CAJ | 학술논문

近年来，随着注水开发进入特高含水阶段，剩余油的分布形态和流动状况发生了很大变化。为明确微观孔隙剩余油的形成机理，采用计算流体动力学软件 Fluent 对水驱油藏油滴的变形流动进行数值模拟计算，分析孔道的倾斜角度，润湿角和单根毛管并联双孔道对油滴变形流动规律的影响。研究表明：岩石的不同孔隙倾斜角度可影响油滴的变形，当孔隙与竖直方向存在夹角时，重力的作用不可忽略，驱替方向与重力方向的夹角可影响油滴的变形。并且油滴的变形随着润湿角的增大而更加明显。在单根毛管并联双孔道中，由于毛管半径不同剩余油的运移速度不同，先到达出口的油滴会对其余油滴产生阻碍其运动的力。研究结论可为进一步研究微观孔隙油滴变形机理提供理论依据。
근년래，수착주수개발진입특고함수계단，잉여유적분포형태화류동상황발생료흔대변화。위명학미관공극잉여유적형성궤리，채용계산류체동역학연건 Fluent 대수구유장유적적변형류동진행수치모의계산，분석공도적경사각도，윤습각화단근모관병련쌍공도대유적변형류동규률적영향。연구표명：암석적불동공극경사각도가영향유적적변형，당공극여수직방향존재협각시，중력적작용불가홀략，구체방향여중력방향적협각가영향유적적변형。병차유적적변형수착윤습각적증대이경가명현。재단근모관병련쌍공도중，유우모관반경불동잉여유적운이속도불동，선도체출구적유적회대기여유적산생조애기운동적력。연구결론가위진일보연구미관공극유적변형궤리제공이론의거。
In recent years, the water injection development has entered the stage of super high water cut. The distribution of remaining oil and the flow condition have changed greatly. To clarify the formation mechanism of remaining oil in micro pores, computational fluid dynamics software Fluent was used for numerical simulation of the oil droplets deformation flow of water-flooding reservoir, and then the influence of tilt angle of the channel, wetting angle and the single capillary tube parallel double channel on the flow of oil droplets was analyzed. The results show that, the different angle of the pore can affect the deformation of oil droplets; when there is angle between the pore and the vertical, the effect of gravity should not be neglected. The angle between the displacement direction and the gravity can affect the deformation of the oil droplets. And for oil wet rock, the deformation of the oil droplets becomes more obvious with the increase of wetting angle. In the single capillary tube parallel double channel, due to different capillary radius, residual oil migration velocity is different. And the oil droplets which first reach the exit will give the remaining oil droplets a force that can hinder their movement. The research conclusion may provide a theoretical basis for further study of deformation mechanism of oil droplets in the microscopic pore.