柴达木盆地西部北区N2^1～N2^2低渗非常规储层应力敏感特征分析

Stress Sensitivity Analysis of N2^1～N2^2 Low Permeability Unconventional Reservoir in Northwest Qaidam Basin

通过室内实验对柴达木盆地西部北区储层岩石的应力敏感性进行了研究。结果表明,岩石类型对该区储层应力敏感性具有重要的影响,风暴岩应力敏感性一般为中偏弱,而灰泥岩储层具强的应力敏感性。风暴岩的渗透率恢复率明显高于灰泥岩的渗透率恢复率。

Based on the indoor experiments , stress sensitivity of reservoir rock from northwest Qaidam basin was studied. The rusult shows that rock type has important influence on stress sensitivity of the reservoir, the storm rock stress sensitivity is weak , and grey mudstone reservoir has strong stress sensitivity. The permeability recovery rate of storm rocks is significantly higher than that of lime mudstones.