Abstract
Alpha field is situated in SPDC's OML 22 in the eastern part of the Niger delta belt, some 60kM NW of Port Harcourt. The field discovered in 1986, currently has 9 wells completed and 13 drainage points. Well A-4L is one of the completed intervals on the S7000E horizon. Production from this interval began in April 1997 and oil recovery averaged 2000 STB/D. Sand production was anticipated under normal drawdown from production onset and as such the well was completed with sand-control measures in place.
After about ten years of production, a significant amount of sand was observed during routine sampling of the well. This condition resulted in the closure of the well for high sand production.
To restore production from the well, current economic realities favored through tubing intervention. Two major types of through tubing remedial sand control solutions were considered namely mechanical and screen-less (chemical consolidation) methods. A proprietary HDR squeeze pack technique (mechanical method) was identified as the best solution that meets post intervention production requirements and also affords completion longevity. Total cost of deployment to recover 0.75MMbbl of oil was USD$0.650M compared to projected USD$5.0M for possible hoist re-entry.
This paper details the deployment process of this Novel solution that has successfully restored production from Well A-4L.
