砂岩稠油油藏储层酸化增产原理及表皮系数研究

PRODUCTION INCREASE PRINCIPLE OF SANDSTONE HEAVY OIL RESERVOIR ACIDIZING AND THE RESEARCH ON SKIN FACTOR

砂岩稠油油藏储层的酸化主要集中在施工技术和方法研究上,还没有文献对砂岩稠油油藏储层酸化原理及模型、以及相应的表皮系数进行过报道。对伤害前后产能及采液指数比仍然使用的是达西流模型。基于迂曲度推导的幂律流体的流变特性方程、垂直井的产能预测模型,推导了受伤害井伤害前后的产能模型和相应的采液指数比。提出了砂岩稠油油藏储层的表皮系数新模型。分析了非牛顿流体流变特性参数对模型的影响,为砂岩稠油油藏的酸化提供理论依据。

At the present, acidizing for sandstone inspissated pool focus on construction technology and methods research, calculation the ratio of productivity and fluid productivity index before and after reservoir pollution still used Darcy model. This paper have deduced the productivity model and relevant fluid productivity index before and after reservoir pollution based on the rheological behavior equation of power-law flow and productivity prediction model of vertical well, and proposed the new skin factor model for sandstone inspissated pool. And the influence of Non-Newtonian rheological behavior parameters on model was analyzed. It provides the theoretical basis for acidizing of sandstone heavy reservoir.