Decrease of the oil displacement efficiency of the damaged reservoirs is mainly resulted from the reduction of matrix permeability, change of wettability and increase of capillarypressure.
基质渗透率的降低、润湿性的改变以及毛细管压力的增大是储层驱油效率降低的主要因素。
2
The reservoir also features in low displacementpressure, low median capillary pressure, well-developed microscopic pore structure, and medium-to-large pore throat.