缝洞型油藏三重介质数值试井模型影响因素

通过对缝洞型油藏三重介质数值试井模型进行数值求解,分析了各个模型参数对试井曲线的敏感性,确立了数值试井模型的参数体系。这些参数直接对应着油藏渗透性、缝洞大小、长度等物理量,更直观具体。不同的参数对曲线的影响方式不同：原始地层压力和裂缝渗透率影响压力恢复曲线的位置分布,表皮系数、井筒储集系数主要影响早期的曲线形状,基质渗透率等其他参数的影响则反映在曲线上的两个拐弯处,这些结论在曲线拟合求参时具有重要的参考价值。

INFLUENCING FACTORS OF THE NUMERICAL WELL TEST MODEL OF THE TRIPLE-CONTINUUM IN FRACTURED VUGGY RESERVOIR

The sensitivity of each parameter to the well testing curve is analyzed by solving triple-continuum numerical well testing model of fractured vuggy reservoir,and the parameter system of this numerical well testing model is determined.These parameters are corresponding to permeability,size and length of cave and fracture and so on.Different parameters have different influences on curve：initial formation pressure and fracture permeability have influence on the position of pressure build-up curve,skin factor;the well bore storage factor mainly has influence on the shape of early stage of pressure build-up curve,and other parameters have influence on the shape of the two turnings of the curve.All of these conclusions are very important for matching well testing curve.