扶余油田已进入高含水开发后期,随着采出程度的不断加深及油层水洗程度的不断加重,可动用潜力层的性质及井况逐年变差,严重制约着压裂措施的实施。该油田正韵律沉积储层层内非均质性较强,长期注水开发过程中,造成层内底部水洗,且在沉积过程中形成东西向垂直裂缝,导致底水上窜,注入水无效、低效循环;加之扶余油田1/3区域位于城区,随着城区改造及大平台井的增多,剩余油挖潜难度增大。通过对储层沉积特征、水洗特征、剩余油分布规律研究,认识夹层及沉积构造界面对水淹、水洗层的影响特征。利用复合射孔技术,开展不同层位夹层、构造界面影响下的储层不同部位下的射孔技术,有效挖潜了储层内的剩余油,解决了水平井等措施成本高的问题。利用复合射孔技术的增油机理,开展了稠油区的实验。目前累计实施108口井,有效率达81%,累计增油6120t。 Fuyu Oilfield has entered the late stage of high water cut. With the deepening of the degree of recovery and the increasing degree of oil washing, the nature and well conditions of potential reservoirs deteriorate year by year, seriously restricting the implementation of fracturing measures. The heterogeneity of the positive rhythmic sedimentary reservoir in the oilfield is strong. During the long-term water injection development, the bottom of the layer is washed with water, and the east-west vertical cracks are formed during deposition, resulting in channeling at the bottom water and ineffective injection of water Cycle; combined with Fuyu Oilfield 1/3 area is located in urban areas, with the transformation of urban areas and large platform wells increased remaining oil tapping difficult. Through the study of reservoir sedimentary characteristics, water washing characteristics and remaining oil distribution, we know the influence characteristics of interlayer and sedimentary structure interface on water flooding and water washing layer. By using the perforation technique, the perforation technology under different layers of the interlayer and the interface of the tectonic interface is developed to effectively tap the residual oil in the reservoir and solve the problem of high cost of the horizontal well and other measures. The use of composite perforation technology to enhance the oil, carried out experiments in heavy oil area. The current total implementation of 108 wells, the effective rate of 81%, an increase of oil 6120t.