| Popis: |
This paper summarizes the achievements of an alliance between Ecopetrol, S.A. and Schlumberger to revitalize the Casabe field, a mature field located in Colombia. Challenges have been multifaceted in this mature complex field. Some relate to the heterogeneous nature of the reservoirs, limited sand continuity, unfavorable mobility for the waterflooding ongoing process, associated sand production, and wells lost due to collapses. Parallel efforts on fast-track studies and field development planning (FDP) were performed. The FDP incorporates technology application such as: 3D seismicNew geological modelNew correlation in detailed scaleDrilling in fresh oil areas, infill, and new structuresSelective water injectionNew waterflood design and monitoringStrong increment of water injected by pattern. From 2004 to 2008, the integrated project has increased the oil production from 5,200 BOPD to 11,900 BOPD with a reserves replacement ratio of more than 100% per year. All these factors provided extension to the life of this complex field while bringing additional financial benefits for the partners. The article presents the FDP planning methodology, that overall proved to be useful and repeatable for other fields. |
