砂砾岩油藏特高含水期储层参数变化规律

以典型的砂砾岩油藏—双河油田为例,运用特高含水期油井密闭取芯、长岩心水驱油实验等室内实验资料,对油层水淹状况变化规律、物性参数变化规律孔隙结构参数变化规律、储层渗流特征变化规律等进行了分析研究;结果发现,随着储层水淹程度加剧,储层物性参数、孔隙结构参数与渗流特征均发生了根本变化,由此认为,油田开发后期调整挖潜对策应相应变化。

CHANGES OF RESERVOIR CHARACTERISTICS DURING LTRA-HIGH WATER CUT PERIOD: SHUANGHE OILFIELD

Taking a typical glutenite reservoir—Shuanghe oilfield as an example, the authors of this paper made an investigation into the regularities of changes in poroperm parameters, pore structures and fluid flow characteristics of glutenite oil reservoirs during ultra-high water cut period. Sealed cores from oil wells were examined, and waterflood experiments with long cores from the oilfield were performed. Results show that reservoir poroperm parameters, pore structures and fluid flow characteristics change drastically with increased levels of waterflooding. It is pointed out that development strategy should be adjusted accordingly in late development phase of such reservoirs.