CAJ | 학술논문

针对ZY油田的油藏高温高盐的特点，筛选出了空气泡沫驱的起泡剂配方，该体系在温度90℃、120℃条件时，矿化度达到25×104 mg/L条件下老化2-3个月后，起泡体积仍可保持在(600~700) ml范围，有良好的稳泡性能；起泡体系与ZY原油的界面张力可达到10-2 mN/m，表明该起泡体系有一定的降低界面张力能力；室内填砂管物理模拟实验研究表明，与空气驱和表面活性剂驱相比，空气泡沫调驱体系可在水驱后更有效地提高采收率；微观驱油实验表明空气泡沫驱可通过抑制粘性指进，改变流体方向来提高驱油效率。
침대ZY유전적유장고온고염적특점，사선출료공기포말구적기포제배방，해체계재온도90℃、120℃조건시，광화도체도25×104 mg/L조건하노화2-3개월후，기포체적잉가보지재(600~700) ml범위，유량호적은포성능；기포체계여ZY원유적계면장력가체도10-2 mN/m，표명해기포체계유일정적강저계면장력능력；실내전사관물리모의실험연구표명，여공기구화표면활성제구상비，공기포말조구체계가재수구후경유효지제고채수솔；미관구유실험표명공기포말구가통과억제점성지진，개변류체방향래제고구유효솔。
A new foaming agent system was screened to investigate the feasibility of air-foam flooding EOR technology for high temperature and high salinity reservoir in ZY oilfield. The bubble volume of this system can be maintained in the range of (600-700) ml in the condition of 120 ℃ and a salinity of 20×104 mg/L after aging for (2-3) months, which shows a good foam stabilization performance. Simultaneously, an interfacial tension of 10-2 mN/m can be achieved between the system and crude oil, which suggests that this system has a capability of reducing the interfacial tension. In order to evaluate the displacement effect, sand pack physical simulation experiments on this system was conducted, and the result shows air-foam flooding can enhance oil recovery more efficiently after water flooding, compared with air displacement and surfactant flooding. From the microscopic oil displacement experiment, we can observe that air-foam flooding may change the direction of liquid flow by controlling viscous fingering, and thus, can further improve the displacement efficiency.