浅层低渗油藏压裂水平裂缝直井产能方程推导及应用

为了准确预测浅层低渗油藏压裂水平裂缝直井的产能，基于压裂水平裂缝在储集层中的分布及渗流理论，建立了浅层低渗压裂水平裂缝油藏渗流物理模型，继而推导了考虑储集层物性、流体属性、人工压裂水平裂缝及工作制度影响的浅层低渗压裂水平裂缝油藏直井产能方程。然后计算了延长长6储集层某直井产能，并进行了产能影响因素敏感性分析。结果表明，储集层垂向渗透率、原油粘度及压裂水平裂缝短半轴对产能影响较为显著，建立的直井产能方程应用简单、方便，计算结果满足工程精度。

Application and Derivation of Vertical Well Deliverability Equation for Shallow Layer and Low Permeability Reservoirs with Horizontal Fracture

In order to predict the productivity of vertical well for shallow layer and low permeability reservoirs with horizontal fracture, based on the theory of horizontal fracture distribution and oil percolation in reservoir, establish the reservoir percolation physical model for shallow layer and low permeability reservoirs with horizontal fracture, and derive a novel deliverability equation, considering the effect of reservoir properties, fluid properties, horizontal fracture parameters and working systems. Furthermore, the equation was applied and performed sensitivity analysis to productivity of a vertical well in Yanchang Chang 6 layer reservoir. Results show that vertical permeability, oil viscosity and the semiminor axis of horizontal fracture have more significant impact on well productivity. With real cases, it is demonstrated the established deliverability equation is simple and practical and meets the engineering accuracy requirements.