高温氮气泡沫驱油数学模型研究

在对高温氮气泡沫驱油作用机理进行研究的基础上,建立了高温氮气泡沫驱油数学模型.该模型考虑了低界面张力体系驱油机理、泡沫封堵机理等.其中泡沫剂的运移方程充分考虑了对流、弥散及表面活性剂损失等机理.对该模型进行了自适应隐式方法数值求解.通过对实际的高温泡沫生产井进行历史拟合,可以看出,高温氮气泡沫驱油数学模型正确反映了热力采油和泡沫驱油的作用机理,具有较高的可靠性.

Research on Mathematical Model of High Temperature N2 Foam Flooding

Based on study on mechanisms of high temperature N2 foam flooding, mathematical model of this technology was developed. The mechanisms of low interfacial system flooding and foam flooding were concluded in the model. Convection, dispersion, and surfactant loss due to degradation and chemical reaction were considered in describing the surfactant flow in porous media. The models were solved by using adaptive implicit method. By matching the production history of a cyclic foam injection well, we can see that this model is valid in describing the mechanisms of thermal flooding and foam flooding and the model is reliable.