sergipe/Alagoas basin is the country's largest onshore oil accumulation at 253×10~6 m~3 original oil in place (OOIP) and a current total oil production of 2880 m~3/d. Discovered in 1963, it was quickly put into primary production. Waterflooding followed in 1971 at the central portion of the field. The combination of adverse fluid mobility ratio, reservoir heterogeneity, and the lack of proper selective injection led to the quick decline of production; however, a major program of selective plugging, stimulation, and selective injection was able to stabilize production immediately.