Abstract The Caño Limón Field, discovered in 1983, is the giant oil field that made Colombia self-sufficient in oil. The field contains over a billion barrels of recoverable oil, and as of publication date, has produced over fifty percent of its reserves. The current production rate is 215,000 BOPD. Sound reservoir and production management has resulted in an expected ultimate oil recovery of about 58 percent of the Oil-in-Place. The field has a current watercut of 80%, thus, the operator is managing the high disposal of large volumes of produced fresh water (over a million barrels per day) with minimum impact on the environment. This has been accomplished by treating and disposing the produced water with compliance of strict environmental guidelines. High recovery factors have been achieved by the implementation of technologies such as those listed below: Reservoir management techniques used to define new well locations and strategically select completion and recompletion intervals by: a) making extensive use of a 3-D simulation model, and b) implementing a well defined program of reservoir monitoring using production logs, single well pressure tests and multiwell interference tests. Experience with state of the art electrical submersible pumps (ESPs) and variable speed drives (VSDs) in lifting large fluid volumes, up to 22000 BFPD per well, with associated sand production ranging from 0 to 200 ppm. This has enabled high oil production rates to be maintained, and oil recovery to be maximized in spite of the high watercuts associated with this very active water drive field. ESP completions with Y-tools are strategically placed to provide for the ability to perform reservoir monitoring surveys. Automated and continuous well production measurement techniques (rates and watercuts) are used to monitor individual well performance, allowing for the implementation of corrective actions in a timely manner. Treatment and disposal of the large amount of produced water in compliance with strict environmental guidelines. The field is located on the eastern edge of the Llanos (Plains) of Colombia, in an ecological area that can be described as flood plains. This area is normally flooded during the rainy season from June through October. Measures are taken to restore and maintain the natural environment of the area.