【摘要】 根据传热学理论,考虑注汽层间热干扰的影响,建立用于描述多层油藏双层注汽时层间热干扰的热传递数学模型,在Mandl-Volek单层油藏蒸汽驱热效率计算方法的基础上推导多层油藏的热效率计算公式,运用拉普拉斯变换和Stehfest数值反演方法进行求解,分析隔层厚度对层间热干扰和注汽热效率的影响。结果表明:增加井底蒸汽的潜热比有利于提高注汽层的热效率;与单层油藏相比,由于层间热干扰作用,多层油藏双层注汽的热效率有明显提高;隔层厚度越小,层间热干扰作用越强,注汽热效率越高。更多还原

【Abstract】 According to the thermal equilibrium theory,a model for predicting the heat transfer between the injection layer and non-injection layer was established considering the heat interaction effect.Moreover,a formula calculating heat efficiency in multilayer reservoir was put forward based on the Mandl-Volek model,and Laplace analysis transform and Stehfest numerical inversion were used to calculate the model.And the effects of interlayer thickness on heat interaction and heat efficiency were analyzed.The results show that the more the sandface steam latent heat ratio,the higher the heat efficiency of the injection layer.Compared with the single layer reservoir,the heat inrteraction imposes significant effect on the heat efficiency,and the thinner the center layer,the stronger the heat interaction,and the higher the heat efficiency.更多还原