A Case Study: Improvement in Asphaltene Remediation by Focusing on Zonal Coverage and Flowback Efficiency

Abstract

As fields in the Deepwater and Ultra Deepwater areas in the Gulf of Mexico have matured, the frequency of asphaltene deposition within the reservoir has increased significantly. Operators reported that solvent treatments show initial production response but diminishing results and shorter treatment life with subsequent treatments. A field case study was undertaken to examine current best practices and identify opportunities for improvement. Areas needing improvement included targeting the less soluble age hardened asphaltene deposits, zonal coverage, and extending treatment life. This case study showed that measurable improvements were achieved on high asphaltene produing wells by utilizing new novel chemistry, better placement to facilitate longer soak times, effective diverting, and optimizing mechanical techniques.