苏北盆地陈堡油田微观水驱油机理及水驱油效率影响因素研究

STUDY ON MICROSCOPIC WATER-DRIVE MECHANISM AND THE AFFECTING FACTORS OF WATER-DRIVE EFFICIENCY IN CHENBAO OILFIELD, THE NORTH JIANGSU BASIN

该文应用水驱油试验、微观水驱油试验以及核磁共振等技术手段对陈堡油田主要含油层的水驱油机理及影响水驱油效率的因素进行了较为系统的研究。结果表明,该油田各砂层组的驱油效率差异主要是受储层的宏观非均质性、岩石的细观非均质性和油水粘度比的影响,在一定的渗透率范围内受渗透率的影响较小;微观上驱油效率则主要是受孔隙结构的影响。

Test techniques such as the oilwater displacement test, the microscopic waterdrive test and the nuclear magnetic resonance were applied in this paper to study waterdrive mechanism and the affecting factors of waterdrive efficiency in the main oil layers of ChenBao oilfield. The results showed that the difference of waterdrive efficiency within each sandlayer group of the oilfield was mainly affected by the macroscopic heterogeneity of reservoirs, the smallscopic heterogeneity of rocks and oil/water viscosity ratio, and was affected slightly by permeability in some range of permeability. On microscopic level, waterdrive efficiency was mostly affected by pore structure.