【摘要】 建立了裂缝性砂岩油藏周期注水数学模型 ,分别给出了数学模型的数值解和解析解 .应用该模型进行了周期注水模拟计算 ,分析了裂缝与基质孔隙度比值、油水粘度比、基质毛管力、周期注水开始时间、注水周期等因素对周期注水效果的影响 .结果表明 ,油水粘度比越小 ,基质的毛管力越大 ,裂缝性砂岩油藏周期注水的效果越好 ;当裂缝与基质孔隙度比值小于 0 .0 5时 ,周期注水与连续注水几乎没有差别 ;当裂缝与基质孔隙度比值大于 0 .2时 ,水驱采收率能够提高 2 .5%以上 .更多还原

【Abstract】 The cycle injection math model for fracture stone reservoir is established, and both of analysis solution and numerical solution are given in this paper. A modeling calculation is done for cycle injection. Besides, the effects of porosity ratio of fracture to matrix, viscosity ratio of oil to water, capillary force of matrix, the opportunity of cycle injection and injection period on cycle injection outcome are analyzed. The results show that, the lower is viscosity ratio of oil to water and the greater is capillary force of matrix, the better is the effect of cycle injection. For fracture stone reservoir, when porosity ratio of fracture to matrix is less than 0.05, there is no difference between cycle injection and general injection. However, when porosity ratio of fracture to matrix is greater than 0.2, the waterflood recovery factor can be improved over 2.5%更多还原