低渗强水敏储层单相油渗流特征实验研究

Experiment Research on Single-phase Oil Seepage Characteristics of Low Permeability and High Water Sensitivity Reservoirs

对W油田N21超低渗储层岩心进行单相油渗流实验研究,结果表明流体在低速渗流时,非线性渗流特征明显,存在启动压力梯度,且水敏性低渗储层的启动压力梯度明显更高。W油田N21水敏性低渗储层原油渗流能力差,一般油相渗透率不大于气测渗透率的2%。

The core single-phase oil flow experiments about N21 ultra-low permeability reservoir of W oil tielo were cameo out. The results show that the fluid under low speed percolation has obvious nonlinear seepage characteristics, there is start-up pressure gradient, and low permeability reservoir with water sensitivity has significantly higher start-up pressure gradient. N21 water sensitivity low permeability oil reservoir has poor percolation capacity; the oil phase permeability is not more than 2% of gas logging permeability.