绥中36-1油田储层驱替特征研究

针对绥中 3 6 1油田油层多、厚度大、渗透率高以及储层反韵律明显等特征 ,通过物理实验模型的建立与应用 ,研究了注水速度、油水粘度比、储层韵律性以及油藏润湿性对驱油效果的影响 ,揭示了该油田的驱油特征和机理。绥中 3 6 1油田油藏润湿性为中性偏弱亲水性 ,油水粘度比和储层韵律性是影响水驱油采收率的重要因素 ,其采出程度随着注水速度的增加而有一定程度的降低。

A STUDY ON DISPLACEMENT CHARACTERISTICS OF SZ36-1 OILFIELD

Considering SZ36?1 oilfield is characterized by multiple beds, large thickness, high permeability and reverse rhythms of reservoir, the impacts of water injection rate, oil and water viscosity ratio, reservoir rhythms and reservoir wettability on displacement efficiency are studied by building and applying a model of physical experiment, and the displacement characteristics and mechanisms of the oilfield are revealed. For the wettability, the reservoir is intermediate to weak water wet. The oil and water viscosity ratio and reservoir rhythms are the most important factors to control the water flooding recovery, which may somewhat decline with increasing the water injection rate.