COMBINED OIL DISPLACMENT SYSTEM AND FIELD TEST OF COMPOSITE SURFACTANT
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.
composite surfactant combined oil displacement system interfacial tension field test recovery
Wu Xiaolin Le Jianiun Wang Mingjun Li Wei Guo Menghua Wang Rui Bai Lulu WU Xiaolei
Exploration and Development Research Institute of Daqing Oilfield Company, Daqing 163712,Heilongjian Technology Supervisory Center of Daqing Petroleum Administrative Bureau, Daqing 163453,Heilongjiang, College of Engineering, Peking University, Beijing 100871,China
国际会议
厦门
英文
77-81
2012-12-28（万方平台首次上网日期，不代表论文的发表时间）