Study of Ultra-low Interfacial Tension Foam System Application in the Lamadian Oilfield
In order to study the effect of flooding conducted with an ultra-low interfacial tension foam system, the interfacial activity and foam stability of a non-ionic Gemini surfactant (DWS) were investigated under Lamadian oil reservoir conditions.The injection methods and alternate cycle are discussed here according to the results of the foam core flow experiment.The surface tension of DWS was approximately 25mN/m.Ultra-low interfacial tension was reached between oil and DWS with a surfactant concentration in the range of 0.05wt%to 0.4wt%.The binary system showed very good performance, and the preferential surfactant concentration was 0.3wt%, with a polymer concentration of 0.2wt%.When the gas-liquid ratio was 3 ∶ 1, the foam flow control capability was the strongest under the simultaneous injection of gas and liquid.The enhanced oil recovery rate of the binary foam system exceeded 10% after polymer flooding in a parallel natural core.
foaming system ultra-low interfacial tension enhanced oil recovery gas-liquid ratio alternate period
Hongsheng Liu
Exploration and Development Research Institute of Daqing Oilfield Company Ltd.,Daqing 163712, China
国内会议
青岛
英文
61-64
2013-06-26（万方平台首次上网日期，不代表论文的发表时间）