Combined Oil Displacment System and Field Test of Composite Surfactant

Abstract:

Laboratory evaluation showed that rhamnolipid combined displacement system with low and wide effective concentration (0.125%~1.0%) can reduce interfacial tension with Pubei oil and water to 10-2mN/m. Injection of 0.5PV of rhamnolipid combined displacement system in natural core simulating reservoir permeability can increase recovery by 7.9%~9.3% more than water flooding. Field test for rhamnolipid combined displacement system was carried out with 2 injectors and 9 producers. Alternating injection is performed with two slugs with total volume of 19895.5m3, containing 250.9t of dosage. During 13 months of field test, stageous cumulative incremental oil production was 2014t, with 224t of average single well incremental oil. Daily oil production increased from 1.5t/d to 1.85t/d, average water cut decreased by1.5%, and input-output ratio was 1:2.4. This study provided a new way to improve oil recovery for other similar water flooded reservoirs.

• Periodical: Advanced Materials Research (Volumes 641-642)
• Pages: 77-81
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.641-642.77
• Online since: January 2013
• Authors: Xiao Lin Wu, Jian Jun Le, Ming Jun Wang, Wei Li, Meng Hua Guo, Rui Wang, Lu Lu Bai, Xiao Lei Wu
• Keywords: Combined Oil Displacement System, Composite Surfactant, Field Test, Interfacial Tension, Recovery

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