低渗透油田粘度效应的实验研究

通过不同粘度流体的岩心流动模拟实验，揭示粘度变化对流体渗流及开发效果的影响。研究结果表明：渗透率一定时，原油的粘度越低，渗流越接近线性达西流。低渗透油田热洗井作业时，高温虽可解除部分蜡质、沥青质等的沉积，但又造成近井带原油脱气，流动阻力增加，影响油田开发速度和效果。

Experimental study of viscosity effect of low permeability reservoir

The influence of viscosity change on fluid percolation and development response is revealed through core flow test with fluids of different viscosity. The result shows that, when permeability is given, the lower the oil viscosity is, the closer is the percolation to linear Darcy flow. In thermal well-flushing operation for low permeability reservoir, although high temperature may remove parts of wax and asphalt deposition, it also causes crude degassing in immediate vicinity of wellbore, thus increasing flow resistance and affecting oilfield development velocity and effectiveness.