【摘要】 针对V上层系注聚前、后储层物性变化规律不明,不利于后续水驱提高采收率措施优选等问题,从储层岩石组分入手,对比分析了注聚前、后以及后续水驱等开发阶段的储层岩屑和黏土矿物成分含量、物性及储层物性变化,总结V上层系储层岩石特征及储层物性随开发阶段的变化规律。结果表明:聚驱前到后续水驱,水下分流河道及河口坝微相中绿泥石和伊蒙混层黏土矿物含量分别减少5%、9%,前缘席状砂微相绿泥石和伊蒙混层黏土矿物含量分别增加3%、3%;孔隙度减小0.95%、渗透率减小487.2×10-3μm2。更多还原

【Abstract】 The unknown change rule of physical properties of sandstone reservoirs after polymer injection is not conducive to optimal selection of subsequent water flooding measures for enhancing oil recovery. In this paper, mineral composition of cuttings and clay, reservoir physical properties of the V upper layer system before and after polymer flooding and during subsequent water flooding were contrastively analyzed. The change rules of reservoir characteristics and reservoir physical properties of the V upper layer system were discussed. The results showed that the contents of chlorite and illite-mongolian mixed layer clay minerals in subaqueous distributary channel and estuary bar microfacies decreased by 5% and 9% respectively, and the contents of chlorite and illite-mongolian mixed layer clay minerals in front sheet sand microfacies increased by 3% and 3%, porosity decreased by 0.95% and permeability decreased by 487.2 ×10-3μm2, from pre-polymer flooding to post-polymer flooding.更多还原