【摘要】 针对近井地带高速非达西渗流的影响,建立了溶洞与井筒连通情况下三重介质油藏的试井解释模型。通过数学变换和差分离散,给出了模型的数值解。与达西渗流的试井特征曲线不同,压力导数曲线在第一过渡段后明显上翘,孔缝洞总系统径向流的压力导数曲线高于0.5水平线。而近井地带的渗流速度越大,其非达西渗流影响区域就越大;随着溶洞窜流系数和溶洞弹性储容比的减小,压力导数曲线的过渡段出现时间延迟且下凹程度加深的现象。在塔河油田S74井的应用效果表明,新建模型具有较高的可靠性和实用性。更多还原

【Abstract】 Considering the influence of high-velocity non-Darcy flow,a well test interpretation model for triple-porosity-media oil reservoirs was presented on the condition of limestone cave connecting with borehole.The numerical solution of the model was given by math transform and difference.Differing from the characteristic curve of well testing in Darcy flow,pressure derivative curve is upward obviously after the first transition period.The radial flow horizontal line of the total pore-crack-vug system is over 0.5.As flow velocity in immediate vicinity of wellbole is bigger,the influencingregion of non-Darcy flow is bigger.And along with decreasingof interporosity flow coefficient and storativity ratio of the limestone cave,the appearing time of pressure derivative transitionsection delays and the concave degree of pressure derivative curve deepens.The reliability and practicability of the new model has been validated by the example of well No.S74 in Tahe Oilfield.更多还原