论文部分内容阅读
综合考虑弹性力、毛管力和重力的影响 ,建立了非均质层状砂岩油藏周期注水数学模型 ,提出了一种新的流动系数取值方法 ,并导出了相应的数值解 ,能够准确描述停注过程中毛管力作用引起的吸渗现象 .实例验证表明 :地层压力相对误差为 4 .0 % ,产液量相对误差为 4 .2 % ,含水率绝对误差为 1.1% .影响周期注水效果的主要因素是渗透率变异因数和层间连通程度 ;适合周期注水的油藏地质条件为 :层间连通程度大于 0 .6 ,非均质变异因数为 0 .6～ 0 .8
Taking into account the influence of elastic force, capillary force and gravity, a mathematical model of periodic injection of heterogeneous layered sandstone reservoir is established, a new method of calculating the flow coefficient is proposed, and corresponding numerical solutions are derived, which can accurately describe The results show that the relative error of formation pressure is 4.0%, the relative error of liquid production is 4.2% and the absolute error of water content is 1.1% The main factors are the permeability variation factor and the degree of interlayer connectivity. The reservoir geological conditions suitable for periodic water flooding are: the degree of interlayer connectivity is greater than 0.6, and the heterogeneity variation coefficient is 0.6 ~ 0.8