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应用常规的油藏工程方法,进行低渗透油藏动态预测普遍存在较大的误差。对此,在考虑启动压力梯度、应力敏感性、牛顿流体微压缩性以及流体粘度可变性的基础上,运用渗流理论,建立了低渗透油藏非线性平面径向稳定渗流模型,应用解析方法对模型进行求解。结合华庆油田白155井区超低渗透油藏的开发实例,对影响油井的产能因素进行参数敏感性分析,绘制了不同参数下油井的产能曲线。与达西线性渗流对比,提出该模型可用来评价油井产能以及进行产能预测。
Using conventional reservoir engineering methods, there are generally large errors in the dynamic prediction of low permeability reservoirs. In view of this, considering the start-up pressure gradient, stress sensitivity, micro-compressibility of Newtonian fluid and variability of fluid viscosity, a nonlinear steady-state radial steady seepage model of low permeability reservoir is established by using seepage theory. Model to solve. Combined with the development of ultra-low permeability reservoirs in Bai 155 well in Huaqing Oilfield, parameter sensitivity analysis was conducted on the production factors affecting the well, and the yield curves of the wells under different parameters were plotted. In contrast to Darcy’s linear seepage, the proposed model can be used to evaluate well productivity and predict production capacity.