三维物理模型驱油实验模拟装置研制与应用

Development and application of modeling device for oil /water displacement by 3d physical model

针对小岩心不能模拟注采井网驱替实验、填砂模型不能模拟低渗透储层和高压驱替实验的问题,研制了一套能在高温高压下进行不同渗透率储层多层组合的岩心、多口直井和水平井组成的注采井网、大尺度三维物理模型驱替实验装置,能进行不同驱替介质和吞吐实验研究。利用该实验装置开展了纵向三层组合的正韵律和反韵律模型、平面5个渗透带的五点注采井网模型、以及直井和水平井组成的十三点注采井网模型在高温高压下的水驱和聚合物驱油实验研究,得到了平面和纵向非均质性对水驱油效果的影响程度、直井和水平井的水驱油效果以及聚合物驱油效果。通过该装置模拟实验可为油田注采井网调整和注入开发方式调整提供技术指导。

In view of the difficulty of displacement simulation of injection-production pattern in small core sample and the difficulty of displacement simulation of low-permeability reservoir under high pressure in sand-packed model, a new experiment device for 3d physical simulation has been proposed. It deals with cores of different per- meability and injection-production pattern of horizontal and straight wells. Water flooding and polymer flooding ex- periments have been made under high pressure and temperature. Positive-rhythm and counter-rhythm models com- bined of 3 vertical layers, 5-spots injection-production pattern of 5 horizontal permeability zones, as well as 13- spots injection-production pattern of straight and horizontal wells have been studied. The influence of horizontal and vertical heterogeneity on oil/water displacement, the effect of straight and horizontal wells on oil/water dis- placement, as well as the effect of polymer flooding have been concluded. Experiment with this device may provide direct technical guidance for oil field flood pattern modification and injection development mode modification.