【摘要】 利用微观尺度管流模型,结合普通稠油流变特征,提出了在考虑稠油流变性条件下微观启动压力梯度计算方法。对渤海渤中18块不同渗透率岩心进行室内驱替实验,通过对实验数据的回归分析,得到不同粘度普通稠油油藏启动压力梯度与地层平均渗透率关系,并绘制了启动压力梯度的图版。将研究结果应用于普通稠油油藏,给出了利用启动压力梯度确定极限泄油半径及合理井距的理论计算方法。更多还原

【Abstract】 The calculation method of microcosmic starting pressure gradient is put forward based on the model of pipe flowing and rheological behaviour of conventional heavy oil.Displacement experiments were carried out by using 18 cores of different permeability from the middle of Bohai oilfield.Regression analysis of the experiment data has provided the relationship between starting pressure gradient and average reservoir permeability of conventional heavy oils with different viscosity.Starting pressure gradient chart is also provided.This method can be used for conventional heavy oil reservoir to calculate ultimate drainage radius and reasonable well spacing through starting pressure gradient.更多还原